marv
:Hi: I have a Radiola 60 that sounds great except for the volumne control. I located a parts control that is original to a Radiola. It is wirewound and tests at 480 ohms which is close to what it should be. I cleaned it and put it into the radio but it is not working properly. It had oxidized but appeared to clean up nicely and it was still showing the correct ohms but when it was put in it did reduce the volumne but it will not increase it. Any suggestions on where to look? I thought about rewiding it and was wanting to know what guage might be appropriate (looks like 34). I'm also guessing this would be regular wire and not the lacquered type found on coils. Thanks for any suggestions. Al
Can you still buy resistance wire? If not would it be possible to retrofit a newer pot? Thanks. Al
Al,
:Its a variable resistor, and like all wire wound controls the wire is resistance wire like nichrome or similar. Regular wire will not work.
:
:
:marv
:
:
::Hi: I have a Radiola 60 that sounds great except for the volumne control. I located a parts control that is original to a Radiola. It is wirewound and tests at 480 ohms which is close to what it should be. I cleaned it and put it into the radio but it is not working properly. It had oxidized but appeared to clean up nicely and it was still showing the correct ohms but when it was put in it did reduce the volumne but it will not increase it. Any suggestions on where to look? I thought about rewiding it and was wanting to know what guage might be appropriate (looks like 34). I'm also guessing this would be regular wire and not the lacquered type found on coils. Thanks for any suggestions. Al
Power wise, I don't think a replacement volume control needs to be very hefty, nor do I think it has to be wire-wound. But, since it's in parallel with several other resistors, the apple-cart might get upset if the resistance value varies greatly from 450 ohms. Such a low value might put you in the wirewound rheostat category. You can fish around on Mouser, and probably find something that will be suitable.
I've never tried rewinding a wirewound pot, but it doesn't sound like fun to me.
Can you possibly identify where the open is, and make a mechanical splice after unwinding a turn or two? Resistance wire can't be soldered, so you'd probably need to twist the two ends together with a pair of pliers.
:Thanks Marv:
:
:Can you still buy resistance wire? If not would it be possible to retrofit a newer pot? Thanks. Al
:
:Al,
::Its a variable resistor, and like all wire wound controls the wire is resistance wire like nichrome or similar. Regular wire will not work.
::
::
::marv
::
::
:::Hi: I have a Radiola 60 that sounds great except for the volumne control. I located a parts control that is original to a Radiola. It is wirewound and tests at 480 ohms which is close to what it should be. I cleaned it and put it into the radio but it is not working properly. It had oxidized but appeared to clean up nicely and it was still showing the correct ohms but when it was put in it did reduce the volumne but it will not increase it. Any suggestions on where to look? I thought about rewiding it and was wanting to know what guage might be appropriate (looks like 34). I'm also guessing this would be regular wire and not the lacquered type found on coils. Thanks for any suggestions. Al
marv
:Al, here's your schematic: http://www.nostalgiaair.org/PagesByModel/337/M0040337.pdf
:
:Power wise, I don't think a replacement volume control needs to be very hefty, nor do I think it has to be wire-wound. But, since it's in parallel with several other resistors, the apple-cart might get upset if the resistance value varies greatly from 450 ohms. Such a low value might put you in the wirewound rheostat category. You can fish around on Mouser, and probably find something that will be suitable.
:
:I've never tried rewinding a wirewound pot, but it doesn't sound like fun to me.
:
:Can you possibly identify where the open is, and make a mechanical splice after unwinding a turn or two? Resistance wire can't be soldered, so you'd probably need to twist the two ends together with a pair of pliers.
:
::Thanks Marv:
::
::Can you still buy resistance wire? If not would it be possible to retrofit a newer pot? Thanks. Al
::
::Al,
:::Its a variable resistor, and like all wire wound controls the wire is resistance wire like nichrome or similar. Regular wire will not work.
:::
:::
:::marv
:::
:::
::::Hi: I have a Radiola 60 that sounds great except for the volumne control. I located a parts control that is original to a Radiola. It is wirewound and tests at 480 ohms which is close to what it should be. I cleaned it and put it into the radio but it is not working properly. It had oxidized but appeared to clean up nicely and it was still showing the correct ohms but when it was put in it did reduce the volumne but it will not increase it. Any suggestions on where to look? I thought about rewiding it and was wanting to know what guage might be appropriate (looks like 34). I'm also guessing this would be regular wire and not the lacquered type found on coils. Thanks for any suggestions. Al
:Doug/Al,
:I've done the twist method, then crimped it a little with fixed ww resistors but the wiper may be a problem on a pot, unless care is taken to keep the mended area away from the wiper travel. Even removing a fraction of a turn in order to keep the mended area from the wiper will not have an appreciable affect on the R value. I've unwound a few for other purposes, but rewinding would be quite a chore.
:
:marv
:
::Al, here's your schematic: http://www.nostalgiaair.org/PagesByModel/337/M0040337.pdf
::
::Power wise, I don't think a replacement volume control needs to be very hefty, nor do I think it has to be wire-wound. But, since it's in parallel with several other resistors, the apple-cart might get upset if the resistance value varies greatly from 450 ohms. Such a low value might put you in the wirewound rheostat category. You can fish around on Mouser, and probably find something that will be suitable.
::
::I've never tried rewinding a wirewound pot, but it doesn't sound like fun to me.
::
::Can you possibly identify where the open is, and make a mechanical splice after unwinding a turn or two? Resistance wire can't be soldered, so you'd probably need to twist the two ends together with a pair of pliers.
::
:::Thanks Marv:
:::
:::Can you still buy resistance wire? If not would it be possible to retrofit a newer pot? Thanks. Al
:::
:::Al,
::::Its a variable resistor, and like all wire wound controls the wire is resistance wire like nichrome or similar. Regular wire will not work.
::::
::::
::::marv
::::
::::
:::::Hi: I have a Radiola 60 that sounds great except for the volumne control. I located a parts control that is original to a Radiola. It is wirewound and tests at 480 ohms which is close to what it should be. I cleaned it and put it into the radio but it is not working properly. It had oxidized but appeared to clean up nicely and it was still showing the correct ohms but when it was put in it did reduce the volumne but it will not increase it. Any suggestions on where to look? I thought about rewiding it and was wanting to know what guage might be appropriate (looks like 34). I'm also guessing this would be regular wire and not the lacquered type found on coils. Thanks for any suggestions. Al
:Marv/Doug:
:Thanks guys. I think I'll do some unwinding to see if it can be done that way. Does it seem odd that it would still have the correct resistence of 480 ohms with a break in it? I may not have enough years left to rewind one of those things. Is there a place that sells resistence wire? Thanks again for the suggestions. Looks like I have my work cut out for me.
::
:Al
:
::Doug/Al,
::I've done the twist method, then crimped it a little with fixed ww resistors but the wiper may be a problem on a pot, unless care is taken to keep the mended area away from the wiper travel. Even removing a fraction of a turn in order to keep the mended area from the wiper will not have an appreciable affect on the R value. I've unwound a few for other purposes, but rewinding would be quite a chore.
::
::marv
::
:::Al, here's your schematic: http://www.nostalgiaair.org/PagesByModel/337/M0040337.pdf
:::
:::Power wise, I don't think a replacement volume control needs to be very hefty, nor do I think it has to be wire-wound. But, since it's in parallel with several other resistors, the apple-cart might get upset if the resistance value varies greatly from 450 ohms. Such a low value might put you in the wirewound rheostat category. You can fish around on Mouser, and probably find something that will be suitable.
:::
:::I've never tried rewinding a wirewound pot, but it doesn't sound like fun to me.
:::
:::Can you possibly identify where the open is, and make a mechanical splice after unwinding a turn or two? Resistance wire can't be soldered, so you'd probably need to twist the two ends together with a pair of pliers.
:::
::::Thanks Marv:
::::
::::Can you still buy resistance wire? If not would it be possible to retrofit a newer pot? Thanks. Al
::::
::::Al,
:::::Its a variable resistor, and like all wire wound controls the wire is resistance wire like nichrome or similar. Regular wire will not work.
:::::
:::::
:::::marv
:::::
:::::
::::::Hi: I have a Radiola 60 that sounds great except for the volumne control. I located a parts control that is original to a Radiola. It is wirewound and tests at 480 ohms which is close to what it should be. I cleaned it and put it into the radio but it is not working properly. It had oxidized but appeared to clean up nicely and it was still showing the correct ohms but when it was put in it did reduce the volumne but it will not increase it. Any suggestions on where to look? I thought about rewiding it and was wanting to know what guage might be appropriate (looks like 34). I'm also guessing this would be regular wire and not the lacquered type found on coils. Thanks for any suggestions. Al
When I reconnect the control it reduces the volume to an almost inaudible level. Advancing the wiper does nothing to increase the volume. If completely disconnected the volume is very loud.
I did check the ohms by advancing the wiper and it steadily increased from near zero to 390 ohms. I could only do that by connecting the ohm meter to the first and middle lug of the volume control. If I connected the meter to the first and third lug it reads 390 ohms regardless of the position of the wiper. The center lug appears to be the ground connection. Any thoughts?
Thanks. Al
:Marv/Doug:
:Thanks guys. I think I'll do some unwinding to see if it can be done that way. Does it seem odd that it would still have the correct resistence of 480 ohms with a break in it? I may not have enough years left to rewind one of those things. Is there a place that sells resistence wire? Thanks again for the suggestions. Looks like I have my work cut out for me.
::
:Al
:
::Doug/Al,
::I've done the twist method, then crimped it a little with fixed ww resistors but the wiper may be a problem on a pot, unless care is taken to keep the mended area away from the wiper travel. Even removing a fraction of a turn in order to keep the mended area from the wiper will not have an appreciable affect on the R value. I've unwound a few for other purposes, but rewinding would be quite a chore.
::
::marv
::
:::Al, here's your schematic: http://www.nostalgiaair.org/PagesByModel/337/M0040337.pdf
:::
:::Power wise, I don't think a replacement volume control needs to be very hefty, nor do I think it has to be wire-wound. But, since it's in parallel with several other resistors, the apple-cart might get upset if the resistance value varies greatly from 450 ohms. Such a low value might put you in the wirewound rheostat category. You can fish around on Mouser, and probably find something that will be suitable.
:::
:::I've never tried rewinding a wirewound pot, but it doesn't sound like fun to me.
:::
:::Can you possibly identify where the open is, and make a mechanical splice after unwinding a turn or two? Resistance wire can't be soldered, so you'd probably need to twist the two ends together with a pair of pliers.
:::
::::Thanks Marv:
::::
::::Can you still buy resistance wire? If not would it be possible to retrofit a newer pot? Thanks. Al
::::
::::Al,
:::::Its a variable resistor, and like all wire wound controls the wire is resistance wire like nichrome or similar. Regular wire will not work.
:::::
:::::
:::::marv
:::::
:::::
::::::Hi: I have a Radiola 60 that sounds great except for the volumne control. I located a parts control that is original to a Radiola. It is wirewound and tests at 480 ohms which is close to what it should be. I cleaned it and put it into the radio but it is not working properly. It had oxidized but appeared to clean up nicely and it was still showing the correct ohms but when it was put in it did reduce the volumne but it will not increase it. Any suggestions on where to look? I thought about rewiding it and was wanting to know what guage might be appropriate (looks like 34). I'm also guessing this would be regular wire and not the lacquered type found on coils. Thanks for any suggestions. Al
If your pot tests good there would be no reason to rewind it, when you test it does the wiper vary the resistance? if it does your problem may be in another area.
Dave
:Hi: I have a Radiola 60 that sounds great except for the volumne control. I located a parts control that is original to a Radiola. It is wirewound and tests at 480 ohms which is close to what it should be. I cleaned it and put it into the radio but it is not working properly. It had oxidized but appeared to clean up nicely and it was still showing the correct ohms but when it was put in it did reduce the volumne but it will not increase it. Any suggestions on where to look? I thought about rewiding it and was wanting to know what guage might be appropriate (looks like 34). I'm also guessing this would be regular wire and not the lacquered type found on coils. Thanks for any suggestions. Al
When I reconnect the control it reduces the volume to an almost inaudible level. Advancing the wiper does nothing to increase the volume. If completely disconnected the volume is very loud.
I did check the ohms by advancing the wiper and it steadily increased from near zero to 390 ohms. I could only do that by connecting the ohm meter to the first and middle lug of the volume control. If I connected the meter to the first and third lug it reads 390 ohms regardless of the position of the wiper. The center lug appears to be the ground connection. Any thoughts?
Thanks. Al
Al, I'm a little confused by your statement that the volume control decreases the volume, but doesn't increase it. Can you clarify that?
::
::
:::Hi: I have a Radiola 60 that sounds great except for the volumne control. I located a parts control that is original to a Radiola. It is wirewound and tests at 480 ohms which is close to what it should be. I cleaned it and put it into the radio but it is not working properly. It had oxidized but appeared to clean up nicely and it was still showing the correct ohms but when it was put in it did reduce the volumne but it will not increase it. Any suggestions on where to look? I thought about rewiding it and was wanting to know what guage might be appropriate (looks like 34). I'm also guessing this would be regular wire and not the lacquered type found on coils. Thanks for any suggestions. Al
marv
:::Doug:
:
:When I reconnect the control it reduces the volume to an almost inaudible level. Advancing the wiper does nothing to increase the volume. If completely disconnected the volume is very loud.
:
:I did check the ohms by advancing the wiper and it steadily increased from near zero to 390 ohms. I could only do that by connecting the ohm meter to the first and middle lug of the volume control. If I connected the meter to the first and third lug it reads 390 ohms regardless of the position of the wiper. The center lug appears to be the ground connection. Any thoughts?
:
:Thanks. Al
:
:
:
:
:Al, I'm a little confused by your statement that the volume control decreases the volume, but doesn't increase it. Can you clarify that?
:::
:::
::::Hi: I have a Radiola 60 that sounds great except for the volumne control. I located a parts control that is original to a Radiola. It is wirewound and tests at 480 ohms which is close to what it should be. I cleaned it and put it into the radio but it is not working properly. It had oxidized but appeared to clean up nicely and it was still showing the correct ohms but when it was put in it did reduce the volumne but it will not increase it. Any suggestions on where to look? I thought about rewiding it and was wanting to know what guage might be appropriate (looks like 34). I'm also guessing this would be regular wire and not the lacquered type found on coils. Thanks for any suggestions. Al
:::Doug:
:
:When I reconnect the control it reduces the volume to an almost inaudible level. Advancing the wiper does nothing to increase the volume. If completely disconnected the volume is very loud.
:
:I did check the ohms by advancing the wiper and it steadily increased from near zero to 390 ohms. I could only do that by connecting the ohm meter to the first and middle lug of the volume control. If I connected the meter to the first and third lug it reads 390 ohms regardless of the position of the wiper. The center lug appears to be the ground connection. Any thoughts?
:
:Thanks. Al
:
:
:
:
:Al, I'm a little confused by your statement that the volume control decreases the volume, but doesn't increase it. Can you clarify that?
:::
:::
::::Hi: I have a Radiola 60 that sounds great except for the volumne control. I located a parts control that is original to a Radiola. It is wirewound and tests at 480 ohms which is close to what it should be. I cleaned it and put it into the radio but it is not working properly. It had oxidized but appeared to clean up nicely and it was still showing the correct ohms but when it was put in it did reduce the volumne but it will not increase it. Any suggestions on where to look? I thought about rewiding it and was wanting to know what guage might be appropriate (looks like 34). I'm also guessing this would be regular wire and not the lacquered type found on coils. Thanks for any suggestions. Al
Here is the schematic for the Radiola 60:
http://www.nostalgiaair.org/PagesByModel/337/M0040337.pdf
Radiodoc
: Al, from what your saying the pot, if its supposed to be 390 ohms, seems to be working correctly. You should get the varying ohm reading between either end and the center terminal. If you only get the varying reading from one end to the center then the pot has to be repaired. Each end terminal must connect to the resistance path in the pot. When placed in the circuit I do not believe the center terminal(wiper) should go directly to ground. I don't have a schematic but I've can't see how direct grounding would be done in a circuit for volume control. PL
:
::::Doug:
::
::When I reconnect the control it reduces the volume to an almost inaudible level. Advancing the wiper does nothing to increase the volume. If completely disconnected the volume is very loud.
::
::I did check the ohms by advancing the wiper and it steadily increased from near zero to 390 ohms. I could only do that by connecting the ohm meter to the first and middle lug of the volume control. If I connected the meter to the first and third lug it reads 390 ohms regardless of the position of the wiper. The center lug appears to be the ground connection. Any thoughts?
::
::Thanks. Al
::
::
::
::
::Al, I'm a little confused by your statement that the volume control decreases the volume, but doesn't increase it. Can you clarify that?
::::
::::
:::::Hi: I have a Radiola 60 that sounds great except for the volumne control. I located a parts control that is original to a Radiola. It is wirewound and tests at 480 ohms which is close to what it should be. I cleaned it and put it into the radio but it is not working properly. It had oxidized but appeared to clean up nicely and it was still showing the correct ohms but when it was put in it did reduce the volumne but it will not increase it. Any suggestions on where to look? I thought about rewiding it and was wanting to know what guage might be appropriate (looks like 34). I'm also guessing this would be regular wire and not the lacquered type found on coils. Thanks for any suggestions. Al
Al
Planigan,
:
:Here is the schematic for the Radiola 60:
:
:http://www.nostalgiaair.org/PagesByModel/337/M0040337.pdf
:
:Radiodoc
:
:
:: Al, from what your saying the pot, if its supposed to be 390 ohms, seems to be working correctly. You should get the varying ohm reading between either end and the center terminal. If you only get the varying reading from one end to the center then the pot has to be repaired. Each end terminal must connect to the resistance path in the pot. When placed in the circuit I do not believe the center terminal(wiper) should go directly to ground. I don't have a schematic but I've can't see how direct grounding would be done in a circuit for volume control. PL
::
:::::Doug:
:::
:::When I reconnect the control it reduces the volume to an almost inaudible level. Advancing the wiper does nothing to increase the volume. If completely disconnected the volume is very loud.
:::
:::I did check the ohms by advancing the wiper and it steadily increased from near zero to 390 ohms. I could only do that by connecting the ohm meter to the first and middle lug of the volume control. If I connected the meter to the first and third lug it reads 390 ohms regardless of the position of the wiper. The center lug appears to be the ground connection. Any thoughts?
:::
:::Thanks. Al
:::
:::
:::
:::
:::Al, I'm a little confused by your statement that the volume control decreases the volume, but doesn't increase it. Can you clarify that?
:::::
:::::
::::::Hi: I have a Radiola 60 that sounds great except for the volumne control. I located a parts control that is original to a Radiola. It is wirewound and tests at 480 ohms which is close to what it should be. I cleaned it and put it into the radio but it is not working properly. It had oxidized but appeared to clean up nicely and it was still showing the correct ohms but when it was put in it did reduce the volumne but it will not increase it. Any suggestions on where to look? I thought about rewiding it and was wanting to know what guage might be appropriate (looks like 34). I'm also guessing this would be regular wire and not the lacquered type found on coils. Thanks for any suggestions. Al
::I checked the right terminal of the pot and the ohm meter was all over the place. I've ordered a 500 ohm substitute to see if that will cure the problem. Thanks to all for some helpful test procedures and websites. You guys are the best.
:
:Al
:
:Planigan,
::
::Here is the schematic for the Radiola 60:
::
::http://www.nostalgiaair.org/PagesByModel/337/M0040337.pdf
::
::Radiodoc
::
::
::: Al, from what your saying the pot, if its supposed to be 390 ohms, seems to be working correctly. You should get the varying ohm reading between either end and the center terminal. If you only get the varying reading from one end to the center then the pot has to be repaired. Each end terminal must connect to the resistance path in the pot. When placed in the circuit I do not believe the center terminal(wiper) should go directly to ground. I don't have a schematic but I've can't see how direct grounding would be done in a circuit for volume control. PL
:::
::::::Doug:
::::
::::When I reconnect the control it reduces the volume to an almost inaudible level. Advancing the wiper does nothing to increase the volume. If completely disconnected the volume is very loud.
::::
::::I did check the ohms by advancing the wiper and it steadily increased from near zero to 390 ohms. I could only do that by connecting the ohm meter to the first and middle lug of the volume control. If I connected the meter to the first and third lug it reads 390 ohms regardless of the position of the wiper. The center lug appears to be the ground connection. Any thoughts?
::::
::::Thanks. Al
::::
::::
::::
::::
::::Al, I'm a little confused by your statement that the volume control decreases the volume, but doesn't increase it. Can you clarify that?
::::::
::::::
:::::::Hi: I have a Radiola 60 that sounds great except for the volumne control. I located a parts control that is original to a Radiola. It is wirewound and tests at 480 ohms which is close to what it should be. I cleaned it and put it into the radio but it is not working properly. It had oxidized but appeared to clean up nicely and it was still showing the correct ohms but when it was put in it did reduce the volumne but it will not increase it. Any suggestions on where to look? I thought about rewiding it and was wanting to know what guage might be appropriate (looks like 34). I'm also guessing this would be regular wire and not the lacquered type found on coils. Thanks for any suggestions. Al
I checked the divider resistors and they all have ohm readings close to where they should be. Just for kicks I tried to pick up a reading on the 1.0 cap that in the circut. I didn't get a reading at all. I understand the meter should move and then drop back but in this case it didn't move at all. I didn't attempt to change out any of the condensors since it was playing well with no hum. I should have read the latest post on testing and replacing caps. In any event would this be a possible problem in the volume control. I didn't take the cap out of the circuit for testing which may be part of the problem with the meter not reading it.
Thanks. Al
:Al, while you are waiting for your new pot to show up check the other four resistors that are in that voltage divider connector to the control, there are four sections. If anyone of them is open your tube bias points will be off through out the radio and that could cause your volume problems.
:Greg
:
:::I checked the right terminal of the pot and the ohm meter was all over the place. I've ordered a 500 ohm substitute to see if that will cure the problem. Thanks to all for some helpful test procedures and websites. You guys are the best.
::
::Al
::
::Planigan,
:::
:::Here is the schematic for the Radiola 60:
:::
:::http://www.nostalgiaair.org/PagesByModel/337/M0040337.pdf
:::
:::Radiodoc
:::
:::
:::: Al, from what your saying the pot, if its supposed to be 390 ohms, seems to be working correctly. You should get the varying ohm reading between either end and the center terminal. If you only get the varying reading from one end to the center then the pot has to be repaired. Each end terminal must connect to the resistance path in the pot. When placed in the circuit I do not believe the center terminal(wiper) should go directly to ground. I don't have a schematic but I've can't see how direct grounding would be done in a circuit for volume control. PL
::::
:::::::Doug:
:::::
:::::When I reconnect the control it reduces the volume to an almost inaudible level. Advancing the wiper does nothing to increase the volume. If completely disconnected the volume is very loud.
:::::
:::::I did check the ohms by advancing the wiper and it steadily increased from near zero to 390 ohms. I could only do that by connecting the ohm meter to the first and middle lug of the volume control. If I connected the meter to the first and third lug it reads 390 ohms regardless of the position of the wiper. The center lug appears to be the ground connection. Any thoughts?
:::::
:::::Thanks. Al
:::::
:::::
:::::
:::::
:::::Al, I'm a little confused by your statement that the volume control decreases the volume, but doesn't increase it. Can you clarify that?
:::::::
:::::::
::::::::Hi: I have a Radiola 60 that sounds great except for the volumne control. I located a parts control that is original to a Radiola. It is wirewound and tests at 480 ohms which is close to what it should be. I cleaned it and put it into the radio but it is not working properly. It had oxidized but appeared to clean up nicely and it was still showing the correct ohms but when it was put in it did reduce the volumne but it will not increase it. Any suggestions on where to look? I thought about rewiding it and was wanting to know what guage might be appropriate (looks like 34). I'm also guessing this would be regular wire and not the lacquered type found on coils. Thanks for any suggestions. Al
:Greg:
:
:I checked the divider resistors and they all have ohm readings close to where they should be. Just for kicks I tried to pick up a reading on the 1.0 cap that in the circut. I didn't get a reading at all. I understand the meter should move and then drop back but in this case it didn't move at all. I didn't attempt to change out any of the condensors since it was playing well with no hum. I should have read the latest post on testing and replacing caps. In any event would this be a possible problem in the volume control. I didn't take the cap out of the circuit for testing which may be part of the problem with the meter not reading it.
:
:Thanks. Al
:
::Al, while you are waiting for your new pot to show up check the other four resistors that are in that voltage divider connector to the control, there are four sections. If anyone of them is open your tube bias points will be off through out the radio and that could cause your volume problems.
::Greg
::
::::I checked the right terminal of the pot and the ohm meter was all over the place. I've ordered a 500 ohm substitute to see if that will cure the problem. Thanks to all for some helpful test procedures and websites. You guys are the best.
:::
:::Al
:::
:::Planigan,
::::
::::Here is the schematic for the Radiola 60:
::::
::::http://www.nostalgiaair.org/PagesByModel/337/M0040337.pdf
::::
::::Radiodoc
::::
::::
::::: Al, from what your saying the pot, if its supposed to be 390 ohms, seems to be working correctly. You should get the varying ohm reading between either end and the center terminal. If you only get the varying reading from one end to the center then the pot has to be repaired. Each end terminal must connect to the resistance path in the pot. When placed in the circuit I do not believe the center terminal(wiper) should go directly to ground. I don't have a schematic but I've can't see how direct grounding would be done in a circuit for volume control. PL
:::::
::::::::Doug:
::::::
::::::When I reconnect the control it reduces the volume to an almost inaudible level. Advancing the wiper does nothing to increase the volume. If completely disconnected the volume is very loud.
::::::
::::::I did check the ohms by advancing the wiper and it steadily increased from near zero to 390 ohms. I could only do that by connecting the ohm meter to the first and middle lug of the volume control. If I connected the meter to the first and third lug it reads 390 ohms regardless of the position of the wiper. The center lug appears to be the ground connection. Any thoughts?
::::::
::::::Thanks. Al
::::::
::::::
::::::
::::::
::::::Al, I'm a little confused by your statement that the volume control decreases the volume, but doesn't increase it. Can you clarify that?
::::::::
::::::::
:::::::::Hi: I have a Radiola 60 that sounds great except for the volumne control. I located a parts control that is original to a Radiola. It is wirewound and tests at 480 ohms which is close to what it should be. I cleaned it and put it into the radio but it is not working properly. It had oxidized but appeared to clean up nicely and it was still showing the correct ohms but when it was put in it did reduce the volumne but it will not increase it. Any suggestions on where to look? I thought about rewiding it and was wanting to know what guage might be appropriate (looks like 34). I'm also guessing this would be regular wire and not the lacquered type found on coils. Thanks for any suggestions. Al
Al
It sure wounldnt hurt to change it out.
:Greg
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::Greg:
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::I checked the divider resistors and they all have ohm readings close to where they should be. Just for kicks I tried to pick up a reading on the 1.0 cap that in the circut. I didn't get a reading at all. I understand the meter should move and then drop back but in this case it didn't move at all. I didn't attempt to change out any of the condensors since it was playing well with no hum. I should have read the latest post on testing and replacing caps. In any event would this be a possible problem in the volume control. I didn't take the cap out of the circuit for testing which may be part of the problem with the meter not reading it.
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::Thanks. Al
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:::Al, while you are waiting for your new pot to show up check the other four resistors that are in that voltage divider connector to the control, there are four sections. If anyone of them is open your tube bias points will be off through out the radio and that could cause your volume problems.
:::Greg
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:::::I checked the right terminal of the pot and the ohm meter was all over the place. I've ordered a 500 ohm substitute to see if that will cure the problem. Thanks to all for some helpful test procedures and websites. You guys are the best.
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::::Al
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::::Planigan,
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:::::Here is the schematic for the Radiola 60:
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:::::http://www.nostalgiaair.org/PagesByModel/337/M0040337.pdf
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:::::Radiodoc
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:::::: Al, from what your saying the pot, if its supposed to be 390 ohms, seems to be working correctly. You should get the varying ohm reading between either end and the center terminal. If you only get the varying reading from one end to the center then the pot has to be repaired. Each end terminal must connect to the resistance path in the pot. When placed in the circuit I do not believe the center terminal(wiper) should go directly to ground. I don't have a schematic but I've can't see how direct grounding would be done in a circuit for volume control. PL
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:::::::::Doug:
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:::::::When I reconnect the control it reduces the volume to an almost inaudible level. Advancing the wiper does nothing to increase the volume. If completely disconnected the volume is very loud.
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:::::::I did check the ohms by advancing the wiper and it steadily increased from near zero to 390 ohms. I could only do that by connecting the ohm meter to the first and middle lug of the volume control. If I connected the meter to the first and third lug it reads 390 ohms regardless of the position of the wiper. The center lug appears to be the ground connection. Any thoughts?
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:::::::Thanks. Al
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:::::::Al, I'm a little confused by your statement that the volume control decreases the volume, but doesn't increase it. Can you clarify that?
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::::::::::Hi: I have a Radiola 60 that sounds great except for the volumne control. I located a parts control that is original to a Radiola. It is wirewound and tests at 480 ohms which is close to what it should be. I cleaned it and put it into the radio but it is not working properly. It had oxidized but appeared to clean up nicely and it was still showing the correct ohms but when it was put in it did reduce the volumne but it will not increase it. Any suggestions on where to look? I thought about rewiding it and was wanting to know what guage might be appropriate (looks like 34). I'm also guessing this would be regular wire and not the lacquered type found on coils. Thanks for any suggestions. Al