Any help?
Gary
:That sometimes happens. The polarity on your 6 volt vibrator type car radio does not matter. It will need a 6 volt 7 Amp power supply. If your going to put it into a converted 12 volt system, change all the tubes to 12 volt and vibrator 12 volt. If solid state vibrator is used that must be then for 12 Volt Negative ground. The other option is an all stock radio with 12 to 6 volt dropping resistor.
:
You are correct as the secondary of the transformer would be double isf12 volts were applied. I am aware of that and will build a regulator to provide 6 volts from the 12 car battery. My main concern is if I can run the radio on a negative ground. It appears that I can if the two .5umf (c56 & c61) are electrolytics. They are metal cans which are bolted to the chassis. The marking on the caps are .5mfd 200v so it is unlikely they are electrolytics. Haven't been able to find any thing so far on the caps on the net. Sure wish I could be sure that they are not polarized caps.
Thanks to you guys for getting back to me. Was afraid I had lost the link.
Also I see I will need to do some scrounging as I don't presently have a powerful enough supply to run the radio!
Gary
:If 12 volts is applied with a 12 volt vibrator and 12 volt tubes, what keeps the secondary, (B+) winding from having double voltage. Changing to a 12 volt vibrator will not change the primary of the transformer from getting 12 volts instead of 6, hence, doubling the output voltage. Or am I missing something ?
:
:
::That sometimes happens. The polarity on your 6 volt vibrator type car radio does not matter. It will need a 6 volt 7 Amp power supply. If your going to put it into a converted 12 volt system, change all the tubes to 12 volt and vibrator 12 volt. If solid state vibrator is used that must be then for 12 Volt Negative ground. The other option is an all stock radio with 12 to 6 volt dropping resistor.
::
:
:
:Bob;
:
:You are correct as the secondary of the transformer would be double if 12 volts were applied. I am aware of that and will build a regulator to provide 6 volts from the 12 car battery. My main concern is if I can run the radio on a negative ground. It appears that I can if the two .5umf (c56 & c61) are "edit NOT" electrolytics. They are metal cans which are bolted to the chassis. The marking on the caps are .5mfd 200v so it is unlikely they are electrolytics. Haven't been able to find any thing so far on the caps on the net. Sure wish I could be sure that they are not polarized caps.
:
:Thanks to you guys for getting back to me. Was afraid I had lost the link.
:
:Also I see I will need to do some scrounging as I don't presently have a powerful enough supply to run the radio!
:
:Gary
:
:
::If 12 volts is applied with a 12 volt vibrator and 12 volt tubes, what keeps the secondary, (B+) winding from having double voltage. Changing to a 12 volt vibrator will not change the primary of the transformer from getting 12 volts instead of 6, hence, doubling the output voltage. Or am I missing something ?
::
::
:::That sometimes happens. The polarity on your 6 volt vibrator type car radio does not matter. It will need a 6 volt 7 Amp power supply. If your going to put it into a converted 12 volt system, change all the tubes to 12 volt and vibrator 12 volt. If solid state vibrator is used that must be then for 12 Volt Negative ground. The other option is an all stock radio with 12 to 6 volt dropping resistor.
:::
::
::
:
:
:Had a post on with one response but it seems to have disappeared! Would like to reconnect.
:
:Any help?
:
:Gary
:
:Hi Gary. Looking at the schematic, the positives on the electrolytics go to the cathode of the 84 tube and the negitive of the 8mf goes to front (up stream) side of filter choke, the negative side of 4mf goes to rear (down stream) side of choke The can on that electrolytic has to be isolated from chassis. PL
:
:
::Had a post on with one response but it seems to have disappeared! Would like to reconnect.
::
::Any help?
::
::Gary
::
:
:
:Gary blay that last. There is something about that schematic that I cant figure out. On the 4mf the can connects to the down stream side of the choke coil and then to ground (chassis). Since the can (negative) is common to the two caps (8mf & 4mf)the 4mf going to ground would mean the 8mf also goes to ground and that does not compute. I don't know enough to even guess at this one. PL
:
:
:
:
::Hi Gary. Looking at the schematic, the positives on the electrolytics go to the cathode of the 84 tube and the negitive of the 8mf goes to front (up stream) side of filter choke, the negative side of 4mf goes to rear (down stream) side of choke The can on that electrolytic has to be isolated from chassis. PL
::
::
:::Had a post on with one response but it seems to have disappeared! Would like to reconnect.
:::
:::Any help?
:::
:::Gary
:::
::
::
:
:
Might we assume that the original 8/4 ufd canned electrolytic (Item 67) is still in the set , for electro /mechanical referencing ? |
:PL; You are correct. I checked and the can is definately grounded which means that the choke is shorted.
:
::Gary blay that last. There is something about that schematic that I cant figure out. On the 4mf the can connects to the down stream side of the choke coil and then to ground (chassis). Since the can (negative) is common to the two caps (8mf & 4mf)the 4mf going to ground would mean the 8mf also goes to ground and that does not compute. I don't know enough to even guess at this one. PL :::
::
::
::
:::Hi Gary. Looking at the schematic, the positives on the electrolytics go to the cathode of the 84 tube and the negitive of the 8mf goes to front (up stream) side of filter choke, the negative side of 4mf goes to rear (down stream) side of choke The can on that electrolytic has to be isolated from chassis. PL
:::
::::Had a post on with one response but it seems to have disappeared! Would like to reconnect.
::::
::::Any help?
::::
::::Gary
::::
:::
:::
::
::
:
:
Still wondering about the two .5 mfd cps on the primary side of the transformer and vibrator. I realy think they have to be NON electrolytics.
Thanks
Gary
:
:
:
:
:
:
:
:
:
:
:
:
:
:Sir Gary . . . . .
:
:
:
:Might we assume that the original 8/4 ufd canned electrolytic (Item 67) is still in the set , for electro /mechanical referencing ?
:
:
:If so, that unit must have been different from the norm, in the respect of the screw in cans shell and ground which would be the sole negative connection for the 4 ufd capacitor.
:
:
:And then, both of the 4 and 8 ufd + connections are connected to one of the terminals on the insulated end of the capacitor.
:
:
:That then leaves the negative connection of the 8 ufd unit to be connected to the second terminal on the insulated end of the can. Look at the physical layout of the chassis which the draftsman has made oner to the right of the schema..
:
:
:Now, over there you will see the (Item 35) resistor coming, over and connecting to that last teminal in order to acquire its negative grid voltage, which is required by the audio stages 1st grids, from that derived supply node.
:
:
:
:Now. if someone has attempted to use a modern day can in that position . . . with its two common negatives to the can, they would have shorted out that supply source.
:
:
:The very top procedure will have to be the type of wiring procedure , if utilizing two electrolytics, in case you want to restuff the "turkey" .
:
:
:
:
:
:
:
:
:
:73's de Edd
:
:
:
:
:
:
:
:
::PL; You are correct. I checked and the can is definately grounded which means that the choke is shorted.
::
:
:
:
:::Gary blay that last. There is something about that schematic that I cant figure out. On the 4mf the can connects to the down stream side of the choke coil and then to ground (chassis). Since the can (negative) is common to the two caps (8mf & 4mf)the 4mf going to ground would mean the 8mf also goes to ground and that does not compute. I don't know enough to even guess at this one. PL
:::
:::
:
:::
::::Hi Gary. Looking at the schematic, the positives on the electrolytics go to the cathode of the 84 tube and the negitive of the 8mf goes to front (up stream) side of filter choke, the negative side of 4mf goes to rear (down stream) side of choke The can on that electrolytic has to be isolated from chassis. PL
::::
:
:
:
::::
:::::Had a post on with one response but it seems to have disappeared! Would like to reconnect.
:::::
:::::Any help?
:::::
:::::Gary
:::::
::::
::::
:::
:::
::
::
:
:
Lookee . . . . same-same as: . . . . . |
:Edd; The original 4/8 mfd can is in the unit. I see now how that works as you expained.
:
:Still wondering about the two .5 mfd cps on the primary side of the transformer and vibrator. I realy think they have to be NON electrolytics.
:
:Thanks
:
:Gary
:
::
::
::
::
::
::
::
::
::
::
::
::
::
::Sir Gary . . . . .
::
::
::
::Might we assume that the original 8/4 ufd canned electrolytic (Item 67) is still in the set , for electro /mechanical referencing ?
::
::
::If so, that unit must have been different from the norm, in the respect of the screw in cans shell and ground which would be the sole negative connection for the 4 ufd capacitor.
::
::
::And then, both of the 4 and 8 ufd + connections are connected to one of the terminals on the insulated end of the capacitor.
::
::
::That then leaves the negative connection of the 8 ufd unit to be connected to the second terminal on the insulated end of the can. Look at the physical layout of the chassis which the draftsman has made oner to the right of the schema..
::
::
::Now, over there you will see the (Item 35) resistor coming, over and connecting to that last teminal in order to acquire its negative grid voltage, which is required by the audio stages 1st grids, from that derived supply node.
::
::
::
::Now. if someone has attempted to use a modern day can in that position . . . with its two common negatives to the can, they would have shorted out that supply source.
::
::
::The very top procedure will have to be the type of wiring procedure , if utilizing two electrolytics, in case you want to restuff the "turkey" .
::
::
::
::
::
::
::
::
::
::73's de Edd
::
::
::
::
::
::
::
::
:::PL; You are correct. I checked and the can is definately grounded which means that the choke is shorted.
:::
::
::
::
::::Gary blay that last. There is something about that schematic that I cant figure out. On the 4mf the can connects to the down stream side of the choke coil and then to ground (chassis). Since the can (negative) is common to the two caps (8mf & 4mf)the 4mf going to ground would mean the 8mf also goes to ground and that does not compute. I don't know enough to even guess at this one. PL
::::
::::
::
::::
:::::Hi Gary. Looking at the schematic, the positives on the electrolytics go to the cathode of the 84 tube and the negitive of the 8mf goes to front (up stream) side of filter choke, the negative side of 4mf goes to rear (down stream) side of choke The can on that electrolytic has to be isolated from chassis. PL
:::::
::
::
::
:::::
::::::Had a post on with one response but it seems to have disappeared! Would like to reconnect.
::::::
::::::Any help?
::::::
::::::Gary
::::::
:::::
:::::
::::
::::
:::
:::
::
::
:
:
Yep same as the third one down on you examples.
Just as I suspected! Thanks
Gary
:
:
:
:
:
:
:
:
:
:
:
:
:
:Sir Gary. . . . .
:
:
:
:
:
:
:Ext-WEEEEEM-ely common to see metal cylindrical housed DC line input "hash" filters in that configuration as
:being used on older auto-mo-bubble receivers .
:
:
:With them being common paper units . . . with no polarity aspect considerations, of course.
:
:
:
:Lookee . . . . same-same as: . . . . .
:
:
:
:
:
:
:
:
:
:
:
:73's de Edd
:
:
:
:
:
:
:
:
:
:
::Edd; The original 4/8 mfd can is in the unit. I see now how that works as you expained.
::
::Still wondering about the two .5 mfd cps on the primary side of the transformer and vibrator. I realy think they have to be NON electrolytics.
::
::Thanks
::
::Gary
::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::Sir Gary . . . . .
:::
:::
:::
:::Might we assume that the original 8/4 ufd canned electrolytic (Item 67) is still in the set , for electro /mechanical referencing ?
:::
:::
:::If so, that unit must have been different from the norm, in the respect of the screw in cans shell and ground which would be the sole negative connection for the 4 ufd capacitor.
:::
:::
:::And then, both of the 4 and 8 ufd + connections are connected to one of the terminals on the insulated end of the capacitor.
:::
:::
:::That then leaves the negative connection of the 8 ufd unit to be connected to the second terminal on the insulated end of the can. Look at the physical layout of the chassis which the draftsman has made oner to the right of the schema..
:::
:::
:::Now, over there you will see the (Item 35) resistor coming, over and connecting to that last teminal in order to acquire its negative grid voltage, which is required by the audio stages 1st grids, from that derived supply node.
:::
:::
:::
:::Now. if someone has attempted to use a modern day can in that position . . . with its two common negatives to the can, they would have shorted out that supply source.
:::
:::
:::The very top procedure will have to be the type of wiring procedure , if utilizing two electrolytics, in case you want to restuff the "turkey" .
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::73's de Edd
:::
:::
:::
:::
:::
:::
:::
:::
::::PL; You are correct. I checked and the can is definately grounded which means that the choke is shorted.
::::
:::
:::
:::
:::::Gary blay that last. There is something about that schematic that I cant figure out. On the 4mf the can connects to the down stream side of the choke coil and then to ground (chassis). Since the can (negative) is common to the two caps (8mf & 4mf)the 4mf going to ground would mean the 8mf also goes to ground and that does not compute. I don't know enough to even guess at this one. PL
:::::
:::::
:::
:::::
::::::Hi Gary. Looking at the schematic, the positives on the electrolytics go to the cathode of the 84 tube and the negitive of the 8mf goes to front (up stream) side of filter choke, the negative side of 4mf goes to rear (down stream) side of choke The can on that electrolytic has to be isolated from chassis. PL
::::::
:::
:::
:::
::::::
:::::::Had a post on with one response but it seems to have disappeared! Would like to reconnect.
:::::::
:::::::Any help?
:::::::
:::::::Gary
:::::::
::::::
::::::
:::::
:::::
::::
::::
:::
:::
::
::
:
:
Yep same as the third one down on you examples.
Just as I suspected! Thanks
Gary
:
:
:
:
:
:
:
:
:
:
:
:
:
:Sir Gary. . . . .
:
:
:
:
:
:
:Ext-WEEEEEM-ely common to see metal cylindrical housed DC line input "hash" filters in that configuration as
:being used on older auto-mo-bubble receivers .
:
:
:With them being common paper units . . . with no polarity aspect considerations, of course.
:
:
:
:Lookee . . . . same-same as: . . . . .
:
:
:
:
:
:
:
:
:
:
:
:73's de Edd
:
:
:
:
:
:
:
:
:
:
::Edd; The original 4/8 mfd can is in the unit. I see now how that works as you expained.
::
::Still wondering about the two .5 mfd cps on the primary side of the transformer and vibrator. I realy think they have to be NON electrolytics.
::
::Thanks
::
::Gary
::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::Sir Gary . . . . .
:::
:::
:::
:::Might we assume that the original 8/4 ufd canned electrolytic (Item 67) is still in the set , for electro /mechanical referencing ?
:::
:::
:::If so, that unit must have been different from the norm, in the respect of the screw in cans shell and ground which would be the sole negative connection for the 4 ufd capacitor.
:::
:::
:::And then, both of the 4 and 8 ufd + connections are connected to one of the terminals on the insulated end of the capacitor.
:::
:::
:::That then leaves the negative connection of the 8 ufd unit to be connected to the second terminal on the insulated end of the can. Look at the physical layout of the chassis which the draftsman has made oner to the right of the schema..
:::
:::
:::Now, over there you will see the (Item 35) resistor coming, over and connecting to that last teminal in order to acquire its negative grid voltage, which is required by the audio stages 1st grids, from that derived supply node.
:::
:::
:::
:::Now. if someone has attempted to use a modern day can in that position . . . with its two common negatives to the can, they would have shorted out that supply source.
:::
:::
:::The very top procedure will have to be the type of wiring procedure , if utilizing two electrolytics, in case you want to restuff the "turkey" .
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::73's de Edd
:::
:::
:::
:::
:::
:::
:::
:::
::::PL; You are correct. I checked and the can is definately grounded which means that the choke is shorted.
::::
:::
:::
:::
:::::Gary blay that last. There is something about that schematic that I cant figure out. On the 4mf the can connects to the down stream side of the choke coil and then to ground (chassis). Since the can (negative) is common to the two caps (8mf & 4mf)the 4mf going to ground would mean the 8mf also goes to ground and that does not compute. I don't know enough to even guess at this one. PL
:::::
:::::
:::
:::::
::::::Hi Gary. Looking at the schematic, the positives on the electrolytics go to the cathode of the 84 tube and the negitive of the 8mf goes to front (up stream) side of filter choke, the negative side of 4mf goes to rear (down stream) side of choke The can on that electrolytic has to be isolated from chassis. PL
::::::
:::
:::
:::
::::::
:::::::Had a post on with one response but it seems to have disappeared! Would like to reconnect.
:::::::
:::::::Any help?
:::::::
:::::::Gary
:::::::
::::::
::::::
:::::
:::::
::::
::::
:::
:::
::
::
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:Sir Gary . . . . .
:
:
:
:Might we assume that the original 8/4 ufd canned electrolytic (Item 67) is still in the set , for electro /mechanical referencing ?
:
:
:If so, that unit must have been different from the norm, in the respect of the screw in cans shell and ground which would be the sole negative connection for the 4 ufd capacitor.
:
:
:And then, both of the 4 and 8 ufd + connections are connected to one of the terminals on the insulated end of the capacitor.
:
:
:That then leaves the negative connection of the 8 ufd unit to be connected to the second terminal on the insulated end of the can. Look at the physical layout of the chassis which the draftsman has made oner to the right of the schema..
:
:
:Now, over there you will see the (Item 35) resistor coming, over and connecting to that last teminal in order to acquire its negative grid voltage, which is required by the audio stages 1st grids, from that derived supply node.
:
:
:
:Now. if someone has attempted to use a modern day can in that position . . . with its two common negatives to the can, they would have shorted out that supply source.
:
:
:The very top procedure will have to be the type of wiring procedure , if utilizing two electrolytics, in case you want to restuff the "turkey" .
:
:
:
:
:
:
:
:
:
:73's de Edd
:
:
:
:
:
:
:
:
::PL; You are correct. I checked and the can is definately grounded which means that the choke is shorted.
::
:
:
:
:::Gary blay that last. There is something about that schematic that I cant figure out. On the 4mf the can connects to the down stream side of the choke coil and then to ground (chassis). Since the can (negative) is common to the two caps (8mf & 4mf)the 4mf going to ground would mean the 8mf also goes to ground and that does not compute. I don't know enough to even guess at this one. PL
:::
:::
:
:::
::::Hi Gary. Looking at the schematic, the positives on the electrolytics go to the cathode of the 84 tube and the negitive of the 8mf goes to front (up stream) side of filter choke, the negative side of 4mf goes to rear (down stream) side of choke The can on that electrolytic has to be isolated from chassis. PL
::::
:
:
:
::::
:::::Had a post on with one response but it seems to have disappeared! Would like to reconnect.
:::::
:::::Any help?
:::::
:::::Gary
:::::
::::
::::
:::
:::
::
::
:
:
Make sense?
Gary
:Edd, I'm confused with this. The can is the negative for both 4 & 8 mf, I don't see how you can seperate the negatives. Since in the pictorial there are only two terminals on the insolated end of the can (+ for 4 & 8mf)where is the second negative for the 8mf? PL
:
:
::
::
::
::
::
::
::
::
::
::
::
::
::
::Sir Gary . . . . .
::
::
::
::Might we assume that the original 8/4 ufd canned electrolytic (Item 67) is still in the set , for electro /mechanical referencing ?
::
::
::If so, that unit must have been different from the norm, in the respect of the screw in cans shell and ground which would be the sole negative connection for the 4 ufd capacitor.
::
::
::And then, both of the 4 and 8 ufd + connections are connected to one of the terminals on the insulated end of the capacitor.
::
::
::That then leaves the negative connection of the 8 ufd unit to be connected to the second terminal on the insulated end of the can. Look at the physical layout of the chassis which the draftsman has made oner to the right of the schema..
::
::
::Now, over there you will see the (Item 35) resistor coming, over and connecting to that last teminal in order to acquire its negative grid voltage, which is required by the audio stages 1st grids, from that derived supply node.
::
::
::
::Now. if someone has attempted to use a modern day can in that position . . . with its two common negatives to the can, they would have shorted out that supply source.
::
::
::The very top procedure will have to be the type of wiring procedure , if utilizing two electrolytics, in case you want to restuff the "turkey" .
::
::
::
::
::
::
::
::
::
::73's de Edd
::
::
::
::
::
::
::
::
:::PL; You are correct. I checked and the can is definately grounded which means that the choke is shorted.
:::
::
::
::
::::Gary blay that last. There is something about that schematic that I cant figure out. On the 4mf the can connects to the down stream side of the choke coil and then to ground (chassis). Since the can (negative) is common to the two caps (8mf & 4mf)the 4mf going to ground would mean the 8mf also goes to ground and that does not compute. I don't know enough to even guess at this one. PL
::::
::::
::
::::
:::::Hi Gary. Looking at the schematic, the positives on the electrolytics go to the cathode of the 84 tube and the negitive of the 8mf goes to front (up stream) side of filter choke, the negative side of 4mf goes to rear (down stream) side of choke The can on that electrolytic has to be isolated from chassis. PL
:::::
::
::
::
:::::
::::::Had a post on with one response but it seems to have disappeared! Would like to reconnect.
::::::
::::::Any help?
::::::
::::::Gary
::::::
:::::
:::::
::::
::::
:::
:::
::
::
:
:
:
:Make sense?
:
:Gary
:
::Edd, I'm confused with this. The can is the negative for both 4 & 8 mf, I don't see how you can seperate the negatives. Since in the pictorial there are only two terminals on the insolated end of the can (+ for 4 & 8mf)where is the second negative for the 8mf? PL
::
::
:::
:::
::: ::: ::: ::: ::: ::: ::: ::: ::: ::: ::: :::Sir Gary . . . . . ::: ::: ::: :::Might we assume that the original 8/4 ufd canned electrolytic (Item 67) is still in the set , for electro /mechanical referencing ? ::: ::: :::If so, that unit must have been different from the norm, in the respect of the screw in cans shell and ground which would be the sole negative connection for the 4 ufd capacitor. ::: ::: :::And then, both of the 4 and 8 ufd + connections are connected to one of the terminals on the insulated end of the capacitor. ::: ::: :::That then leaves the negative connection of the 8 ufd unit to be connected to the second terminal on the insulated end of the can. Look at the physical layout of the chassis which the draftsman has made oner to the right of the schema.. ::: ::: :::Now, over there you will see the (Item 35) resistor coming, over and connecting to that last teminal in order to acquire its negative grid voltage, which is required by the audio stages 1st grids, from that derived supply node. ::: ::: ::: :::Now. if someone has attempted to use a modern day can in that position . . . with its two common negatives to the can, they would have shorted out that supply source. ::: ::: :::The very top procedure will have to be the type of wiring procedure , if utilizing two electrolytics, in case you want to restuff the "turkey" . ::: ::: ::: ::: ::: ::: ::: ::: ::: :::73's de Edd ::: ::: ::: ::: |
:::
:::
:::
:::
::::PL; You are correct. I checked and the can is definately grounded which means that the choke is shorted.
::::
:::
:::
:::
:::::Gary blay that last. There is something about that schematic that I cant figure out. On the 4mf the can connects to the down stream side of the choke coil and then to ground (chassis). Since the can (negative) is common to the two caps (8mf & 4mf)the 4mf going to ground would mean the 8mf also goes to ground and that does not compute. I don't know enough to even guess at this one. PL
:::::
:::::
:::
:::::
::::::Hi Gary. Looking at the schematic, the positives on the electrolytics go to the cathode of the 84 tube and the negitive of the 8mf goes to front (up stream) side of filter choke, the negative side of 4mf goes to rear (down stream) side of choke The can on that electrolytic has to be isolated from chassis. PL
::::::
:::
:::
:::
::::::
:::::::Had a post on with one response but it seems to have disappeared! Would like to reconnect.
:::::::
:::::::Any help?
:::::::
:::::::Gary
:::::::
::::::
::::::
:::::
:::::
::::
::::
:::
:::
::
::
:
:
Looking back at Edd's post I just repeated what he said!!!
Oh well it is early in the morning!
Gary
::PLANIGAN; My guess is that the positive ends of the 4 & 8 mf caps are both tied to one terminal. The negative end of the 4 mf is tied to the can/ground. The negative end of the 8 mf is then tied to the other terminal. This then would let the negative end of the 8 mf generate a negatuve voltage for the grid.
::
::Make sense?
::
::Gary
::
:::Edd, I'm confused with this. The can is the negative for both 4 & 8 mf, I don't see how you can seperate the negatives. Since in the pictorial there are only two terminals on the insolated end of the can (+ for 4 & 8mf)where is the second negative for the 8mf? PL
:::
:::
::::
::::
::::
::::
::::
::::
::::
::::
::::
::::
::::
::::
::::
::::Sir Gary . . . . .
::::
::::
::::
::::Might we assume that the original 8/4 ufd canned electrolytic (Item 67) is still in the set , for electro /mechanical referencing ?
::::
::::
::::If so, that unit must have been different from the norm, in the respect of the screw in cans shell and ground which would be the sole negative connection for the 4 ufd capacitor.
::::
::::
::::And then, both of the 4 and 8 ufd + connections are connected to one of the terminals on the insulated end of the capacitor.
::::
::::
::::That then leaves the negative connection of the 8 ufd unit to be connected to the second terminal on the insulated end of the can. Look at the physical layout of the chassis which the draftsman has made oner to the right of the schema..
::::
::::
::::Now, over there you will see the (Item 35) resistor coming, over and connecting to that last teminal in order to acquire its negative grid voltage, which is required by the audio stages 1st grids, from that derived supply node.
::::
::::
::::
::::Now. if someone has attempted to use a modern day can in that position . . . with its two common negatives to the can, they would have shorted out that supply source.
::::
::::
::::The very top procedure will have to be the type of wiring procedure , if utilizing two electrolytics, in case you want to restuff the "turkey" .
::::
::::
::::
::::
::::
::::
::::
::::
::::
::::73's de Edd
::::
::::
::::
::::
::::
::::
::::
::::
:::::PL; You are correct. I checked and the can is definately grounded which means that the choke is shorted.
:::::
::::
::::
::::
::::::Gary blay that last. There is something about that schematic that I cant figure out. On the 4mf the can connects to the down stream side of the choke coil and then to ground (chassis). Since the can (negative) is common to the two caps (8mf & 4mf)the 4mf going to ground would mean the 8mf also goes to ground and that does not compute. I don't know enough to even guess at this one. PL
::::::
::::::
::::
::::::
:::::::Hi Gary. Looking at the schematic, the positives on the electrolytics go to the cathode of the 84 tube and the negitive of the 8mf goes to front (up stream) side of filter choke, the negative side of 4mf goes to rear (down stream) side of choke The can on that electrolytic has to be isolated from chassis. PL
:::::::
::::
::::
::::
:::::::
::::::::Had a post on with one response but it seems to have disappeared! Would like to reconnect.
::::::::
::::::::Any help?
::::::::
::::::::Gary
::::::::
:::::::
:::::::
::::::
::::::
:::::
:::::
::::
::::
:::
:::
::
::
:
: