When I turned on the radio today it refuses to play loud. The sound is good but if you try to turn it up it distorts but won't get loud. All B+ voltages are good. Where should I look? I replaced all paper and electrolytic capacitors. Nothing is touching that shouldn't. This is very odd. It would be odd that the 1J6 is failing.
Please help if you can.
Thanks,
Dave
I tested the 1J6 on my SECO model 107 tube tester and it tests very very weak. It's maybe up to 3%. But I don't have another one to try. So I have to order one.
It WAS playing ok last night, so I suspect that one of the old resistors failed. Also I see 210 volts on each plate. Is that too high?
Thanks,
Dave
:Hello All,
: When I turned on the radio today it refuses to play loud. The sound is good but if you try to turn it up it distorts but won't get loud. All B+ voltages are good. Where should I look? I replaced all paper and electrolytic capacitors. Nothing is touching that shouldn't. This is very odd. It would be odd that the 1J6 is failing.
:
: Please help if you can.
:
:Thanks,
:
:Dave
:
1J6 is unusual in some ways. It can operate with zero grid bias. With some bias it draws little current. When you are testing the tube be sure filament is 2 volts.
1J6 is rated to 135 volts. You might be reading higher voltage because the 1J6 isn't drawing hardly any current? See if voltage is lower with a new tube. I have some here if you have a hard time getting a 1J6.
http://frank.pocnet.net/sheets/084/1/1J6G.pdf
Norm
:Hello Again All,
: I tested the 1J6 on my SECO model 107 tube tester and it tests very very weak. It's maybe up to 3%. But I don't have another one to try. So I have to order one.
: It WAS playing ok last night, so I suspect that one of the old resistors failed. Also I see 210 volts on each plate. Is that too high?
:
:Thanks,
:
:Dave
::Hello All,
:: When I turned on the radio today it refuses to play loud. The sound is good but if you try to turn it up it distorts but won't get loud. All B+ voltages are good. Where should I look? I replaced all paper and electrolytic capacitors. Nothing is touching that shouldn't. This is very odd. It would be odd that the 1J6 is failing.
::
:: Please help if you can.
::
::Thanks,
::
::Dave
::
:
:
My tube tester says 1 volt and seecial tube type B. I don't want to damage the filament. I could use a 1J6 to try.
Ok, I'll try setting the tube tester to 2.
Thanks,
Dave
:Dave
:
: 1J6 is unusual in some ways. It can operate with zero grid bias. With some bias it draws little current. When you are testing the tube be sure filament is 2 volts.
:
: 1J6 is rated to 135 volts. You might be reading higher voltage because the 1J6 isn't drawing hardly any current? See if voltage is lower with a new tube. I have some here if you have a hard time getting a 1J6.
:
: http://frank.pocnet.net/sheets/084/1/1J6G.pdf
:
:Norm
:
::Hello Again All,
:: I tested the 1J6 on my SECO model 107 tube tester and it tests very very weak. It's maybe up to 3%. But I don't have another one to try. So I have to order one.
:: It WAS playing ok last night, so I suspect that one of the old resistors failed. Also I see 210 volts on each plate. Is that too high?
::
::Thanks,
::
::Dave
:::Hello All,
::: When I turned on the radio today it refuses to play loud. The sound is good but if you try to turn it up it distorts but won't get loud. All B+ voltages are good. Where should I look? I replaced all paper and electrolytic capacitors. Nothing is touching that shouldn't. This is very odd. It would be odd that the 1J6 is failing.
:::
::: Please help if you can.
:::
:::Thanks,
:::
:::Dave
:::
::
::
:
:
When I set the filament to 2 volts, the tube tester said it was a good tube. So maybe there's some problem in the filament circuit like the dropping resistors. Maybe something else I didn't think of.
Thanks,
Dave
:Norm,
: My tube tester says 1 volt and seecial tube type B. I don't want to damage the filament. I could use a 1J6 to try.
: Ok, I'll try setting the tube tester to 2.
:
:Thanks,
:
:Dave
::Dave
::
:: 1J6 is unusual in some ways. It can operate with zero grid bias. With some bias it draws little current. When you are testing the tube be sure filament is 2 volts.
::
:: 1J6 is rated to 135 volts. You might be reading higher voltage because the 1J6 isn't drawing hardly any current? See if voltage is lower with a new tube. I have some here if you have a hard time getting a 1J6.
::
:: http://frank.pocnet.net/sheets/084/1/1J6G.pdf
::
::Norm
::
:::Hello Again All,
::: I tested the 1J6 on my SECO model 107 tube tester and it tests very very weak. It's maybe up to 3%. But I don't have another one to try. So I have to order one.
::: It WAS playing ok last night, so I suspect that one of the old resistors failed. Also I see 210 volts on each plate. Is that too high?
:::
:::Thanks,
:::
:::Dave
::::Hello All,
:::: When I turned on the radio today it refuses to play loud. The sound is good but if you try to turn it up it distorts but won't get loud. All B+ voltages are good. Where should I look? I replaced all paper and electrolytic capacitors. Nothing is touching that shouldn't. This is very odd. It would be odd that the 1J6 is failing.
::::
:::: Please help if you can.
::::
::::Thanks,
::::
::::Dave
::::
:::
:::
::
::
:
:
I replaced the filament resistors making sure they were both 21 ohms. They are and the filament voltage is 1.36 volts AC. It was working with that voltage yesterday. So it has to be something else.
It still refuses to play loud and clear. It can only play quiet and clear, louder and it will distort.
Thanks,
Dave
:Dave
:
: 1J6 is unusual in some ways. It can operate with zero grid bias. With some bias it draws little current. When you are testing the tube be sure filament is 2 volts.
:
: 1J6 is rated to 135 volts. You might be reading higher voltage because the 1J6 isn't drawing hardly any current? See if voltage is lower with a new tube. I have some here if you have a hard time getting a 1J6.
:
: http://frank.pocnet.net/sheets/084/1/1J6G.pdf
:
:Norm
:
::Hello Again All,
:: I tested the 1J6 on my SECO model 107 tube tester and it tests very very weak. It's maybe up to 3%. But I don't have another one to try. So I have to order one.
:: It WAS playing ok last night, so I suspect that one of the old resistors failed. Also I see 210 volts on each plate. Is that too high?
::
::Thanks,
::
::Dave
:::Hello All,
::: When I turned on the radio today it refuses to play loud. The sound is good but if you try to turn it up it distorts but won't get loud. All B+ voltages are good. Where should I look? I replaced all paper and electrolytic capacitors. Nothing is touching that shouldn't. This is very odd. It would be odd that the 1J6 is failing.
:::
::: Please help if you can.
:::
:::Thanks,
:::
:::Dave
:::
::
::
:
:
73's de Edd
|
::Dave
::
:: 1J6 is unusual in some ways. It can operate with zero grid bias. With some bias it draws little current. When you are testing the tube be sure filament is 2 volts.
::
:: 1J6 is rated to 135 volts. You might be reading higher voltage because the 1J6 isn't drawing hardly any current? See if voltage is lower with a new tube. I have some here if you have a hard time getting a 1J6.
::
:: http://frank.pocnet.net/sheets/084/1/1J6G.pdf
::
::Norm
::
:::Hello Again All,
::: I tested the 1J6 on my SECO model 107 tube tester and it tests very very weak. It's maybe up to 3%. But I don't have another one to try. So I have to order one.
::: It WAS playing ok last night, so I suspect that one of the old resistors failed. Also I see 210 volts on each plate. Is that too high?
:::
:::Thanks,
:::
:::Dave
::::Hello All,
:::: When I turned on the radio today it refuses to play loud. The sound is good but if you try to turn it up it distorts but won't get loud. All B+ voltages are good. Where should I look? I replaced all paper and electrolytic capacitors. Nothing is touching that shouldn't. This is very odd. It would be odd that the 1J6 is failing.
::::
:::: Please help if you can.
::::
::::Thanks,
::::
::::Dave
::::
:::
:::
::
::
:
:
I realized it later after studying the schematic and seeing the 1J6 filament in series with the dial lamps. So now, what I needed was the bulb number. Thanks for the number. 291-292. Where can I find those bulbs?
Thanks,
Dave
:
:
:
:
:
:
:
:
:
:
:
:
:
:Sir Dave . . . . .
:
:
:Back on that shutter-er-er-ing dial thingee . . . glad it was an easy fix . . . and yes, that was just the blanket patent on that mechanism . . .which it seems to have had a mechanical variant used on your PARTICULAR chassis . but I still got a kick out of the detail and clarity of the old style drafting.
:
:
:Don't ever brag on a radios performance . . . . as later on . . . it will think that it can get away with anything.
:
:
:From the time of working on the dial assembly to the present time of the onset of uper volume limitation, is there any chance that you could hacve lost the filament on one (or forbid . . both) of your # 291/292 dial lamps ?
:
:
:As you can see, the AF output filament is dependent of the series drop of the pilot bulb wired above and below it along with the two R18 "balancing" resistors that equalize their voltage drops and current consumptions to equate with the value needed for the central series 1J6
:
:
:
:
:
:Hows about firing ye olde set up again and metering across the 1J6 to see what ACTUAL operational voltage is presently across its filament pins ?
:
:
:Pee Ess . . . . . ( a big Pat on da' back ) . . . . as you always provide frequent and adequate feedback . . . . many times solving your own problems.
:
:
:
:73's de Edd
:
:
:
:
:Prayer: " Oh Lord, give me patience, but give it to me 'RAT NOW ! ".
:
:
:
:
:
:
:
:
:
:
:::Dave
:::
::: 1J6 is unusual in some ways. It can operate with zero grid bias. With some bias it draws little current. When you are testing the tube be sure filament is 2 volts.
:::
::: 1J6 is rated to 135 volts. You might be reading higher voltage because the 1J6 isn't drawing hardly any current? See if voltage is lower with a new tube. I have some here if you have a hard time getting a 1J6.
:::
::: http://frank.pocnet.net/sheets/084/1/1J6G.pdf
:::
:::Norm
:::
::::Hello Again All,
:::: I tested the 1J6 on my SECO model 107 tube tester and it tests very very weak. It's maybe up to 3%. But I don't have another one to try. So I have to order one.
:::: It WAS playing ok last night, so I suspect that one of the old resistors failed. Also I see 210 volts on each plate. Is that too high?
::::
::::Thanks,
::::
::::Dave
:::::Hello All,
::::: When I turned on the radio today it refuses to play loud. The sound is good but if you try to turn it up it distorts but won't get loud. All B+ voltages are good. Where should I look? I replaced all paper and electrolytic capacitors. Nothing is touching that shouldn't. This is very odd. It would be odd that the 1J6 is failing.
:::::
::::: Please help if you can.
:::::
:::::Thanks,
:::::
:::::Dave
:::::
::::
::::
:::
:::
::
::
:
:
Believe bulb 291, bayonet, 292, screw base, is no longer in production but 1490, bayonet base, is available.
Norm
:Edd,
: I realized it later after studying the schematic and seeing the 1J6 filament in series with the dial lamps. So now, what I needed was the bulb number. Thanks for the number. 291-292. Where can I find those bulbs?
:
:Thanks,
:
:Dave
::
::
::
::
::
::
::
::
::
::
::
::
::
::Sir Dave . . . . .
::
::
::Back on that shutter-er-er-ing dial thingee . . . glad it was an easy fix . . . and yes, that was just the blanket patent on that mechanism . . .which it seems to have had a mechanical variant used on your PARTICULAR chassis . but I still got a kick out of the detail and clarity of the old style drafting.
::
::
::Don't ever brag on a radios performance . . . . as later on . . . it will think that it can get away with anything.
::
::
::From the time of working on the dial assembly to the present time of the onset of uper volume limitation, is there any chance that you could hacve lost the filament on one (or forbid . . both) of your # 291/292 dial lamps ?
::
::
::As you can see, the AF output filament is dependent of the series drop of the pilot bulb wired above and below it along with the two R18 "balancing" resistors that equalize their voltage drops and current consumptions to equate with the value needed for the central series 1J6
::
::
::
::
::
::Hows about firing ye olde set up again and metering across the 1J6 to see what ACTUAL operational voltage is presently across its filament pins ?
::
::
::Pee Ess . . . . . ( a big Pat on da' back ) . . . . as you always provide frequent and adequate feedback . . . . many times solving your own problems.
::
::
::
::73's de Edd
::
::
::
::
::Prayer: " Oh Lord, give me patience, but give it to me 'RAT NOW ! ".
::
::
::
::
::
::
::
::
::
::
::::Dave
::::
:::: 1J6 is unusual in some ways. It can operate with zero grid bias. With some bias it draws little current. When you are testing the tube be sure filament is 2 volts.
::::
:::: 1J6 is rated to 135 volts. You might be reading higher voltage because the 1J6 isn't drawing hardly any current? See if voltage is lower with a new tube. I have some here if you have a hard time getting a 1J6.
::::
:::: http://frank.pocnet.net/sheets/084/1/1J6G.pdf
::::
::::Norm
::::
:::::Hello Again All,
::::: I tested the 1J6 on my SECO model 107 tube tester and it tests very very weak. It's maybe up to 3%. But I don't have another one to try. So I have to order one.
::::: It WAS playing ok last night, so I suspect that one of the old resistors failed. Also I see 210 volts on each plate. Is that too high?
:::::
:::::Thanks,
:::::
:::::Dave
::::::Hello All,
:::::: When I turned on the radio today it refuses to play loud. The sound is good but if you try to turn it up it distorts but won't get loud. All B+ voltages are good. Where should I look? I replaced all paper and electrolytic capacitors. Nothing is touching that shouldn't. This is very odd. It would be odd that the 1J6 is failing.
::::::
:::::: Please help if you can.
::::::
::::::Thanks,
::::::
::::::Dave
::::::
:::::
:::::
::::
::::
:::
:::
::
::
:
:
I was studying the schematic when I noticed that the filament of the 1J6 is in series with the two dial lamps. There are shunt resistors 21 ohms, but if a dial lamp burns out the filament voltage on the 1J6 will be too low, causing that problem.
Do you have 2 2.9 volt bayonet bulbs? If not I'll try to find 2 #45 bulbs.
I put in a # 47 bulb temporarily and the Oomph is back. So that problem is normal if the dial lamps burn out in a Zenith 7J232. The "mystery" is solved. Filament voltage is back to 2.
Thanks,
Dave
:Dave
:
: 1J6 is unusual in some ways. It can operate with zero grid bias. With some bias it draws little current. When you are testing the tube be sure filament is 2 volts.
:
: 1J6 is rated to 135 volts. You might be reading higher voltage because the 1J6 isn't drawing hardly any current? See if voltage is lower with a new tube. I have some here if you have a hard time getting a 1J6.
:
: http://frank.pocnet.net/sheets/084/1/1J6G.pdf
:
:Norm
:
::Hello Again All,
:: I tested the 1J6 on my SECO model 107 tube tester and it tests very very weak. It's maybe up to 3%. But I don't have another one to try. So I have to order one.
:: It WAS playing ok last night, so I suspect that one of the old resistors failed. Also I see 210 volts on each plate. Is that too high?
::
::Thanks,
::
::Dave
:::Hello All,
::: When I turned on the radio today it refuses to play loud. The sound is good but if you try to turn it up it distorts but won't get loud. All B+ voltages are good. Where should I look? I replaced all paper and electrolytic capacitors. Nothing is touching that shouldn't. This is very odd. It would be odd that the 1J6 is failing.
:::
::: Please help if you can.
:::
:::Thanks,
:::
:::Dave
:::
::
::
:
:
Good to hear you found the problem.
http://www.nostalgiaair.org/PagesByModel/317/M0025317.pdf
Number 1490 bulbs can be used:
http://www.bulbdirect.com/products/product.php?item_id=2346&cat_id=
They are half of a #47. A #45 draws .5 amps. This will cause too much filament voltage across the 19 tube. Current rating is important in a series circuit.
Norm
:Norm,
: I was studying the schematic when I noticed that the filament of the 1J6 is in series with the two dial lamps. There are shunt resistors 21 ohms, but if a dial lamp burns out the filament voltage on the 1J6 will be too low, causing that problem.
: Do you have 2 2.9 volt bayonet bulbs? If not I'll try to find 2 #45 bulbs.
: I put in a # 47 bulb temporarily and the Oomph is back. So that problem is normal if the dial lamps burn out in a Zenith 7J232. The "mystery" is solved. Filament voltage is back to 2.
:
:Thanks,
:
:Dave
::Dave
::
:: 1J6 is unusual in some ways. It can operate with zero grid bias. With some bias it draws little current. When you are testing the tube be sure filament is 2 volts.
::
:: 1J6 is rated to 135 volts. You might be reading higher voltage because the 1J6 isn't drawing hardly any current? See if voltage is lower with a new tube. I have some here if you have a hard time getting a 1J6.
::
:: http://frank.pocnet.net/sheets/084/1/1J6G.pdf
::
::Norm
::
:::Hello Again All,
::: I tested the 1J6 on my SECO model 107 tube tester and it tests very very weak. It's maybe up to 3%. But I don't have another one to try. So I have to order one.
::: It WAS playing ok last night, so I suspect that one of the old resistors failed. Also I see 210 volts on each plate. Is that too high?
:::
:::Thanks,
:::
:::Dave
::::Hello All,
:::: When I turned on the radio today it refuses to play loud. The sound is good but if you try to turn it up it distorts but won't get loud. All B+ voltages are good. Where should I look? I replaced all paper and electrolytic capacitors. Nothing is touching that shouldn't. This is very odd. It would be odd that the 1J6 is failing.
::::
:::: Please help if you can.
::::
::::Thanks,
::::
::::Dave
::::
:::
:::
::
::
:
: