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Antique Radio Technical Forum
Zenith 7J232 lost oomph

Posted by Dave Froehlich on 02/09/2012 16:06

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
:::
::
::
:
:


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Zenith 7J232 lost oomph 
Dave Froehlich  02/09/2012 14:51 
Dave Froehlich  02/09/2012 15:29 
Norm Leal 02/09/2012 16:00 
Dave Froehlich  02/09/2012 16:06 
Dave Froehlich 02/09/2012 16:12 
Dave Froehlich  02/09/2012 17:22 
Edd 02/09/2012 18:15 
Dave Froehlich 02/09/2012 20:58 
Norm Leal 02/09/2012 23:21 
Dave Froehlich 02/09/2012 18:31 
Norm Leal 02/09/2012 19:40 

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