Automatic Radio Model 920

2/12/2008 1:28:12 PMTom

Can anyone e-mail me a schematic for an Automatic Radio model 920 I can't find one
Thanks
Tom

2/13/2008 11:48:36 AMEd

What age would you guesstimate it to be and what tube lineup ?
Ed

:Can anyone e-mail me a schematic for an Automatic Radio model 920 I can't find one
:Thanks
:Tom

2/13/2008 12:03:30 PMTom

Ed, I don't know about the age but late 30's early 40's would be my guess. Tube line up is 6D6, 6C6, 43, 25Z5, tunning eye 6E6 and a ballast tube.
Thanks for the help,
Tom

:What age would you guesstimate it to be and what tube lineup ?
:Ed
:
::Can anyone e-mail me a schematic for an Automatic Radio model 920 I can't find one
::Thanks
::Tom

2/13/2008 4:43:25 PMWalt

: Tom- That Tuning eye tube would be a 6U5/6G5 type.
They list some models with a similar tube line-up,but without the Tuning eye(4 tube models).The schematics may be similar otherwise. Make sure that they are superhet,like yours is. They are:B10,10LW,10P,15,20,D5,T,40,50,816 and 818. If you find one of these to compare with what you have,it may help you out. I'll post any info I find. Best of Luck. -Walt.

2/13/2008 6:06:28 PMTom

:Walt, Looking at this radio I thought it was a TRF radio, no if transformers, the eye tube is a 6E5 but this may be a tube that someone has sub'ed in. I did find one model that looks like my radio with no eye tube and that was a model D5 but some of the cathode wiring is different.
Thanks for the help
Tom

:: Tom- That Tuning eye tube would be a 6U5/6G5 type.
:They list some models with a similar tube line-up,but without the Tuning eye(4 tube models).The schematics may be similar otherwise. Make sure that they are superhet,like yours is. They are:B10,10LW,10P,15,20,D5,T,40,50,816 and 818. If you find one of these to compare with what you have,it may help you out. I'll post any info I find. Best of Luck. -Walt.

2/13/2008 6:14:21 PMTom

:Walt, also the only model number out of the list in your last post that this site lists is the one for the D5. Do you know of any other site that may let me check the other model numbers from your last post.
Tom

2/14/2008 4:48:10 AMWalt

Tom- Your radio is listed as a superhet in the Radio Diagram Sourcebook,but that could be in error. They list the D5 as a TRF. The 6E5 is listed as a substitute for the 6U5/6G5,so you should be OK there. No luck on schematic data for the 920 yet. -Walt.

2/14/2008 4:09:21 PMEdd

That is also certainly what I was thinking about, in the respect of a tuning eye tube being utilized in that set.

With two pentodes and an AF power tube along with the rectifier in the tube lineup, that certainly doesn’t
sound like needing the conjunct utilization of a tuning tube,
unless its was for more precise tuning indication on a
TRF set design.

Usually one only expects eye tubes on the top of the series sets, with up to ’lebenteen tubes in them.

How about looking at the tuning condenser and seeing how many sections that it has and if all sections
seem to be of the same value….a la TRF.
Also, is the tuning eye tube “officially” factory mounted with an
eye brow front bezel and typical mounting socket ?

73's de Edd

: Tom- Your radio is listed as a superhet in the Radio Diagram Sourcebook,but that could be in error. They list the D5 as a TRF. The 6E5 is listed as a substitute for the 6U5/6G5,so you should be OK there. No luck on schematic data for the 920 yet. -Walt.

2/15/2008 7:18:13 AMTom

:
:
:

:
:
:
:That is also certainly what I was thinking about, in the respect of a tuning eye tube being utilized in that set.
:
:With two pentodes and an AF power tube along with the rectifier in the tube lineup, that certainly doesn’t
:sound like needing the conjunct utilization of a tuning tube,
: unless its was for more precise tuning indication on a
:TRF set design.
:
:Usually one only expects eye tubes on the top of the series sets, with up to ’lebenteen tubes in them.
:
:How about looking at the tuning condenser and seeing how many sections that it has and if all sections
:seem to be of the same value….a la TRF.
: Also, is the tuning eye tube “officially” factory mounted with an
:eye brow front bezel and typical mounting socket ?
:
:
:
:
:73's de Edd
:
:

:
:
:Ed, Yes the tunning cap is a two section unit and both sections are the exactly the same. Very odd a tunning eye with a TRF would this not have to have AVC to run the tunning eye? this is a very simple radio and somone has put in alot of electrolitic caps in the power supply and I want to make sure they are correct, one schematic shows a electrolitic cap of about 6 or 8uf shunting a cathode resister on I think the output tube, but mine does not have the cathode resister as the cathode is just grounded. This radio works very weak only getting 2 staitions.
Tom

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:: Tom- Your radio is listed as a superhet in the Radio Diagram Sourcebook,but that could be in error. They list the D5 as a TRF. The 6E5 is listed as a substitute for the 6U5/6G5,so you should be OK there. No luck on schematic data for the 920 yet. -Walt.