[Hallicrafters] Hallicrafters S-77.

[Jim]

This thread has stirred my interest in my S-77a.
It had not been powered up for at least 20 years and will require re-capping 
at a minimum.

I recall a modification to add a GFI plug to an AC/DC type radio, but can't 
find the article.

Does anyone have a link to it?

Jim

> If you don't have the correct ballast tube for 117 volts, (nearly 
> impossible to find),  the mod shown on page 12 of the S-77 manual at the 
> BAMA website should work.
>
> http://bama.edebris.com/manuals/hallicra/s77/
>
> The  S-77 that I sold a few years ago was modified the same  way. You will 
> have to find a couple of 55 volt type 1835 panel lamps and an 8 ohm 15 
> watt resistor.  The resistors shown for R38 on the schematic on page 11 
> are actually  resistance wires inside the ballast tube and the values 
> written in might be a cold measurement across the pins. I'm not sure of 
> the differences between the S-77 and S-77A.
>
> Les Layton
>
>
>
>
>
> ---- Brian Goldsmith <brian.goldsmith at echo1.com.au> wrote:
>> Greetings to all.Would anyone have the full details of the ballast 
>> resistor
>> R38 setup in S77A?It came in two versions, 117Volt and 220Volt.There is 
>> some
>> information hand written into one of the manuals I have however,the 
>> resistor
>> values seem to be incorrect.
>>
>> Thanks,Brian G.
>>
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