[ARC5] OT - the BC-221-D, tube types.

Sat Dec 17 16:04:06 EST 2016

On 17 Dec 2016 at 12:47, Richard Knoppow wrote:

>     I can't find any other place where a Type 77 is shown like this. I 
> think its an error that was repeated in the schematics. The 77 was 
> recommended by RCA for use as a plate detector, which is the application 
> in the BC-221. I wonder if there are schematics from other sources.

I think that in order to answer this question adequately one will have to "dismantle" a 77 and 
examine it closely.

I don't have one here at the moment.

Ken W7EKB

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