[ARC5] CW/MCW

[Geoff]

>
> ________________________________________
> From: Kenneth G. Gordon [kgordon2006 at frontier.com]
> Sent: Monday, November 11, 2013 3:43 PM
> To: Fuqua, Bill L; ARC-5 List
> Subject: Re: [ARC5] CW/MCW
>
>
>>    Other good options were to use pentagrid converters for product
>>    detectors.
>
> Yes. 6BE6 was commonly used for such. I never liked that particular kind 
> of
> PD though. The 6BE6 is a very noisy mixer and doesn't make a particularly
> stable BFO either.


The 6BY6 is a much better choice for low noise and overload resistance, and 
in all cases an external BFO is the best. OTOH for general use a PD 
generated BFO is sufficient when the frequency is low enough such as in the 
50-80 kc range as with most of the later model comm receivers.

Carl