[ARC5] MW and the BC-375

[Bruce Long]

Please stop sending mail to this address. It is no longer being used by Bruce Long.

Thank you!

> On Jan 14, 2021, at 8:25 PM, Kenneth G. Gordon <kgordon2006 at frontier.com> wrote:
> 
> On 14 Jan 2021 at 14:40, arc5 at ix.netcom.com wrote:
> 
>> Finding suitable substitute tubes for the BC 375 has been one of my Holy Grail projects for a long 
>> time. Stumbling block is the oscillator. 811 substitute just fine for the rest. One of these days. I 
>> haven't given up on it.
> 
> Dave:
> 
> The 811 is a "zero-bias" triode. As such, it needs considerable external feedback to oscillate. 
> Connect a suitable capacitor directly between the plate and the grid, and I am certain any 811 
> you wished to try there would work as the oscillator.
> 
> You might also consider doing the same thing with a 572B.
> 
> It should work the same way.
> 
> Being careful to arrange some way to keep the plate voltage off the grid if your capacitor 
> failed might be advisable. ;-)
> 
> Ken W7EKB
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