[ARC5] BC-946 Tuning capacitor removal and panel straightening

[Bob Macklin]

What is the frequency needed?

Bob Macklin
K5MYJ
Seattle, Wa.
"Real Radios Glow In The Dark"
----- Original Message ----- 
From: "Ian Wilson" <ianmwilson73 at gmail.com>
To: <kgordon2006 at frontier.com>
Cc: "David Stinson" <arc5 at ix.netcom.com>; "ARC-5 List" 
<arc5 at mailman.qth.net>
Sent: Sunday, March 27, 2011 1:08 PM
Subject: Re: [ARC5] BC-946 Tuning capacitor removal and panel straightening


> I've had some success with BFOs for low-frequency IFs using non-tapped
> inductors with
> a Colpitts oscillator. Most recently I did this using a 12mH RFC. I can't
> find the circuit
> right now but it's here somewhere. I was able to get 85kHz and a 
> reasonable
> swing around
> that with 100pF variable (across the RFC).
>
> So it may well be possible to stuff a BFO can with new components to work 
> on
> the higher
> IF but without any visible change (there will have to be some changes 
> around
> the oscillator
> tube, unfortunately).
>
> 73, ian K3IMW
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