[ARC5] The Search for a Retubed, Stable BC-375 Oscillator

[Jim Falls]

Neutralizing

I listen to it on my multi mode Yaecomwood in FM mode. Closer than any scope I own. 

I run mine AM all the time and no complaints from The Enthusiasts. 

Cheers!
Jim K6FWT
CBLA #37

> On Nov 19, 2014, at 07:23, David Stinson <arc5 at ix.netcom.com> wrote:
> 
> Thanks to the many people smarter than me on these
> excellent lists, I've learned a lot while fiddling-around
> with the SCR-183 and the WECO 227B rigs.
> Time to get back to re-tubing and stabilizing the BC-375.
> 
> Here is a diagram of the BC-375 oscillator in
> its native condition:
> http://home.netcom.com/~arc5/375osc.jpg
> 
> This is my first idea- to open the feedback to the
> OSC grid and feed to Aux Osc. in there.
> The original OSC tube will act as a "buffer/amp."
> http://home.netcom.com/~arc5/375AuxOsc.jpg
> 
> However-it's a triode.  Neutralization might be
> an issue.  If so, how would you accomplish it?
> Ground rules:  No drilling, hacking or whacking.
> Every change must be 100% restorable to original.
> 
> TNX OM ES 73 DE Dave AB5S
> 
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