[Heathkit] [Heath] 6146B Issues

[Whitebear1122]

Hi Chris, From what I understand, the later 32S-3's and KWM-2's neutralization circuit used an air variable capacitor while the earlier versions used a ceramic trimmer.  I've successfully replaced finals in my old 32S-3 and KWM-2A (both with air variable neutralization caps) with NOS 6146W's and they neutralized just fine.  I also understand that B's and W's "may" neutralize just fine with the older ceramic trimmer circuit but you take your chances.  Personally I wouldn't take the chance because I'd be afraid of burning out something else if the neutralization doesn't work.  I've read Glens article probably a dozen times over many years and it's been a good guide for me.  If you're wondering what to do with all those B's, feel free to send them to me hi hi  73, Scott WA9WFA


On Oct 13, 2013, at 10:25 PM, "Chris Kepus" <ckepus at comcast.net> wrote:

> Glen, 
> 
> 
> 
> Your article on the 6146 family is very informative and helpful.  However,
> it begs the question..what to do with all those 6146B/8298A's? 
> 
> 
> 
> Your article stated that Collins "figured it out" for the later S line
> transmitters (amazing what necessity fosters).
> 
> 
> 
> I wonder if anyone has compared the Collins neutralization circuitry for the
> early transmitters to the latter ones?   Could the later S-line approach
> (whatever it is) work with other 2X 6146 rigs so that they would be "happy"
> with the B's?  
> 
> 
> 
> Are there any other known 2X 6146 rigs that can run B's without problems?
> 
> 
> 
> Glen.anyone?
> 
> 
> 
> 73,
> 
> Chris
> 
> W7JPG
>