[Heath] More on the SB-104A rx noise...

[Kenneth G. Gordon]

On 8 Jan 2014 at 21:46, Alexander N. Gerli wrote:

> Hi, gang,
> 
> Thanks for all the responses. I have a couple of good leads.
> 
> One of which is pulling the NB board, as it apparently introduces some
> distortion even when switched off. In my A, if I unplug the NB board,
> the RX goes totally dead. So, that accessory board is definitely not
> an unplug-and-play job as was suggested.
> 
> My A had the NB installed when I acquired it and I don't have the
> manual for that board. Could someone pse tell me what the pin-to-pin
> jumper(s) would be for the NB socket when the board's removed? I'm
> sure that'll take care of it.

FYI, there was an article and a follow-up in QST magazine some time ago 
on how to add that NB to Collins gear. Apparently, when it is working 
properly, it is one of the best NBs out there.

Ken W7EKB