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

[Jim Shorney]

There was a published mod for the 104/A to use a spare set of contacts on the
NB switch to switch the board out of the RF path when off. I've never tried it,
so I don't know ifIF leakage becomes an issue.

73

-Jim
NU0C

On Wed, 8 Jan 2014 21:46:02 -0500, 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.
>
>73, Sandy AC1Y
>
>
>
>
>Alexander N. Gerli, Sr.
>548 Allred Mill Road
>Mount Airy, NC 27030-2202
>
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