[Heath] SB-104A rx noise problem

[Alexander N. Gerli]

Hello, folks!

I love my SB-104A, great dependable rig. I have made many of the board mods
recommended by Kees, K5BCQ and they've helped a lot. My rig is an SB-104
upgraded with the 'A' kit before I acquired it a few years ago.

However, one thing still annoys me: on any band that's fairly busy (40M
daytime for a typical example), there's a hash noise that runs underneath
everything, a baseline noise. And, also, often I get an audio and S-Meter
pumping which sounds just like a real wide station 5kHz away; this pumping
is there across the band almost as if there's some strong-signal front-end
overload.

By immediate comparison, I have my old Hallicrafters SR-400A rig. Has a
really quiet receiver noise floor. The noise in the Heath isn't there when
I switch to the Halli.

There must be some mod I have missed somewhere for the RX/Front End board
to help quiet this down. Does anyone on the List have any recommendations
for me? I'd surely appreciate some help with this.

73,


Sandy AC1Y


Alexander N. Gerli, Sr.
548 Allred Mill Road
Mount Airy, NC 27030-2202

Scotsmen walk about 900 miles each year.
A Scotsman drinks around 45 gallons of Whisky a year.
Scotsmen get about 20 Miles Per Gallon.
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