Re: P3 SVGA interference -

Posted by W5RDW on May 29, 2012; 4:34pm
URL: http://elecraft.85.s1.nabble.com/P3-SVGA-interference-tp7556731p7556751.html

n6ax wrote

There is (was) a known problem with the MMIC amplifier (comprising the IF amp into the P3) oscillating.....this instability could certainly manifest itself in what you are seeing.

Wow, this could be what my problem has been. In my past years as a microwave engineer, I used many of the MMIC amps when they first came out and they were difficult to tame, as they have a ton of gain at very low frequencies (lower than what they were intended to be used). I can see this may be what my problem is (was), as the signal that was creeping across the screen was large in amplitude and shaking a bunch....(aka like an oscillation).

It looks like Elecraft has noted the problem. I may have temporarily solved my problem buy "finger tweaking" the assemblies by pushing, pressing, etc. but a more permanent solution will be needed eventually.