Home |
Search |
Today's Posts |
#3
![]() |
|||
|
|||
![]() "bpnjensen" wrote in message om... [snip] (2) The degree of AM BCB intermod, especially below 4 MHz, is dramatically increased, almost to the point where nothing legitimately below 4 MHz can get through. All preamps off, still get the gunk where it wasn't before. Booo. You might want to look it over for a wire pulled loose, a cracked circuit board trace or a poor solder connection. It's possible you did some inadvertent damage as you disassembled it. Happens to me from time to time. Even if I didn't spot anything, I would probably shotgun a bunch of solder joints with an iron. Or, it could be that I did not let the stuff evaporate enough (so it gets another 24 hours as we speak). Evaporation shouldn't be a factor. The solvent is flammable and it's wise to give it time to evaporate if the stuff got into a power switch. But just having the stuff sloshing around inside a pot isn't going to change it's performance. The solvent isn't conductive. The solvent does have some dielectric constant, and can effect the way a tuning capacitor tunes until it evaporates. Or, the DeOxit had some unintended effect on the unit, either inside or outside the pots. I think this is unlikely. As I investigate more, I will try to fill in the gaps. I also have a PAR BCB intermod reduction filter I will try ahead of and behind the unit. Meanwhile, I will appreciate any other ideas folks might have. Look for damage. 73, and don't let the political junk get you down, Bruce Jensen Frank Dresser |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
FA: MINT-O VINTAGE IRC METAL DISPLAY/STORAGE BOX w/NOS POTS, ETC | Equipment | |||
FA: MINT-O VINTAGE IRC METAL DISPLAY/STORAGE BOX w/NOS POTS, ETC | Equipment | |||
Noisy trimmer pots | Homebrew | |||
WTT old pots | Boatanchors | |||
WTT old pots | Boatanchors |