[R-390] Little problem

[blw]

> Gil,
> 
> I agree with Tom about the 14MHz crystal.  As this crystal serves the 11
> MHz and 25 MHz bands, I would look at the 25 MHz band and see if it is
> off as well. If it is, you definately have a bad 14 MHz crystal.
> 
> Good luck,
> 
> Frank


This would be a good time to clean all of the crystal pins and put a little
DeOxit on them. 

Same goes for all of your tube pins. I went ahead and did all of my
connectors too. I used a soft, nonabrasive, non compound type of slick
eraser. It basically burnishes the crud off of the metal contacts to leave a
smooth metal surface. Any fast drying liquid will leave a residue layer when
it dries. When current is applied, this residue cooks and forms a shellac
layer between metal contacts. The eraser polishing is fast and gives you a
good metal to metal contact.

The performance increase was very noticeable after doing all of the above.



Barry