[R-390] It's fixed. Confirmed.
Barry Hauser
Barry Hauser <[email protected]>
Fri, 29 Mar 2002 19:23:53 -0500
Jim wrote:
> Hello to all on the list,
Hi Jim..
> It's fixed. For sure. Confirmed. At least the symptoms I have been
> complaining about are gone........
Well, as the doctor might say -- If the symptoms are gone, that means you're
cured -- or over-medicated.
> I tested all the resistors and caps that attach to V201/6DC6 tube socket.
> All seemed good, except C229/ .005 looked like it should be replaced, so
I
> did. May or may not have done any good.
Did you look sideways at it to see if it wiggled when it thought you weren't
looking?
>
> I also resoldered ALL the socket pins, and the leads opposite to the
> components attached to the socket pins.
Like I told ya' (and a couple other guys) ...
>
> Viola!! All bands are strong and stable. They all peak with internal
> noise.
H'ray! Should be safe to pop the cork now, eh?
> This is a "massacre" radio after all, and resoldering the socket pins
> probably did the trick, but MAYBE replacing C229 did it.
Uh-oh. No good. You have been unscientific. Gotta backtrack now ...
> Regardless of the cause, it is workin fine for the moment, and I learned a
> whole lot about this radio and electronic terms in general.
Sorry, Jim. After all that "regardless of the cause" is unacceptable. This
is NOT how FAQ's are born.
Now, as a controlled test -- for confirmation of the true root cause --
reinstall that cap you replaced and test again. If the squeal, microphonics
and motorboating recur, then it was the cap. If not, by logical deduction,
it was a bad solder joint. Future generations are depending on you. If you
don't, fifty years from now, some pilgrim is gonna be scratching his head --
Do I resolder the pins or replace C229?
> Too many assisted and supported my efforts to put this receiver back in
> service, to individually thank, so please accept my thanks to the group
over
> all. I know that those who did not respond would have if they had the
> expertise to work on this specific problem. Thanks. again.
Not good enough. Handwitten personalized thank you notes are in order. Be
sure to scent them with Eau De D5 before mailing.
> Now back to the alignment.
Uh-Oh. Maybe you should take the weekend off -- it's a holiday. You do
know about staggered tuning, right?
regards,
Barry