[R-390] Should this work?

[Barry]

I think you may have the answer.  I grounded the point I was talking about
earlier and that didn't help.  It grounds more than just the capacitor, but
it still didn't help.

I put a tube extender on V509 and checked plate voltage at pin 6.  There
should be185V there and I'm getting a small negative voltage (< 1v).
Probably either a blown fuse or a bad wire in the harness.  Didn't have time
to explore any further on my lunch break, but I assume I'll find this pretty
quickly tonight.

Thanks, guys!

Barry - N4BUQ

----- Original Message ----- 
From: "David Wise" <David_Wise at Phoenix.com>
To: <JMILLER1706 at cfl.rr.com>
Cc: "R-390 HF Receiver List" <r-390 at mailman.qth.net>
Sent: Thursday, May 05, 2005 12:29 PM
Subject: RE: [R-390] Should this work?


(Three-fuse versions only) F103 burnt out will kill most of
the RF-IF B+ while keeping the 0A2 alight.

Dave Wise

> -----Original Message-----
> From: JMILLER1706 at cfl.rr.com [mailto:JMILLER1706 at cfl.rr.com]
> Sent: Thursday, May 05, 2005 10:22 AM
> To: Barry
> Cc: R-390 HF Receiver List
> Subject: Re: [R-390] Should this work?
>
>
> Is the diode load jumper missing in the back?  Getting
> voltage there?
> Bad gain pot?
> JM
>
> ----- Original Message -----
> From: Barry <n4buq at aol.com>
> Date: Thursday, May 5, 2005 10:14 am
> Subject: [R-390] Should this work?
>
> > Working on the "new" R390A.  I have it mostly back together (at
> > least enough
> > to run some tests).  I tested everything except the RF deck by
> > substitutingthe modules into my working radio and everything I
> > tested checked out
> > functional.
> >
> > When I powered up the radio, I got nothing on the audio except a
> > small hum
> > when the volume is turned up to 100%.  I didn't figure on hearing
> > anythingin the way or radio signals since the RF deck is in
> > complete need of an
> > alignment, but I did expect to hear some noise.
> >
> > I injected the audio signal generator into pin 7 of the plug that
> > connectsthe IF deck (P112) and was able to get good audio on both
> > line and local.
> >
> > I then decided to take the IF output from the working radio's RF
> > deck (with
> > the radio tuned to a good strong station) and plug it into the
> > input of the
> > IF deck on the radio under test.  Since I had checked the IF deck by
> > substituting it into the working radio and it does work there, I
> > figured I
> > should get some signals that way.  Still nothing.
> >
> > Is this a valid thing to try?  I realize the IF deck still needs a
> > touchupfor alignment, but it should be close enough to hear
> > something through the
> > chain.  It worked when I substituted it into the working radio a
> > few weeks
> > ago so I assume it should still be working.  Unless something has
> > brokensince then (and I'll try substituting it again to make
> > sure), I would think
> > this should produce some signals.  No?
> >
> > Thanks,
> >
> > Barry - N4BUQ
> >
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