Fw: [AMRadio] Valiant

[john_walker_beasley]

> Ron,
>
>     Thanks so much.  This information begs the question:
> Who carries these parts ?  I'll check VanSickle here in STL
> at lunch today, but it's probably a long shot !
>
>     Thanks Again !
>
>
> PS   Don (K4KYV), can we postpone that sked till I nurse
>         this back to health !
>
>     --... ...--
> John,  WAØSTX
>
> ----- Original Message -----
> From: <w5sum at glowbugs.com>
> To: "john_walker_beasley" <jbeasley at earthlink.net>;
> <amradio-admin at mailman.qth.net>
> Sent: Friday, April 05, 2002 6:37 AM
> Subject: Re: [AMRadio] Valiant
>
>
> > John
> > I had EXACTLY this same problem on 75M and 160M with my
> > Valiant. It would tune up fine on every band above 75M. Turned out
> > to be bad Mica capacitors, C38A-D and C39A-D. Both of these are
> > combinations. C38A-D are 150PF recieving micas rated at 500Volts
> > each. C39A-D are 330pf receiving micas and are also rated at
> > 500V each. These are barely able to do the job. Why johnson put
> > those weak sisters in there is beyond me.   Check these real close.
> > In my situations just ONE of the 330PF micas was actually bad. It
> > was burned beyond recognition. The 150's looked perfect. I changed
> > out the 330 and it worked a short time then burned out again. This
> > time I took all four caps out and replaced them with a 330PF 6KV
> > Mica Transmitting cap.  Then I decided that I would go ahead
> > and replace the 150's also. Upon removing the 150's and examining
> > them real well two of them had carbon tracks burned alone thier
> > backsides where I could not see them before. I likewise replaced
> > this grouping with a 150PF 6KV transmitting mica. Its a squeeze
> > to get these big caps in back there but I did it and she has worked
> > just fine every since.
> >
> > You might also examine your bandswitch real well. The little rivets
> > have been known to come loos and make the bandswitch
> > connections a little iffy.
> >
> > Good luck on y our Valiant
> >
> > Ronnie - W5SUM
> >                       W5SUM
> >                ex WN5AIA & WB5AIA
> >              http://www.glowbugs.com
> >
>