[Johnson] Valiant Smoke test

[w5sum]

Skip
whatever you do, DONT replace them with those darned postage stamp sized 
RECEIVING silver mica's. They are trouble waiting to happen. They will on ly 
fry on you again.

What you need to put in there are 3KV Transmitting Silver mica's. If you 
can't junk box them, or get th em from a friend, call Surplus Sales of 
Nebraska. I don't like thier prices but they have the good stuff.

You will have to make room for them in there but you can do it.

I have had this same problem with TWO Valiants in the past and trust me, this 
will fix it.

Now..  after you replace those, check your RF choke for the Plate section 
real carefully, along with the two ceramic disc caps that go before and after 
it... they will usually take a pretty good hit when those output loading caps 
go.

Ronnie

On Thu, 20 Nov 2003 14:52:58 -0500, skip wrote
> Yesterday my Viking Valiant went up in smoke.  I think I caught it early
> enough not to do much damage.
> 
> The only apparent destruction was the silver mica's from the band 
> switch to ground. There are four of the 150 uuf.  two in parallel 
> and then series. the same with the 350uuf.
> 
> Well I guess if they are 5% tolerance  I can retrofit them with 
> 160uuf and 360uuf I can't find 150 and 350 respectfully.
> 
> My question is, could this due  to its age  ?????
> Could there be another seen problem lurking , maybe finals ?????
> 
> I know there are a number of 6146 tubes out there.  Is there 
> advantage to replacing them with the 6146B.  I seem to ember that 
> there was a different bias on them.  I also remember 6146 W, 6146A 
> and I think the military 6146R
> (rugged)
> 
> Tnx de skip   K3CC
> 
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The "AM" voice of Shreveport, Louisiana USA
formerly WN5AIA and WB5AIA
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