Howard 437A

[JohnJack M Iverson]

I hope that i am not beating this thing to death, but when i said to bake
the transformer, that is just what i meant, but forgot to say to first
remove it from the radio.  that way other components would not be damaged
from the heat.
  As an aside, most electric motor repair shops will take pity on a poor
ham and will take his "pole pig" and put it in the back of his varnish
bake oven for a few cycles and if possible maybe put in the varnish vat
and re-bake it.  this i have done and boy, was that a quiet tx. 3kv at 2
amps without a quiver.  as i recall that was a 5 kva wagner tx.
 Some of the other old timers out there will remember this,oil and all.
sorry to take up so much space.
                            73  old jack

On Sun, 11 Jul 1999 16:17:35 -0400 Christian Fandt <cfandt at NETSYNC.NET>
writes:
> Upon the date 12:59 PM 7/10/99 -0500, JohnJack M Iverson said
> something like:
> >Dave, the lesson here is   do  not  "hose the chassis off" if you
> did get
> >water in the tx, the best way is to put it (the tx) in the oven at
> 235
> >degrees for about 1 to 2 hours. after removing it, drizzle a good
> grade
> >of transformer varnish on the exposed windings   you will have to
> take
> >the covers off to do this.
> >a much simpler approach would be --  do not get any wound,
> insulated
> >devices wet--   ok?
> >   I shall now wait for the comments from the group.    don't hit
> me too
> >hard..   old jack
>
> Well, this is good advice Jack. No hits needed :)
>
> Also, it could have been stored in a damp basement or shed and was
> ready to
> let its smoke out anyway. Over the years moisture could have
> combined with
> some residual acids or atmospheric pollution, etc. in the winding
> separator
> papers and very slowly caused deteriation of the wire varnish. I've
> seen
> this often already on other radios of similar vintage.
>
> Regards,  Chris
> -- --
> Christian Fandt,         Electronic/Electrical Historian
> Jamestown, NY  USA      cfandt at netsync.net
> Member of Antique Wireless Association
>              Check our redesigned website!
>         URL: http://www.antiquewireless.org/
>
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Jack Iverson    K0EWU    jackiv at juno.com
ARRL,  IEEE LM,  RCA, AMI, ARCI, QCWA,CCA

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