John E. Coleman wrote:
Here is a story that I'm sure some of you have heard but others may
enjoy.
In 1994 a flood came to the Spring, Texas area, just north of
Houston, and water was over the top of the building that our business
was in. In addition, the ham shack was a trailer that was
Subject: Re: [AMRadio] Re: 500 Transformer
Date: Wed, 12 Feb 2003 21:31:23 -0500
Jeff,
Baking transformers behind the XYL's back is a CINCH---the REAL challenge
comes when you're trying to bake on an enamel finish paint job on some
enclosure that you sprayed earlier...!
Even I must admit to doing
transformers and paint hi. Russ.
From: Eddy Swynar [EMAIL PROTECTED]
Reply-To: amradio@mailman.qth.net
To: amradio@mailman.qth.net
Subject: Re: [AMRadio] Re: 500 Transformer
Date: Wed, 12 Feb 2003 21:31:23 -0500
Jeff,
Baking transformers behind the XYL's back is a CINCH---the REAL
I have an old stove in the basement- used to be used for canning etc.
the oven is never used for cooking food here, so- perfect for baking
transformers and paint hi. Russ.
I have never had any problem using an oven for baking stuff like that. Just
try to avoid spilling tar
From: Geoff Edmonson [EMAIL PROTECTED]
...This doesn't mention that the whole rig was under water, and that the
250TH's survived (if I recall correctly [IIRC]) without damage.
Reminds me of the time W9WT Bob Parmentier's XYL called Roger N4IBF (SK) and
me to come get all his radio
@mailman.qth.net
Subject: Re: [AMRadio] Re: 500 Transformer
Never throw away a tube that has not been tested, no matter how rough a
shape it appears to be in. Some of my best 211's (my HF-300 rig uses a
211
rf driver) came out of that pile of mined tubes.
Don K4KYV
Regarding drying transformers etc. I have been drying transformers and
chokes for quite a few years. I have used both electric and gas ovens
with no apparent difference in results. I store my spare transformers in
an unheated outbuilding and temperatures here in Wisconsin run from -20F
to +100 so
on some errand!
~73~ Eddy VE3CUI - VE3XZ
- Original Message -
From: Jeffrey J. May [EMAIL PROTECTED]
To: amradio@mailman.qth.net
Sent: Wednesday, February 12, 2003 7:17 PM
Subject: Re: [AMRadio] Re: 500 Transformer
Hi John!
You mean that your wonderful xyl lets you use her oven
It is not really unusual for these transformers to go bad. You must
consider the age and how they were manufactured. You can blame
Johnson for using cheaper transformers, they could have used potted
designs. But who would have thought that you would be using this old
Hi Russ,
You speak the truth...
I still have an old Speedy Memo somewhere in my shack library from one of
the Hammond Transformer engineers in Guelph, Ontario, Canada, advising me
to literally BAKE any long-unused, vintage, unpotted transformers in the
oven, to remove residual accumulated
Be careful about using a gas-fired oven to dry out the transformers. Water
is a by-product of gas combustion, and the air will carry plenty of water
vapour. Better to use an electric stove oven.
If you are in no hurry, bring the transformer into a dry, heated room and
store it there
I'll second the slow-dry method. The dessicant capsule in my Collins PTO turned
from pink to blue in just a few days just from sitting in my heated basement
room, 29% relative humidity!
-Tony, K1KP
PROTECTED]
Sent: Tuesday, February 11, 2003 7:52 PM
To: amradio@mailman.qth.net
Subject: Re: [AMRadio] Re: 500 Transformer
I'll second the slow-dry method. The dessicant capsule in my Collins PTO
turned from pink to blue in just a few days just from sitting in my
heated basement room, 29% relative
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