Man am I glad this thread came up. I just moved a big transformer I bought
used in 1976. It's been sitting all this time waiting for my 4-1000
project. I'll bake it when the XYL is out. What further testing/break-in
would /should I need to do to it?
Mark, N5OT
----- Original Message -----
From: "Scott McGrath" <mcgrath@fas.harvard.edu>
To: "Jim Tonne" <tonne@comcast.net>
Cc: <Amps@contesting.com>; "Vic K2VCO" <vic@rakefet.com>; "TMorton"
<cx7tt@4email.net>
Sent: Friday, October 03, 2008 8:33 AM
Subject: Re: [Amps] Transformer reliability? 34yr old Collins...
> You can bake it in a 175-200 degree oven for 6-12 hours and that will
> dry it out. Do this while XYL is out. Barring that get a pound or
> two of silica gel from a craft store and place it and xfrmr in a sealed
> container for a couple of weeks in a warm place (top of furnace) comes
> to mind
>
> The bakeout is still the best bet though.
>
> - Scott N1JIN
>
> Jim Tonne wrote:
>> Vic:
>>
>> What is the transformer part or model number?
>> Does the owner know what apparatus it came
>> out of?
>>
>> - Jim WB6BLD
>>
>>
>>
>> ----- Original Message -----
>> From: "Vic K2VCO" <vic@rakefet.com>
>> To: "TMorton" <cx7tt@4email.net>
>> Cc: <Amps@contesting.com>
>> Sent: Thursday, October 02, 2008 3:56 PM
>> Subject: Re: [Amps] Transformer reliability? 34yr old Collins...
>>
>>
>>
>>> TMorton wrote:
>>>
>>>> A local ham has a power transformer and I am considering using it to
>>>> power a 8877. I sent the serial numbers to the manufacturer, Johnson
>>>> Electric Coil Co and they answered that the xfmr was made in 1976 for
>>>> Collins Radio. My question is how reliable would this be after 32years?
>>>> What are the pros/cons?
>>>>
>>> If it is not potted and has been sitting in a damp place it may have
>>> absorbed moisture, which could cause insulation breakdown later. I am
>>> not sure what the best way is to dry it out, but someone will know.
>>>
>>> --
>>> 73,
>>> Vic, K2VCO
>>> Fresno CA
>>> http://www.qsl.net/k2vco
>>> _______________________________________________
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>>> Amps@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/amps
>>>
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