[Amps] Transformer 50/60hz

[Carl]

In the USA most commercial ham amps have been shipped to 50Hz countries 
without a problem, even the SB-220. Some have reduced power caveats and 
others are built with enough iron to work 50/60 Hz.

If anyone has a problem with my prior post I would have at least expected 
them to read the Alpha manual before flapping off. Alpha offers no caveats 
at 50Hz, I play it a bit more conservative when first trying things.

Carl
KM1H




----- Original Message ----- 
From: <vk3pa at vk3pa.com>
To: <amps at contesting.com>
Sent: Friday, April 23, 2010 6:45 PM
Subject: Re: [Amps] Transformer 50/60hz


> Quoting Carl <km1h at jeremy.mv.com>:
> 60hz t/former has less iron in the core causing saturation . on some
> of the yaesu t/f for 60hz when run on 50hz they burn out after a
> couple of years.. its ok to run 50hz t/f on 60 but not the other
> way.in aircraft they use 400hz es less iron still.. even running low
> power on the amp the priamy is still satueating on the t/former
> causing heating "not very good"..
>
>> The transformer will run a little bit warmer so dont push the amp to the
>> last watt. The blower will also turn slower so find a happy balance with
>> your output power and air flow.
>>
>> Dont waste your money on a new transformer, if you ever need to just get 
>> the
>> original rewound locally.
>>
>> Carl
>> KM1H
>>
>>
>> ----- Original Message -----
>> From: "John E. Cleeve" <g3jvc at jcleeve.idps.co.uk>
>> To: <amps at contesting.com>
>> Sent: Friday, April 23, 2010 3:18 PM
>> Subject: [Amps] Transformer 50/60hz
>>
>>
>>> Gentlemen,
>>>
>>>
>>>
>>>             I would appreciate some advice from the transformer 
>>> "boffins"
>>> out there. I am in process of refurbishing an Alpha 76PA, which came 
>>> over
>>> from the USA. I noted, in a recent posting, a link which showed the new
>>> Dahl
>>> transformer availability, and that a 50hz 230v primary transformer is
>>> available for the 76PA. My questions  are these, what are likely to be 
>>> the
>>> noticeable effects on the performance of the 76PA amplifier, with the
>>> present 60hz transformer being run on 50hz and what, if any, will be the
>>> likely long term effects on a transformer designed to run on 60hz when 
>>> run
>>> on 50hz. Should I "break the bank" and have the available 50hz version
>>> shipped across the pond?
>>>
>>>
>>>
>>> 73, sincerely, John. G3JVC
>>>
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> Amps mailing list
>>> Amps at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/amps
>>
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>
>
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