>
>> Hang on a sec ... The SB-220 was rated at 1000W input on CW because that
>> was the legal limit at that time. I have run mine in SSB position for 3
>> years so far, in heavy CW and phone contesting, and it has shown no
>> problems at from ~950 watts output on 10 to 1250 watts on 80. I've kept
>> careful watch on the temperature of the power supply, color of tube
>> anodes, etc. and everything seems quite comfortable.
>>
>> 73, Pete N4ZR
>
>That's because it has headroom in the components. Technically,
>the transformer is a tad small and the cooling is a bit marginal for
>1000 watts out.
>
Provided that the 220's fan motor bearings are occasionally oiled, the
red ink on the 3-500's typically remains in virtually mint condition.
>...
end
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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