[Heathkit] SB-200 @ 50 Hz

[Donald Spoon]

 From the dim recesses of my mind I seem to recall my EE Professor (in 
1963) saying a 50 Hz transformer has higher "core losses" than a 60 Hz 
transformer. This results in the 50Hz transformer having more iron to 
handle the increased heat generated from these losses.  The higher the 
frequency the lower the losses and the smaller the transformer.  Some of 
those 400Hz aircraft transformers are tiny compared to the same one in a 
50HZ or 60Hz version.  Practically speaking the difference between a 
50Hz and a 60Hz transformer is miniscule for the sizes we Hams deal with.

Now I have never owned a SB-200, but I bet that it will work OK on 50HZ 
as long as the Transformer temp was under control.  SSB and CW should 
work OK, but RTTY and some of the continuous Digital modes, like Domino, 
should be watched carefully.

This is the only caveat that I can think of right now if you want to 
try.  Perhaps some of the transformer companies, like Hammond, could 
provide you a better answer?

Cheers,
-Don- K0APK



On 2/29/2016 1:16 AM, manualman at juno.com wrote:
> Interesting, on page 4 of the SB-201 manual under Introduction, it says
> 50/60 Hz, yet on page 44, under Power Source, it just says 60 Hz.
>
> Personally, I don't see where 50 or 60 hertz would make that big of a
> difference relative to the power transformer. The fan motors in both
> amplifiers also use the same part number AC fan.
>
> Pete, wa2cwa
>
> On Sun, 28 Feb 2016 23:32:11 -0600 Ken <ken at wa0sbu.com> writes:
>>          Interesting, on page 4 of the SB-201 manual, it specifies
>> "120
>> VAC or 240 VAC 50/60 Hz lines."  They both use the same 54-151 Power
>>
>> Transformer.
>>