[Elecraft] KPA 500 Hum

[Wayne Burdick]

We're looking into this.

73,
Wayne
N6KR

On Aug 1, 2011, at 3:11 PM, Lothar Sack wrote:

> The same hum here since I changed to the *RED TAP (211 to 230V).*
> I had _no hum with the YELLOW TAP (231 to 250 V)_. But then I had less
> than 60V with full power.
> The hum is coming out of the KPA500.
> What to do?
> Lothar, DJ8EW
> K3 1300 + KPA500 229
>
> Am 01.08.2011 09:33, schrieb Klaus Koppendorfer:
>> Last week i assembled the kpa500 of oe6rdd
>> when we transmit we hear a realy loud hum (50hz) in the rythm of  
>> the cw signals
>>
>> i have compared this with my own kpa-500 and there is no hum
>> i have tried to loosen the big srew which holds the tranformer with  
>> no result
>>
>> any ideas ??
>>
>> 73
>> Klaus
>> OE6KYG
>> KX1 244
>> K2 1331
>> K3 115
>>
>
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