I would also replace the springs that clamp the filament pins. The heat weakens
them and
then it's a vicious cycle.
On 5/1/2012 3:03 PM, Carl wrote:
> I believe Ive mentioned many times that operating WARC is best done in the
> CW position with that amp and around 750-800W. The fan should also be kept
> clean as well as the motor cleaned and lubed.
>
> Clean any blackening off the socket connections.
>
> Carl
> KM1H
>
>
> ----- Original Message -----
> From: "Pete Smith N4ZR"<n4zr@contesting.com>
> To:<Amps@contesting.com>
> Sent: Tuesday, May 01, 2012 5:37 PM
> Subject: Re: [Amps] SWR increase on SB-220 input - my face is red
>
>
>> Took a look inside the top of the SB-220, and sure enough - I've melted
>> the filament out of the pins on the left-hand 3-500. No wonder the
>> input SWR is off...
>>
>> 73, Pete N4ZR
>> The World Contest Station Database, updated daily at
>> www.conteststations.com
>> The Reverse Beacon Network at http://reversebeacon.net, blog at
>> reversebeacon.blogspot.com,
>> spots at telnet.reversebeacon.net, port 7000 and
>> arcluster.reversebeacon.net, port 7000
>>
>>
>> _______________________________________________
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>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>>
>>
>> -----
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>
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--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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