[Amps] SWR increase on SB-220 input - my face is red

[Carl]

New sockets arent that expensive but the frugal ham could swap the complete 
piece with one from the 3 grid terminals. Then clean and tighten the old one 
for another 40 years.

The main thing is to keep the fan working at full speed and not block any 
air flow as Ive seen often in fancy wood shelving with barely enough room to 
fit the amp and butted right back against a wall.

Carl
KM1H


----- Original Message ----- 
From: "Vic K2VCO" <k2vco.vic at gmail.com>
To: <amps at contesting.com>
Sent: Tuesday, May 01, 2012 7:53 PM
Subject: Re: [Amps] SWR increase on SB-220 input - my face is red


>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 at contesting.com>
>> To:<Amps at 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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>
> -- 
> 73,
> Vic, K2VCO
> Fresno CA
> http://www.qsl.net/k2vco
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