[Amps] SB-220 troubleshooting

[Pete Smith N4ZR]

Ah good thought - I have KM1H suppressors in, replaced about 10 years 
ago after I tore out the nichrome.

73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
ARC V6 or VE7CC DX cluster node.

On 12/13/2014 8:34 AM, Louis Parascondola wrote:
> Could be tubes but if you never replaced the old parasitic suppressors 
> it just may be time.  That should be done regardless.  I actually have 
> some NOS 47 ohm resistors and am making clone suppressors  of the 
> originals. That should keep you good for the next 30 years.
>
> Sent from AOL Mobile Mail
>
>
> -----Original Message-----
> From: Pete Smith N4ZR <n4zr at contesting.com>
> To: amps <amps at contesting.com>
> Sent: Sat, Dec 13, 2014 06:57 AM
> Subject: [Amps] SB-220 troubleshooting
>
>
> My venerable SB-220 is displaying some odd symptoms.  On 10M, for
> example, the Tune setting for maximum output has changed substantially,
> and the output power is down about 150 watts.  There are smaller
> changes, progressively less serious, as I step down through the bands.
> Is it likely that the current pair of 3-500s is failing, or should I be
> looking somewhere else in the amp?
>
> -- 
>
> 73, Pete N4ZR
> Check out the Reverse Beacon Network at
> http://reversebeacon.net,
> blog at reversebeacon.blogspot.com.
> For spots, please go to your favorite
> ARC V6 or VE7CC DX cluster node.
>
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