SB-220

[peter A markavage]

If you're going to be running a DX-100B or the Apache in the near future,
why bother trying to run the SB-220 on AM. Both rigs provide ample AM
signal presence. If you're running a current solid state transceiver on
AM, the use of an SB-220 or SB-200 does provide the additional shoes you
need for AM. Trying to use a DX-100B or Apache to drive an SB-220
requires resistive pads to drop the drive to useful levels, or rewiring
the final plate and screen voltages to run off the low voltage supply.
Adjust of the front panel drive control won't work to lower the drive
requirements to the linear.

Pete, wa2cwa

On Thu, 23 Sep 2004 11:15:13 -0500 lgrindel <lgrindel at MAIL.EV1.NET>
writes:
> Greetings Guys,
>   I was wondering if anyone in the group has any experience or
> advice on using an SB-220 amp for AM operation. I have heard it is
> o.k. if you keep the drive down, so you are only putting out 200
> or 300 watts. I am using a DX-100B, and soon an Apache. Any help
> or advise will be appreciated, those tubes are way too expensive
> to do something stupid. Thanks in advance
> 73
> Larry Grindel  KD5ECG

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