[Heathkit] SB 220 on AM

[jeremy-ca]

It works fine on AM. With 25W drive the output will be around 350W, well 
within the tube ratings for 33% theoretical efficiency.
For best linearity load to max output and then load even more until output 
just drops a tad.
Do the final touchup of the mike control on the air for best audio without 
splatter.

Carl
KM1H


----- Original Message ----- 
From: "David Rose" <w4dja at hotmail.com>
To: <heathkit at mailman.qth.net>
Sent: Saturday, September 02, 2006 10:15 AM
Subject: [Heathkit] SB 220 on AM


>
>   I  have a Yaesu Ft 990 and I want to do some AM work just for fun. The
>   990  puts out 25 watts on am. Can an SB 220 be used on AM? I was going
>   to  buy  an AM rig at the Shelby Hamfest today, but they are very high
>   priced  ( I think) and I would have to purchase lots of other parts to
>   make a station operative. Maybe with more power and a higher antenna I
>   cud work some AM with what I have.
>   Thanks
>   Dave
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