[Boatanchors] SB-220 in AM service

[William Kipping]

Greetings Anchor People

The Heath SB-220 in the shack is seldom used and I would like to use it in
AM linear mode with  low power exciters such as the Heath DX-60, Knight
T-60, HT-32 / 37, HX-500, WRL DSB-100 etc.  As its rated for 1KW CW RTTY
(10 Min max) I thought that 250W input on AM should not stress the power
supply or tubes, in the low power position (graphite tubes) At 60%
efficiency that should be approx. 150W rf output. Any thoughts from others
who have used the Amp on AM ?  Thanks for your input  Bill KE7KK SD