[Amps] sb-220 on 17 meters

[Jan Erik Holm]

peter wrote:
> I recently aquired a sb-220.  When I try to tune up the amp on 17 meters
> using the 15 meter band switch I get only 300 watts out and both tubes
> really are working hard.  I get 1kw out on 15 meters and 20 meters.  Is
> my plate choke resonating about 18 mhz ?

No, not if it´s the original Heath choke.
However if I don´t remember wrong I have the band switch
in the 20m position when I use it on 17m, you might just
check it out.
No problem to get 1 kW out on all the WARC bands.

> Any help would be appreciated.
> Peter
> KC0NYG

73 SM2EKM