Topband: Heathkit SB-1000

[Tom W8JI]

> Anybody know how to make an SB-1000 tune properly on 160? Ok on other 
> bands but doesn't like 160, dummy load or well tuned Inv.L. Is it a quirk 
> of the amp needing a modification or possibly a bad component? Saw nothing 
> obvious before putting it to use but have not had the cover off 
> since.Thanks,Jimk2hn
> _________________

The SB1000 is the same as an early AL80A. It hits the 160 band perfectly as 
long as it does not have a component off value or a wiring error. The tank 
was unchanged all through the run of the AL80A up until the 80B was out.

Which control is bottoming out? The plate or the loading?  How much power 
are you trying to run when tuning it?