Topband: SB-1000

[Tom W8JI]

> Thanks to all. I will go over it again today. I initially started out on 
> 160 and then moved on to other bands. On 160 I could not get any increase 
> in grid current, it came up but no increase with plate tuning but may not 
> have applied enough drive. Staying below the 200ma grid and 400ma plate 
> and just shooting for 500-600 watts on all bands right now. I did go over 
> the switch before using the amp and it looked good and also deoxit it. The 
> only thing I changed was 115v to 220. Probably just operator error since 
> it's been a while doing any maxing and dipping:)Jimk2hn
> _________________


A pi-L also tunes a little weird.

In a normal pi, the plate tune hardly moves with load changes. In a pi-L, 
the plate tune and load interact. But either has to be tuned near rated 
power.

Don't bother spraying a band switch that carries several amperes and 
thousands of volts. It never really does good, and it might do bad. Save the 
deoxit for volume controls and things that only have a few volts and a few 
mA current.