Just so there is no confusion here, the suppressor is not designed to work
from 1.8 MHz to 30 MHZ. it is designed to suppress or dampen the plate
circuit at the most probable parasitic frequency. Usually in the 120 MHz
range, depending on tube type. This type of suppressor will usually show
some heat when operating on 10 meters due to the amount of inductance
required for it to suppress the parasitic frequency but you would still use
the same suppressor if you were only building the amp for 1.8 MHz.
73
Gary K4FMX
> It is not an easy job to design a parasite suppressor that work
> from 1.8 MHz to 30 MHz. You need a good amount of inductance at the low
> frequencies, but very little at the high HF frequencies. More times, than
> not, if you have stuffiest inductance on 1.8 MHz, you will have way too
> much
> at 30 MHz. This produces excess heat and usually causes the resistors to
> overheat, and often causes them to burn up. Does this sound familiar?
> Your
> suppressors work great on the lower bands, but overhear and burn up on 10
> meters? This is why the loop suppressor were designed, about
> thirty
> years ago (you may remember, Richard offered kits with these anode
> suppressors for several years) . They were easily adjusted for the best
> overall performance before being soldered parentally.
>
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