> Rich said:
>
> "813s don't need a VHF suppressor because they are pushing
> the limit
> at 28MHz."
>
> On the contrary, I remember seeing a single 813 amp for
> 50Mhz in a handbook
> somewhere. Also, my problem was spur generation in the VHF
> region. Now
> whether other components were involved with this, I don't
> know. I do know
> that the spurs were eliminated after the nichrome
> suppressors were
> installed.
That's exactly opposite the truth anyway.
The most stable tubes are those with the highest operating
frequency limits.
73 Tom
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