Hi Colin
When I was using this amp it didn't have a tuned input. I was using a
Yeasu FT-102 to drive it and it had the pi-net so didn't bother with the
input tuning.
I had a power transformer out of an old Navy TCM-2 tranmitter and that amp
would put out a KW easily. Might have to dig it out sometime and see what
I've removed from it over the years :-) 73.
Tom W7WHY
On Tue, Dec 22, 2015 at 6:53 AM, Colin Lamb <k7fm@teleport.com> wrote:
> Hello Tom:
>
> That is not true. It depends upon whether they are grounded grid or grid
> driven. Grounded grid is a bit cleaner. The tube is fine as long as it is
> not pushed beyond reasonable limits. But, that is the same with any tube.
>
> Sometimes they are run in grounded grid mode with no tuned circuit in the
> cathode. That makes them dirtier, because the "flywheel" in the cathode
> adds up to 5 db improvement in the imd results, just the same as for any
> other tube.
>
> It is still a good tube.
>
> 73, Colin K7FM
>
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