On Fri, 11 Sep 98 08:20:52 -0800 Rich Measures <measures@vc.net> writes:
>
>
>The designers rather obviously did not bother to read the RCA
>Transmitting Tube Manual. In stock config., the amp. is potentially
>an
>8122-screen-assassinator.
No argument...what was designed was not what Mike Ferber ( National
Marketing VP) forced on the market.
If you are interested, I can mail you a
>copy
>of a schematic with needed changes.
I tried them...they dont work. If you have recent upgrades I would also
appreciate a copy.
With some changes and run in AB1
>instead if AB2, the NCL-2000 is clean enough to avoid being tarred and
>
>feathered at the next DX convention.
It takes nothing except resetting the bias AND watching the grid meter to
make the NCL an almost clean amp with -28dB 3rd IMD even with the
unregulated screen supply. Adapting the G3SEK screen regulator makes a 35
yr old amp acceptable by modern standards. I run 1200W out on 6M with
not even a tickle on the grid meter. Measured 3rd order is -32dB.
73 Carl KM1H
>
>- later, Dick
>
>
>Rich...
>
>R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
>
>
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>
>
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