>
>
>
> Dan says:
>
> > normally load "heavy" to reduce grid current after full output tune.
> Power
> >out suffers only 25-50 watts.
> >This must be where the improved IMD comes from.
>
>If you are winding down the drive to get down to the legal limit, the
>improvement in IMD because of less swing dominates.
indeed. For a tetrode with handles amplifier, backing down the mic. gain
puts the amplifier in ultralinear Class A operation. If you don't need
full suds to communicate, it's the right thing to do. However, if anal
retentive / anal expulsive jammer-guys show up, you can pump it up.
>Underrunning a big amp
>in this way should help reliability, life (tube and other parts) and IMD.
>What the marketeers call 'a win-win situation'.
>
In my opinion, it's tempest in a teapot. Does it really matter if one's
signal strength decreases or increases by one S-Unit as long as one is
not interfering with a neighbor who is trying to phone 911?
- Buying a too-large amplifier and throttling it back is like buying a
new Porche 911 and blocking off the air inlet so as to limit the top
speed to 55-mph instead of 174-mph. I think I'm gonna puke.
- cheers, Pete
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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