In reference to the ALC thing, I quite using an ALC line a bunch of years
ago when an old Tube rig ( ft 101ee I think) was running into a Tube amp ( I
think a Clipperton L) and the alc would cause the amp to motor boat, on TX.
After a couple of different trys at a fix, one fellow on the air said he had
the same problem a while back and just disconnect the ALC.
I did that and it ran fine from there on out. I haven't hooked on up since.
BUT what I do is on a manual tune amp, take it up to max smoke, then back
the input down 5 watts or so. that way the amp is in resonance, but not trying
to melt the plates.
with the alpha 87 a I just run it legal power or less. ( It will do well
over 2K in a dummy load) and usually drive it at 1K .
I am also aware that I have no ALC on the linear to rig loop so I tend to
watch it a bit more. 47 watts from the Orion will do better than 1k on the
and the grid current stays well down in the "green" range.
works for me, for what ever that is worth.
appliance operator extraordinair !!!
BTW I have had probably 3 clipperton ls, and amp supply 1000nt, a couple of
ameritron 811's and 811 H's, a bunch of sweep tune amps , a couple of IC
2-KL's, an alpha 76A, 2 als 500's, an als 600 and a bunch of brick for HF and
2/440 and 6 m.
In a message dated 7/18/2006 8:09:12 A.M. Pacific Daylight Time,
There is an ALC setting, its for power output. The manual says ALC sets
the power output whether 1 watt or 100 watts. That compensates for the
varying gain of the transmitter circuits from 160 through 10 meters.
Then that not allowing for a gain setting to hit the ALC limit softly is
the software problem, not as others have described it.
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