And then there's the question of who works on all that complexity, and supports it in the long term? Amateur amplifier suppliers come and go. I think it's fair to say *most* amateurs aren't qualified
That is why a good automatic antenna tuner should be used. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
Agreed, but even then it takes a very good as well as fast tuner at reduced power at least to begin. It's better to to have an auto tuner that can be set up using an antenna analyzer. It remembers th
With my Palstar it memorizes frequencies via a freq counter and automatically tunes to the correct settings. I 'calibrated' it by doing lower, mid and high for each band. That works out fine. _______
Every one of those automatic tuners I have ever seen look like they'd melt down with a 300 or 400 w. carrier. Bob, I decided you are completely correct about solid state. If you happen to have any ex
Bravo, Jim. Interestingly, Elecraft showed a PA-1500 at Dayton for several years, and I know they had at least one out for field test. It had a flock of super features, including very fast band-chang
Jim, Based on my experience, I agree with your comments above. First, the solid-state amps I've used are not very power-stable with PA deck temperature. In the broadcast industry, output power must
that's not new. Tube ham amps have been built tiny now since Dentron started doing it. The only reason is the average consumer electronics ham wants a small quiet amp because he does not understand
Perhaps it is just my frugal nature but, $2K+ for a 500W amp is nuts to me! For the money a new AL-80B with a few tweaks to fix the excess fil voltage issue would probably run forever if you limited
Look at Palstar. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
Depending on modes used, amps today need to do more than older amps. Back when the power limit was 1 KW input amps had to produce nearly half the power that modern amps do. 1500 W out with RTTY, Cw o
Paul It was on this board a while back that someone commented that any amplifier built to be on a desk top was not going to be gutsy enough to do constant power modes indefinitely (or words to that e
I've had a Palstar HF-Auto for about six months now, and so far, no arcin' or sparkin' at the legal limit into some fairly ugly loads, particularly on 75/80m where I have an inverted vee cut for the
Palstar has a high rate of failures. They couldnt make an amp either. Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailm
There were plenty of old amps run on CW at "2000W PEP" at 1200-1300W out and many never broke into a sweat either and were capable of more. It was the SB-200 and 220 that brought the wimpy PS and eve
It is all about size and weight. A modern SS amp could dispense with the power transformer, though, a reduce both those limitations. _______________________________________________ Amps mailing list
Mine runs just fine. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
My desktops aren't really desktops. they are full size tower cases with multiple core CPUs running well above 3 GHz. These cases are big and heavy. Each one has 3 140mm fans in front cooling the HDs.
Which is a plus for tubes. And the protection circuitry for a SS amp is extremely elaborate. Add to that the aging of the transistors. On an hour by hours basis, transistors "operated well within the
No, it's exactly what I expect out of a tube amp, and I have one that will do it. So it's a valid comparison if I want the same thing out of SS. I don't want a 1200 watt amp that has to be derated fo