Ken-
Did you get the Combiner/Split for an existing amp?
I'm looking at obviously not duplicating the 4O3A design in SO2R amps,
and have been resigned to the fact that i'll probably operate two amps
for SO2R... but I am looking at building at least *one* amp that is SS
for my shack. That is the pinnacle here, of finally operating an amp
that performs well in a contest and being able to say "I built/assembled
it myself". And being able to troubleshoot any faults that may occur.
There's been a lot of talk about LDMOS amps, and I'm genuinely
curious... I have resonant ants for 40/20, but on 80, my seasonal
antenna is fairly resonant but narrow bandwidth (3.5-3.68) before the
SWR jumps. I've seen some videos of the LDMOS variant amps taking a 3:1
rating (obviously not at RTTY levels) but it has piqued my interest.
Even my 76PA has "appeared" to tolerate my momentary excursions up to
75M, but I know that the reflected power is just eating away at the
tubes. Probably even more so with transistors.
I know the answer is to get resonant antennas, which I have done.. I'm
impressed with my Alpha 76PA in the fact that it has dealt with me at
3AM mistuning the thing and it still works like a racehorse.
On 4/28/2017 11:00 PM, Ken K6MR wrote:
I bought the combiner/splitter assemblies made by W6PQL for my dual
KPA500 project. High quality boards and they work great. The amp
pallets look like they are the same high quality. I’m just too lazy
to take on a project like that.
He did an update on the filter design that has better harmonic
suppression for the high power model.
Ken K6MR
*From: *WT2P - CJ Johnson <mailto:fredwt2p@gmail.com>
*Sent: *Friday, April 28, 2017 8:37 PM
*To: *amps@contesting.com <mailto:amps@contesting.com>
*Subject: *Re: [Amps] Amps Digest, Vol 172, Issue 92
Can we get back to the topic(s) at hand, namely building/repairing amps?
I, for one, am very curious about the new SS amp line(s) coming out and
researching as much as I can about the W6PQL designs and would like to
hear more about the merits of that design and some advice for budding
builders who want to experiment along that path.
Or is this going to devolve into an online version of 7.200?
Thanks,
WT2P
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