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Already been done and on the market for two years.
Tokyo High Power HL-2.5KFX @ exactly 3x the price ($6K).
1500 watts from a pair of Microsemi ARF-1500 MOSFETS, rated for 1800W
dissipation between the two.
Array Solutions sells them, and the cable
Already been done and on the market for two years.
Not quite what the KPA-1500 promised -- the HL-2.5KFX does
not support SO2R or six meters.
73,
... Joe, W4TV
On 4/10/2011 7:51 AM, R. Kevin Stover wrote:
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Already been done and on the
Are you suggesting that Elecraft buy Tokyo High Power or copy their amplifier?
Seriously. Be patient. I'm sure that any 1500w solidstate amp made by Elecraft
will be far advanced of what is available from other manufacturers now.
Tom
N5GE
On Sun, 10 Apr 2011 06:51:06 -0500, R. Kevin Stover
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On 4/10/2011 10:13 AM, Joe Subich, W4TV wrote:
Already been done and on the market for two years.
Not quite what the KPA-1500 promised -- the HL-2.5KFX does
not support SO2R or six meters.
73,
... Joe, W4TV
I don't remember seeing
Not quite what the KPA-1500 promised -- the HL-2.5KFX does
not support SO2R or six meters.
dream
Two of these, MRFE6VP61K25H, should do the trick...
/dream
vy 73 de toby, DD5FZ
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Elecraft mailing list
Home:
I don't remember seeing Elecraft promise anything in regards to a
KPA-1500.
The specs were for 1500 watts, 160-6m and SO2R support.
Someone saw a prototype at a Hamfest two years ago and most
everybody assumed it would go into production.
A lot of people saw prototypes of KPA-800 and
Nice for pulsed or CW devices. How about specs for AB1 service
including standing current and IMD? Standing current (bias) is
critical for heat sink/cooling design. IMD capability is crucial
to how clean the amplifier will be.
Other than those minor considerations, a pair of 900W amplifiers
The spec sheet seemed to indicate the devices can be biased for
linear operation. But with over 20dB gain, the devices would have to
be reined in a bit for USA use. Looks like a pretty rugged device:
Capable of Handling a Load Mismatch of 65:1 VSWR, @ 50 Vdc, 230 MHz,
at all Phase Angles,
I owned a THP 1.5 for a short time. Terrible reliability. After
numerous board swaps and being told there was something wrong with my
house power I returned it. They looked nice. I will never own another
THP product again.
In short, I do not believe the THP quality is anywhere near what
Nice for pulsed or CW devices. How about specs for AB1 service
including standing current and IMD? Standing current (bias) is
IMD could be better http://www.qsl.net/f1jrd/800wR.JPG at least on
144MHz.
Graph taken from http://www.qsl.net/f1jrd/MRFE6VP61K25H.html.
FWIW, Freescale claims that
IMD could be better http://www.qsl.net/f1jrd/800wR.JPG at least on
144MHz.
-35 dB doesn't look too bad compared to a lot of the stuff out there
today - even if it is a PEP (ARRL) measurement. If it is referenced
to one of the two tones, it's significantly better than most of the
currently
Several years ago at the Elecraft stand in Dayton I saw a prototype
1500-watt solid state amp. At the time I understood from the folks
there (and maybe from some e-mails) that it had been built using some
high-power transistors made by a company in Oregon (I think) with which
K4XU is/was
In a recent message, Pete Smith n...@contesting.com writes
Might it be feasible to build and sell a 1500-watt amp for
something approximating three times the cost of the KPA-500?
By all means have a go at building one, Pete, and let us know how you
get on.
There would be very limited demand for
There would be very limited demand for a higher power PA outside the
USA if Elecraft produced one.
It might be just right as a driver for some of those I and other
northern Mediterranean amplifiers.
73,
... Joe, W4TV
On 4/9/2011 11:37 AM, David Pratt wrote:
In a recent message, Pete
To: Elecraft List
Subject: [Elecraft] Yet another product idea
Several years ago at the Elecraft stand in Dayton I saw a prototype
1500-watt solid state amp. At the time I understood from the folks there
(and maybe from some e-mails) that it had been built using some high-power
transistors made
: Saturday, April 09, 2011 9:38 AM
To: Elecraft List
Subject: Re: [Elecraft] Yet another product idea
In a recent message, Pete Smith n...@contesting.com writes
Might it be feasible to build and sell a 1500-watt amp for something
approximating three times the cost of the KPA-500?
By all means have
I'll second that!
On 4/9/2011 10:21 AM, Pete Smith wrote:
Several years ago at the Elecraft stand in Dayton I saw a prototype
1500-watt solid state amp. At the time I understood from the folks
there (and maybe from some e-mails) that it had been built using some
high-power transistors made
I enjoy QRP Give me a KX1 that does 20, 15, and WOW, 10
mtrs! The 80mtr end
is of no use, push it up to some real low power QRP bands. Then a handheld 2
watts would
be incredible! And maybe options for 17 and 12 mtrs.
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