I have a KPA1500 . One of the first ones built, ran perfectly until earlier
this year, when without reason it went from 1400 watts to 700 watts while
running CW, NO WARNING. The LDMOS DIED.. Returned to the factory for
repair, cost me $718 plus my shipping costs. After about 12 weeks I
received
Mine has worked flawlessly for the year or so that I've had it. I've
pushed it pretty hard and for pretty long durations with some digital
modes, as well. So far, so good.
Tim
On Mon, Oct 31, 2022 at 3:18 PM Frank Scolaro
wrote:
> Of the 5 people I know with the KPA1500, 3 of them have made
Of the 5 people I know with the KPA1500, 3 of them have made a return trip for
LDMOS failure. Also had my RF-Kit blow up twice. Will have to fix my old
Henry 3k!
Frank W2YK
-Original Message-
From: Wes
Sent: Oct 31, 2022 6:02 PM
To:
Subject: Re: [Elecraft] KPA1500 RELIABILITY
In
In my modest station (120V 20A) I run a KPA500, which has been fine, if noisy.
If I was to QRO I think I would opt for tubes. Less expensive, more reliable,
better linearity and quieter.
Wes N7WS
ps. Thanks for the J68HQ Qs
On 10/31/2022 1:40 PM, Dr. William J. Schmidt wrote:
---
Hi William,
Is the station using this amplifier operated in person, or remotely? If
remotely, what operating conditions are being monitored by the remote
operator? What "traps" are provided by the control circuitry to prevent
an operator from doing something dumb? This is one of the things I
My KPA1500 just blew up for the third time... gonna go back again. Forced
us to run LP in CQWW this weekend as it exploded just two days ahead of the
contest. No reason for the explosion that I can tell... radio worked fine
on the antenna system without the amp after the explosion.
Previously
I have a K4-D-F Serial #0492 For Sale with almost zero use. Still has plastic
protection over the display!! It was ordered June 2021 and delivered January
2022. It stayed in it's sealed factory box for 8 months as I was up in New
York.Only 3-4 QSO's made. Comes with the factory box and packing,
We carried on despite the CQWW contest. Thanks to those who took a break from
the contest to join us on the net. Under the heavy QRM the relays, NS7P, N6JW,
WM6P and N8SBE were a tremendous help. Please join us next Sunday at 1800Z on
14.3035. The following stations participated this week.
Good Evening,
Conditions were better than last week. There was some rapid QSB on
everyone. I scanned twenty meters before the first net. There was one
DX pileup with a few casual contacts but not much more.
It is rainy and cool along the coast. Fall colors are fading in the
Midwest
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