Hi Jens,
I will never sort the problems with Ray. I have sorted all the problems by
myself after 6 and or 7 failures of the device (I have two pieces). Just a
small remark. Take universal multimeter and measure the DC voltages (both
idling and operating) on cathode, and both grids. Than go to the
www.svetlana.com and download the data sheet for the 4CX800 and than make your
own decision. What I have done is - I have redesigned the whole control board
and switching and cathode circuit. So what was left is the box, PI tank and
transformer, everything else is replaced. There are for instance zener diodes
in parallel two GRAETZ rectifiers (one for + and other for -) in parallel and
other similar examples of smart and knowing engineering.
Have fun
Jiri
OK1RI
----------
From: JER Jens Röhme
Sent: 17. února 1999 8:12
To: 'jirka@jimaz.cz'
Subject: Regarding your QRO 2500dx
Hi Jirka,
Just read your article regarding your experience with QRO. Im also an owner
of a 2500dx and bought i last year used through the internet. When I tried
it out, I also had problems with the swr between the station and the amp -
even with antenna tuner, the swr on 10, 17 and 40 was unsatisfactory. I
called Ray at QRO and told him about the problem - and we agreed on that I
should send the amp to him for an upgrade. I received the amp 2 weeks after
it was sent (he paid the shipping from the US) and it was like having a
totally new amplifier! My swr problem was gone and the tuning on 160 was
suddenly a breeze (was quite hysterical before).
So bottom line I have no complaints whatsoever about the service and the amp
itself - the problems you are mentioning are unknown to me. I discussed it
with a swedish ham also an owner of a 2500dx - nil problems there. I guess
you ran into som serious bad luck there, and from what iv'e heard about QRO
it does not at all match your experience.
Well Jirka, hopefully you and Ray are going to sort out the problems.
Regards and 73's......Jens / OZ1EEZ
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