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Pete
I got some fb reports from AA1A in the USA. We used to
work xband, he would reply on 7033 Khz, the same from Moscow stns.
This was in the early days of 500.
I only work QSO mode and no Beacon thrashing.
All transmitters need tweaking and matching to Antenna.
Adjusting a class E transmitter takes a few minutes if constructed properly
for the design frequency.
73 gl de mal/g3kev
----- Original Message -----
Sent: Thursday, June 28, 2012 8:36
PM
Subject: Re: LF: Emailing: malk 107
OK Mal
Thanks for the advice. The GW3UEP was the answer to the Unobtainium
issue. Every bit could be obtained from Maplin. Not semi professional Amateur
with component access through the "Company", you can see that in the LF HB. It
would be nice just to take a High power design that is "Surefire" build
it and have it on the air with out a process of tweaking and tuning and bits of FET
ricocheting round the shack before you finally tame it. I think I am almost
there doing it empirically.
That's what I am hoping with Stefans design but
the ferrite "Black magic"...... +
Oh and your big sig in Moscow is more a function of your big
antenna..... yes?......... :o)
73 es GL Pete M0FMT IO91UX
Bit of Lemon Pledge ?
Sent: Thursday, June 28, 2012 8:09 PM
Subject: LF: Emailing: malk 107
Pete es co
The 500 Khz rig that I built in a couple of hours. Components from
the junk box. The FET driver in this case was a complimentary pair of
transistors.
Class E single ended one FET.
At the start I used a xtal osc then changed to the IC706 as an exciter, a
couple of diodes to SQ the sinewave.
The tank cct inductor is an old WW2 ceramic ex TU7B tuning
unit.
I put a good signal into the USA es Canada es Moscow with
this transmitter on CW.
73 de mal/g3kev
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