Re: LF: Emailing: malk 107

[M0FMT <m0fmt@yahoo.co.uk>]

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

From: Graham <g8fzk@g8fzk.fsnet.co.uk>
To: rsgb_lf_group@blacksheep.org
Sent: Thursday, 28 June 2012, 20:20
Subject: Re: LF: Emailing: malk 107

Bit  of  Lemon Pledge  ?

From: mal hamilton

Sent: Thursday, June 28, 2012 8:09 PM

To: rsgb

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