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Date: Sun, 20 Jul 2008 20:05:45 +0000
From: "Andy Talbot" <andy.g4jnt@googlemail.com>
To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF: Re: LF RadCom Articles
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Radcom redraw all diagrams anyway - and now with wiggly resistors.
Theyt tend to leave the text alone unless there are glaring errors or
bad English, so it looks as if you could be onto a winner.   Gives
Giles a shout.

Andy

2008/7/20 Ken <ken.h.wright@btinternet.com>:
> Hi Andy.
> A simple L C L circuit as described in the Solid State Design for Radio
> Amatuers Book, but I made the 'C' variable so I can tune it up in a similar
> manner to that of  PI tank circuit. I dont have any CAD for diagrams, all
> the pcb artwork was done by hand, I had a bit of techniacl smoke with the
> first PA a few dead power MOSFETS on the shack floor, but a chat with Chris
> G3XIZ and it was sorted out. Technical writing is ok as I used to write
> technical specifications and technical trial reports at BT.
>
> 73
>
> Ken    M0KHW
>
> ----- Original Message ----- From: "Andy Talbot" <andy.g4jnt@googlemail.com>
> To: <rsgb_lf_group@blacksheep.org>
> Sent: Sunday, July 20, 2008 6:44 PM
> Subject: Re: LF: Re: LF RadCom Articles
>
>
>> Send it in - sounds just like the sort of simple 'weekend' article
>> several technical editors have been asking for.
>>
>> btw.  By LCL output stage, assume you mean a lowpass Tee network?
>>
>> Andy G4JNT
>> www.scrbg.org/g4jnt
>>
>> design
>>>
>>> and build our own equipment, but do not submit it for possible
>>> publication
>>> because, state of the art technology it is not, the design is not
>>> particularly elegant, and the Technical Editor and the more accomplished
>>> contributors would fall over laughing when they saw it. But most of these
>>> projects are practical and they work. I work on the KISS (Keep It Simple
>>> Stupid) principle, don't use three components when one will work just as
>>> well. My 500kHz TX does not have any fancy CW sidetone circuit on
>>> transmit,
>>> just a piezo buzzer wired across the keyed 12v line to the driver board,
>>> the
>>> most complicated bit is the LCL output stage, which delivers 23W into a
>>> 50ohm dummy load and 900mA up the antenna, the TX/RX switching is like
>>> the
>>> old days, a simple toggle switch.
>>
>>
>> --
>>
>
>
>



-- 
Andy G4JNT
www.scrbg.org/g4jnt