[Novice-Rigs] RE: GB> Lowering FT-243 xtal freqs.

[Brian Carling]

Hello Hans!

Well there is some progress on the 6GW8 MOPA transmitter here finally!

It's going to use the design from 1964 Practical Wireless
7 Mc/s transceiver only with a Pi-network output tank, similar 
to the Mighty Midget by Lew McCoy.

I got the chassis out today and cleaned up the front panel
with "Goof Off" and "Greased Lightning."
I took off the label "Function Gen" that had been applied by 
the previous owner. Thankfully he never started on the project other 
than that and the chassis / case both look superb. Hammertone grey finish on
the front panel and the case. Bottom cover etc., and it is JUST the right size
for a single tube job (SMALL!) SO today I got starte and I mounted
the power transformer too! It is out of an old broadcast rx set
that had a 6GW8 or 6BM8 audio output stage, so the voltage should 
be just right!

I will post some pictures of the work on progress soon.
This will be a two band job for 30m and 40m CW I think.

I would like to make a 20m rig but that will require 3 stages
so that I can double from 40m crystals. Either that or use a
MOPA driven by a DDS VFO.

http://www.af4k.com/pwxcvr.htm
http://www.af4k.com/imag/ham/6gw8_1.gif
http://www.af4k.com/imag/ham/6gw8_2.gif
http://www.af4k.com/imag/ham/6gw8_3.gif
http://www.af4k.com/imag/ham/6gw8_4.gif


73s - Bry, AF4K



On 20 Jan 2005 at 10:16, Hans Summers wrote:

> 
> Yes Brian, and you know that pen - I bought it over 12 years ago! It is
> called a permanent pen and I use it to label aluminium front panel controls.
> It is ALMOST permanent, after some years and much use there is slight
> fading. When used on materials like PCB stock as I used for the chassis and
> front panel of my 1-valve TX, then it is REALLY permanent. Of course, I have
> used it for penning several different crystals too! Most pens have a
> lifetime of about 1 week, which is usually because that's how long it is
> before I lose them. I make almost a weekly pilgrimage to the stationary
> cupboard here in the office to grab a handful of biro pens (well we call
> them biro here in the UK - not sure what you call them), put them on my
> desk, and somehow they all manage to find new homes very quickly! But this
> permanent pen is kept safely and carefully in the most precious component
> tray container at my QTH ;-)
> 
> 73 Hans G0UPL
> 
> -----Original Message-----
> From: owner-glowbugs at piobaire.mines.uidaho.edu
> [mailto:owner-glowbugs at piobaire.mines.uidaho.edu] On Behalf Of Brian Carling
> Sent: 20 January 2005 09:48
> To: Sparkwireless at aol.com; glowbugs at piobaire.mines.uidaho.edu
> Cc: Sparkwireless at aol.com
> Subject: Re: GB> Lowering FT-243 xtal freqs.
> 
> 
> Why not use a pen? It has been done with success by our own G0UPL, Hans
> Summers:
> 
> http://www.hanssummers.com/radio/penning/index.htm
> http://www.hanssummers.com/
> 
> By the way Hans, if you are reading this, I use to know a Dave 
> Summers from Huntsville, Alabama about 20 years ago!
> 
> On 20 Jan 2005 at 1:57, Sparkwireless at aol.com wrote:
>  
> > Not a marking pen, use a real piece of soft lead like the strips that 
> > they put around stained glass
> > prior to soldering it.
> > 
> > Roy, KJ4TG
> >     I recently ran across a 7155 kc. FT-243 and wondered if it was
> feasible 
> >     > to lower it by, say 7.5 kc. I have tried the marking-pen route
> before, 
> >     > without much success, although it was only a half-hearted attempt.
> >     >
> > 
> >