Looks good, no, very good. Better than my home made transmitters.

On the schematic, you missed a strap on the doubler coil. The ground pin
should be connected to the nearby "coil" pin. I didn't go over the
schematic in detail but I was interested in how you connected the
doubler coil.

Bill K7NOM
exray wrote:
Hi,
I've gotten far enough along with this project to where I'm ready to
toss it out for public scrutiny, so have at me, guys.

I'm a receiver guy - never built a tube transmitter from scratch and
this is my first go. My goals were, in no particular order, to build
something with a early 30s breadboard look, xtal control, 40/20 meters
primarily - 80/30 as bonus, moderate power for getting on the air
barefoot while not overpowering a future amp idea...and of course
using accessible parts.

This is sort of my compilation of ideas from old QST articles. Robbed
ideas from this and that to make them fit. I made some major boo-boos
at first but I think I finally have them sorted out. Something that
dawned on me a little bit slowly is that none of those old xmtrs were
set up to operate 40 meters with a 7 Mc xtal. Much of the emphasis
was on double this/double that. Nowadays we have 7 and 14 Mc
fundamental xtals abounding so I went the route of reinventing the
wheel so to speak.

The rig is working at this stage...at least straight thru on 40.
Waiting for some other bits and bobs to carry on to other bands. The
note sounds good and its nothing I'm reluctant to put on the air. On
the other hand its a massive amount of wood and metal for a measly 5
or 6 watts A little slatboard 6V6 chirper would have been much
easier.

Anyway, I'm not a veteran with old xmtrs so I'm putting it out for
comments, questions, critiques, etc. Flame suit is handy!

Schematic:
http://i132.photobucket.com/albums/q...hema111108.jpg

View:
http://i132.photobucket.com/albums/q...r/Dscf1436.jpg


-Bill WX4A/KP4

Bill Janssen wrote:
Looks good, no, very good. Better than my home made transmitters.

On the schematic, you missed a strap on the doubler coil. The ground pin
should be connected to the nearby "coil" pin. I didn't go over the
schematic in detail but I was interested in how you connected the
doubler coil.

Bill K7NOM

Good eye. I'll make the correction on the drawing. Thanks.

Bill WX4A

exray wrote:

Bill Janssen wrote:

Looks good, no, very good. Better than my home made transmitters.

On the schematic, you missed a strap on the doubler coil. The ground
pin should be connected to the nearby "coil" pin. I didn't go over the
schematic in detail but I was interested in how you connected the
doubler coil.

Bill K7NOM


Good eye. I'll make the correction on the drawing. Thanks.

Bill WX4A

Just a matter of taste of course, but I find that using dots on wire
connects, even with the use of arced cross-overs, improves readability

Michael

msg wrote:


Just a matter of taste of course, but I find that using dots on wire
connects, even with the use of arced cross-overs, improves readability

Michael


Ok, dots-r-us. Revised.

Bill