[qrp-l.org] willamette 20M construction begun today

[Jason Milldrum]

Hi Steve,

Sorry I didn't get back to you sooner about the board sizes. That's a
common question that gets asked, but I don't think I've ever published
the actual board sizes in the documentation (I keep forgetting!). I've
just made a placeholder in my updated documentation so that I can
remember to put the proper measurements in there.

Glad to see that you just dove in head first with the building! You
certainly don't need to use the layout diagram if you are an
experienced builder. I wanted to provide it for those who needed the
help, but I don't think that I necessarily did the best layout that
could be done. That's really cool that you already got the audio chain
up and running, that's actually the bulk of the receiver. Once you get
the pain of building the product detector done, the rest of the RX is
easy. Your two sig gens should work great. Just inject approximately
+7 dBm into the prod det at the frequency of your choice.

Hope you keep us updated with your progress, as I really love to hear
everyone's experiences building the rig. Also, if you have a digital
camera, it would be really great to see some pictures posted to the
Flickr group (in my signature below). And if you have trouble sourcing
parts, let me know.

73 es Happy Building!
Jason Milldrum, NT7S
=====
Amateur Radio Station NT7S - <http://www.nt7s.com>
NT7S Blog - <http://www.nt7s.com/blog>
qrp-l.org Flickr Group - <http://flickr.com/groups/qrp-l/>

On Tue, Aug 19, 2008 at 8:30 PM, Steve Ratzlaff <steveratz at wildblue.net> wrote:
> I eventually realized I didn't need to copy the identical layout used for
> Jason's original WM20 rig. I dug a much longer piece of PCB out, found all
> the parts for the Receiver section in my junkbox. Using just the schematic I
> started building. The receiver is finished; I tested the audio section
> (injected audio into C52, input end lifted from the Diplexer)--it works
> fine. Tomorrow I'll check the rest of the receiver. I have two sig gens, one
> can be the product detector LO, the other the RF input. Hopefully that will
> work OK too.
> I built it "ugly style"--the usual way I build stuff. I'm lacking the TX
> output transistor (on order from Diz's outfit along with the MV209), the
> ceramic resonator and the 18Mc crystal, so will have to order those before I
> can build the other sections of the rig. I probably have the rest of the
> stuff in the junkbox.
> I also joined the WM20 yahoo group yesterday but after reading all the
> messages it seems that I'll be better off scrounging all the parts on my
> own.
> I wonder how many rigs have been built so far?
> 73,
> Steve