This morning I built a mic/PTT for the BITX 40. I used the little electret element that Farhan sent with the rig. The element sits atop the plastic tube from a pen. For the push-to-talk I used a little push switch that locks down (on) until you push it again (which opens it). This is very convenient -- you don't wear your thumb muscles out on long "old buzzard" transmissions! I used some PVC pipe and some wooden dowel to make the thing a bit ergonomic. It is held together with Gorilla tape. It works great! I put the rig on the air this morning and very quickly worked KD3TB up in Pennsylvania -- Irwin was testing his K3. Then I worked KM4LWP -- James was only a mile or so from me, running 3 watts from a KX3. Then Mario, K2ZGW called in.Everyone said the rig sounds great.
In the picture above you see the rig, the mic and (on the right) the VFO.
In response to popular demand, "SolderSmoke -- Global Adventures in Wireless Electronics" is now available as an e-book for Amazon's Kindle.
Here's the site:
For the print version:
For shipping from a printer in the U.S. (probably better for N. American buyers) Click here: SolderSmoke USA Version
For shipping from a printer in the UK, Spain, or the USA (probably better for UK and other European buyers)
Click here: SolderSmoke EU Version
The two versions are identical, except for a minor difference in the paper used. That's why the prices are a bit different.
Bill's OTHER Book (Warning: Not About Radio)
Click on the image to learn more
W4HBK's QRSS Grabber: The Amazing Pensacola Snapper (Live!)