Monday, April 7, 2014

Power Mites of Old!!!I'

I saw an ad for my first Ten-Tec Power Mite transceiver when I was stationed in the Azores in the early 1970s. The price was attractive but other things took priority. Thankfully, Jake Ritzen, CT2AZ, loaned me one of his Power Mites and I had my first experience with direct conversion receivers. I was suitably underwhelmed.

In 1973 I procured a Heathkit HW-7 QRP rig and built it according to the manual. It, too, had a direct conversion receiver. Again I was suitably underwhelmed! It seemed that any time the base MARS station came on the air (irrespective of the band) I was unable to use the HW-7....something I also experienced with the PM-2 from Jake.

Over the years I have had several of the PM series....the PM-3A being my favorite. It covered only 40 and 20 M but had break-in keying, which was nice. Not having to switch from TX to RX on the front panel, as with the previous models made the PM-3A a joy to use. Power output on the 3A was around 2.5 watts (5W input power).

Some how I ended up with a PM-2B while I was in Japan (KA2AA) in the late 1970s and that rig followed me to England (RAF Mildenhall), my next duty station. We were relegated to quartering off base, in our case, the town of Bury St. Edmunds, the place where the English Barons met at the Abby of Bury St. Edmunds and vowed to force King James (you, know.....Robin Hood and all that) to sign the Magna Carta (circa 1214).

Our house was positioned in a housing estate located on the end of a huge soccer field next to a school. Surrounding the field was a very large chain link fence. Lacking a suitable aerial at the time, I affixed a piece of wire from the fence into my bedroom and hooked it up to the PM-2B via a AC-5 antenna tuner. My first contact was Colin Turner, G3VTT, a member of the G-QRP Club. That started a 35 year love affair with the G-QRP-C. I met many fine QRPers during that time period and on the occasion of my 37th birthday, my wife, Patricia (KB3MCT) conspired with George Dobbs, G3RJV, head honcho of the G-QRP-C and his wife, Jo, to put on a surprise party for me at the Dobbs' home near Birmingham. With about 25-30 QRPers in attendance we had a grand time and I even was introduced to that old Scottish tradition, the Haggis! (Hint: If you get past the smell you got it made!!)

On a recent trip to Norm Schlar's, WA4ZXV, to pick up an antenna analyzer, I was presented with Norm's ailing PM-2, in hopes of getting it back into running condition. Unfortunately, I had off-loaded all the T-T literature I had amassed on the PM series of rigs dating back to the mid-70s, so troubleshooting this little QRP rig is proving to be somewhat problematic.

So, I am now on a quest to obtain a schematic of the PM-2 (I have one on the PM-3A but that is an entirely different radio) so I can get this old gal back on the air for Norm. Therefore, if anyone who reads this posting might happen to have a copy of that schematic and possibly the entire 9 page manual, I would be very grateful if you would contact me directly (

Looking over the PM-2 I am amazed that anyone was able to make a QSO with these simple rigs. The receiver is just this side of "horrible", and the power output is around 1W going flat out with a tail wind! All that being said, those were the things that made life using QRP "interesting".

Vy 73

Rich K7SZ

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