Down the Rabbit Hole
Lately, I’ve been restoring a Dynaco ST 150 stereo amplifier. As my collection of classic vinyl recordings grows, I’ve assembled the ultimate 1970’s playback system. Coming of age in the mid-70’s, I coveted the then-new high-power solid state amplifiers.
I was having a lot of fun with the restored Ten Tec Omni (series C), but like all of the older Ten Tec radios, the Permeability Tuned Oscillator (PTO), aka VFO, left a little to be desired. Back in the day, when I bought my first Ten Tec, these PTOs were considered very good — but time marches on and we’ve gotten used to smoother and more stable VFOs. An upgrade would be nice.
I finished circuit repairs on a Ten Tec Triton IV transceiver and now it was time to address the grubby cosmetics of the radio. The radio had obviously been used as a mobile. Markings had been added to the front panel in Sharpie, and there was a yellowish film on the panel.
As I mentioned in an earlier post, I owned a Ten Tec Triton IV (model 544) in the late 70’s and always loved it. I traded the radio a few years later for an ICOM 720a (also a great radio), but always regretted losing the Triton. Fast forward about 40 years, and the gift of an old Triton II reminded of that first love. The Triton II is similar, but the IV had several refinements that made it really great at the time, and I decided to get one again.
In the last post, I described a used Ten Tec Triton IV and addressed the most immediate issues. I also mentioned making a cosmetic restoration, but after using it in the shack for an evening, it was apparent there were other problems. The “Offset Tuning” (OT) LED didn’t work, and more seriously, the transceiver didn’t always mute in transmit. Strange sounds issued from the speaker at times.
eBay has provided a lot of entertainment (and used equipment!) over the last few months, and after the purchase and restoration of a Ten Tec Century 21, I started looking for a Triton IV. This was the first radio I purchased new in 1978. I really enjoyed it and wanted to own one again. It didn’t take long. I ended up having two in the shop at almost the same time — one for my shack, and one for a fellow ham.
Over the years, Ten Tec has released a surprising number of CW (continuous wave or Morse Code) Keyers for Amateur Radio use. There have been two basic designs, single paddle and double or imabic paddle models. Released in about 1975, the Model 670 is a single paddle version, intended for use with the Century 21 CW transceiver.
The Ten Tec Triton I/II transceivers were released in the mid-1970’s and marked a milestone in High Frequency (HF) radios. With coverage for the 80, 40, 20, 15 and 10-meter amateur radio bands, 50 to 100 watt output on SSB and CW, they may have been the first affordable, fully solid-state models.
I’ve been a Ham for over 45 years, but have never really gotten comfortable with Morse Code. Sure, I was able to pass the code requirement when I first got my Technician and later Advanced License, but my CW chops were always shaky at best. I had been more interested in building and modifying equipment anyway, so it didn’t seem like a major deficit.
I look at Ebay from time-to-time, and lately I’ve been having a little too much fun. A Ten Tec Century 21 CW Transceiver (model 570) attracted my attention recently. The “570” was a solid-state radio intended for Novice hams and covered five bands: 80, 40, 20 (and with accessory crystals) 15 and 10 meters.