Figure 1:The ball bearing assembly, extracted from the old keyer
The old TenTec Ultramatic Keyer is still used today by many amateurs, including myself. Its Ultramatic keyer mode was born in 1953, and later overtaken by the Iambic A and B modes. I still use the two of these keyers that I own, but one recently needed a repair … In the video shown in figure 2, you can watch a 35 second walk-thru of the disassembly and repair.
Figure 3: A closer look at the Corsair II (left of photo). Click to enlarge.
The first thing I did with the new-to-me Corsair II was to check the output voltage coming from the TenTec power supply that accompanied the radio. These old power supplies can suffer from shifted component values over the decades. It turned out that the TenTec power supply was putting out around 14.5 volts – a shade on the high side. I took the cover off, and ran the adjustment trimmer down to a more appropriate 13.8 volts. The previous owner had mentioned a little problem with the display not always working. I noticed this too – but the problem seemed to go away when the voltage was reduced.
It took a little while to get used to the Corsair II’s pass-band tuning and its other various selectivity features. Once I got the hang of them, I found that …
Figure 1: The Ten Tec 540 is playing love songs again
Four times I courted her. Three times I dropped her. This time it’s forever. Over the years, I’d managed to find myself paired with the one whose songs were so delightful, whose voice stuck in my memory for the whole day long.
Impressionable and easily infatuated, my young mind learned of the CW siren, that seductress of the airwaves. Long into the night, I listened to her soft messages, sometimes drifting off to sleep with my hand on the key, eventually slipping into one of those sweet dreams of hamdom.
Figure 1:The venerable? Heathkit GR-78 receiver, as it was found in flea market.
What ham can resist the allure of a piece of vintage gear, sans cover, knob, and a part or three, looking ever like the cartoon character with sprigs of pointy hair wires protruding from it, and connected to nothing? When we go to ham swap ‘n shops, we brace ourselves ahead of time, lest we not load our trunks with the contents of theirs. We have time in such cases to revisit the vision of our junk corners at home, and the XYL’s displeasure of same.
Figure 1:The cloud warmer for eighty meters. Click to enlarge.
So, on eighty meters my signals were always in the dust. In the fall season, with thunderstorms hundreds of miles away, I had an S6 static noise level, with crashes above that. It was enough to drive me back to the forty meter CW band. The problem was twofold. First, I had a very “loaded” 80 meter attic dipole, and secondly, it was a dipole. Hence it was poor to begin with (being both loaded and in the attic), and a great static noise scooper (like all dipoles are).