Thursday, November 08, 2007

Pulsing Amplifier Tuner

I made a trip to my local Radio Shack and was able to find all the parts I needed for this project. I have to admit that the circuit board I ended up with doesn't look as nice as the schematic, but the circuit works very nicely. Richard Measures was kind enough to publish the above seen schematic and notes. I increased the resistor value of R1 to increase the speed or frequency of the dits for more stable meter readings.

The idea behind the pulser is to use a rapid series of cw dits that are fast enough to keep the meter levels stable. I plug this into the electric-key jack on my 746pro, and while in cw mode, tune for max output. This circuit will save your tubes, and power supply, because it only uses 1/3 the grid current to tune your amp up.


Sunday, October 21, 2007

Current Station

I've been away for a while, but now that the weather is getting cooler, I'll be adding entries as often as I can.

Since upgrading to General Class, I've made some upgrades to my equipment. I'm still loving my Icom 746 Pro, and have added a Heathkit SA-2060 tuner and an Ameritron AL-811 amplifier. I was fortunate enough to find the antenna tuner on Ebay at a real reasonable price. It's an oldie but a goodie and is built like a tank. Below is my main HF antenna, the all band doublet.

All Band Doublet

This is my latest antenna. It's commonly referred to as a Doublet.