K2AS Ham Radio

I previously have mentioned the Eico VFO that I picked up at the AWA Swap meet in May. It has ended up being a great bargain, as it has been working well. There was a knob missing, and it was very unique, so I doubt I will ever have the originals on it again, but it has been very functional. Eico 722 VFO Initially, I wanted to see if I could get it to work with my novice homebrew transmitter that I built in 1971. It has a built-in power supply (some VFOs from that era did not), so I saw that there were replacement caps, but wired underneath the chassis, and in parallel with the original can cap. That could double the capacitance, probably not a major issue, but if the old can caps were leaky or shorted, could be. So I disconnected the can cap. I thought about getting another can cap, or making one, but decided to wait. I also converted it to a 3-wire power cord. My homebrew xmtr used an octal socket for the crystal, so I made up a cable using RG-174 with a male octal plug (luckil...

I received the new electrolytic capacitors from Hayseed Hamfest and replaced them successfully. The main power supply cap(s) were easy, but one was on a small PC board and since all interconnects are wired with no connectors, it can be a challenge. It might be a little low in the output power. In those days it was spec’ed by input power, and 90 watts was full power. Output power looks reasonable, between 50-60 watts. The final tube plate voltage is high, I might need to look at that some more. Overall, seems to work OK. My main issue is with the plate current meter. It swings wildly when sending CW. I can dip set the plate current fine, and adjust the power out. But if I set the plate current at about 150mA (about 1/2 scale), the meter will overshoot on each key press to about full scale (300mA), and just fly back and forth between 0 and 300mA. The meter is right in the cathode circuit, so shunt, just inline between cathode, a 15 ohm 2 watt resistor and ground. My homebrew...