Boys and girls… I’ve been working on a replacement calibrator for the drake R4b. This calibrator will output 100, 50, and 25 kHz signals. You select the output with a dip jumper. The output also pulses on and off, and again, you can turn that off if you don’t want it.
it has the same footprint as the original, and all wiring plugs into it with a MTA.100 header and plug. This project is about done. I’m in the process of having a small run of pcbs made. here is a link to some photos and ‘scope traces of its output http://theheathkitshop.com/downloads/Drake%20R4b%20calibrator/ Mike, wb8vge Mike, WB8VGE SunLight Energy Systems The Heathkit Shop http://www.theheathkitshop.com/ J e e p o|||||||o A man with one clock knows what time it is. A man with two clocks is never sure.
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