Heathkit MR-1010 digital dial 3

 I tried the DL4YHF2 frequency counter / crystal tester that I bought on Ebay as a digital dial for the Heathkit MR-1010.  Here is a very well done manual for it:  

https://z100lifeline.swvagts.com/articles/DL4YHF2Manual.pdf

  The counter doesn't have an input amplifier so I used a prototype for the Counter Preamp kit ( web page: http://wb9kzy.com/preamp.htm ) to convert the local oscillator to digital level signals.

counter preamp prototype just hanging there

counter preamp schematic (discontinued kit)

A signal generator was used to set the offset frequency to 453 kHz so the counter now functions as a digital dial.

MR-1010 tuned to WDBC Escanaba 680 kHz

While it works I think the next step will be to mount the preamp inside the MR-1010 and then route the preamp output to a jack.  Another jack for power will also be added.  This way the actual display can easily be changed as desired.  This DL4YHF2 counter is a little dim as currently constructed, I had to shade the LEDs to be able to see it clearly so that might be a change to make.

Best Regards,

Chuck, WB9KZY
http://wb9kzy.com/ham.htm