[Elecraft] K1 Front Panel resistance checks

egernet at hushmail.com egernet at hushmail.com
Thu Apr 1 14:52:38 EDT 2010


Before mounting the LCD on the K1 FP board, I am checking the 
resistances of adjacent pins on the U1 socket.

Most of them come out unmeasurably high >1M, but 30 and 31 (and 11 
& 12) on the U1 socket come out as 480 ohm which is too low. If I 
reverse the leads on my DMM, I get 1.65k. Confusing.

I had a look at the schematic and the pins connect to Vss and Vdd, 
where the 6 volt regulator U4 is connected.

My question is: Is this correct?

It sounds like I am just measuring the 78L06 and getting funny but 
benign readings.


73, Chris



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