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Correct and diode manufacturers advise NOT to use them.? And thanks for the compliments! Paul K0UYA

I don't have the specified punch. I use something like a drill bit to knock it out about 1/8 inch. Then I use a small wire clipper to pry it out enough that I can get a small needle nose pliers under

Yes a punch works. Rob, NC0B

*I really got to proof-read before sending messages that cannot be edited!!*

Paul, I have several of your boards including the excellent "kit" for the 516-F2 and also in all fairness, *I stand corrected* ! The L-4B "Harbach" board is indeed a "Harbach Board"!!? I have one in

Just got a AC-4 and the bias line (green wire) is not continuous from PSU to Cinch pin 9.? I never dealt with Cinch plugs before but got the datasheet and see replacement part for the 300 series

In all fairness that is not one of mine.? True, I have many products on the Harbach site but that is not one of them.? Mine all bear the the prefix ES4, well almost all of them. I have used many of

schrack rt114012 series Mike Bryce prosolar@... "The eye is always caught by the light, but shadows have more to say"

What brand of relays are on the board? Doug Free Climbing - The ultimate test of strength and endurance From: [email protected] [mailto:[email protected]] On Behalf Of mike bryce Sent:

Gang, the L4/l7 power supply boards have been spoken for mike, wb8vge

Actually, one of the main difference is the thickness of the pcb My boards are .100 thick and have 2 oz copper, that makes them much more expensive to manufacture. Had I went with the standard .052

Main difference between the two boards is that the HeathkitShop style has pads for the diode equalizing resistors while the Harbach design enables one to piggy the resistors onto each diode. ?I've

Just as an aside, If anyone else wants PS boards for the L-4/L7,? Harbach also has blank Electronic Specialties boards for $25 + shipping.

Thanks Mike. Bob Coffman KJ7AJ 2drestoration@...

Okay, you got the last one. Will send doc via email PayPal works prosolar@... is my id Mike Wb8vge Knowledge is knowing a tomato is a fruit; Wisdom is not putting it in a fruit salad.

Mike, I would like one of the power supply boards. How do I make the necessary arrangements? Bob Coffman KJ7AJ 2drestoration@...

Hi, everyone. I was surprised I found these. This is the power supply upgrade for the Drake L4/L7 high voltage power supply. These pcbs are extra thick with two oz copper plating. They are expensive

Hi, gang, Doing my yearly shack cleaning and I found three of my remote 5 port antenna switch pcbs. Very little documentation, but easy to build. $20 a pop with first class postage mike, wb8vge the

Steve brings up a good point re common mode. I recently spent several hours tracking down the source of 60 Hz hum on the audio output of my R4-C. The hum was objectionable and the 60 Hz sidebands were

*** I suppose one could build a power supply to feed the filaments DC. OR - one could modify the circuit to give the filaments their very own return, and NOT PASS AC CURRENT THROUGH THE CHASSIS. -