Hello all, I have an old piece of test equipment, in a nice wooden box with a removable hinged lid. It is a Beckman RC16B2 conductivity bridge from a local SK estate. Maybe someone wants to build a

Herb, Happy you found the problem. Assume that it was solder at R3 or at the regen and not a broken land on the board. Almost every problem have had with a kit has been a missing or poor soldered

Herb, Wonderful! glad you have found the problem, you will have a lot of fun with the radio, I sure enjoy mine. 73, Curt KB5JO

Reminder: Wednesday Evening 40 and 80 meter Nets When: Wednesday, 3 June 2020, 20:00 to 21:00, (GMT-05:00) America/Chicago Where:40 and 80 Meters View Event Organizer:

Hello Jim Thanks for your excellent troubleshooting support on this problem. Very kind of you to jump in. Very 73 Stay Safe Johnny ACØBQ -- Check out the 4SQRP website at 4sqrp.com

Congrats, Herb! Good catch. As a fan of the British mysteries, I love a good detective story where the perpetrator is discovered by good old fashioned sleuthing. Let the evidence point the way. BTW

Hi Jerry, I just found out that the connection between the regen pot and R3 was open. I ran a wire between them and the set came alive. Thanks so much for your help. I really appreciate it! Herb

Hi John, I just found out that the connection between the regen pot and R3 was open. I ran a wire between them and the set came alive. Thanks so much for your help. Herb

Hi Curt, My problem is solved. While checking voltages on R3 and the regen pot, I found 0 volts on R3. The connection between R3 and the pot was open! I ran a wire from the pot to R3 and the set came

Hi Jim, Thank you for pointing me to the problem. When I got to #4 voltage check on your list, I found 0 volts on R3. I found the connection from R3 to the pot was open! As soon as I connected a wire

Just for info, my radio (which works) has following readings Curt KB5JO

What about removing R47 and the first hundred kits?

Hi Herb, I'm presuming you've fixed the earlier problem of low voltage on the Q3 collector? Before replacing any more parts, do a little voltage detective work for us. This will give some clues as

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Just thinking out loud here, but what if both D2 and D3 were installed backwards? I don't have an Ozark Patrol. I'm just relying on Curt's observations. 72, John, AA0VE

Herb No voltage on Q1 base implies short to ground in that circuit. Absent an internal B-E short, the voltage should be at least 1/2V across D2 and D3. Since you have replaced that transistor, the

Only the original N75 need the mod. All N75a include the mod. Serial number numbers 1-100 are N75. Serial number 101 and above are N75a. You are good to go. de wb0yfl

Hi Herb, The fact that it squeals seems to indicate the audio section is at least working. Not quite sure why voltages around Q1 are not right, so for some reason the problem seems to gravitate there.

Curt, I get nothing from the speaker except slight noise as you turn the volume control up and down. If I touch my fingers from Q1 collector to Q3 collector, I get a loud squeal from the speaker. I

$90 plus ship 72 - Ron - AG1P