Search results

Thanks, Dr-DX. Good information. Will follow it thru and report back.

Swr button is off

I have a first gen. (Orange display) 2950 that the receive bars are not working. They work on transmit. Any ideas? I have replaced all electrolytics in the circuit. IC1 was replaced and all transistors and diodes in the circuit check ok.

I will try that but first I need to fix the issue with VCO1. The radio uses 3 mixers (TA7310P). I'm going to check them out today. I need to get that 2v back on J13 before the radio will even transmit. Thank you for your input and I will post an update after further testing.

Well, I had both VCO voltages...the radio was transmitting and receiving. The only issue I was having was the radio was transmitting on 23MHz and not on 27MHz. After more testing I found the proper mixing frequencies going to the tx mixer were not right. Now I have lost my 2v on J13. I do have...

I have a 1st Gen. 2950 that transmits and receives...but not on frequency. In tx mode it transmits 23.154MHz no matter what channel your on. Im thinking the CPU is ok because the display reads correctly. My gut feeling says it may be something with the binary code from the encoder...but just...

The orange wire did go to the switch where the black wire is soldered. I found the same 4 plug harness on a S6 Magnum for the solution.

Solved. Thanks.

This radio was intermittent from turning on. When I took the cover off, I noticed a orange broken wire hanging there. It comes off J101 on the bottom right side from the main board just below the meter with the front of the radio facing you. That jack has RED, ORANGE, YELLOW, WHITE wires coming...

I understand. I will find someone I know that has one and see if I can borrow it for 10 mins to get the voltages I need. Should be good to go then.

I'm sure that cap that was soldered in reverse had something to do with it :)

IC7 was the problem.

Bump ^^

I was wondering if there was a voltage chart for this radio? Have one that dead keys 40w, no variable power control and no AM modulation. I went to the series pass transistor (TIP36C) removed it from the circuit and it tests fine. Suspecting Q53 or Q56 smt. I have the service manual but it does...

Z-28 ohmite chokes are readily available. It would be easier to just replace it. If it was a part that was unobtainable, then I would fabricate my own. Thank you all for your input. The actual value is now known for me to carry on. 73's

21uH is what it is. Z-28

Because I don't have the materials. Looking for the mH value to purchase a new one. Thanks.

I'm looking for the value of the RF choke on the upper deck. I took a pic of the part from another amp but need to replace the one in a different Scout 20 that burnt up. I searched everywhere and could not find a schematic.

Guys..I guess you didn't read my last paragraph where I said I replaced C112 and C157 with new ones. Those 2 caps have been reversed to what is silk screened on the main board. I rechecked every electrolytic on the main board with the overlay component side picture. C112 and C157 were the only...

They were