The Defpom Forum, for RadioMods, S&M Software and Music by The Defpom

Thanks Kosmic. I really appreciate your help. Sorry for the delayed reply. Sometimes I forget to be appreciative.

Wanting to do the 2sc2999, and schotky diode "super ears" mod. Is it tr-17, and d1,d2 ??? board number is EPT3600-14b. Thanks for your help.

Radio Make and Model: Uniden Washington PCB Number: PC 385AG PLL Number: Test gear available: Symptoms: random scratchy audio in my receive. What is working: Everything works What has been tried: Did it suddenly happen ?: Yes... Anything else that may be of help?: Ok. Radio came to me with no audio....

Turns out it was just the Hall effect. Transfered my negative lead from board ground to chassis ground, and my readings were constant. Thanks for your interest.

I have a hard copy of the Alignment procedures for this radio, but no way to scan it. at least not yet. Please let me know if you are still in need of this info. Thanks...

I recently aquired a series of these books starting with 81 and ending with 259. I'm missing book #235, and book #249. Can someone tell me what radios are covered in each? Thank you...

Hello Rick... I hope you keep doing what you're doing, cause I know I'll need your help in the future. With that being said, I will gladly thank you now for a fix tomorrow. I have to agree with the replies that I've seen from the other users. Your knowledge, and understanding of rf circuitry is quit...

I have in front of me a HyGain XL-1 rotor control box. I think that maybe the starter capacitor is bad, but I'm not sure how to check it with my ohm meter to see if it is indeed bad. Help please.

ok, It wasn't as bad of a problem as i had originally thought. Adjusted the ALC pot, and sprayed some cleaner on it. It's fixed now.

I have a Cobra 142 GTL that will squeal when you turn the key watts down below 2 watts. This only happens on TX. Any ideas would be helpful. Thanks.

Radio Make and Model: Superstar 3900 gold PCB Number: ept360014b PLL Number: mc145106p Test gear available: dmm, pdc600 watt meter, freq counter Symptoms: I'm upgrading the stock 2sb754 to an NTE37 (or 2sb817 equivalent). Anyways, when I checked the collector output of this transistor the voltage st...

Ok... I changed the 7.8025 crystal to a 7.7975 and now it's transmitting on the correct frquency. But, it still wants to drift, but only about 2kc's above normal, and that only occurs after talking for about a half an hour. Any ideas????

Not sure what's going on with this radio, but It receives great, but when I go to transmit it transmits one channel away. or 10kc away. Any help would be appreciated. Also I think a proper AM transmit alignment is in order, but I do not have the info that I need.

No Schematic in my trunk. Sorry.

Same thing I originally thought. but it does not make any sound when connected to the transmit. I was thinking somewhere along the switching transistors, just not sure where that is in this old radio.

I built this project that was submitted by Stan the Man. It works just fine, but I need help figuring out where to hook the green wire. Says on the instructions the green goes to ground when the radio is keyed. Where in the radio should I hook this, or do I need to manually ground it after I have ke...

I may have a schematic for your radio, unfortunately I am preparing for work now. I'll check the trunk this evening, and hopefully be able to help you out.

Radio Make and Model:
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Thanks for your help. Just finished the mod. Turns out it is TR17, D1, D2, D10, D11... And it's one of the best mods that you can do for your radio, IMOP

Radio Make and Model: Superstar 3600 PCB Number: SRT3600-10 PLL Number: MC145106 Test gear available: Symptoms: What is working: What has been tried: Did it suddenly happen ?: Anything else that may be of help?: I want to do the receive modification using the 2sc2999, and the 1n6263 Shottky Barrier ...