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Search results

  1. vswr

    Realistic TRC 457 heats up, drifts, un adjustable

    Its been recapped.I tested every cap that I put in because I've had bad caps sold as new to me in the past and that created some serious power supply issues. I only discovered this bad disc once I started working on it, and the first step was to check to ensure 13.8V. I found 17 volts which put...
  2. vswr

    Realistic TRC 457 heats up, drifts, un adjustable

    Yes. No conductivity and I do get an adjustable voltage now since I replaced the resistive shorted disc cap.
  3. vswr

    Realistic TRC 457 heats up, drifts, un adjustable

    Good point! I havent done it yet but yeah it would be conductive. I'll stick with the white stuff. Thanks!
  4. vswr

    Realistic TRC 457 heats up, drifts, un adjustable

    Done! No kidding! Who needs a power mic when you have mod like this. I had to tone it right down its a screamer! Thanks for that tip! Sadly, I am still having constant issues with ct2, ct3, and AM. Turn one and it offsets the other. Then adjusting AM through it all out of alignment again. If I...
  5. vswr

    Realistic TRC 457 heats up, drifts, un adjustable

    Gotcha! Will get at that asap! Thanks and 73s! Great help from all you guys!
  6. vswr

    Realistic TRC 457 heats up, drifts, un adjustable

    I also have another annoying issue with my audio. People say it sounds pinched. Even if its cranked lower than specs. I dont use AM do I like clean audio. Is there a mod or trick I can do to clean up the audio and get rid of the pinch sound? Its like the amc kicks in slightly after I modulate...
  7. vswr

    Realistic TRC 457 heats up, drifts, un adjustable

    No transistors mounted to the shield wall.
  8. vswr

    Realistic TRC 457 heats up, drifts, un adjustable

    Also, i never run full 12 watts out. I tune it at about 9.5 to 10 ssb and 3.5 am.
  9. vswr

    Realistic TRC 457 heats up, drifts, un adjustable

    I picked up a buck power converter. I think it willwork great and its small enough to fit exactly imside the transistors heat sink space. I can use all the components and it will replace only the transistor. Problem is max draw is 3amps. Schematic says the radio uses 2.6amps full ssb mod. I'll...
  10. vswr

    Realistic TRC 457 heats up, drifts, un adjustable

    Tr401, cct trace is 27. Seems to normalize at about 90° when in rx. Ssb goes up to 120. Im gonna replace the paste with a top of the line CPU paste.also add a 2 inch muffin fan that will expel the heat fom the rear. See what that will do.
  11. vswr

    Realistic TRC 457 heats up, drifts, un adjustable

    No not off hand. I can get that number off the sams today. Its the big to3 c1618 left back corner. Ive heard talk of people saying its just better to swap it for a brick switching power supply. I do have one here. 30 amp. I just need to take an AC tap off of it for the clock. Im using a 100 amp...
  12. vswr

    Realistic TRC 457 heats up, drifts, un adjustable

    The transistor gets really hot. The heat sink too is really hot. Im gonna redo the heat sink compound and see how it goes. I will remove the load from the power supply section by lifting the orange wire. Then do a current draw test to see the flow. I think the transistor itself could be the...
  13. vswr

    Realistic TRC 457 heats up, drifts, un adjustable

    Its the T03. I never noticed a to220 mounted within the PLL. I'll recheck tomorrow. I'll keep the post informed. Thanks for the tip. 73s
  14. vswr

    Realistic TRC 457 heats up, drifts, un adjustable

    Ive been working on a 457 here and there. Recapped it including the tantalums. Started to do the alignment and found there to be 16 volts out rather than 13.8. Pulled the regulator and it tested fine. Ended up being a disc capacitor that had a 2k ohm short across the 2sc1618 base to collector...
  15. vswr

    What is so special about a GE superbase anyway?

    Thats great promissing news. Once im done with thid 457 I'll junp on it. 73s
  16. vswr

    What is so special about a GE superbase anyway?

    Update: I received 2x VCO from England today, I'll let you know if I can get to first base on this puppy asap
  17. vswr

    Sams PhotoFacts Collection

    Id like to unlock a few clarifiers. Namely the cobra 2000gtl and realistic trc457. Im looking for TRIED AND TRUE schematics along with tutorials. I prefer receiving information from members who have improved versions that keep the center on the clarifier rather than to get those "quick mods"...
  18. vswr

    Sams PhotoFacts Collection

    Awesome! Thanks again Dan!
  19. vswr

    Sams PhotoFacts Collection

    Yessir! Thanks!
  20. vswr

    Sams PhotoFacts Collection

    Hey Dan, would you happen to have the sams for a Midland 78-976 40 ch ssb base?