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  1. sp5it

    CRT Hercule display board

    He is asking about that in 4-5 threads. Already responded on one of them
  2. sp5it

    CRT Hercule Turbo no Modulation

    Apply audio from signal generator on microphone socket, put it on TX and check if on pin1 marked blue you have a signal from generator. If not, follow red line back to mic socket to find where it disappear. Mike
  3. sp5it

    CRT Hercule Turbo no Modulation

    Ok, lets start. Link schematic for your radio. Mike
  4. sp5it

    CRT Hercule Turbo no Modulation

    And that's a reason to post in old threads? We unite in pain. What measurements and tests you done so far? Mike
  5. sp5it

    10m Dipole at various heights plots

    My bad. I did it over perfect ground. I will redo them later over real ground. 20m height over real ground is like that. Dipole is on Y axis
  6. sp5it

    10m Dipole at various heights plots

    Done.
  7. sp5it

    10m Dipole at various heights plots

    Any particular heights?
  8. sp5it

    Unit 399 JJ in Medellin Colombia

    That's really sad news. RIP Unit399
  9. sp5it

    How to broadband a 5/8 wave

    More narrowband antenna is - better. Want wideband vertical? Look for "conical monopole hf antenna" Mike
  10. sp5it

    HR-2510 frequency issue

    Yes, that one.
  11. sp5it

    HR-2510 frequency issue

    Problem solved. Added transistor on the back messed. Thank all for the help. Mike
  12. sp5it

    HR-2510 frequency issue

    Over the years I had on my bench more than 200 of HR2510, HR2600, HR2830, Lincoln's and similar for repairs or tune. None of them were locked just to CB. Mike
  13. sp5it

    HR-2510 frequency issue

    @cdoc radio mentioned work up to 27.999 only. Mike
  14. sp5it

    HR-2510 frequency issue

    @Cable Guy what is inside black shrink tube? Mike
  15. sp5it

    HR-2510 frequency issue

    Anyone have a board to compare with mine? Mike
  16. sp5it

    HR-2510 frequency issue

    Reading on display is correct to TX/RX frequency. Radio just won't go above 27.999 Mike
  17. sp5it

    HR-2510 frequency issue

    Hello. Have you ever seen 2510 working only between 26.000 and 27,999MHz? How to open it to 10m? Seem to be untouched. @Rogerbird1 ? Mike
  18. sp5it

    Stryker 955 Issue

    What is the voltage between pin 4 and 5 of IC1 (TDA2003)? Mike
  19. sp5it

    Maco V-58 Height vs Performance

    Hi. Simulation of 10m Yagi, but 11 gonna act the same. Mike
  20. sp5it

    My latest project.

    Good work. Get some carbon monoxide sensor to be on a safe side. Mike
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