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Recent content by sp5it

  1. sp5it

    Water in coax

    All my Yagis are direct fed with choke balun. No issues with direction skew observed. Mike
  2. sp5it

    Tower switching service as antenna

    Common practice is using Yagi as top hat capacity and tower as antenna for kow bands. Maybe it was that? Mike
  3. sp5it

    preamp

    Plenty on google. Did you try look for them?
  4. sp5it

    100 amp power supply

    Grab Astron RS70A schematic, use stronger transformer, add a few more 2n3771 and you have nice 100A PS. Or... buy 100A+ server PS for 100$+ https://www.ebay.com/itm/325915930275 Mike
  5. sp5it

    Imax 2000 Ground Plane Kit Worth it?

    https://www.w8ji.com/end-fed_vertical.htm#IMAX Should help. Mike
  6. sp5it

    Water in coax

    Replace coax. Seal it properly this time. Mike
  7. sp5it

    Need advice powering new M-70 Mic for my Yaesu ft-1000d

    Pretty easy to DIY. Just get plugs, cable and 5V PS. Than I can guide you. Mike
  8. sp5it

    New Antenna very high SWR

    That antennas need counterpoise, not grounding.
  9. sp5it

    President Grant PC-999AC (MB8719) No Receive/ No PA issue.

    Sorry, I looked to PC-999 schematic. Anyway, output pin 6 of audio chip should have steady 1/2 power supply voltage. Mike
  10. sp5it

    President Grant PC-999AC (MB8719) No Receive/ No PA issue.

    What's a voltage on IC6 pin 5? Mike
  11. sp5it

    Question about SSB Biasing.

    AM also need biasing. Otherwise amp is not linear and produces distorted signal. Only FM it doesn't. Mike
  12. sp5it

    If Hollywood reimagined CONVOY today?

    Hollywood you say... Rubber duck would be cripple afro-american transgender woman to meet current Hollywood standards. Mike
  13. sp5it

    [Solved] Raspy receive for some stations on a President Jackson CB.

    Completely different board. Can't help with that. Mike
  14. sp5it

    [Solved] Raspy receive for some stations on a President Jackson CB.

    It is famous bad AGC on Jackson. 1. Change R-43 10k to 1k 2. Change R-41 150k to 270k 3. Change R-47 1.50k to 3.9k 4. Remove capacitor C-31.
  15. sp5it

    Delta Electronics DSP60M for $189 yes or no

    I never converted it to more that 14.5V but you could try: https://www.eevblog.com/forum/projects/hp-hstns-pd30-voltage-mod/
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