• You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
  • A Winner has been selected for the 2025 Radioddity Cyber Monday giveaway! Click Here to see who won!

Search results

  1. sp5it

    DC Grounded Base Load Antenna vs 1/4 Ground Plane mobile antenna

    (Almost) every radio have resistor on antenna input that makes any antenna be DC grounded. You can add resistor to GP antenna if you wish. 100kOhm 2W will work easily up to 1kW. Mike
  2. sp5it

    dx-959

    Audio amp. Not that difficult to find on the schematic.
  3. sp5it

    Power supply problem/info needed

    What capacitors did you use on input and output of LM?
  4. sp5it

    Power supply problem/info needed

    Do you have caps installed at the 7805 as datasheet show?
  5. sp5it

    Power supply problem/info needed

    Ground loop maybe. Can be bad circuit, or no ground for LM7805
  6. sp5it

    What effective DSP units with or without speakers are available out there

    https://bhi-ltd.com/
  7. sp5it

    Yaesu FTDX10 versus FT-710

    After all radio is just an addition to antenna field.
  8. sp5it

    Realistic HTX-100 button beep removal?

    Remove R413 from CPU board or disconnect cable marked red. Mike
  9. sp5it

    6666 40w max.

    Measure on dummy load. Use a oscilloscope, keep input voltage @13.8V under load. Mike
  10. sp5it

    dx2517 voltage regulator

    2sa1869 is up to 3A , 7808 is just 1A. Is it enough in that case? Mike
  11. sp5it

    dx2517 voltage regulator

    Check Q35, D72 and Zener D73.
  12. sp5it

    SR-955HPC capacitor C54 identification? SMD

    It's 10nF, not 100nF 103 mean 10 000 pF
  13. sp5it

    Midland international Model 77-830 VS Uniden PRO 510XL

    77-830 Mike
  14. sp5it

    worldwidedx.com server is being hosted in Russia!?

    Not true.
  15. sp5it

    VK0DS Macquarie Island

    Sorry to ruin your day, but it is AN-016 dxcc #013 Antarctica.
  16. sp5it

    AT-5555N2 audio boost

    Echo as modulation boost? LMAO. Simple DSB clipper will give you much better result. Mike
  17. sp5it

    President Ronald Help

    Did you follow that instruction? https://www.worldwidedx.com/threads/president-ronald-modifications-to-11-meter.265827/
  18. sp5it

    President George FCC NPC

    Check if that schematic fits: https://www.bensons-funktechnik.de/downloads/%20Schaltbilder%20Service%20Manuals/President/Grant%20II/
  19. sp5it

    President George FCC NPC

    Post schematic, I can help with NPC. Mike
  20. sp5it

    New President Washington Mobile Radio?

    How to work station which is below 1s unit? Mike
Top Bottom