• 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.
  • The Feb 2025 Radioddity Giveaway Results are In! Click Here to see who won!

Reply to thread

Thanks for the Flowers, but it still doesn't produce any TX stuff...


So let's look further and see if you have a section that's bad, or you just need a good tuneup...


Ok, now to help with TX - you get a Red light so you many need to "proble a bit, but look this over first so it can help you find the spot that could be bad...


For this...

...Install an External Power Meter and jumper cable to connect it and use a DUMMY LOAD on the METERS' ANTENNA jack to keep the Final blowing...


[ATTACH=full]35931[/ATTACH]


Don't have a Dummy Load? 

  • Make one!
  • PL-259
  • 3 - 150 ohm ( Brown - Green - Brown ) CARBON COMPOSITION (not Wirewound) resistors
  • Twist / Bundle Resistors in parallel 
  • solder one "Bundled" end to INSIDE stem of PL-259
  • Solder other "Bundled" end to OUTER Shield of PL-259


[ATTACH=full]35932[/ATTACH]

Does not need to be High Quality - just Soldered correctly.




Welcome to OHMs - Law...



 

    • 3 150 ohms resistors is PARALEL work like one resistor 
    • - since they are all the same value 
      • - that power load is shared amongst the 3 in equal amounts - 
    • To simplify this - 150 / 3 = 50 ohms - your perfect 6 - watt dummy load...


In the above SWR meter pic, there is a 15 watt Dummy load from old Radio Shack days - you just need something to keep 50 ohms impedance while you tune the radio by looking at an external SWR /Power meter



I'll continue in another post...