• 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

And you'll find out the even though it's called a balance resistor that single 2 or 5 watt 100 ohm resistor is merely an indicator of other problems because if it were large enough to carry half of the amps total output it would need to be capable of handling atleast 250 watts on a 4/1446 amp.

 

By the very nature that the balance resistor is toast in your amp would indicate just that, an imbalance in the load the combiner is seeing and by that I mean that one or more of your output transistors has failed due to what it's suppose to do and that is to create power and if one side of it has failed then you're only producing half power and the 2 or 5 watt 100 ohm resistor can't handle it and went up in smoke.

 

So you'll need to be searching for the reason for the imbalance to cure the output combiner resistor problem.

 

Look for the 10 ohm resistors from the transistor base to be toast and that will usually indicate which 2 transistor section has the bad transistors.

 

Always remember, there's a reason that the coax is connected while  you're transmitting.