You've got a real enigma there! You're just going to have to trace the RF input circuit with a meter to find the short. It wouldn't surprise me if the relay issue is a result of the input circuit problem. I will guess that there is an input sub circuit whose job is to make the input impedance close to 50 ohms. You are spot on about the accuracy of wattmeters. They are only accurate with a resistive load. Since an antenna is a combination of inductive and capacitive reactances some meters read low and others read high. But just for reference, 4 watts into a 50 ohm resistive load equals 14.14 volts. If you are designing a keying circuit for an amp you have to keep that in mind.
The keying circuit is not getting a strong enough signal to latch the relay correctly. I notice that if the power into my amp is too low, the relay chatters. Thanks for the lesson.
You've got a real enigma there! You're just going to have to trace the RF input circuit with a meter to find the short. It wouldn't surprise me if the relay issue is a result of the input circuit problem. I will guess that there is an input sub circuit whose job is to make the input impedance close to 50 ohms.
You are spot on about the accuracy of wattmeters. They are only accurate with a resistive load. Since an antenna is a combination of inductive and capacitive reactances some meters read low and others read high. But just for reference, 4 watts into a 50 ohm resistive load equals 14.14 volts. If you are designing a keying circuit for an amp you have to keep that in mind.
You had me at enigma.
@@tramdr Calling it a "mystery" would have been too predictable.
Hey tram doc what model is that workman meter thanks buddy hope you are doing well sir
The keying circuit is not getting a strong enough signal to latch the relay correctly. I notice that if the power into my amp is too low, the relay chatters.
Thanks for the lesson.
Thanks for the info
Semes like a Reverse -Preamp to me. LOL
LOL