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.
Hello all, I'm working on an amp with MRF455 transistors. Would someone happen to know what the bias voltage should be for these? I'm reading -12v on the base keyed or unkeyed. This doesn't seem correct, but I'm not sure.
If I had enough information, amp brand, model number, or a schematic I could be more helpful. Unkeyed the voltage should be ZERO volts. I am hoping that your voltage reading of -12v you just have your leads reversed. If you have -12v and you do not have the test leads reversed then maybe you have reversed your power supply.
The posting read as follows: I'm reading -12v on the base keyed or unkeyed.
Last I heard V means voltage.
You are correct about the quiescent currents at 80 to100 ma idle current.
Thanks guys. Sorry, after posting this I figured it out. Yes for class AB approximately .6 volts but adjust for correct current as mentioned. I was trying to figure out how to delete this thread
Thanks again!
This forum does not allow a single user to have more than one username. If anyone wants to change their username contact an admin and it will be done. Multiple accounts belonging to the same member will be deleted without warning.