by dipole » Mon Apr 20, 2020 4:58 pm
hello rob thanks for replying its a tx amplifier ive managed to build 2 what im trying to do is join them togeather but like i said in my first post it cancels out when i connect the 4 transistors togeather im useing a 1 nano fad capacitor for the dc blocker..it be great if i could go forward in this project if u could it be great it takes alot of my time at the moment but not enough time in the day.. the first amplifier is a 2 stage transistor its a 10 dbm input and its a 15 dbm output.. the second is a 10 dbm input n we get a 20 dbm output when i join them togeather they cancel out on the multimetre when i check the biasing on the second stage of the amplifier we get a negative sign on the metre if u have any advice it would be great thanks..
hello rob thanks for replying its a tx amplifier ive managed to build 2 what im trying to do is join them togeather but like i said in my first post it cancels out when i connect the 4 transistors togeather im useing a 1 nano fad capacitor for the dc blocker..it be great if i could go forward in this project if u could it be great it takes alot of my time at the moment but not enough time in the day.. the first amplifier is a 2 stage transistor its a 10 dbm input and its a 15 dbm output.. the second is a 10 dbm input n we get a 20 dbm output when i join them togeather they cancel out on the multimetre when i check the biasing on the second stage of the amplifier we get a negative sign on the metre if u have any advice it would be great thanks..