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Discussion in 'Amplifiers' started by tvrc18, May 28, 2011.
are you checking swr and power with the meter after the amp and only coax between the meter and the antenna ?
what power supply are you using ?
most power supplies are rated at their peak amperage , not continuous .
I would guess that if you are fully driving the amp input properly, it should do 275 and need about 35 amps. If you push the amp fairly hard; then 40 amps may become necessary. A rule of thumb, is to have a supply that has some 'head room' of 5-10 amps more than the amp will draw. Reason? So that you don't over-tax it and have a failure. It is also true that when the supply is taxed to the maximum, you will also have a voltage drop as well, which I'm sure you don't want/need either.
Just some thoughts . . .
the swr change isn't worth worrying about , the antenna tuning hasn't changed . but , you could try a different jumper that might make the meter happy by read lower . the pills still have double the clean power available than the 100 watts pep you're currently getting . try the amp on high and see what your pep power is ....... if you want a little more power . do you have your mic gain turned all the way down when checking the vswr ? if not there may be some small amount f sound coming through slightly modulating your signal and the slight increase in power from it is causing the swr fluctuation .
btw , the 2510 you have is not the higher powered 100 watt model is it ?