Hello dear radioamateurs,
i got a problem with my txu1256 transmit unit.
There is a ripple noise with 50/100Hz on my tx-audio.
At the output of LIT1256 is all ok but at the output of varactor modulator FGN1256 ( 68MHz) there is 50Hz noise.
Does anyone have an idea ?
VY73 de Chris
TXU1256 50/100Hz Noise
Re: TXU1256 50/100Hz Noise
very simple.
replace all elco's in the power supply module, they are old and dried out.
You can even use higher values in the same size, prefarbly the black high temperature ones from Farnell
Pedro ON7WP
replace all elco's in the power supply module, they are old and dried out.
You can even use higher values in the same size, prefarbly the black high temperature ones from Farnell
Pedro ON7WP