Ludwig,
?
Thank you very much for coming to my help. Yes, I mounted a 50 ohm dummy load and? did a factory reset
prior to performing the sweeps.
?
There are no apparent faults in the solder unions around R518. I measure about 29K across, but as I understand this
is? the Thevenin resistance of the circuit rather than the value of the resistor. I am reluctant to unmount the tiny thing to measure
it in isolation, but will do if necessary.
?
The sound from the QMX is very noisy, nothing like the cristal-clear sound I get in my QCX. When I tune 7074, 14074, 21074
in digi mode I can hear the characteristic FT8 (again, with noise).
?
I will read the document you mention? about the PCM1804, although I am afraid replacing is beyond my level of expertise.
?
Tnx again, Ludwig.? 73 de EA2BEE.
