I once had a bad xtal filter in my FT1kMP.
It was visible on the s-meter when switching between different BW's. The
filtering itself was still OK but there was some attenuation (at least
an S-point or so). Could not measure this with the trx itself (a big
hurray for the K3 that it can) but I used a signal generator and scope
to check it.
I replaced the filter and all was up to spec again. So it happens.
The dBV meter of the K3 is a nice measurement system. I have used it
several times to checkout some filtering and signal splitting networks
in combo with a signal generator.
73
Arie PA3A
Op 31-5-2013 3:24, Jim Miller schreef:
I've long suspected the 250hz8p filter in my sub was not working correctly.
Anyone else had a bad 8 pole?
I'd like some feedback on this test method to make sure I've got my ducks
in a row before getting another filter to replace this one.
Thanks
Jim ab3cv
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