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Clark,

Please forgive my lack of clarity.? I'll try to fashion up something better and make a go of individual relay measurements within a week or so; I'm about to have vertebrae C3-C7 fused and bracketed together, so, any messages after 18 Sept may be Oxycontin-laced? :O?? At least I'll have plenty of time.

My chief focus was to answer the concern of whether the relays were switching, i.e. if RF was being sent through the wrong LPF for all but one band, or through more than one filter at once, etc.? I get the impression that the filters are switching in when they 'sposed to, in country parlance, though I'll grant that this fails to say whether good connections are being made in the process.? Again, I'll rig up a better test bench and do a more precise analysis.

I made the measurements using a simple oscilloscope with a cap on the pointy end of the probe.? It picked up some stray RF on adjacent points but for the nature of the test, I let that pass.?

RE: "Bias" resistors, I'd assumed that people who've been around for a while here know that when switching from 3904's to 2222's in the driver stage, it's the 20-ohm [emitter] bias resistors that get doubled up for a net 10-ohms.? My bad.? On the matter of the 2N2222's, I found that transistor mod very worthwhile.?

Oh, the audio source??? The microphone and a whistle, which used to yield upwards of 10-12 watts on an analog wattmeter dial on 80/40m and round 6-8 watts on 20m.?

I'll report back....


Tnx,

Ted
K3RTA