Re: Harmonics and Relay Replacement
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Regarding the relay spec differences, can anyone open the case of the "good" and the "bad" and take photos of the innards? It would be instructive to all of us to understand how to choose relays for future applications.
--Ron? ? N7FTZ
On Mon, Oct 8, 2018 at 9:38 PM Mike Doty via Groups.Io <mikedoty= [email protected]> wrote: Good evening Kees,
As I said in an earlier post, with the Axicom relays installed in 3 different rigs, I am not seeing any harmonic greater than -50dBm on any band from 80 thru 10 mtrs.? I have fuzzy pictures of the SA results for each band but I didn't want to take up server space posting them here.? I can make them available to anyone that wants them but the files are large.
Looking at the 3 rigs I have I found two different brands of relays installed, Hongfa and Virtual.? Readingt the datasheets for both brands and the Axicom relays the only difference I can see in the specs presented is a difference in coil resistance.? Notably though, neither datasheet for the installed brands gives a spec for RF isolation which makes me wonder whether they are actually rated for RF usage.? The datasheet for the Axicom indicates -39dB at 100 MHz.? I can't think of any other explanation for the results I'm getting but, as I also said in an earlier post, these are MY results that I have passed along for consideration.? For me, I'm satisfied with what I'm seeing.
--72-- Mike --? W0MNE
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