Re: Harmonics and Relay Replacement
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Mike this sounds promising. Thanks for the work and feedback.
On Oct 8, 2018, at 4:51 PM, Gordon Gibby <ggibby@...
Wow great work Mike!
On Oct 8, 2018, at 15:54, Mike Doty via Groups.Io <mikedoty@...
I thought I would pass this along, for whatever it is worth. I have two Ver 3 and one Ver 4 uBiTX rigs. I have replaced K3, KT1, KT2, and KT3 relays with Axicom relays which has knocked down the 3rd, 5th, and 7th harmonic levels from -35dB
to below -50dB on all 3 rigs without any board modifications to the LPF circuits. This may be anecdotal but with 3 rigs showing the same results it may be something to consider. I purchased the relays from Mouser - part # 655-V23105A5403A201. Cost was $2.89
per relay plus shipping. I've attached photos (sorry for the blurriness) showing the before and after results on my Ver 4 rig.
--73-- Mike -- W0MNE
<v4_1 axicom spec.jpg>
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