 |
The SZ-70 cross needled SWR movement.
2 May 2019 | by There is a twin SWR cross needled 100uA meter movement, doing the rounds from our friends in China . All you have to do is build a sense circuit and some passive electronics around it.
Who is the first to buy one and do a nice project feature:
From Bangood where I seen it first
Also various suppliers on ebay, but this is the cheapest I have seen from the cuckoo shop:
Have fun!!
3 Responses to “The SZ-70 cross needled SWR movement.”
Please support our generous sponsors who make AmateurRadio.com possible:
 Ham Radio Deluxe |
 Ham Radio Prep |
 KB3IFH QSL Cards  Hip Ham Shirts  HamRadioAuctions Reliance Antennas Enigma Shop |  morseDX  Ni4L Antennas  R&L Electronics antennas.us Ears to Our World |
- Matt W1MST, Managing Editor
One has to wonder why none of the overanxious amateur radio manufacturers haven’t produced a digital readout unit showing forward power, SWR, and maybe even carrier frequency and other metrics. It would seem to be an expected reaction to the boiling water of the IC-7300.
I bought a SZ-70 meter some months ago and made a 50W/10W low power SWR meter. One thing to watch, mine had no fixing method for attaching to the enclosure I put it in. I found the cheapest was on ebay.com.
As for a digital readout, I made one using an Arduino which gave forward and reflected power, SWR and return loss. Make it yourself and don’t pay exorbitant prices of the dealers!!
Have you made the Ardunio project available? Would be interesting to build.