The SZ-70 cross needled SWR movement.

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!!

Steve, G1KQH, is a regular contributor to AmateurRadio.com and writes from England. Contact him at [email protected].

3 Responses to “The SZ-70 cross needled SWR movement.”

  • Bill KI7HYI:

    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.

  • Clive GM4FZH:

    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!!

  • Tom, KA4CSG:

    Have you made the Ardunio project available? Would be interesting to build.

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