Hello Don Rose I though I'd answered this one. Here goes anyway. It's just a cheap old ETD with A=438,440,441,442,443,444,445. Brand doesn't matter - so long as it's accurate enough. This partic. meter has a needle and dial readout. My arm-and-a-Leg job has different temperaments and any A=x you care to feed into it. This on I use when working with the LPO or the OAE etc. Regards Michael G (UK)
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