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Minimal Arts MA12 40m QRP rig signal report

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G0BVZ:
I worked Timo, DL4SU on 40m. He's not a member of the club -yet! He told me he was using an MA 12. I'd never heard of these kit rigs and so I looked it up online later.  It was then I was impressed. The transmitted signal was exemplary (As was Timo's CW!!) The tone was clean, pure with no trace of anything bad. During a 15 min QSO there was no detectable drift: I didn't have to RIT at all. From my end of the QSO it could have been any good commercial rig.

I have no idea how good the rig is on RX but Timo waded through QSB, QRN,QRM without obvious difficulty. The spec includes a 500Hz crystal filter, which has to help.  The design is to satisfy the rules for the QRPCC.de mas contest for transceivers with < 100 components. Full rules at http://qrpcc.de/contestrules/mas/

For a rig with only 2 controls, the MA12 is remarkable.

Vic

IZ5ZCO:
MA12 Minimal Art TRX for 40m CW Band

5 Watt Output

RX Sensitivity better  1µV

Superhet RX, Xtal Filter, Bandwidth < 500Hz

FET VFO 7000kHz - 7040 kHz

10-Turn Potentiometer for fine Tuning

http://www.dl2lto.de/sc/HB_MA12.htm

G0BVZ:
Beautiful link, Nicola. That thing looks good enough to eat!!   ;D

Vic

DF5WW:
It´s a kit from QRP Shop Berlin, made for the minimal art contest. Kit is availible for 69.- € + 19.- € for a case and + shipping.

http://www.qrp-shop.biz/epages/qrp-shop.sf/de_DE/?ObjectPath=/Shops/qrp-shop/Categories/%22DL-QRP-AG%20Baus%C3%A4tze%22/%22MA12%20Minimal%20Art%22

ve3lyx:
Thanks for the link. I had been looking for it myself. Interesting read. I really like the idea of low parts count I performance.
don

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