TRX z AD831

[UA1ARN]

(13-05-2012 19:41)SQ4AVS napisał(a):  tego układu nie da się porównać do ne602 bo biję go na głowę ;-)
jeszcze jeden trx na nim
z Kolegów w SP trx na tym scalaku przerobiony DC7 ma SP7OGR

AD831 TRX dl4jal.PDF

Bay the way, i'm looks into attached .pdf and not found any matching circuits at RF input of AD831. I'm use wideband transformer ADT16-6T in old design radio (1:16 == 50:800 OHm matching) for achieve best RF sensetivity.

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(14-05-2012 18:32)SQ4AVS napisał(a):  Hi Genadi
I tested AD831 mixer in my receiver. In my opinion this mixer is much better then passive mixer ADE-1. I use this mixer in my SA in 2-IF. AD831 is very sensitive on LO level. To much LO level increase distortion products. To low LO level decrease conversion loss and IP3.

If optimum is a highest dynamic range - ADE-1 (TUF-1) is a preferrable device (rather AD831). I'm already test this chip and move in position after roofing filter.
Also, sparks eaesy destroy AD831 at input stage.