Geri,
Does anyone of you have a proven scheme of a small linear PA available,
that delivers about 2 or 3 Watts from 10 mW, preferably from 18 Volts
(which is the voltage used by the exciter)? I am sure a small audio
amplifier would do ...
I have spent months fighting the TDA2030 which is only marginally stable.
About three weeks ago I tried a LM1875, which has better bandwidth and
can be used down to a closed loop gain of 10dB. I am now using three
(one preamp and two in a bridge circuit) to drive two of David MRF
amplifiers in parallel. This IC is specified for +/- 24v but seems to
work quite happily on +/- 12v.
73, Brian
73 Brian CT1DRP IN51QD 41 09 58N 08 39 11W
http://homepage.esoterica.pt/~brian
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