Oppinions on shematic please

willy;

The relay can handle high voltage spikes, from the coil, but may fry a HEXFET, unless a high voltage type... I would rather use a PNP high voltage Darlington circuit, and some suppression.

I can even make the Darlington circuit, if not available in one case, thus tailoring gain, voltage, current, etc.

Brian AKA goldigger.

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willy;

55 volts sounds low but if it works, it works. I just got some high current Darlington amps, hFE 1000, that are rated 100 v and may have some at 300 v. I would still use a small heat sink.

The frequency cut-off is immaterial, of course, so I could even  use an old junk-box DS501 (hFE 90/at 4 A- it is rated at 100 w diss, so 3.9 or 4 A at 12 v is about 50%, with 20 kHz cut-off, heh.) And I have lots of heat sinks in my junk-box. I am a firm believer of /if its in the junk-box, dont buy it/!

I really need to stop doing so much email (first rate procrastiation) and start doing some building.

Brian AKA goldigger

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please fisher cz-7a pro shematics.my e-mail address erkan.basar67@hotmail.com . thank you.                 

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