In Reply to: Re: here's how you do it for ALL amps. posted by gurevise on September 25, 2002 at 14:34:09:
hey sergey,you're right, of course--it IS a bit dangerous. that's why i emphasized that you should CAREFULY increase the sig gen voltage while keeping an eye on the vac of the secondary. :)
with a 5v output signal, your primary voltage swing will be well within limits.. think turns ratio--if it's a 5k to 8r winding, thats 25:1 turns ratio, so you're talking 25 * 5v or 125vac. this should be fine for any reliable, working condition transformer.
there are other methods of determining output z--including even using another power amp to actively drive the output of the amp under test. unfortunately this requires a separate amp. for this reason, the one i described is the one i use (and incidentally is not relegated to only output stages, but can be used on any stage in the amp).
ken
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Follow Ups
- Re: here's how you do it for ALL amps. - Ken Gilbert 18:19:36 09/25/02 (1)
- Re: here's how you do it for ALL amps. - Pär 22:46:00 09/25/02 (0)