--- In TekScopes@..., "Steve Hogan" <stevehogan@s...>
wrote:
Hi all,
I am considering acquiring a 577/D1 curve tracer with a 177 fixture
that was "rejected" by a cal lab. Studying the specs, it seems much
more versatile than the 71CTN that I was previously interested in.
100 watts available vs 1/2 watt for the 71CTN.
Are there common (unfixable) problems that plague the 577/D1 that
would make it a poor gamble? Problems with the power transformer,
CRT, or unavailable hybrids, etc.
Is the 577 a decent instrument? I've never owned a curve tracer,
and I think it would be useful for matching transistors for audio
preamps and amps.
Thanks,
Steve Hogan
----------
The 577/177 is a quite reliable instrument even though I personally
like the 576 better. The only common unfixable problem I can think of
is that the 177 Current/div switch quite often became intermittent at
certain settings (around 1 mA/div) due to mechanical wear. Could
easily be determined by connecting a 1k resistor between C and E and
turn up the Collector supply to display a 45 degree straight line and
then wiggle the Current/div knob.
/Zenith, Sweden
