"Malcolm Stewart" <malcolm_stewart@megalith.freeserve.co.uk>

wrote in message news:btopbv$bc0$1@newsg2.svr.pol.co.uk...

> "Patrick L." <nicework@ifyoucangetit.com> wrote in message

> news:nAJLb.1674$zj7.85@newsread1.news.pas.earthlink.net...

> > Okay, I got a multimeter, and I want to measure the trigger voltage on my

> > 283.

> > Anyone got a tutorial?

> You're only trying to measure your 283's trigger voltage because you've seen

> warnings about the damage that the older units with their high voltages can

> present. So you need a multimeter with a high input impedance when measuring

> volts. Modern DVM style meters are likely to meet this requirement, but the

> older moving coil meters with as little as 1000ohms/volt sensitivity could give

> you a totally false sense of security. If you are limited to a moving coil

> multimeter check that the input impedance is 20,000ohms/volt at least for this

> measurement. It should be marked on the scale plate.

> For the record, I've measured in the region of 270V on my 283s - more than

> enough to fry unprotected input circuits on a camera.

> --

> M Stewart

> Milton Keynes, UK

> www.megalith.freeserve.co.uk/oddimage.htm

> http://myweb.tiscali.co.uk/ms1938/

I trust the person measuring the trigger voltage is careful with

those probes! Awkward as it is to hold two of them (one

in contact with the side strip, one on the center terminal),

one MUST NOT do it holding their metal parts! (Hard way

to find out if the voltage is near 300V, or closer to 6V...;-)

--

David Ruether

d_ruether@hotmail.com

http://www.David-Ruether-Photography.com