Re: Question about tube testing
It is very hard to damage a tube tester... but an interelectrode
short can do the trick. Usually the meters have a diode in parallel
with their movement to limit current to a safe value.
Hi Chuck - I am sure that's what I did. I fried 2 zener diodes in the meter
circuit, and also took out the bias pot (wirewound) in the process, plus of
course blew the internal fuse (soldered in place)
..
I still don't know exactly what I did, but CTech did a great job
repairing and recalibrating it to factory specs so I'm now very careful
to not do stupid stuff again!
Dave
.
Relevant Pages
- Re: multimeter question
... >> im guessing that is because the meters i have use 3.3v across the leads ... >> and this is triggering a diode or something in the circuit. ...
(sci.electronics.repair) - Re: Amplifier lamp replacement
... I'm wondering if it's possible to open up the meters and replace them, ... of these have two core wires glued on to them. ... I take it to be a diode. ... transistor and the diode is hanging in midair. ...
(sci.electronics.basics) - Re: Amplifier lamp replacement
... I'm wondering if it's possible to open up the meters and replace them, ... of these have two core wires glued on to them. ... I take it to be a diode. ... transistor and the diode is hanging in midair. ...
(sci.electronics.basics) - Re: Amplifier lamp replacement
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(sci.electronics.basics) - Re: Stupid Electronics question
... the chuck with the output. ... If you dont have a transformer for isolation I would check for a short to ground in the magnet. ... Your diode bridge may be the problem. ... I would never reuse a bridge diode unless you have a very good method of testing it. ...
(rec.crafts.metalworking) |
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