Probes for DuMont Oscillograph Model 292

[Rob]

I'll be installing replacement caps for the CRT deflector plates this
weekend and firing it up for testing. The probe connections on this
unit are standard banana type, like for typical multi-meters. Will my
multi-meter probes be good enough, or is there a special type of probe
that is needed? Any suggestions on what to measure (ie household
current) for a quick test? Unit does power up, but had problems
centering the trace...

 

[hr(bob) [email protected]]

I'll be installing replacement caps for the CRT deflector plates this
weekend and firing it up for testing. The probe connections on this
unit are standard banana type, like for typical multi-meters. Will my
multi-meter probes be good enough, or is there a special type of probe
that is needed? Any suggestions on what to measure (ie household
current) for a quick test? Unit does power up, but had problems
centering the trace...

Regular bananna plug/jacks should be ok as long as you are not
measuring voltages high enough to break donw the connectors, and that
doesn't seem likely.

 

[[email protected]]

I'll be installing replacement caps for the CRT deflector plates this
weekend and firing it up for testing. The probe connections on this
unit are standard banana type, like for typical multi-meters. Will my
multi-meter probes be good enough, or is there a special type of probe
that is needed? Any suggestions on what to measure (ie household
current) for a quick test? Unit does power up, but had problems
centering the trace...

Don't know what Vin(max) would be for this scope, but I wouldn't
recommend 117V. Try a convenient wall wart, or spare doorbell
transformer. Using coax rather than multimeter probes would be
more accurate for higher frequencies.

TM

 

[Sam Goldwasser]

Don't know what Vin(max) would be for this scope, but I wouldn't
recommend 117V. Try a convenient wall wart, or spare doorbell
transformer. Using coax rather than multimeter probes would be
more accurate for higher frequencies.

With banana jacks standard, I doubt this thing has a bandwidth more than
100 kHz, maybe less.

Once you get tire of looking at 60 Hz AC, try the output of an audio
system (walkman, CD player, etc.). I wouldn't risk an Ipod until you
know it isn't going to zap it though!

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