38869420
Member
Heyo,
TLDR; I need a multimeter that will relatively accurately measure mV down to about 50mV.
I'm not an electronics guy, but i'm slowly learning the important things I need to do to keep my Tascam 388s, 426, 112, Space Echo, old synths & samplers etc running well. So the main reason I want to upgrade my multimeter is i'd like to check the millivolts when I bias my Tascam 388. I want to traditionally bias it (record test tone, listen to test tone, adjust, repeat) instead of doing it by voltage like the manual states. BUT i'd then like to take note of the tapes bias (LPR35, Maxell 35 90 mainly) so I can readjust if need be without having to do the re record & listen method, and to share with my friends & you guys for future reference.
Basically, the 388 has 2 test points on their channel cards that you measure the voltage of 120mV to bias it to the standard tape of the time (457 I think?)
From the manual;
1-5-4. Recording Bias Adjustment
1) Connect AC Voltmeter between TP 2 and TPG ón the REC/PLAY AMP PCB.
2) Adjust trim pots on the BIAS PCB for a 120 mV reading on the AC Voltmeter.
Asides from that, it'd be nice to have a decent multimeter for everything else. So i've been looking at the UNI-T UT139C which seems to be a pretty capable multimeter. Reading the manual for it's voltage measurements it says it goes down to 60mV up to 600mV with an accuracy of 1.0%. The A goes to 20mV & the B to 40mV but seems their upper limit is lowered too.
Not sure which would be most suitable for this job, plus future work as i'm still very much learning. Anyone got any insight, or could recommend a better multi that wont break the bank too bad?
TLDR; I need a multimeter that will relatively accurately measure mV down to about 50mV.
I'm not an electronics guy, but i'm slowly learning the important things I need to do to keep my Tascam 388s, 426, 112, Space Echo, old synths & samplers etc running well. So the main reason I want to upgrade my multimeter is i'd like to check the millivolts when I bias my Tascam 388. I want to traditionally bias it (record test tone, listen to test tone, adjust, repeat) instead of doing it by voltage like the manual states. BUT i'd then like to take note of the tapes bias (LPR35, Maxell 35 90 mainly) so I can readjust if need be without having to do the re record & listen method, and to share with my friends & you guys for future reference.
Basically, the 388 has 2 test points on their channel cards that you measure the voltage of 120mV to bias it to the standard tape of the time (457 I think?)
From the manual;
1-5-4. Recording Bias Adjustment
1) Connect AC Voltmeter between TP 2 and TPG ón the REC/PLAY AMP PCB.
2) Adjust trim pots on the BIAS PCB for a 120 mV reading on the AC Voltmeter.
Asides from that, it'd be nice to have a decent multimeter for everything else. So i've been looking at the UNI-T UT139C which seems to be a pretty capable multimeter. Reading the manual for it's voltage measurements it says it goes down to 60mV up to 600mV with an accuracy of 1.0%. The A goes to 20mV & the B to 40mV but seems their upper limit is lowered too.
Not sure which would be most suitable for this job, plus future work as i'm still very much learning. Anyone got any insight, or could recommend a better multi that wont break the bank too bad?