Tascam TSR-8 set up (bias...) + Tascam 58 tension arm rollers

[ecc83]

Yes, correct. But the scenario I describe is one where it’s the same tech and the same machine day in and day out…your circumstance is one where you are servicing different machines on an ongoing basis. In your case I consider it more important to follow the instruction in the manual. In the scenario I describe I think one can easily get away with using the meters *after* learning the machine and acclimating to the meter ballistics using an acceptable AF level meter.

Super! Can I just mention something I may have said in the past? Digital multimeters are great things, for a silly amount of money you can get a superbly accurate* instrument with wide ranging capabilities. But, unless you pay a quite a serious amount, well over $100, all these meters suffer a very restricted accurate response past about 2kHz and some as low as 1kHz. Even the so called "true rms" meters are only that for 'power' frequencies, up to say 400Hz.

*Do remember, your "Avo 8s" and "Simpsons" etc only claimed a FSD accuracy of about 2%...and that as new!

Dave.

 

[sweetbeats]

Yep. 100% true. I often bring that up and ask about the test equipment. I thought that was touched on but now I’m not seeing it…maybe I’m just missing it…but @ecc83 I’m glad you raised the subject. @bleachboy what make and model is your meter (apologies if we already covered this)? The level meter specified in the service manual is called an “AF” level meter. “AF” stands for “audio frequency.” It is a true RMS measuring voltmeter that is rated for accurate measurement across the audio frequency spectrum (generally considered to be 20Hz~20kHz) with a very high input impedance (so as to present a minimal load to the device under test…so it can measure without skewing the measurement).