Recent content by Dan LB

This is what the manual says with regard to adjusting the bias traps....... What am I measuring? DC volts? AC volts? I'm not too sure either where to place probes despite it telling me. Do I measure those caps separately or at the same time with some sort of spitter lead to my DMM's positive...

OK, here's what I've found...... The image below show's the voltages for each leg of the transistors that I've swapped out, according to the schematic, the measurement of the original transistor and the measurement of the replacement transistor There are 4 that I don't have measurements for...

I started my calibration process today. After cleaning the tape path with IPA I spooled up the calibration tape and set the azimuth for the playback head using the scope in X-Y mode to monitor the output of both channels on the machine. Using the 10kHz and 12kHz tones I got it into pretty good...

Hi All, I'm about to embark on calibrating my Sony TC-399. I think I have all I need: Calibration tape (equivalent of Sony J-19-F2 from Gennlab.com) 2ch oscilloscope DMM that will measure VAC and frequency Blank tape (AGFA PEM 468 - I know it's old but I have quite a bit of it and it's in new...

Hi all, Long time lurker around here. This is my first post - sorry that it's a request for help. I need to find a reel table for a Tascam 388. Can anybody help me? Dan