
sweetbeats
Reel deep thoughts...
Here's the thing...you may want to check the record frequency response. Look at page 17 of the Owner's Manual, step 9. Set your oscillator for 18kHz at your reference level (-10dBv or 0.316VAC RMS) and then record the 18kHz tone. While recording monitor off the reproduce head and look at the level on the VU meter. Is it at "0"? If not, adjust R108 until the reproduce level of the 18kHz tone is also about 0VU like the 1kHz was. I ran into this issue with my Tascam 58. I think somebody had whacked the record eq to the point that there was so much HF gain the bias amp wasn't strong enough to bias the tape to handle the signal properly.
The trick is that they go hand in hand so you'll have to do a gross inital adjustment of the record eq, rebias, recheck the record eq, maybe even rebias again.
You need to get a test tape my friend. You realize that all the above is also dependent on your reproduce frequency response. Somebody could have whacked the setting of R102, the "MONITOR EQ" trim pot and you can only set that family of trimmers (R101 ~ 104) with the calibration tape.
You're getting there.
The trick is that they go hand in hand so you'll have to do a gross inital adjustment of the record eq, rebias, recheck the record eq, maybe even rebias again.
You need to get a test tape my friend. You realize that all the above is also dependent on your reproduce frequency response. Somebody could have whacked the setting of R102, the "MONITOR EQ" trim pot and you can only set that family of trimmers (R101 ~ 104) with the calibration tape.
You're getting there.