In regard to speed/w&f test tape, I would go with this one: https://fixyouraudio.com/product/speed-calibration-tape/ It's best to have 2 different...
Glad you found the problem, the clue that it works fine without a cassette inserted was key and was not mentioned before the previous post. This...
The most common way to measure a belt is by its inner diameter since most belts available by dimension are sold by inner diameter. Folded length...
IPA does dissolve some types of paint, although rare. What I would do is disassemble the case from the unit, polish it (but only lightly as that...
If you can spray some contact cleaner without stripping down the button do it without opening. Also, pay attention to what cleaner you use as...
Watch oil is what should be on the gear posts, so that's good. As long as the reels turn when you turn the driving flywheel by hand, then...
I have both Hakko FX-888D and Weller WE1010, both are very good units. Any of these 2 is a good choice, but availability of tips is something that...
FF and REW work by simply rotating the motor one way or the other. The rotation is transmitted to one reel or the other via a gear with a spring...
The CX20123 was used in the WM-100 and WM-200 series as far as I know, while WM-10/20/30 series use a discrete servo circuit built around a...
I can see the small difference you mention in regard to pinch roller position. Can be related to the position of the roller assy or the dimension...
The best way is to buy a DD unit that is in very bad cosmetic condition, but does still power on. In the vast majority of cases DDs have been...
The NAK-T100 shows 2944Hz, so 56Hz off (that's a LOT). So even if we are to consider a belt unit that shows 3050Hz, with this tape it would still...
Ok, so the part with small reel gear can be ruled out. About changing the pinch roller, of course as stated there is a possibility a second...
The 5.7hours is with 2 x 10440 cells I shown in post #4 assuming all the capacity would be used. In reality, the unit is unable to use more than...
Head sits on a foil spring, so note it's normal to sit at an angle in stop, especially when door is not closed or remvoed. However if it sits at...
HF loss and imbalance are both caused by that tape curling which essentially messes up the azimuth. Head sitting at an angle (when engaged) or...
Backtension is something non-critical in compact cassette machines, since there is a pressure pad that creates tension in the tape and a good...
It's always possible to adjust by ear, but it's something I don't recommend doing as it's not an accurate method of adjusting it. Adjustment...
DDs with quartz lock always measure between 2992Hz and 2997Hz (when they work properly/have been serviced) with a tape I have recorded myself on a...
From the video it's unclear if the curl is just at the head or also at the pinch roller. It would seem like it's just at the head, but don't want...
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