Відео

I recommend you watch the whole video. This is not the software version on the app store, this is the actual instrument which is precisely a millivolt meter, and a rather one pricey one at that.

Thank you for watching, Jack. Yes, I did a video of it here: ua-cam.com/video/EK1g4rAT83U/v-deo.html and test results here: ua-cam.com/video/_O3H0otx8yM/v-deo.html

Yasou Vadim, thank you!

Thank you Nelson. Yes, that's a long trip indeed!

Thanks for watching Johnny!

Either one works. This should get you close enough: www.ant-audio.co.uk/Tape_Recording/Service/Tascam_122mkIII_DD_schematics_small.gif

Thank you Erik, always appreciate your thoughtful comments. Indeed yes, weights could be applied, just like on your car tires. It would be a good thing to do a before and after test on one with a bit more clearance than these. It could even be balanced first, the material removed, weighed, and then taped back in place, eliminating the need to disassemble/reassemble. Maybe after I retire ;-)

Thanks Erik and Happy New Year! I'm working on a 122mk2 I'd like to ask your help on if you're willing. Your knowledge of circuits is far superior to my own, and this one has me stumped. You'll most likely walk right to it ...

Thank you for watching. All of these boards suffer from bad and/or leaking capacitors. In fact, everything from this era using them do. Every overspeed issue I've seen has been solved by recapping. I just uploaded another recapping video here: ua-cam.com/video/5RdaRH0yC_M/v-deo.html

@@asbcustom You're a blessing for creating these video's. I'm more of a ReVox tech, and I've greatly benefitted from your illustrative vids. I'm seeking the cam belt which appears to be square 2mm width, 85-90mm folded length depending on elasticity. I'm also debating whether to drill out the pinch roller axle for a new pinch roller instead of replacing the hole bracket. I don't want to alter the bracket itself and thus securing the new pinch roller will be a challenge if I can't find a c-clip axle instead of punching it like oem is.

@@dubdoodle7191 Thank you. The control belt is a SCQ6.7VP (PRB). Don't use one with a thinner cross-section, it will cause problems. The pinch roller axel isn't difficult to remove. Unless you have a way to accurately open the bores, I would avoid it, a 2-flute twist drill will wander and your new roller will be misaligned. Try scrubbing the oem roller, they are very high quality, and better than anything you're likely to replace it with. I discussed this many times on different videos.

Thank you Vadim and the very same to you and yours! I look forward to trying out the tapes, I know you've put many hours of work into producing them and know they will be top quality!

Thanks Jeremy, happy new year to you and yours!

Thank you so much!

Agreed, they've either been done, or will need to be. Thanks for watching.

That's not a bad idea but you can see how little shaft I have to work with. If it slips off, the balance stand gets trashed. This method is used to balance aircraft tires as well, it works, but takes time, yes.

@@asbcustom да основной недостаток именно, то что будет соскальзывать маховик. Единственное, что можно сделать, чтобы он не соскальзывал это точно от центровать (по горизонталям), но в реальных условиях это практически не реально. Можно сделать очень маленькую амплитуду колебаний. Такую при которой будут минимальные перемещения маховика, тогда возможно он не будет соскальзывать. И подобрать такую частоту при которой он не будет соскальзывать. Это всё нужно проверять на практике. А ещё важны направления колебаний. Достаточна не простая и объемная работа, и скорее всего бессмысленная.

If the shafts had more length to work with, it would be worth doing. As it is, getting the job done is the main goal.

You may not have picked up that I did not swap out any motor parts, I rebuilt the spare motor as an assembly. The factory end play remained untouched.

@@asbcustom I see.

I have a question for you. How are you able to upload the commercial videos without getting a copyright strike? If I play 10 seconds of music, I get demonetized.

@@asbcustom My channel is not monetized, I won't be able to monetize it based on the contents anyway, I do however file a dispute if the video is blocked, If it is an automatic flag it will expire and YT will release the video. I wouldn't take chances if your channel is monetized.

Very good, thanks for the information.

Thanks for watching!

Thanks for watching, Glenn. You didn't buy it from me though, mine don't do uncommanded reverses :) Seriously though, I've never sold a 112R. It shouldn't be too hard to figure out, have you watched it trigger up close with the lid off?

@asbcustom I'm sorry I was thinking you restored this one ok will check out what happens when it goes into reverse thanks for the responce

Thanks for watching. I call those pen brushes: www.amazon.com/GRARRO-Fiberglass-Scratch-Bristles-Cleaning/dp/B0CSJZLTMD/ref=sr_1_10?crid=2QGV4WS0DYO9H&dib=eyJ2IjoiMSJ9.Pj09HjMPkm7Mt3S85tDwg-oqQ1tL0pgYL4UZpVfxWam5D60jeh9fi7rZPO-jLxtRaZ2cSzderf4mah-j2eFA4bwKvdxNJ18PzcfGcMak8F1kK2JhrMwJDByAxz2Wqqkvllck49x3M54X7QAL8LytIw5CeQZCDDT65AjwoRtAs0urWZYU-_9texDYmu3H0ZejjppDU1T-12XKm1GMNkjuEHyTZZbEWt7Fryft333ZtjaZquWbCK8p6E_GwqUJbMalZgPithBXBy6H555v0pKWEnBdzNc6B8tjpbMj7roDE4W5lndfzQqQnuP44NXafudIv1uz0TjcvaBr7LI-NpE3l3iiK9Q0J3DSVGDYPzDGdwo.1B-886jjaoZJjXEAPCpBws4LCtC9RffWR93wVdVBOQI&dib_tag=se&keywords=pen+brush&qid=1735231766&s=hi&sprefix=pen+brush%2Ctools%2C206&sr=1-10 The other tool is called a reamer.

Thank you for watching. I have a variety of level tapes specifically for this purpose.

@@asbcustom OK, and when I have the tapes, where measures you the 620mV: on the PB IC or on the outlet connectors on the back side of the deck or you do not understand my question?

From page 18 of the service manual: 4. Playback System Adjustment 4-1 Playback level Playback a test tape for Dolby standard level (A-BEX TCC-130), Adjust RT101 (Lch) and RT201 (Rch) so that the LINEOUT terminal level is at -2 dB (0.620 V). Lineout terminal is the RCA output jack on the back. Does that answer your question?

@@asbcustom Yes, this is a reasonable answer. Thank you for that. :) But, when you get 0.620V AC at the outputs of the output cinch jacks, then the VU meter does not show -2dB, but 0dB (meaning, the first red diodes on the VU meter are lit). At the same time, the OUTPUT LEVEL potentiometer is turned to maximum (for example, this little detail is not written in the service manual). That's why I asked where exactly you measure these values. BR. Krisz

@pkrisz74 On page 17 it states "OUT PUT volume: Maximum (right side)". I no longer have the deck here or I could possibly check that for you. Looking at the manual again, it doesn't state that the meters should read -2db, it's referencing: "-2 dB (0.620 V)" at the RCA jack. It makes no mention of the deck's meters (which aren't adjustable).

Χριστός Γεννάται!

The only ones I've ever seen polarized on are the aftermarket replacements, all the untouched factory boards I've personally seen are bipolars.

Thank you. It does have a radius, look again and you'll see the barrel shape.

@@asbcustom ясно я это просто не заметил. У вас хорошие приборы для работы. Мне такое не по плечу.

Thanks Mikhail!

Thanks Chris.

3 - 10µf 16v 1 - 1µf 50v 1 - 4.7µf 35v 2 - 3.3µf 25v - bipolar 1 - 1000pf Film cap on C2

Hi, thanks for your valuable information, See you soon, Orlando.@@asbcustom

Hi, the C2 capacitor is 1000pf, how many volts? Thank you.@@asbcustom

I use 100v.

These are bipolar.

So noti polarized? Thank you.

So noti polarized? Thank you.

If you're using Dolby, it might be related to that. Could be a lot of things, including a worn head. Pinch roller pressure would affect every tape similarly, I would think.

Thank you for watching.

You will have to paint those back in. Flat black model paint should do the trick.

Edit- nevermind. The piece is supposed to have a break in it. I just had to flip the idler tire wheels around to get it to sit back in.

Thanks again for your informative video! After replacing my belts and idler tires, my tascam 112 is operating very funky. The head unit is getting in the way of tape eject, instead of playing back, the tape is fast forwarding. When I stop the tape, the supply reel keeps feeding tape, etc etc. Any suggestions what I should be looking for?

Did you replace the control belt?

@@asbcustom yes, control belt, capstan belt, and idler tires. The whole reason I tried replacing everything was because my tape was feeding into the unit, the supply reel was spinning but the takeup reel wasn’t.

@@sbject3664 It sounds as though the control potentiometer may be out of position. The small forks should straddle the bar on the cam. I know I've shown this in detail in other videos. It might take a while but I'll try to find it for you.

It's not exclusive to Tascam, most record heads wear faster because of first contact to the tape. These are very reliable machines and gentle on tapes, I use them myself for archiving. Thanks for watching and for your comments.

​​​​@@asbcustomPlease look at the heads in relation to the pressure pad. I'm sure you will see what I mean. First contact with the tape should make no difference. I agree they are an excellent deck. Worked on and modified many over 30 years. Appreciate your channel. All the best.

You're correct, it looks to be .020-.030 offset towards the record head. Are you saying this is peculiar to Tascams, or have you noticed this on others as well?

@@asbcustom I've only seen it on the Tascam 122 MkII and MkIII, possibly also on some 112's with the 3 heads. I dont know if it's only on these though.

@@oldgoody1 That's good information, thank you. I'll pay attention to this in the future.

The 112b doesn't have a "c" gear. I sell the idler tires here: www.ebay.com/itm/234128158021

Thanks for watching!

Thank you very much, and thank you for watching. The door dampener uses friction grease and an o-ring. The small screw on the back is the adjustment, backing it out a bit should speed up the door for you.

Thank you for your rapid response and I will follow your advice because I know you truly know what you’re doing

Thank you for watching!

Johnny Cash you say? Boy, how would that be. Thanks for watching but I gotta go, I hear the train a comin' ...

Thank you for your kind words.

Thank you.

Thank you so much!

Thank you!

Thanks Vadim!

I don't understand the reference?

Thank you for your kind words, and congratulations on your new mini-lathe! If I may, I'd like to recommend a series of books I think you might enjoy. Firstly, the "Workshop Practice Series", by various authors, and to go along with it, "Fundamentals Of Dimensional Metrology" by Ted Busch. This one will help you avoid all the pitfalls of the inevitable wives tales and superstitions inherent in the discipline. Best of luck on your new endeavor!

@@asbcustom Thank you so, so much for the reply and recommendation of study materials. I would definitely read them. In the mean time, I hope you won't mind I make some inquiry about the essential measurement tools for cassette deck restoration. I've already purchased a digital micrometer as a starter, and I see in your video that you are using lever type DTI gauge a lot to check for concentricity. (I hope I'm getting the tool's name correctly.) I guess it will be the next tool I should purchase?

@@samoworks4648 Really, the next tool would be at least one of the lathe operation books in the series. That will help you to understand better what is needed for the operations you wish to perform. They have quite a few, I read the Myford one about 40 years ago and found it invaluable. It may have been this one: www.amazon.com/Basic-Lathework-Workshop-Practice-Stan/dp/1854862618/ref=sr_1_fkmr0_1?crid=2FQ395G56LSAF&dib=eyJ2IjoiMSJ9.41uLcpV9Roh_E6cpPKZEtd8PxMOxCx-3OcddPdL_Lf18NwTrrVFP-EUUsd0f7T3B.s4Sej4VdLQ0u_z4bMxs7lGCSWrH7Ty0Hk-BjK6BaXJA&dib_tag=se&keywords=workshop+practice+series+myford&qid=1727633230&s=books&sprefix=workshop+practice+series+myford%2Cstripbooks%2C151&sr=1-1-fkmr0

Agreed, they made a plastic chassis, then fitted it with metal parts and surrounded it with a metal case. Their reasoning escapes me?

I only like distortion from guitar amps.

Ha! Thank you!

Yasou Vadim, and thank you!