Another way of checking the speed on a cassette deck is by buying the CD of an album then get the same album on cassette and compare them... that assumes that the cassette transport that mastered the original album and the one that made the copy both had the correct speed LOL...
Nice job man! Question, if my deck ‘ s motor cant be adjusted its possible to do a tiny adjustment changing the belt? For a shorter one or larger one to get the right speed! I have a luxman K-10 . Cheers
Thank for making this video. Your explanation of how the manufacturer are making cassette decks so cheap, was a real wake up for me. Just another subject matter, have you ever use something like WURTH Rubber Care OR a product like it, to re-condition the rubber belts, etc. Thank You for your time.
No, never used Wurth rubber care. The only stuff I have used is rubber renew and it works pretty good for bad pinch rollers and turn table drive idlers.
Would it be the same for a double stereo tape deck , mine is a vintage double stereo kenwood with the amp and tape deck all together. Its the ones that came with the 5 cd changer . Would it be the same to calibrate those type of tape decks?
Don't you have to use the QZZCFM Panasonic test tape to get the speed correct? Since the RS-M275X has a variable speed control internally to alter it's speed, according to the service manual! So how do you know this RS-M275X Quartz lock deck is actually correct anyway without the actual test tape? It's like which came first the chicken or the egg problem... For my Technics SL-1200MK2 record player I was able to use a digital tachometer to verify that the speed was actually 33 1/3 RPM, as also confirmed by the stroboscope on the side of the platter. Great videos BTW I enjoy them a lot.
My RSM275 was calibrated with a calibration tape before I made my custom speed test tapes. I have a set of Sony alignment tapes, the speed test with 1KHz tone, azimuth with 7KHz, torque, and inspection tape that has a cutout, and mirror that allows visual inspection of the tape running over the head and pinch roller. Since they are not sitting in front of me now I can't give you the model number. Anyway I verified the speed of my RSM275 with a frequency counter, and made a few test tapes. It is these "work" tapes that I put into other decks to set up. That way my factory alignment tape is not used any more than it needs to be.
Браво! Отличная идея! Гораздо удобнее и дешевле чем частотомер и провода :)) Bravo! Great idea! It is much easier and cheaper than the frequency meter and wire :))
+331sbf Actually the manufacture used a 1khz tape. I have a sony alignment tape. The thing is a 1khz tape you need a frequency counter to set th speed unless you are a musician with perfect pitch a even then without a reference. So when many techs like myself did was calibrate a deck using our reference tape, then take our audio generator an tune it up to 440 hz, which is the note "a" and make a recording of that on our freshly calibrated deck. Make several "burner" tapes that we used along with a cheap guitar tuner to set the speed of decks in service. That way our 100.00 factory calibration tape was not going in customers decks when it would get chewed up and stretched. The frequency of the tone for speed calibration doesn't matter. Now the 3khz tape you were referring to was for head azimuth alignment. You hooked your scope probes to the 2 audio terminals, put the scope in x-y input, a adjusted the head azimuth for minimum phase error. You just gave m an idea for a new video thanks.
+331sbf I had a sony 1 kHz for speed, and 3 and 10 for alignment and eq. To make a speed tape I use a quartz locked direct drive Technics. When I worked for Sony the audio guys (I was a betamax tech so I didn't work on audio at all) used the 1 k for speed, the 3 and 10 were both used. The 10 primarily when calibrating Dolby circuits. There were also sweep tapes as well but myself I only used 1 and 3 k as that is what was in my services kit. I had 4 tapes. One had an inspection mirror to see the tape running over the heads another had the torque Guage hubs, and then there was my 1 and 3k tapes. That is what was supplied to the shop I worked at. When I left I forgot that they were in my tool box as I did with a set of beta and vhs alignment tapes and an esr meter. (which I had built anyway)
400, 7KHz and 10KHz are the standard tones. They are expecting that someone will use a frequency counter. 440 is the music note "A" so it makes it easy to use a cheap guitar tuner to set the speed.
vikingbeard sure you can. isopropanol alcohol 99% is a good all around cleaner. xylene works great for video and audio heads but don't put that stuff on rubber or plastic as it will melt it. (that is the active solvent of model airplane plastic cement) Freon TF was the best but you can't buy that any more. banned substance. damages the Ozone.
I have Kenwood dubbing deck KXW6080. Have tried cleaning the heads with 91% Isopropyl many times with no success. Deck A and Deck B both will not play left channel after I record. Any suggestions?
I have an issue with recording in my jvc td 711 cassette deck. It records only on one channel and the quality is bad. Playback is excellent, no problem. One of my friends told me that it could be an electronic issue (recording caps).. Can you explain me how to find and fix them ?
Have an old double deck that sounds a bit tired. The belts seem springe, so could this be a motor issue? The motor is a SHU9L. Althoug it has to holes on the back with some black foam inside, there is no adjustment screw. So are some motor just not adjustable. Which one can I substite it with?
So if a tape was made from a deck running slow or fast how would that affect the tone, if 440hz was going in from a tone generator. Excellent content on all you videos thank you.
440 is great for speed calibration as it is the same as the A string on a guitar for a tuner can be used. 3khz is normally for wow and flutter measurement and 7khz for azimuth adjustment.
Is there any repair the deck video tutorial when cassette tape get eaten by deck whenever play one of the cassette on deck? Coz currently facing the issue where cassette deck eat the tape when played it on cassette deck while that cassette plays fluently on other player which is on cassette combo. Do I need to clean the pinch roller or demagnitize or change the belt on cassette deck?
In the service manual to my pioneer ct-400 it says +3db is the "dolby level" when i playback shop recorded tapes the vu meter seems a bit "hot" i thought tapes were supposed to peak at 0db? my music tapes peak around +5db on the vu meter should i set the peak level to 0db with a test tape or +3db? ive set the motor speed it is perfect just having trouble figuring out where the vu display should peak on playback
My three different decks have different levels on VU, of the same recording. Further, one of them has fewer voltage output when indicating nearly plus 6dB. Pioneer s630s (3 heads) made recording 400 Hz 0dB, Yamaha tells it is plus 4 dB other Pioneer tells it is 6 dB. It is a mess. Think only test tape can help.
grate job on the video can you tell me what kind of screw driver you are using to speed up the motor l am trying to do the same thing but I can't get it to turn
I guess I should have asked Philips screw driver or a flat blade because I have seen people using both of them I have tried both with on luck the motor has two wires on it and has the little hole on the top of it with a rubber slit but every time I but the screw driver in it I don't feel anything turning it just speeds up then when you take it out it slows down that's why I was asking what kind of screw driver you where using maybe you can't adjust this one
it looks better then what they make today how come on my sony tck2a it requires a line fuse on europen modle but not on us modle i put one in 3 tenths of amp thanks
My 80s Sony Boom box just went slow ... I kept it only to have one cassette tape deck to use for old tapes...but you have special equiptment there.. what would make mine just go slow so the voices are all slow baritones??
+gacj2010 I don't us special equipment. I have a calibration tape and a cheap guitar tuner. What can cause your tape player to go slow could be a slipping belt, or lubricant dried up on capstan shaft, also could be the motor. Should be a speed adjustment on the motor.
The carpet does nothing to dissipate ESD. ESD is not really a concern for this type of electronics, and componets in general are relatively safe in the curcuit. Where the problem happens is with unmounted componets, being handled by an ungrounded body. Your body acts like a capacitor and can store enough energy to destroy electronics. But again, once the unit is in a metal chassis, just touching the metal chassis will discharge any build up in your body. At work when we are pulling delicate cards out of equipment, then yes the wrist strap is needed, and if I was working with computer processors, and memory, cards motherboards ect, then I would be grounded, but VCRs TVs audio components ect. They are not that sensitive to it.
I think you mean de-magnetization.Heads used for playback will over time pick up a magnetic charge from the tape. No different than if you rub a magnet on a screw driver the steel in the screw driver will become magnetized and pick up screws.de-magnetization of the head removes this built up magnetization. When a head becomes magnetically charged it will affect the high frequency playback more than anything.Most 2 head decks have a built in demagnetizing circuit. This is the record bias oscillator. Simply putting the machine into record will generate the AC record bias signal, and that will neutralize the magnetic charge in the head. 3 head decks on the other hand, and playback only decks such as car players and Walkman, or portable tape recorders with DC record do need to be manually de-magnetized using a demagnetizing unit.This is basically a coil of wire with a metal probe covered with a rubber tip to prevent scratching the head. You plug the unit it, and the AC magnetic field produced will de-magnetize the head when you bring the probe up to the head, pass over it a few times, and slowly move away from the head.
How can i set it correclty? this is changing recording quality. When i turn it all the way up it will blow away high frequences and recording sounds really bad but when i turn it to minimal the recording quality is better but still not good enough.
Sounds like you are talking about what the rest of us refer to as record bias.That lets you fine tune the bias signal to the tape formulation.Too much bias and you will loose high frequency, too low and the recording sounds muddy.Some better decks have a self bias feature that runs a frequency sweep and calibrates itself (My old Teac does that) but most it is a manual control, and it is trial and error. Record a few seconds, play it back, adjust it slightly do an other test and play back..Eventually you will find a spot that has the sound that is pleasing to your ear. Of course change brands of tape and you have to set it again.
+cm2881 I can make you a reference tape with my audio generator and quartz locked, calibrated direct drive Technics RSM275 deck.I have made a few for people. I always use 440hz for speed as a cheap guitar tuner works perfect for this as 440 Hz is the musical note A.
Can you please try to say Tech-nics not TechniQuEs as there is no Q or E in the brand name - Tech -NICS as it's REALLY SUPER fuckin' annoying !!!! ..... Otherwise love everything you do !!! xxxx Hahahahha !!
You don't be scrubbing heads like that ..That is too much pressure on them by making a squeaking noise and will cause damage. ..You gently rub over them
TOP DAWG Right ok you know more than the rest of us. Heads are metal, rubbing them won't hurt them. The squeaking is the binder that had contaminated the head being cleaned off.
Thats ingenious, I happen to be a guutar player🎉
Another way of checking the speed on a cassette deck is by buying the CD of an album then get the same album on cassette and compare them... that assumes that the cassette transport that mastered the original album and the one that made the copy both had the correct speed LOL...
Nice job man! Question, if my deck ‘ s motor cant be adjusted its possible to do a tiny adjustment changing the belt? For a shorter one or larger one to get the right speed! I have a luxman K-10 . Cheers
Thank for making this video. Your explanation of how the manufacturer are making cassette decks so cheap, was a real wake up for me.
Just another subject matter, have you ever use something like WURTH Rubber Care OR a product like it, to re-condition the rubber belts, etc. Thank You for your time.
No, never used Wurth rubber care. The only stuff I have used is rubber renew and it works pretty good for bad pinch rollers and turn table drive idlers.
Great, Ten Four on your reply. Keep making videos and I will make time to watch than.
Would it be the same for a double stereo tape deck , mine is a vintage double stereo kenwood with the amp and tape deck all together. Its the ones that came with the 5 cd changer . Would it be the same to calibrate those type of tape decks?
Good video! Why not use a 3000 hz cassette ? 440 hz is recommended?
3khz is better for measuring W/F but for speed that is not important. A 440 tape is just fine, and guitar tuners are very accurate
@@12voltvids thanks for your time and answer!
Don't you have to use the QZZCFM Panasonic test tape to get the speed correct? Since the RS-M275X has a variable speed control internally to alter it's speed, according to the service manual! So how do you know this RS-M275X Quartz lock deck is actually correct anyway without the actual test tape? It's like which came first the chicken or the egg problem... For my Technics SL-1200MK2 record player I was able to use a digital tachometer to verify that the speed was actually 33 1/3 RPM, as also confirmed by the stroboscope on the side of the platter. Great videos BTW I enjoy them a lot.
My RSM275 was calibrated with a calibration tape before I made my custom speed test tapes. I have a set of Sony alignment tapes, the speed test with 1KHz tone, azimuth with 7KHz, torque, and inspection tape that has a cutout, and mirror that allows visual inspection of the tape running over the head and pinch roller. Since they are not sitting in front of me now I can't give you the model number. Anyway I verified the speed of my RSM275 with a frequency counter, and made a few test tapes. It is these "work" tapes that I put into other decks to set up. That way my factory alignment tape is not used any more than it needs to be.
Браво! Отличная идея! Гораздо удобнее и дешевле чем частотомер и провода :))
Bravo! Great idea! It is much easier and cheaper than the frequency meter and wire :))
Is the motor the same as in a kenwood kx4520 deck? And what type of micro screwdriver did you use? + or - screwdriver?
Don't know.
very clever using the 440hz tone. makes me wonder why some deck manufacturers use 400hz.
+331sbf
Actually the manufacture used a 1khz tape. I have a sony alignment tape. The thing is a 1khz tape you need a frequency counter to set th speed unless you are a musician with perfect pitch a even then without a reference. So when many techs like myself did was calibrate a deck using our reference tape, then take our audio generator an tune it up to 440 hz, which is the note "a" and make a recording of that on our freshly calibrated deck. Make several "burner" tapes that we used along with a cheap guitar tuner to set the speed of decks in service. That way our 100.00 factory calibration tape was not going in customers decks when it would get chewed up and stretched. The frequency of the tone for speed calibration doesn't matter. Now the 3khz tape you were referring to was for head azimuth alignment. You hooked your scope probes to the 2 audio terminals, put the scope in x-y input, a adjusted the head azimuth for minimum phase error. You just gave m an idea for a new video thanks.
+331sbf
I had a sony 1 kHz for speed, and 3 and 10 for alignment and eq.
To make a speed tape I use a quartz locked direct drive Technics. When I worked for Sony the audio guys (I was a betamax tech so I didn't work on audio at all) used the 1 k for speed, the 3 and 10 were both used. The 10 primarily when calibrating Dolby circuits. There were also sweep tapes as well but myself I only used 1 and 3 k as that is what was in my services kit. I had 4 tapes. One had an inspection mirror to see the tape running over the heads another had the torque Guage hubs, and then there was my 1 and 3k tapes. That is what was supplied to the shop I worked at. When I left I forgot that they were in my tool box as I did with a set of beta and vhs alignment tapes and an esr meter. (which I had built anyway)
+331sbf
A 60 or 46 preferred. 90 is thinner and tends to stretch.
To make an azimuth a mono deck is required
400, 7KHz and 10KHz are the standard tones.
They are expecting that someone will use a frequency counter.
440 is the music note "A" so it makes it easy to use a cheap guitar tuner to set the speed.
Even though the proper musical notation of A is 432hz
Thanks for the great video!
What kind of liquid did you use cleaning the heads and roller? I've heard you can't clean both with same?
vikingbeard
sure you can. isopropanol alcohol 99% is a good all around cleaner. xylene works great for video and audio heads but don't put that stuff on rubber or plastic as it will melt it. (that is the active solvent of model airplane plastic cement)
Freon TF was the best but you can't buy that any more. banned substance. damages the Ozone.
Thanks a lot for the good advices!
I have Kenwood dubbing deck KXW6080. Have tried cleaning the heads with 91% Isopropyl many times with no success. Deck A and Deck B both will not play left channel after I record. Any suggestions?
I have an issue with recording in my jvc td 711 cassette deck. It records only on one channel and the quality is bad. Playback is excellent, no problem. One of my friends told me that it could be an electronic issue (recording caps).. Can you explain me how to find and fix them ?
Could be a number of things.
Have an old double deck that sounds a bit tired. The belts seem springe, so could this be a motor issue? The motor is a SHU9L. Althoug it has to holes on the back with some black foam inside, there is no adjustment screw. So are some motor just not adjustable. Which one can I substite it with?
Very good
So if a tape was made from a deck running slow or fast how would that affect the tone, if 440hz was going in from a tone generator. Excellent content on all you videos thank you.
Certified quartz lock tape deck.
I have a Kenwood KX-50 tape deck that was given to me with the rest of the stereo system. Need belts to run the tape deck though.
hello, I can ask, please, why does someone use 3khz and someone 440hz, somehow I do not understand 🤔🤔🤔🙏🙏🙏
440 is great for speed calibration as it is the same as the A string on a guitar for a tuner can be used. 3khz is normally for wow and flutter measurement and 7khz for azimuth adjustment.
@@12voltvids thanx 🤗
Is there any repair the deck video tutorial when cassette tape get eaten by deck whenever play one of the cassette on deck? Coz currently facing the issue where cassette deck eat the tape when played it on cassette deck while that cassette plays fluently on other player which is on cassette combo. Do I need to clean the pinch roller or demagnitize or change the belt on cassette deck?
In the service manual to my pioneer ct-400 it says +3db is the "dolby level" when i playback shop recorded tapes the vu meter seems a bit "hot" i thought tapes were supposed to peak at 0db? my music tapes peak around +5db on the vu meter should i set the peak level to 0db with a test tape or +3db? ive set the motor speed it is perfect just having trouble figuring out where the vu display should peak on playback
My three different decks have different levels on VU, of the same recording. Further, one of them has fewer voltage output when indicating nearly plus 6dB. Pioneer s630s (3 heads) made recording 400 Hz 0dB, Yamaha tells it is plus 4 dB other Pioneer tells it is 6 dB. It is a mess. Think only test tape can help.
The cassette mechanism remind me of a tanashin mechanism or a very similar one
You know a standard FLUKE 101 multimeter on its "Hz" setting will be extremely accurate for speed calibration.
I don't have a fluke 101, I have a fluke 12.
Very nice
grate job on the video can you tell me what kind of screw driver you are using to speed up the motor l am trying to do the same thing but I can't get it to turn
It is just a jewlers screw driver that you can buy cheap. They come in a kit with typically 5 different sizes. Usefull for eyeglasses too.
I guess I should have asked Philips screw driver or a flat blade because I have seen people using both of them I have tried both with on luck the motor has two wires on it and has the little hole on the top of it with a rubber slit but every time I but the screw driver in it I don't feel anything turning it just speeds up then when you take it out it slows down that's why I was asking what kind of screw driver you where using maybe you can't adjust this one
Yes you are hitting the control and shorting something. Usually it is a small philips, but some use a slot trimmer.
Thanks for your help I finally got it to work with a flat head screw driver I did not know I had to go that far in the motor.Thanks again
have you heard the 12voltvids diss track, about the Kenwood cassette deck flywheel?
Very clever!
it looks better then what they make today how come on my sony tck2a it requires a line fuse on europen modle but not on us modle i put one in 3 tenths of amp thanks
+David Berquist
In the US model it is inside the transformer. Thermal fuse. In Europe they run on 240v and everything has to have a fuse in the plug.
My 80s Sony Boom box just went slow ... I kept it only to have one cassette tape deck to use for old tapes...but you have special equiptment there.. what would make mine just go slow so the voices are all slow baritones??
+gacj2010
I don't us special equipment. I have a calibration tape and a cheap guitar tuner. What can cause your tape player to go slow could be a slipping belt, or lubricant dried up on capstan shaft, also could be the motor. Should be a speed adjustment on the motor.
12voltvids Thank you ..smart skilled man
thank you for this...
12voltvids
is there a reason why you're using a carpet as the mat? wouldn't that just increase the chances of an ESD?
The carpet does nothing to dissipate ESD. ESD is not really a concern for this type of electronics, and componets in general are relatively safe in the curcuit. Where the problem happens is with unmounted componets, being handled by an ungrounded body. Your body acts like a capacitor and can store enough energy to destroy electronics. But again, once the unit is in a metal chassis, just touching the metal chassis will discharge any build up in your body. At work when we are pulling delicate cards out of equipment, then yes the wrist strap is needed, and if I was working with computer processors, and memory, cards motherboards ect, then I would be grounded, but VCRs TVs audio components ect. They are not that sensitive to it.
ahhh, understood, 12voltvids. thanks for the explanation!
This was the end of the cassette tape
hello i have an question. what is pre magnetization and how to correct it on cassette deck?
I think you mean de-magnetization.Heads used for playback will over time pick up a magnetic charge from the tape. No different than if you rub a magnet on a screw driver the steel in the screw driver will become magnetized and pick up screws.de-magnetization of the head removes this built up magnetization. When a head becomes magnetically charged it will affect the high frequency playback more than anything.Most 2 head decks have a built in demagnetizing circuit. This is the record bias oscillator. Simply putting the machine into record will generate the AC record bias signal, and that will neutralize the magnetic charge in the head. 3 head decks on the other hand, and playback only decks such as car players and Walkman, or portable tape recorders with DC record do need to be manually de-magnetized using a demagnetizing unit.This is basically a coil of wire with a metal probe covered with a rubber tip to prevent scratching the head. You plug the unit it, and the AC magnetic field produced will de-magnetize the head when you bring the probe up to the head, pass over it a few times, and slowly move away from the head.
How can i set it correclty? this is changing recording quality. When i turn it all the way up it will blow away high frequences and recording sounds really bad but when i turn it to minimal the recording quality is better but still not good enough.
Sounds like you are talking about what the rest of us refer to as record bias.That lets you fine tune the bias signal to the tape formulation.Too much bias and you will loose high frequency, too low and the recording sounds muddy.Some better decks have a self bias feature that runs a frequency sweep and calibrates itself (My old Teac does that) but most it is a manual control, and it is trial and error. Record a few seconds, play it back, adjust it slightly do an other test and play back..Eventually you will find a spot that has the sound that is pleasing to your ear. Of course change brands of tape and you have to set it again.
Thanks a lot! That helped very much. I got it working.
They could have fit that into a unit possibly a third of the size. Probably the only reason it wasn't was so that it could be stacked.
Very similar to my Pioneer CT-225 Tapedeck
Most are very similar. Unill you get into the really high end units like my Technics, then you are talking a totally different animal.
you know what you are doing ... I would be lost
However my top end sony walkman has a tiny flywheel and is excellent for regulating speed, its all about power to weight ratios.
Very nice ... :-) +1
Kenwood probably charged top dollar for that deck. Nothing in there. Even the board looks bigger than it needs to be.
Thanks for showing how to do this, where I can buy a reference tape? Can you sell me a copy, I can pay via PayPal.
+cm2881 I can make you a reference tape with my audio generator and quartz locked, calibrated direct drive Technics RSM275 deck.I have made a few for people. I always use 440hz for speed as a cheap guitar tuner works perfect for this as 440 Hz is the musical note A.
+12voltvids thank you. I will private message you my email address and we can take it from there
Can you please try to say Tech-nics not TechniQuEs as there is no Q or E in the brand name - Tech -NICS as it's REALLY SUPER fuckin' annoying !!!! ..... Otherwise love everything you do !!! xxxx Hahahahha !!
You don't be scrubbing heads like that ..That is too much pressure on them by making a squeaking noise and will cause damage. ..You gently rub over them
TOP DAWG
Right ok you know more than the rest of us.
Heads are metal, rubbing them won't hurt them. The squeaking is the binder that had contaminated the head being cleaned off.
Where’s the fuse
Inside the power transformer, so when it pops, the unit is done.
slm hello sony deck tc-we675 sound and recording settings are not good at all tastes do not like you here masters like you can do
must remember to never buy a Kenwood tape player thats awful
Their top of the line models are actually amazing.
@@svenschwingel8632 JVC and teac are the best to my ears