Good work, I'm starting to appreciate how some of these tape decks can be so tough to work on. Fairly recent subscriber here. I used to service professional video equipement back in the 90's - betacam, u-matic etc
Very informative video for those who will have to do tape transport electrical alignment. I remember i have done that one too for my k666es, damn that took some time... Cheers mate!
It might be cursed by its model number ;-) Regarding your brakes, I used heat shrink also on one of my own, not the glued type, but it's not skipped a beat so far, so it's probably okay. Since then, I found some small fuel hose at my chainsaw store, I know you have one or two of those up there. It's kind-of a yellowish-green transparent color, very flexible like urethane, and will probably last several lifetimes. Nice work sticking with it and getting it done!
Thanks again for the lamps! I ordered some latex surgical tubing as a more permanent solution for the brakes. The heatshrink doesn't stop the reels well enough and it tends to really yank hard on the tape when it reaches the end in rewind and fast forward.
I'm only 10 minutes in. What I would put in the positions of those bipolar caps is RM5 WIMA film capacitors, they are available up to 4.7uF, and will never change their values, unlike electrolytics. Although I don't yet get how these are critical for alignment, because they are seemingly just snubber capacitors to protect the driver from the inductive spikes of the motor coils. I have to replace those capacitors in my Technics direct drive decks, I will probably use WIMAs, but because the ESR of the WIMAs is much lower (IIRC 0.05 ohm range, while the original bipolar SMD electrolytics are about 5-8 ohms), I will put 4.7 ish resistors in series with them, to prevent unwanted load on the driver IC.
Heat shrink gets too slippery to mimic a rubber part. After heating, roughen the surface with sandpaper and then treat it with either 'Rubber Renue' or another aggressive rubber cleaner. This will give it grip.
I wonder how the direct drive (magnetic) reels would affect the tape recordings over time as they are in pretty close proximity to the cassettes. Would Sony have used MU metal to shield the reels from the cassette compartment?
Apologies if I missed it, but did you check the wow and flutter figure? It should be 0.025%. I presume that means 0.05% for combined record and playback.
It's not in the video but I did check it. I'm waiting for the next wow and flutter video for that, which should be pretty soon now. I have enough new decks serviced that I want to see if the RS-B755 is still the best one I have for making 3kHz tapes. I also got new software I'm trying to get used to. The deck should do the same number for both recording and playback - it's not additive.
На сколько я понял, новые прижимные ролики не имеют бронзовой втулки и состоят целиком из бронзы. Кто-то уже выяснил, что латунь съедает ось. На aliexpress можно купить ролики с пластиковой основой, дёшево и с отличным качеством.
I love this mechanism, if one mechanism should be copied it's this one, with modern electronics obviously, because everything can be 💯 automatic, including the configuration.
![Noob To Max With DRAGON REWORK In Blox Fruits [FULL MOVIE]](http://i.ytimg.com/vi/LnBMOinoOvA/mqdefault.jpg)
Good work, I'm starting to appreciate how some of these tape decks can be so tough to work on. Fairly recent subscriber here. I used to service professional video equipement back in the 90's - betacam, u-matic etc
I can not believe the complexity of this tape deck. More impressive is your knowledge. Nice work.
Very informative video for those who will have to do tape transport electrical alignment. I remember i have done that one too for my k666es, damn that took some time... Cheers mate!
I am restoring a JVC TD504. I am grateful for its simpler design, mechanicals & big flywheels. I COULD NEVER HANDLE the tuff ones like you. ❤
It might be cursed by its model number ;-) Regarding your brakes, I used heat shrink also on one of my own, not the glued type, but it's not skipped a beat so far, so it's probably okay. Since then, I found some small fuel hose at my chainsaw store, I know you have one or two of those up there. It's kind-of a yellowish-green transparent color, very flexible like urethane, and will probably last several lifetimes. Nice work sticking with it and getting it done!
Thanks again for the lamps! I ordered some latex surgical tubing as a more permanent solution for the brakes. The heatshrink doesn't stop the reels well enough and it tends to really yank hard on the tape when it reaches the end in rewind and fast forward.
Recommended by Sony was graphite lithium grease for the roller and ball bearings on the playback mechanism.
I'm only 10 minutes in. What I would put in the positions of those bipolar caps is RM5 WIMA film capacitors, they are available up to 4.7uF, and will never change their values, unlike electrolytics. Although I don't yet get how these are critical for alignment, because they are seemingly just snubber capacitors to protect the driver from the inductive spikes of the motor coils.
I have to replace those capacitors in my Technics direct drive decks, I will probably use WIMAs, but because the ESR of the WIMAs is much lower (IIRC 0.05 ohm range, while the original bipolar SMD electrolytics are about 5-8 ohms), I will put 4.7 ish resistors in series with them, to prevent unwanted load on the driver IC.
I think there was pulverized mica in the original grease Sony used on the head block assembly.
Heat shrink gets too slippery to mimic a rubber part. After heating, roughen the surface with sandpaper and then treat it with either 'Rubber Renue' or another aggressive rubber cleaner. This will give it grip.
Hi! Where can i find that alignment gauge?
I got mine from Willy Hermann, who was moving away from selling them at the time. I'm not sure he has any left.
@@Oklawolf
Me: you can ask Hermann for more alignment gauges
You: **What a great idea! Why did I not think of that?**
I wonder how the direct drive (magnetic) reels would affect the tape recordings over time as they are in pretty close proximity to the cassettes. Would Sony have used MU metal to shield the reels from the cassette compartment?
I'm not sure the magnetic field would be close or strong enough to matter - maybe the cover plate in this deck has been engineered to help with that.
What a complicated machine, wow
Apologies if I missed it, but did you check the wow and flutter figure? It should be 0.025%. I presume that means 0.05% for combined record and playback.
It's not in the video but I did check it. I'm waiting for the next wow and flutter video for that, which should be pretty soon now. I have enough new decks serviced that I want to see if the RS-B755 is still the best one I have for making 3kHz tapes. I also got new software I'm trying to get used to. The deck should do the same number for both recording and playback - it's not additive.
Thank's Your video i learn english!
На сколько я понял, новые прижимные ролики не имеют бронзовой втулки и состоят целиком из бронзы. Кто-то уже выяснил, что латунь съедает ось. На aliexpress можно купить ролики с пластиковой основой, дёшево и с отличным качеством.
Isn't 666 ...the devil's number?
It's a very appropriate number for this deck.
My advice, Don't buy ever complicate Audio Decks. The '70 decks are the most simple and stronger.❤
it's a sony
I love this mechanism, if one mechanism should be copied it's this one, with modern electronics obviously, because everything can be 💯 automatic, including the configuration.