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Salvation of a Studer B67

kronborg

New Member
Hi folks
This is my first post here at AudioKarma. I am the one helping Søren Hammer restoring his Sony TC-378 in another thread.

Long story:
I run a small recording studio in Esbjerg in the southern Denmark. It's the rehersal space for one of my bands, where the singer is very wealthy. He bought this house cash, where we have built a studio, I have my electronics workshop and where we rehearse.
The studio is built up around an old Soundcraft 800B desk. I have a pair of Yamaha NS-1000M for monitors and a Yamaha MX-1000 power amp driving them. The rest of our equipment might not interest you hi-fi guys as much.

I decided to go buy me a real two-track mastering deck. Until now, I had used my Teac X-2000R for these tasks, but since it's a quarter track pro-sumer deck with a max speed of 7½ ips, it wasn't really suited for professional use, though it sounded okay. It will return to my home setup instead, where it will stand and look sexy. Earlier this year I did buy some second hand tapes from a guy on the internet. Most of the tapes I bought were Agfa PER-525, which I found out had very bad case of sticky shed syndrome. I have since scrapped most of the tape and kept the reels. There were some very nice Revox metal reels. This guy had a couple of r2r decks he were willing to sell. At that point I wasn't interested. 6 months later (just about yesterday) I decided to write to him again. He had a Studer A67 and a B67. I decided to go look at the B67. It was very very dirty, filled with tape dust from the aforementioned crappy tapes, but I could see that the butterfly heads were in very good shape with plenty of hours left in them. I did put a tape on the machine and checked the mechanical functions (breaks, motors, speed, etc). The only problem was that I could not test the electronics or hear the machine play. He told me that the machine should work, and should have had regular services. It was originally owned by the national broadcasting service in Denmark and later by a R2R enthusiast who owned over 15 of these machines. I took the chance and bought the deck, for 3000DKK, which equals 525USD. He actually wanted around 850 bucks for the machine. Well, I took it back to the workshop with help from Søren. We looked the machine over, and began cleaning it.

Here is the first part (day one and two) of the process in pictures:
We started by removing the head shell and began cleaning the heads. Apparently the previous and now deceased owner (the decks were given to a friend of his, the guy I bought it from) had a thing for sticker letters. There was slapped a Revox logo on the front, and "Studer B67" was sticked to the head shell. I removed these, because I want the machine to be all original.
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Head assembly right after the first round of cleaning
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The heads, tape guide and capstan were filled with tape dust from bad tapes. As you can see, the pinch roller is done, finished, kaput, finito... It works though, and will have to do for now until I get a new one!
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And this is the first bunch of cotton buds used for cleaning the heads and guide. We used a cloth and other cleaning materials too, though I forgot to photograph those
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Getting rid of the bad tapes is very important, so they can't contamiate my machines. This is one half of a 10½" reel.
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Removing the whole head assembly to clean the guts of the machine. I removed the front too, but I didn't take a photo. Maybe another day...
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The next project was to replace the electrolytic capacitors in the electronics. I was not sure wether the machine needed it or not, but since it's from 1978, I figured it would be a good idea to do anyways. To my own luck, the machine does not contain very many electrolytic caps, most of them are tantalum, also in the signal path, but I will return to that later.
I removed the rear cover. Here is the beautiful engine compartment of the machine
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I started removing the PCBs one by one, replacing the few electrolytic caps that were actually on there. I replaced them with high quality Rubycon, Philips and Panasonic caps, all rated at 105 degrees. They were just what I had lying round the workshop.
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I use a very nice Weller WSD81 soldering station for these kind of jobs. It's a high quality soldering tool, that I got from my work. Here is some more recapping:
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The kitchen/lunch room at the studio is converted to a temporary tape repair workshop. My workshop in the room right next to this is being upgraded with new work tables and storage shelves, so that place was too messy to work with these tape decks. You can see me working on the B67 and Søren working on his Sony TC-378. In the background you can see a Tandberg 3300X which a friend of mine gave to me. It needs a bit of work, but does look cool.
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Here is another picture of the workshop, here I caught Søren working on his Sony. In the background you can see the bank deposit box (the house was once a bank, then a vet, and now a studio, rehearsal space and workshop) that works as the control room for the studio. You can not see it in this picture but my Teac X-2000R is in the control room, and behind Søren is a cute little Tandberg Model 14 with built in speaker, that I got from the same guy that gave me the Tandberg 3300X. Both were given to me the same day I picked up the Studer. What a lucky day!
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Here is a hot babe shot of the Studer. I slapped a couple of Revox reels on it that I think will fit nicely until I can get some reels with the Studer name on them:
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She's sizzling hot:
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We slapped a reel of BASF tape on the machine (I can't remember what kind, maybe LPR-35, or something like that). Then I took some of the recordings I had on the computer, a finished album, though these files were before the album was mastered. We recorded and monitored live and wow! Just wow. The warm sound of tape! :music:
The transformers at both the inputs and outputs, working together with the nice electronics, great butterfly heads and nice tape produced a nice, pleasent and warm sound. I can definitely see myself using this machine to bounce pre-masters and masters. The way the instruments just melted together, the sweetening of the high end and the tightening of the low end just...

The next steps in the proces is to acquire an alignment tape, get the machine adjusted to some hi output tape, I am considering SM911 or LPR-35 since these formulas can be bought new, relatively cheap. This also means that I can keep my old Maxell and TDK tapes for the X-2000R for which they fit perfectly.


Hope you enjoyed reading! I will keep you updated in near future, when further work is done to the machine.
 
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The forum only allowed me to have 15 photos, but I just have two more I MUST show you ;)

And another shot. This is a shot from first time we fired her up after cleaning her.
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And just to finish this first part of the story, I did work on the Soundcraft desk a couple of days ago, where I replaced some blown light bulbs in the VU meters. This has nothing to do with the tape machines, I just thought that you might find this picture sexy. I do, at least :D
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Also a very welcome from the other end of Denmark (well allmost).

Did you turn the guide between the erase head and the record head a quarter turn ? It has a flat spot visible, besides that, it is a good looking deck.

Alignment tapes are really hard to come by here in Denmark - MRL magnetics seems to be just about the only supplier left on this earth ... i can't locate others, and those tapes are expensive. If it can be of any help , i'll record a 2track 15" tape for you on a calibrated PR99, and ship it with the other tapes.
 
Oh... NICE! You have the wooden sides for it as well. That head stack looked like it needed steam cleaning!!!

I have the rare VU meter version, but no side panels.

Replacing the caps was a VERY wise thing to do. One bad cap can take out one of the now rare IC's.... you don't want that.


Oh, have a read of what I went through with mine: http://www.audiokarma.org/forums/showthread.php?t=307142


Marc
 
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Oh... NICE! You have the wooden sides for it as well. That head stack looked like it needed steam cleaning!!!

I have the rare VU meter version, but no side panels.

Replacing the caps was a VERY wise thing to do. One bad cap can take out one of the now rare IC's.... you don't want that.


Oh, have a read of what I went through with mine: http://www.audiokarma.org/forums/showthread.php?t=307142


Marc
I have already read your post yesterday, it's really impressive what you have done to save it. It's quite hard to understand how the hell it got so messed up.
Well, I suspect my machine will last at least a decade from now, if not more. I hope I get to use it a lot for mastering. The next goal would be some kind of multitrack reel tape recorder. That will allow me to make all analog recordings, all the way from tracking to mastering. Not that there is a huge demand for that, but it will sure be a lot of fun.
 
I have already read your post yesterday, it's really impressive what you have done to save it. It's quite hard to understand how the hell it got so messed up.
Well, I suspect my machine will last at least a decade from now, if not more. I hope I get to use it a lot for mastering. The next goal would be some kind of multitrack reel tape recorder. That will allow me to make all analog recordings, all the way from tracking to mastering. Not that there is a huge demand for that, but it will sure be a lot of fun.

Well, if you REALLY want to treat the machine, buy a few new bearings for it and a small bottle of PDP-65 oil. It'll thank you for it.

Marc
 
Well, if you REALLY want to treat the machine, buy a few new bearings for it and a small bottle of PDP-65 oil. It'll thank you for it.

Marc

That is a future project, alongside head relapping and acquiring a remote control unit instead of the DIY-kit one that was included with the machine, though it works fine.
 
Well, if you REALLY want to treat the machine, buy a few new bearings for it and a small bottle of PDP-65 oil. It'll thank you for it.

Marc


And he should get rid of those "Waiting to explode" thingies - shouldn't he ??

..... << looking nervous from side to side . avi >> someone pointing a finger towards me here ?, just because i didn't fid the last one ??? :D:D
 
Guiller - just watched that "Les vacances de Monsieur Hulot" today ........... took me several hours to stop laughing.
 
Welcome to the B67 owners club :thmbsp:

Time to show nudies of mine !

Did a mod to allow adjustment of motors from the from of the machine, à la MkII.

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Oh I would have loved to have that table rack mount you have for yours. And the VU-meters. Mostly for the wow-effect on customers in the studio :smoke:

I have been doing some more recapping to the machine, but there are some cap values that I do not have in stock. Well I do, but they are very old stock, probably just as old as the machine itself, so it will be pointless to put them in. Søren and I will order some caps and other components one of these days, so we can get done with our machines.

I am also going to order this kit off German eBay.http://cgi.ebay.de/ws/eBayISAPI.dll?ViewItem&item=130591842746
None of the lamps are faulty (yet) but it can't hurt to have some in stock. I also thought that it would be a good idea to change the ball bearings. It needs a new pinch roller anyway, and buying this complete kit is a lot cheaper than the sum of the parts. The same company also stocks pinch rollers for my Akai GX220, so that little machine can also gain a new life.
 
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You have to se it twice - second time do not all the funny soundeffects.

( And the incredible funny way he handles a racket when playing tennis..... )
 
Sorry for hijacking this thread!!

Well, I'll just hijack the thread right back.


I have done the first mastering recording to tape on the deck now. I have recorded a song for a local amateur sketch show together with a bandmate. We did all tracking digitally in one single day, then I mixed it through the Soundcraft desk and recorded onto the B67. After it was done, I recorded the result from the B67 back into the DAW (Digital Audio Workstatio, fancy name for computer used for recording audio).
I can see and hear very good use for this tape machine in the studio, as it did color the sound in a very nice, warm and positive way. The analog summing through the desk also did something to warm the sound.
I am currently communicating with a guy who has a Soundcraft 760 16-track two inch recorder up for sale. If I can acquire that one, I can offer a completely analog recording studio.
The demand for analogue recording is increasing again (after a decade with a steady decline). It would be fun to some day make a complete analogue recording, all the way from the tracking to the mastering to vinyl, and I know that some still do that.


Søren and I have ordered the last capacitors we needed to finish recapping our machines. As mentioned before, I will order a service kit off eBay for the B67, complete with pinch roller, rubber belts, light bulbs and ball bearings for the motors. I will of course keep you updated about the machine, and hopefully I will have her up and running as if she was brand new. :banana:
 
Before ordering on the net - it could be wothwhile to contact Villadsen - after all , he did represent Revox/Studer in denmark, and may have parts available (he actually lives quite close to me)
 
welcome to AK, I am just relieved to see another young tape head, you guys look my age, in the USA, there is NO ONE my age who is into this, or at least those who are are few and far between.

its alright though, theres plenty of old tape engineers willing to spill their knowledge to the young guys like me.
 
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