Studer B67 faults initial inspection. - Page 2 - UK Vintage Radio Repair and Restoration Discussion Forum

John Caswell · 18th May 2017, 5:41 pm

Hi Nick,
Yes it is probably worth it, have a look on German eBay and also Nagravox in sunny Oz.

John

Nickuk99 · 22nd May 2017, 7:51 am

Thanks,

By the way.. The tension arm is fine now.. The knurled lock nut had worked it's way completely off and the spring was not returning the arm to a point where the micro switch was being activated.. now it is fine..

Please does anybody know how to open the VU meters to change the bulbs?? Is it really a case of wiggling them off??

Ted Kendall · 22nd May 2017, 10:39 am

I fear so...either be very careful or live with dim VUs...and try lubricating the capstan motor before you go for new bearings.

jamesperrett · 22nd May 2017, 12:49 pm

Quote:

Originally Posted by Nickuk99

I am talking about the capstan motor when running without the pinch roller being engaged... It is not noisy but it can be heard.

My Revox B77 has always made a very slight whining noise from new but it is only really audible in a very quiet room.

TIMTAPE · 22nd May 2017, 2:33 pm

Yes I think it's related to the inductive pickup attached to the capstan motor. I'd call it a whistle. I think on later models they mounted the pickup more flexibly to reduce the whistle's intensity.
I doubt it's motor bearing noise which would probably have a rougher, less musical sound. Even so, as Ted says, important to oil the front plain bearing.

Welsh Anorak · 24th May 2017, 5:51 pm

I think that whistle is part of the Revox charm!

Nickuk99 · 27th May 2017, 10:38 am

Okay.. I'll oil the capstan bearing.. The noise is not really audible.. but in a totally silent room you can hear the machine is 'on' .. at the two lower speeds it is all but silent. .

Nickuk99 · 27th May 2017, 10:42 am

On another note.. I managed to gently remove one of the covers off one of the VU meters..

Can't see the bulb! !!

Is the bulb behind the opaque plastic scale??.. If so I think I have to dismantle the VU panel from behind. .which is quite a bit of work as the VU meters are mounted beneath the PCBs...

Nickuk99 · 27th May 2017, 10:47 am

Here are a few pics

Michael Maurice · 27th May 2017, 9:43 pm

It is very unlikely that Studer would have fitted a VU meter where you have to take the front off to change a bulb!

18th May 2017, 5:41 pm	#21
John Caswell Hexode Join Date: Jul 2009 Location: Wokingham, Berkshire, UK. Posts: 437	Re: B67 faults initial inspection Hi Nick, Yes it is probably worth it, have a look on German eBay and also Nagravox in sunny Oz. John

22nd May 2017, 7:51 am	#22
Nickuk99 Triode Join Date: Mar 2017 Location: Reading, Berks, UK. Posts: 23	Re: Studer B67 faults initial inspection. Thanks, By the way.. The tension arm is fine now.. The knurled lock nut had worked it's way completely off and the spring was not returning the arm to a point where the micro switch was being activated.. now it is fine.. Please does anybody know how to open the VU meters to change the bulbs?? Is it really a case of wiggling them off??

22nd May 2017, 10:39 am	#23
Ted Kendall Dekatron Join Date: Jul 2008 Location: Kington, Herefordshire, UK. Posts: 3,670	Re: Studer B67 faults initial inspection. I fear so...either be very careful or live with dim VUs...and try lubricating the capstan motor before you go for new bearings.

22nd May 2017, 2:33 pm	#25
TIMTAPE Octode Join Date: Jul 2006 Location: Perth, Western Australia Posts: 1,969	Re: Studer B67 faults initial inspection. Yes I think it's related to the inductive pickup attached to the capstan motor. I'd call it a whistle. I think on later models they mounted the pickup more flexibly to reduce the whistle's intensity. I doubt it's motor bearing noise which would probably have a rougher, less musical sound. Even so, as Ted says, important to oil the front plain bearing.

24th May 2017, 5:51 pm	#26
Welsh Anorak Dekatron Join Date: Apr 2005 Location: North Wales, UK. Posts: 6,918	Re: Studer B67 faults initial inspection. I think that whistle is part of the Revox charm!

27th May 2017, 10:38 am	#27
Nickuk99 Triode Join Date: Mar 2017 Location: Reading, Berks, UK. Posts: 23	Re: Studer B67 faults initial inspection. Okay.. I'll oil the capstan bearing.. The noise is not really audible.. but in a totally silent room you can hear the machine is 'on' .. at the two lower speeds it is all but silent. .

27th May 2017, 10:42 am	#28
Nickuk99 Triode Join Date: Mar 2017 Location: Reading, Berks, UK. Posts: 23	Re: Studer B67 faults initial inspection. On another note.. I managed to gently remove one of the covers off one of the VU meters.. Can't see the bulb! !! Is the bulb behind the opaque plastic scale??.. If so I think I have to dismantle the VU panel from behind. .which is quite a bit of work as the VU meters are mounted beneath the PCBs... Last edited by Nickuk99; 27th May 2017 at 11:06 am.

27th May 2017, 10:47 am	#29
Nickuk99 Triode Join Date: Mar 2017 Location: Reading, Berks, UK. Posts: 23	Re: Studer B67 faults initial inspection. Here are a few pics Attached Thumbnails Last edited by Nickuk99; 27th May 2017 at 11:06 am.

27th May 2017, 9:43 pm	#30
Michael Maurice Moderator Join Date: Feb 2006 Location: Wembley, Middlesex Posts: 7,223	Re: Studer B67 faults initial inspection. It is very unlikely that Studer would have fitted a VU meter where you have to take the front off to change a bulb! __________________ Forum Moderator http://www.michaelmauricerepairs.co.uk/