@toprepairman
here you can find some fotos Revox G36 - Page 3 - Tapeheads Tape, Audio and Music Forums
and a description how to overhaul the capstan motor. ( I think you must first register to see the fotos).
@volken:
I saw your fotos in the other thread here.
http://www.diyaudio.com/forums/anal...x-g36-mkiii-expert-opinions-solicited-18.html
What a lovely and professional art of work!
Do want to use your G36 as a machine for mastering?
I´m waiting for the next parts. Please work on with your foto documentation!
Would you like to explain, how you calibrate your G36 (VU adjustment and bias) for modern tape ( I use BASF DPR 26 btw)?
That would be very kind. Heelemal bedankt.
Greetings Jürgen
here you can find some fotos Revox G36 - Page 3 - Tapeheads Tape, Audio and Music Forums
and a description how to overhaul the capstan motor. ( I think you must first register to see the fotos).
@volken:
I saw your fotos in the other thread here.
http://www.diyaudio.com/forums/anal...x-g36-mkiii-expert-opinions-solicited-18.html
What a lovely and professional art of work!
Do want to use your G36 as a machine for mastering?
I´m waiting for the next parts. Please work on with your foto documentation!
Would you like to explain, how you calibrate your G36 (VU adjustment and bias) for modern tape ( I use BASF DPR 26 btw)?
That would be very kind. Heelemal bedankt.
Greetings Jürgen
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Hi elektroj,
do you want to convert a g36 to HS? I found an very interesting thread:
More Revox mods
Revox did it two ways.
1. speed of the capstan motor + 50 % and 1/3 thicker capstan shaft
"For the first series, the factory substituted a motor with 8 + 4 pole windings (to get the two speeds) for the normal 12 + 6 pole motor. That gave them 50% higher motor speed:
12 + 6 pole motor, 50Hz: 500 + 1000rpm, 60Hz: 600 + 1200rpm.
8 + 4 pole motor, 50Hz: 750 + 1500rpm, 60Hz: 900 + 1800rpm."
2. double thickness of the capstan shaft and a new position of the whole capstan motor, to make sure the tape is running right around the play head.
"For the second batch of 7-1/2 + 15ips G36's, Revox switched back to using the same 12 + 6 pole motor as for the 3-3/4 + 7 1/2ips version. To get the speed increase they fitted a double diameter (+ 100%) capstan shaft. Obviously there were again two versions of this shaft, one for 50Hz and one for 60Hz. But the 100% increase in capstan shaft diameter meant that they had to modify the chassis and the base casting to shift the motor a bit towards the VU meters to compensate; this chassis and casting had different part numbers of course."
So which capstan shaft for high speed are you looking for?
Good luck!
do you want to convert a g36 to HS? I found an very interesting thread:
More Revox mods
Revox did it two ways.
1. speed of the capstan motor + 50 % and 1/3 thicker capstan shaft
"For the first series, the factory substituted a motor with 8 + 4 pole windings (to get the two speeds) for the normal 12 + 6 pole motor. That gave them 50% higher motor speed:
12 + 6 pole motor, 50Hz: 500 + 1000rpm, 60Hz: 600 + 1200rpm.
8 + 4 pole motor, 50Hz: 750 + 1500rpm, 60Hz: 900 + 1800rpm."
2. double thickness of the capstan shaft and a new position of the whole capstan motor, to make sure the tape is running right around the play head.
"For the second batch of 7-1/2 + 15ips G36's, Revox switched back to using the same 12 + 6 pole motor as for the 3-3/4 + 7 1/2ips version. To get the speed increase they fitted a double diameter (+ 100%) capstan shaft. Obviously there were again two versions of this shaft, one for 50Hz and one for 60Hz. But the 100% increase in capstan shaft diameter meant that they had to modify the chassis and the base casting to shift the motor a bit towards the VU meters to compensate; this chassis and casting had different part numbers of course."
So which capstan shaft for high speed are you looking for?
Good luck!
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Hello Jurgen
On the moment I'm to busy with turntable revision work but as soon as I got time I post more pictures and info about this project.
Regards
Volken
Jürgen, that's a double dutch
Kidding aside, can anyone of you, guys, tell me the diameter of G36 HS and 'normal' 50 Hz capstan shafts?
Thanks!
The diameter from the HS capstan is 7.251mm.
Thanks, volken! I assume the diameter is 2x the 'regular' shaft from the 6/12 pole motor. The thicker parts of the shaft (sintered bearings) are 8mm, right?
Best,
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