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Knob turning

The Fine large knobs have a diameter of 1 15/16ths inches while the Coarse knobs are 2 1/16th Inches.

Both my units with Fine knobs are exactly the same G 8000 and G 9000DB

Both my G 9000 units have the larger Coarse knobs and are exactly the same.

Tom, please post the first five numbers of each unit because I am thinking the knobs changed somewhere between June of 1978 and Dec. 1978.
Your numbers might help to give a more definitive answer.

Thanks.

Gary
 
Thoughts & A Freebie....

Oh great, Tom, LOL. All of this, and now you have to go and bring up WOMEN!?!?!? Does this suggest that a coarse woman can be fine? Or that, conversely, a fine woman can be coarse? Maybe both.... Perhaps it depends on their coresponding radius (taper?). Or would that be radi-i, in the plural context? And then there's always the size of their knobs to deal with. And that begs the question, can you turn a woman on a lathe? I'd tend to think you'd be better off going with a drill press. But then again, I guess it depends on how big your press is. Table? Floor? Thus explains the origin of the phrase "Size Does Matter"
Oh well, never mind the fact that I obviously need sleep. I have a set of knobs off of a G-4700 that anybody can have for the asking. I also have everything else off of a pristine G-4700 that anybody can have for the asking. Cep what didn't survive a 5' acetylene bottle falling on it. Just don't ask how that happened, I'd have to make up some big 'ol lie. Yes, I'm depressed. I've been listening to Up On Cripple Creek for 2 hours non-stop, and I think, along with the medication, that I may come out of it.
 
Ahh, I have to ask, did you learn all the words to that song yet.

I will post those numbers when I get time. In the morning after I hunt a little tail, White Tail that is. Snow on the ground and thats a good thing. I am going to bed.
 
Just to further muddy the waters for you all...

Common maufacturing practices of nearly all Japanise industries, but particularly with the larger companies, is to job the same part out to many small job shops, and only tightly spec the critical dimensions. The others are left loose to encorage inexpensive bids.

There is only 2 really critical dimensions on a knob. The shaft/splines and the functional depth of the shaft/spline hole to the backside.

Knurling, V cuts, OD (within a loose tolerance) finish, bevels, etc could all be left pretty loose as long as the knobs are made and sold as batch "sets" (Not matched sets, but batched within a lot so associated knobs are similar in appearance) That would be consumed at a given rate. 1 for 4 or whatever the ratio is to small knobs to big ones...)

I strongly suspect you are seeing differences in different vendors productions depending on ability to meet cost, delivery etc. to Sansui, who is primaraly a transformer company that expanded into stereo's. It's likely they focused on design and integration of as many off the shelf/speced parts as possible,and then final assembly of the units.

Sorry guy's you may never pin this down to a date before or after...
 
Yes Outlaw, I am confident you are correct! The goal here is to try to pin down as near as possible when the change took place.
I am pretty sure any G 8000 or G 9000 made up to June 1978 had the Coarse style.
For future refrence we should change terminology to Large or Small since Hillman has pointed out the size difference. Large Knobs are 2 1/16" while Small ones are 1 15/16". The big knobs only!
When members are searching for specific knobs it will be good to pinpoint the change date so they know which to search for. I have one unit with some of each and the difference is very noticeable.
With the 8000 & 9000 units they all use a set screw on a smoth shaft while the 4700-9700 apparently use a splined shaft and no set screw.
So far only the 8000 & 9000 units appear to have the volume stop and I am not yet sure if there is a difference in this device dependent on which knob size the unit has.
I have no information yet regarding the G 22K or G 33K as to the knobs used or if they might interchange with the G 8000 & G 9000.
I have also only identified two variations. Looks like all large are the same and all smalls are the same but it won't surprise me to find other slight variations. The Large knobs have a much wider edge bevel on the face and also a much deeper & more pronounced V knotch on the volume knob.
I need to locate units made after June 1978 and before Dec 1978 and determine which knobs they have to get a closer approxamation on this change.
For any one interested, the serial number has the date code in the first 5 digits.
digits 1 & 2 are the line they were made on, digit 3.4 & 5 are the date code.
81806 would be made on line 81 in 1978, June, 81807 is the same line and year but made in 07-July!


Gary
 
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Hey Gary, I see you didn't get your ass out of bed to go deer hunting this morning either, lol. :uzi:
 
Got out of bed! Just have no courage to get out the door in 16 degrees and blowing wind.
Venison is great but not that great! LOL
Besides, I am having more fun playing with Knobs!!!! :thmbsp:

Gary
 
Talk dirty to me baby, I am playing with knobs on the floor. Have them all laid out. Major turn on. Problem is I left my camera at the office.

You guys don't know this; Gary and I have a lot in common. We both spent time in prison :yikes: and we like big G's.
 
You guys don't know this; Gary and I have a lot in common. We both spent time in prison and we like big G's.
Click to expand...

Yea but I got to go home at night and now they pay me to stay home. :banana2:

Gary
 
Hey, you didn't have to tell them that. I will start getting paid in 11 years. Really guys, we both worked in the prison system.

Here is my knob collection, found a little digital that my nephew left, crappy pics, lol.

The first picture is of 4 sets of knobs, da. Top left is from a G-5700, Top right is from a G-7000, Bottom left is from a G-9000DB and Bottom right is from a G-9000.

Picture 2 is from the G-9000DB, Picture 3 is from the G-8000/9000's I have. Picture 4 is like picture with the tricky gold format. Don't have a clue why they came out that way. :) Happy Thanksgiving
 
Guess I have confused everyone.

Small and large knob faces- NOTE the Knotch size and beveled edge thickness!
KnobsFace.jpg


This is the Small or Fine Knob and measures 1 15/16th inches accross!

KnobSmall.jpg


This is the LARGE Knob and measures 2 1/16th inches accross!

KnobLG.jpg


Here are both back to back or bottom to bottom--- Same size!

KnobSide.jpg


These are all G 8000, 9000 or 9000DB.

The small knobs are from units Late 1978-1979
The large Knobs are from units early 1978.

Gary
 
For those who might like to try to machine one, here is what the back looks like. Think they should be quite easy to chuck and spin.

KnobBack.jpg


Gary
 
OK, this is how the numbers run;

G-8000 Serial # 818030823 Large Knobs (Parts Unit)

G-8000 Serial # 818120442 Small Knobs (Living Room Unit)

G-9000 Serial # 818010173 Large Knobs (Working Unit)

G-9000DB Serial # 818100636 Small Knobs (Working On, Sounds Great)

Gary, I think you are on to something here. Funny, I never checked the one in the living room, I just assumed it had larger knobs.

Paul, I don't think you have any of these serial numbers.
 
Hillman said:
OK, this is how the numbers run;

G-8000 Serial # 818030823 Large Knobs (Parts Unit)

G-8000 Serial # 818120442 Small Knobs (Living Room Unit)

G-9000 Serial # 818010173 Large Knobs (Working Unit)

G-9000DB Serial # 818100636 Small Knobs (Working On, Sounds Great)

Gary, I think you are on to something here. Funny, I never checked the one in the living room, I just assumed it had larger knobs.

Paul, I don't think you have any of these serial numbers.
Click to expand...

Thanks, Tom. That was a useful exercise if for no other reason that to add these 4 beauties to the database! :banana2:

Paul
 
Great Tom, Know we have it narrowed to between June 1978 and October 1978 when the switch took place.
Still need info on units from July, Aug, and Sept of 1978 to get it right!
If any one has serial numbers that begin with 81807, 81808 or 81809 then please let us know which knobs you have.
The 81 could also be other line numbers as Paul has pointed out such as 85 but the third, fourth and fifth digits tell the date of manufacture.

Gary
 
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