Gyrodec

[AussieCarl]

Hi everyone,

Newbie here. Bought a Michell Gyrodec with Rega RB300 arm and Audio Technica AT33 PTG II cartridge many years ago but never got it properly set up. Timber floor was too bouncy. I am building a new lounge and I'm making sure the floor is over designed and won't move. Based on this I'm just wondering what model of Gyrodec I have and how I can change speed from 33 to 45. Also whether it has an AC or DC motor and what upgrades I should consider. I know these are basic questions...

Cheers,

Carl

[joem60]

Hi Carl to change speed just move the belt from one groove on the motor pully to another (small dia 33 large dia 45). your motor looks like an ac one. plenty of info about upgrades and setup on here, all I've done is replaced motor with dc one,(a bit expensive at current prices) changed original main bearing which you have for newer inverted one with threaded top to use better threaded clamp and fitted new suspension parts.

[AussieCarl]

Thanks for the details joem60, I look forward to exploring the possible upgrades on here. Any hints and tips for where to go and what to do would be gratefully received. eg where did you get the main bearing upgrade and the do motor. Were they noticeable upgrades?
Cheers,
Carl

[joem60]

The bearing, suspension and dc motor upgrades are all available from any Michell dealer, most people seem to think the inverted bearing and two part suspension worth having, if your motor is fitted to the base of your Gyro in order to change to DC you would need a new base to fit the dc motor in it's separate housing, it's not cheap and not everyone thinks it's an improvement. If I were you I would just change the oil in the main bearing maybe fit a new belt and enjoy as it is for a while before spending any money on it.

[Werner]

AC for sure.

It is hard to see, but I think you have the inverted bearing.

I would not add any upgrades, just set it up properly and then see if everything is as it should be.

Detailed instructions and info on what is (was) available as options here:

http://www.geocities.ws/michell_gyrodec/

[AussieCarl]

Thanks Werner,

That's a very complete article on maintenance and potential upgrades!

I have attached a couple of photos of the bearing under the platter. Is this an inverted bearing?

Cheers,

Carl

[gwernaffield]

HI just follow the instruction on the link Werner has sent ,, the best way is to put the gyro together ,, have a good couple of months listening to the gyro , to the Michell standards ,,
if you decide to go down the upgrade route , then look at doing some of the upgrades,, i think yours may have the old type suspension with the solid posts,, (unless changed)
they are imperial ,, do not need the bearings i use ,but the nut would be a special set of imperial ones,,
i have not done the gorbe as i do not think it makes much difference,,over the cost spent ,,
the size of the bearing ball is 7/32 ,, and not 1/4 ,,

all the best
pete

[joem60]

Thanks Werner,

That's a very complete article on maintenance and potential upgrades!

I have attached a couple of photos of the bearing under the platter. Is this an inverted bearing?

Cheers,

Carl

My mistake that is the inverted bearing. Make sure you don't loose the steel ball when you lift the bearing housing off the shaft, normally it stays in the housing.

[gwernaffield]

the bearing is 7/32 and can be easy replaced, but a pain if you cannot find were it went when it dropped on the floor ,and have not got one
7/32 alumin oxide , ceramic , or michell with happily send you one,

[Tarzan]

How did you get on with the Gyrodec Carl? [-o<