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My Michell Gyro bounce on YouTube. Is it good or bad?

80.202.44.91
Posted on November 1, 2009 at 09:23:08
Balle Clorin
Audiophile

Posts: 644
Joined: July 30, 2003
 I just bought a Mychell Gyro SE. I read a lot of online resources and post in this forum about to get a good bounce.

But I have no experience and find it difficult to judge the quality of the bounce.

So I uploaded a youtube video of my Gyro's bounce..I just leveled the platter and tried to orientate the springs all to point towards the center spindle with the "low end" That is the sloped end on the unloaded spring is nearest to the spindle.

I would be grateful for any comments..Is this a good or bad bounce..??

I use the shadow from the platter projected on the wall to evaluate the bounce. I taped a piece of paper with a vertical line on the wall. Ideally the shadow should move only vertically.
This video is of at the starting point for bounce check. I only leveled the platter and push carefulley down and release. Later in the movie I try to bounce continously, but are concerned that I am not able to push completely vertical. If any Michell owners could the me if my bounce is good or bad? I am new to this.


Best regards
Balle


downloadable file...
http://rapidshare.com/files/301031089/michell_bounce_take1_MVI_0910.AVI
RE: My Michell Gyro bounce on YouTube. Is it good or bad?, posted on November 3, 2009 at 16:04:44
Hopstretch
Audiophile

Posts: 7
Location: Boston
Joined: September 5, 2009
 Looks pretty much what mine looks like. I haven't fussed with it too much. It's level, on a solid foundation, the bounce seems fairly vertical and the sound is good. I'm a sucker for this table -- it's one of those classic designs that manages to be beautifully functional and engagingly garish (more so in the silver/brass finish) at the same time.

I watched the video again, posted on November 1, 2009 at 15:26:56
spyderx
Audiophile

Posts: 410
Location: SoCal
Joined: July 15, 2008
 Sort of hard to tell, and damn this deck looks nice is black. I have the classic silver. But it gets a lot of looks when people come over... anyway...

Based on what I can see in the video it looks like you might be getting a little rotating bounce, which means you need to spin one or a couple or all of the springs a bit and tune that.

It also looks like your spring height is set a little high, remember just a few mm off the top of the felt washer.
This is how I setup mine, posted on November 1, 2009 at 15:22:08
spyderx
Audiophile

Posts: 410
Location: SoCal
Joined: July 15, 2008
 1. Level the Spider only w/o the top chassis (mouse ears!) piece on. If your platform is 100% this should be level. If not, adjust the aluminum feed to make it level

2. Place the top chassis and the platter on. Put on the belt and adjust the motor spacing. If you have the clamp put that on the spindle. Make sure the tonearm wire is FREE and does not inhibit the bounce. I loop mine and secure it to the back leg with a hanging loop. Some others route out the back of the table and secure to the wall or stand.

3. Adjust the height of the springs via the 3 adjusters so that the top chassis is floating about 2-3mm above the felt.

4. The key here is to get the table to bounce straight up and down, as close as possible, with no "rotation" in the bounce. It's not really easy to do. I use a small bullseye bubble to do this, placed on the platter.

What you will need to do is rotate the entire spring assembly on each of the 3 towers. When you do this, you will see, if you look straight down at the assembly, that it shifts the platter alignment. A good starting point is all 3 of the towers "centered" in the hole they are in. But this won't be perfect for bounce.

Now, bounce the table lightly by tapping straight down on the spindle and watch the bubble. If you see it "circling" or rotating then you need to twist the spring assembly on one of the 3 towers. Eventually you'll get the hang of it. Once the bubble stays as close to the center as possible, your bounce is set right.

5. Next, re-level the platter and make sure the gap is about 2-3mm. Level via twisting the metal screw adjusters on the 3 towers.

6. After you do this, recheck the bounce. It should be OK.

7. After a couple days, recheck the bounce and level, adjust if needed.

When it is set right, the bounce will bounce like in your video, but will also bounce straight up and down. Just a light tap straight down on the spindle is all that is needed.


There may be others that have better advice, but this works well for me and the table sounds amazing.

Few questions..., posted on November 3, 2009 at 13:24:49
FrankC
Audiophile

Posts: 992
Location: Silicon Valley
Joined: April 6, 2000
 When testing the bounce, do you have the arm/armboard mounted? Phono cable attached? I would assume that with the arm/armboard attached, the subchassis' weight distribution would be out of balance, thus unable to only bounce vertically.

FrankC

YES!, posted on November 3, 2009 at 13:44:40
spyderx
Audiophile

Posts: 410
Location: SoCal
Joined: July 15, 2008
 The table should be setup as it will run. The Michell is setup / designed so that with the right armboard and arm, the platter is balanced. I think it is 1kg in total. you'll notice the SME boards are thinner/lighter than the rega boards.

So setup the table just like you are going to play an LP, then setup the bounce.

Part2.., posted on November 1, 2009 at 09:59:37
Balle Clorin
Audiophile

Posts: 644
Joined: July 30, 2003
 It may stall during play ,maybe I uploaded with too demanding resolution,,?

Nothing changed from part 1 . Different angles

Best regards
Balle

RE: Part2.., posted on November 1, 2009 at 23:01:36
Werner
Audiophile

Posts: 1830
Joined: September 30, 1999
 Hard to see due to the camera motion, but yes, that bounce
seems to be quite decent.


bring back dynamic range
Many thanks I will leave it as this for now.. nt, posted on November 2, 2009 at 10:34:11
Balle Clorin
Audiophile

Posts: 644
Joined: July 30, 2003
 nt

RE: Part2.., posted on November 1, 2009 at 10:26:22
Cpk
Manufacturer

Posts: 861
Location: Allentown PA
Joined: May 13, 2005
Contributor
  Since: October 5, 2009
 it's hard to tell what’s going on because of the camera movement but what you are shooting for is the table to bounce straight up and down with out any side movement. If you are doing that all the way around you have it set well.

Talking with the US dist. here, his comment was that the bounce didn't matter but that's not what I heard. I ended up tweaking with the springs too much though trying to eek out that last bit of sonic performance. Ended up selling it getting a scoutmaster, to my ears just ok and then an sp10 mkII




"He had a momentary lapse of ego" W.T.
yes i need a camera stand...nt, posted on November 1, 2009 at 10:37:03
Balle Clorin
Audiophile

Posts: 644
Joined: July 30, 2003
 nt

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