Installing cartr.:slide it all the way to front?

Overhang,

AHA! Progress.

It appears your Gyro was used with some arm that needed a shorter mounting distance than a Rega. Fortunately, the Gyro's armboad is adjustable. I don't know the details but there are one or more screws you loosen, after which the mounting plate spins. You'll note the arm mounting hole is offset, so spinning the mounting plate changes the arm's distance from the spindle.

Try to make your spindle-pivot dimension 219-220mm. That's the optimum for a Rega to achieve 2-point Baerwald alignment, which is widely considered the best scheme.

If you can do that, visit www.TurnTableBasics.com and buy their $20 mirrored alignment protractor. The TTB is probably the most accurate protractor short of a $150 WallyTractor. You'll be all set.

Doug

P.S. Don't bother trying to align a cartridge using your Rega protractor with the arm at 216-218mm. It won't be possible. That protractor assumes 223mm. If you don't want to buy the TTB protractor and just want to use the Rega one, you'll have to swivel the arm's pivot point all the way out to 223mm.

DougDeacon,

A way one might keep optimal Rega mount distance and align ala Baerwald may be to relegate any protractor that constrains to the dustbin. I suspect that the one size fits all approach to some protractors that are not arm specific might have their own proximation pitfalls built in.
The two null points for Regas are 60mm and 115mm from center spindle. With some oak tag and a compass, couldn’t you just make up your own? Using a little plane geometry, you can even come up with “squaring off” alignment boxes. Just a thought in the direction that I’d consider before changing the arm’s throw.

"There's no obvious visual spot at the pivot point on an RB600 so here's what I do: stick a small piece of Scotch tape on top of the arm tube, above the pivot point you just identified. Mark a dot above the pivot point with a pen. Swing the arm a couple of times to confirm the dot isn't moving. If the dot moves, change the position of the tape and try again. When the dot remains stationary you've marked the pivot point. Voila!"

Doug, Many thanks for this suggestion. Very much appreciated.

Thanks Doug.My distance is 216-218 mm.

Plinko,

Glad that was helpful. Trying to measure/adjust the pivot point when you can't even see it is too tough for me!

Mario b,

IME Baerwald alignment cannot be attained with a Shelter cartridge on a Rega mounted at the standard 222mm. The stylus will not reach the null points. This is true of many cartridges, as explained on the instructions that come with most Rega/Baerwald protractors.

This is not a "flaw" of Baerwald protractors. It's a mathematical function that results from choosing a different alignment than the arm was designed for.

BTW, 60mm and 115mm are not the Baerwald-defined null points. You can use those points if you like, but you won't be following Baerwald's equations. The Baerwald null points are 66.0 and 120.9mm.

There is no reason to be nervous about changing your arm's mounting distance, especially on a table like Overhang's Gyro that's specifically designed for it. Deviating from Rega's specified 222mm to achieve a superior alignment has no down-side and no risk. Why would you be reluctant to do that?

One can certainly DIY one's own protractors of course, using any null point or null points one chooses. But a mirrored protractor like the TTB or Wally is more accurate for cantilever alignment than a piece of oak tag.