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If you order an armboard...

Posted by tketcham (A) on December 9, 2016 at 07:19:17

In Reply to: RE: Gyrodec SE vs. EAT C Major... posted by Marc Bratton on December 8, 2016 at 06:46:08:

Hi, Marc,
I really enjoy my Gyro SE. It was a stretch for budget but I don't regret the investment. The Moerch UP4 was one of three tonearms I was considering, ending up with a SME 309.

As for the armboard (it's more like a mounting plate), make sure that you know how much the UP4 weighs so you can order the correct tonearm mounting plate. I found that it's very important to have the chassis evenly balanced to get the "Gyro bounce".

The correct weight of the tonearm and mounting plate (and hardware) is supposedly 1000g but I had problems with the stock SME 309 mounting plate supplied by Michell Engineering. It weighed about 135g too much so I had to replace it with an acrylic plate weighing 105g; total weight = 720g (tonearm) + 55g (hardware/DIN connector) + 105g (plate) = 880g. Michell Engineering didn't know why there was such a discrepancy but I wasn't the only one that had problems with getting the chassis balanced using the stock mounting plate.

I suggest you consult with Artech Electronics to make sure you end up with the correct plate and that they'll stand behind the plate they send you. You could ask here at the vinyl asylum to see what other UP4/Gyro SE users have to say. Maybe even get a measured weight of the plate they're using.

I also recommend that you get the Orbe Clamp upgrade kit. Having a threaded clamp on a suspended chassis is important in order to get the right clamping tension on the LP. With the stock clamp it requires you to exert a fair amount of down force and it just didn't seem like a good thing for the suspension in the long run.

Regards,
Tom

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