The newly engineered GEM High Definition platter is the result of four years of engineering.

Energy Management

The HD platter system utilized material to material decoupling to effectively isolate noise from the drive systems and bearing to the record interface.

The platter begins life with a 12 x 12 x 1.25 slab of aircraft grade aluminum and 8 individual components that are brought together and machined as a single unit providing " ZERO " platter runout and "ZERO " out of round, and ZERO out of balance.

This is achieved buy individually machining the components, the main platter, the drive rim, the alloy discs and the acetyl layers.

Using high pressure heat activated laminate the components are then high pressure pressed together in a custom machined assembly fixtures.

This provides a true decoupling - there is no metal to metal contact, the laminate is .001 thick compliant material. Once we complete the assembly the final machining is completed. 

Our proprietary assembly and final machining techniques make for the worlds MOST ACCURATE" platter, and yes we can prove it. The platter is machined to the highest end of Aerospace tolerances that are seen when we machine jet engine rings and components. The same care, quality and craftsmanship is instilled in our design and machining processes.

Using in house tooling designed fro aircraft rings and components we are able to machine all the features simultaneously - specifically the outer rim and the bearing bore, .0001 maximum runout after machining.

High Mass Platter (31-32 Lbs)

Application notes: The thick platter requires the VTA pod for adjustment to the height of the arm to match the new Platter.

May be used on ALL GEM turntables please inquire larryd@ljtmfg.com

Dimension

Rim Diameter 13.52 inches

Secondary diameter is 11.75 inches

Weight (with Center Weight and Mega Ring standard set up) 35-35 Lbs

Thickness is 2.1 inches

Third diameter tapered machining to reduce standing waves 11.45 inches with ULTIMAT as record mat:

Fits all outer rings

Level One: Drive RIM: Rim Drive interface 13.52 diameter acetyl donut that wraps around the base platter for rim drive noise reduction and isolation true machined to bore 

Level Two: Base Platter has the base 1.25 thick aluminum base

Level Three Compliant decoupling from upper platter 1/8 Thick Acetyl

Level Four to Six Upper Alloy 4 piece platter section: 4 x 1/8 magnesium Alloy

Level Seven is a the record interface compliant decoupling from lower 1/8 Thick Acetyl

Level Eight is the record base interface 1/8 Stainless Alloy

Level Nine is the record Interface of high grade fine woven high energy managing carbon fibre finished with a .005 layer of soft epoxy Gel Coat for safe use of records

Carbon Fibre Record Interface