Jelco SA-250st Tonearm

JELCO SA-250 ST Black 9" Tonearm w/ Heavy+ Light Counterweights.

I’m the original owner. Tonearm has around 30 hours. Comes with the original packaging. No issues at all. Great condition. Comes with extra Heavier counterweight ($70).

Effective Mass is stated at 10.44g. This is a medium-mass arm and should work well with the majority of phono cartridges.
Using the standard counterweight and no cartridge effective mass is 10.44g; with a cartridge EM becomes 18.67g.

With the heavier counterweight and no cartridge effective mass is 10.23g; with a cartridge EM becomes 18.04g. As this arm comes with the additional heavier balance weight you have very fine control of cartridge response.

Specifications:

Type = Strait Pipe static-balance tonearm with built-in head shell for suppression of resonance

Effective Length = 228mm

Pivot-to-spindle distance = 210mm

Overhang = 18mm

Offset Angle = 23.75 degrees

Tracking Error = +2, -1%

Effective Mass = 10.44g

Horizontal Sensitivity (first action w/ inner wire free) = 20mg

Vertical Sensitivity (first action w/ inner wire free) = 20mg

Cartridge weight range with standard counter weight = 4-10g

Cartridge weight range with heavier counter weight = 9-17g

Mounting Hole Required = 18mm for arm by itself or 30mm if included Base Unit is used

Range of height adjustment (distance between bottom of arm base and arm-pipe center) = 38-60mm