by MattTech »
Sun Aug 10, 2008 5:45 pm
troy b wrote:I have a very heavy "portable" RCA unit with the "feather action" tone arm from around 1967. A very attractive, chromed out turntable which unfortunately is missing the clip that holds the cartridge in place. The cartridge just hangs there. I can find replacement cartridges on the net, but have had no luck finding just the "feather" clip. Any ideas??
Thanks,
Troy
Good luck finding the original piece.
The part you're decribing is a friction-fit plastic "pointer" at the tip of the arm designed to "show" where to put the stylus on a certain groove. It also has a small felt pad underneath that rides on the record as part of a "cleaner" to remove dust and retain the cartridge. It's basically an "L" shaped affair.
Your best bet is to fashion a small piece of aluminum into an "L" shape 10mm wide, 15mm high, 2mm thick with the bottom of the "L" holding the cartridge bracket from dropping past it. And gluing a tiny piece of felt on the bottom of the "L"... Bottom of the "L" should be about 5-6mm long to retain the cartridge bracket. You want this to be a semi-tight friction fit, tight enough not to fall out, yet removable in the future. Patience, filing, smoothing and care in shaping is the key.
Since this style arm is designed with a floating cartridge, the whole weight of the arm is heavier against the record, the cartridge assembly floats at about 5 grams pressure. The additional drag from the felt pad is compensated by using a slightly higher rotational speed/bigger motor shaft in these models.
In the other version arm with the round RCA emblem the total arm weight is lighter since the cartridge is fixed with two screws. Also tracking at about 5 grams. And the counterbalance spring is different as is the motor shaft.
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