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Audio and Video Talk
Vinyl
INFO wanted: SABC Mark3 TT
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<blockquote data-quote="Steerpike" data-source="post: 53933" data-attributes="member: 807"><p>I thought up more questions!</p><p></p><p>That rotary knob to initiate play - is it a conventional two position rotary switch, or momentary action, or more than two- position?</p><p></p><p>And the circular 'buttons' - are all 5 of them push-switches, or are some only pilot lights?</p><p></p><p>I managed to get some Rafi Lumotast lenses that are almost idential to those ones, so I can fabricate them into pilot lights or switches as needed.</p><p></p><p>The motor (looks like a hysteriesis synchronous type) seems small for such a heavy duty drive - small in that hysteresis motors produce tiny torque for their physical size. I was told by a former service engineer that these turntables originally used Bogen motors, as supplied to Ampex. I wonder if that Papst was a new design improvement, or a 'make do' when the Ampex motors became unavailable.</p></blockquote><p></p>
[QUOTE="Steerpike, post: 53933, member: 807"] I thought up more questions! That rotary knob to initiate play - is it a conventional two position rotary switch, or momentary action, or more than two- position? And the circular 'buttons' - are all 5 of them push-switches, or are some only pilot lights? I managed to get some Rafi Lumotast lenses that are almost idential to those ones, so I can fabricate them into pilot lights or switches as needed. The motor (looks like a hysteriesis synchronous type) seems small for such a heavy duty drive - small in that hysteresis motors produce tiny torque for their physical size. I was told by a former service engineer that these turntables originally used Bogen motors, as supplied to Ampex. I wonder if that Papst was a new design improvement, or a 'make do' when the Ampex motors became unavailable. [/QUOTE]
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Audio and Video Talk
Vinyl
INFO wanted: SABC Mark3 TT
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