Servo-Arm Turntables from the '80s

snap, crackle and pop
wolfie62
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Re: Servo-Arm Turntables from the '80s

Post by wolfie62 » 15 May 2018 21:15

No arguments from me! But.....while they work, they work great!

I have yet to see a microprocessor chip go bad. Fortunately, it’s the opamp circuits that tend to go bad, and are replaceable. They carry the current of moving the tonearm.

Just about all your turntables with fine platter speed control DO use the microprocessor/servo circuits, however.

Lots of repair shops will take a “regular” turntable in for work. Few I have found that will look at a servo tonearm deck.

audiopile
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Re: Servo-Arm Turntables from the '80s

Post by audiopile » 15 May 2018 21:23

I think what's being missed is we are talking past each other - in actual use/operation - the servo armed tables are models of ergonomic design. Not having to match cartridges to arms is what first impressed me forty years ago. But automatic - touch the button and it plays - lifts and shuts off at the end - there are evenings when that's what I want (Besides which other than some kind of untreated OCD involving turntables - it's a damm good excuse for having multiple turntables hooked up at any one time .) Because I serviced audio equipment for decades - I expect everything that plays music to fail sooner or later -some predictably and some memorably because of the rarity of the event (Bryston). There are items that I am looking for extreme reliability -hi-fi isn't one of 'em. From my limited personal experience with servo driven arms on tables from JVC and Denon - they are surprisingly reliable if left un-molested -despite all being anywhere from 30-40 years old at this time. We are often faced with compromise when we want convenience - in my experience - that's not the case with servo armed tables -at least if judged for their used prices against what a new table of the same price sells for today. BTW- I am a bit disappointed in all the positive posts about reliability on this thread - we need to keep the complex/don't work thing going or the prices are really going to skyrocket on these things :-).

wolfie62
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Re: Servo-Arm Turntables from the '80s

Post by wolfie62 » 15 May 2018 21:45

As in, “You really don’t want that! PM me and I’ll take it off your hands for $50!”

al2002
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Re: Servo-Arm Turntables from the '80s

Post by al2002 » 17 May 2018 20:48

No worries Wolfie62, I got it the first time.
wolfie62 wrote:But my real point is that while you may find the microprocessor chips, they are worthless without the programming. Who has copies of the programs, with updates? Who has the equipment necessary to load the proper programming into them?

That’s why I’m working on a an arduino chipset program for them.

See, the opamps have to know when and how much signal to send to the servo coil motors. The micro processor is what tells them when, and how much.

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Re: Servo-Arm Turntables from the '80s

Post by al2002 » 17 May 2018 20:53

Spinner45 wrote:
And all that complexity involved should something fail?
You can have it.
I like things simple and fuss-free.
I was going to suggest a gramophone with a clockwork motor and a tone arm fitted with cactus needles, but then I realised that a clockwork motor is far from simple....... :D

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Re: Servo-Arm Turntables from the '80s

Post by al2002 » 17 May 2018 20:56

Yes indeed! I have an original SL-1300. 40+ years old and still working well. Non-audiophiles find auto turntables far easier to use than manual tables.
audiopile wrote:I think what's being missed is we are talking past each other - in actual use/operation - the servo armed tables are models of ergonomic design. Not having to match cartridges to arms is what first impressed me forty years ago. But automatic - touch the button and it plays - lifts and shuts off at the end - there are evenings when that's what I want (Besides which other than some kind of untreated OCD involving turntables - it's a damm good excuse for having multiple turntables hooked up at any one time .) Because I serviced audio equipment for decades - I expect everything that plays music to fail sooner or later -some predictably and some memorably because of the rarity of the event (Bryston). There are items that I am looking for extreme reliability -hi-fi isn't one of 'em. From my limited personal experience with servo driven arms on tables from JVC and Denon - they are surprisingly reliable if left un-molested -despite all being anywhere from 30-40 years old at this time. We are often faced with compromise when we want convenience - in my experience - that's not the case with servo armed tables -at least if judged for their used prices against what a new table of the same price sells for today. BTW- I am a bit disappointed in all the positive posts about reliability on this thread - we need to keep the complex/don't work thing going or the prices are really going to skyrocket on these things :-).

AlwaysAirborne
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Re: Servo-Arm Turntables from the '80s

Post by AlwaysAirborne » 18 May 2018 01:20

al2002 wrote:Yes indeed! I have an original SL-1300. 40+ years old and still working well. Non-audiophiles find auto turntables far easier to use than manual tables.
So do a few of us reformed audiophiles. :D

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Re: Servo-Arm Turntables from the '80s

Post by wolfie62 » 18 May 2018 03:48

Refined audiophiles are also smart enough to know that full auto turntables sound just as good as manual tables!
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abs1
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Re: Servo-Arm Turntables from the '80s

Post by abs1 » 18 May 2018 16:08

wolfie62 wrote:Refined audiophiles are also smart enough to know that full auto turntables sound just as good as manual tables!
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If you say so :lol:

Cheers,
Al

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Re: Servo-Arm Turntables from the '80s

Post by wolfie62 » 18 May 2018 18:54

That was directed toward al2002.....

I’m not OCD about manuals or autos, actually.

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Re: Servo-Arm Turntables from the '80s

Post by Spinner45 » 18 May 2018 19:05

wolfie62 wrote:That was directed toward al2002.....

I’m not OCD about manuals or autos, actually.
Nice lookin' 1350 there.
I always had a "want" for a 1650, in black.

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Re: Servo-Arm Turntables from the '80s

Post by al2002 » 22 May 2018 21:18

Not that I care, but why on Earth would you direct it at me? This matter has nothing to do with any comments I've posted.
wolfie62 wrote:That was directed toward al2002.....

I’m not OCD about manuals or autos, actually.

wolfie62
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Re: Servo-Arm Turntables from the '80s

Post by wolfie62 » 22 May 2018 21:41

al2002 wrote:Yes indeed! I have an original SL-1300. 40+ years old and still working well. Non-audiophiles find auto turntables far easier to use than manual tables.

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Re: Servo-Arm Turntables from the '80s

Post by al2002 » 22 May 2018 22:35

Wolfie62, you've just made my point.

Your Statement: "Refined audiophiles are also smart enough to know that full auto turntables sound just as good as manual tables!"

My Statement:"... Non-audiophiles find auto turntables far easier to use than manual tables."

In what way does my post support/oppose yours? We are talking about two entirely different aspects of auto tables.

wolfie62
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Re: Servo-Arm Turntables from the '80s

Post by wolfie62 » 23 May 2018 03:21

I’m sorry, but your comment is totally asinine!

Years ago, 38 to be precise, I enjoyed music but was not an audiophile. I had a manual turntable. Years later, I am most definitely an audiophile! I have nothing BUT full auto turntables! Why? Because I can make mistakes! I prefer to keep my hands off the record, and I keep the cover closed to keep off dust, and I prefer to keep my stylus in great shape, no accidental hard drops, or side swipes on the record edge! A good auto TT does all that! I load the record, clean off the dust, close the cover, and touch the down cue button. At end of play, I turn the record over or place it in its sleeve. No mistakes!

You are implying that audiophiles, I guess “true” audiophiles, only use manual TTs and that auto tables are for those “ not well acquainted with the audiophile way.”

Totally asinine!!