Yes,in other peices of equipment--factory adjustments-never fiddle about with them.Besides not making the device work-could damage the device.I forgot about the Dual DD TT's until now.Usually the factory puts the varnish--"nail polish" on these controls to alleviate fiddling by curious folks.
stereo turntables in DD use.
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whirlcool
Well-known member
I researched the adjustments down the best I could. I got a letter from a guy in Germany who said he knew someone that worked at Dual during that time and the best he could say is that they used "special" equipment to measure the setup process. That's the closest I could come to figuring out how it was done.
I have spoken with the best in the Dual repair industry. Not a one knows how to adjust the hall effect coils back to their specification.
Also a cracked solder joint in the speed control near a transistor can speed the platter up to 2,000 rpms! I have heard of this problem 4 times in the 14 years I have been involved with Dual audio equipment. It's a real rare problem. Just tapping the joints with a dental pick will determine which joint it is that needs resoldering. And should one ever decide to rebuild the speed control board, all components are still available.
I have spoken with the best in the Dual repair industry. Not a one knows how to adjust the hall effect coils back to their specification.
Also a cracked solder joint in the speed control near a transistor can speed the platter up to 2,000 rpms! I have heard of this problem 4 times in the 14 years I have been involved with Dual audio equipment. It's a real rare problem. Just tapping the joints with a dental pick will determine which joint it is that needs resoldering. And should one ever decide to rebuild the speed control board, all components are still available.
Technics DD TT's at radio stations--sometimes DJ's will spill Coke or Coffee into them-the TT does some weird things-the platter Jitters and oscillates instead of rotating-The TT does its own "scratching" without manual assistence!To fix these "coketables" took the machine apart down to its chassis to where the motor circuit boards are exposed-wash them down liberally--then let the unit dry for several days-the one stations building boiler room helpted out here.Then reassemble the TT-then works OK.Again didn't adjust any of the pots on the motor boards.Since the Technics platter contains the motor rotor-its a VERY strong PM magnet-keep tools,filings and such away.Taping a plastic bag to it when the platter is off the TT base helps-and DON'T try to run the Technics TT with the platter removed-can burn out the stators in the motor(Base)
2,000 RPM Dual TT-If some Lapidary needs a faceting lap(tool for cutting faceted clear stones)thats for them!Just fasten the diamond lapping wheel to the platter-and attach the faceter and stone!Just a joke-but would be strange!
jasonl
New member
Magnavox end-table
This is my current quest, to find an end table unit. That's a later model but it still has a Collaro turntable and EV cartridge. Awesome sound!
This is my current quest, to find an end table unit. That's a later model but it still has a Collaro turntable and EV cartridge. Awesome sound!
Magnavox drum table
I bought mine two years ago for $35 at our Mustard Seed, it was pretty nice, but someone had put some dents into the wicker trimmed speakers. Has a great sound, but I have to keep it covered from the girl cat at the moment. I want the companion speaker, I found one years before I got this one! The changer is a two speed Automatic, which is the step down from the Micromatic in Yogi's set. Mine is a first or second year model, the first ones had plastic push button changers that failed rapidly, and were retrofitted quickly with the Automatic. Then during the successive years, they used the Micromatic and different and better receivers. The later ones are supposed to be sensational. I found one that looked like Yogi's, I swear it weighed twice what mine does. And the cabinets are plastic, or mostly so. They don't look the least bit cheap either.
I bought mine two years ago for $35 at our Mustard Seed, it was pretty nice, but someone had put some dents into the wicker trimmed speakers. Has a great sound, but I have to keep it covered from the girl cat at the moment. I want the companion speaker, I found one years before I got this one! The changer is a two speed Automatic, which is the step down from the Micromatic in Yogi's set. Mine is a first or second year model, the first ones had plastic push button changers that failed rapidly, and were retrofitted quickly with the Automatic. Then during the successive years, they used the Micromatic and different and better receivers. The later ones are supposed to be sensational. I found one that looked like Yogi's, I swear it weighed twice what mine does. And the cabinets are plastic, or mostly so. They don't look the least bit cheap either.
Here's that nasty plastic abomination for a changer:
My turntable....
....is a Technics SL-DD33 with Audio Technica AT250 cartridge.
It plays 33 and 45 rpm records and has automatic startup and shutdown.
I've used it to transfer all my vinyl to iTunes (some 500+ albums and 45's).
(This was done by burning a CD-RW on my Pioneer PDR-509 and then taking that CD, running it through "Click Repair" and finally importing to iTunes.
My first "real" turntable was a Garrard SL-95B which I bought while in high school.
My second turntable was a Garrard DD-75.
Also had a Dual changer and then a Pioneer Direct drive after those.
Here is a picture of the Garrard SL-95B.
....is a Technics SL-DD33 with Audio Technica AT250 cartridge.
It plays 33 and 45 rpm records and has automatic startup and shutdown.
I've used it to transfer all my vinyl to iTunes (some 500+ albums and 45's).
(This was done by burning a CD-RW on my Pioneer PDR-509 and then taking that CD, running it through "Click Repair" and finally importing to iTunes.
My first "real" turntable was a Garrard SL-95B which I bought while in high school.
My second turntable was a Garrard DD-75.
Also had a Dual changer and then a Pioneer Direct drive after those.
Here is a picture of the Garrard SL-95B.
Here's the Garrard DD-75
Garrard DD-75
Garrard DD-75
Alan, would music with a strong bass line make the china cups rattle?
Here's the Pioneer and Dual
1980's with rest of my system.
All Pioneer except Yamaha CD player (their 1st one).
Don't have any of it anymore.
Not seen below those is a Pioneer RT-707 reel-to-reel deck. Still have that!
1980's with rest of my system.
All Pioneer except Yamaha CD player (their 1st one).
Don't have any of it anymore.
Not seen below those is a Pioneer RT-707 reel-to-reel deck. Still have that!
philr
Well-known member
Allen,
This one looks quite similar to a Dual...
This one looks quite similar to a Dual...
Seeing all these great turntables makes me pine for my DD Pioneer PL-71. It was one of several turntables I had in high school, circa mid-'70s.
I had a beautiful linear-tracking Harmon Kardan in college, and later a Bang & Olufsen, which was destroyed in an accident. Now I have a crappy plastic Sony which I bought online a year ago. I don't play my records much---usually only to burn them onto a CD.
I still say you can't beat the depth and warmth of a top-notch turntable/cartridge combination.
I had a beautiful linear-tracking Harmon Kardan in college, and later a Bang & Olufsen, which was destroyed in an accident. Now I have a crappy plastic Sony which I bought online a year ago. I don't play my records much---usually only to burn them onto a CD.
I still say you can't beat the depth and warmth of a top-notch turntable/cartridge combination.
Thanks for the info on my barrel unit......I seen it and thought it was a great addition to the matching endtables we had in the family room.....its a suprise to everyone when they see it open up, and then to hear the great sound from something like this.........I mis the console stereo my parents had....those styles had great sound.....ours was a combination with the TV....
heres my Dual I got for 12.00.....I love the option to use it as a changer or as a single player......
heres my Dual I got for 12.00.....I love the option to use it as a changer or as a single player......
one of my original turntables from my MCS system.....linear tracking...and can hang on the wall....people get impressed seeing it playing almost upside down...I need to get a new belt for it....
This is a fun thread....thanks for sharing and posting everybody!
This is a fun thread....thanks for sharing and posting everybody!
one of my original turntables from my MCS system.....linear tracking...and can hang on the wall....people get impressed seeing it playing almost upside down...I need to get a new belt for it....
This is a fun thread....thanks for sharing and posting everybody!
This is a fun thread....thanks for sharing and posting everybody!
Alan, would music with a strong bass line make the china cup
I imagine strong bass would indeed make the china cups rattle, possibly even slide off or close to the edge too. Bone china may shatter, and cookies would turn back into flour. I love to pass on Magnavox information Yogi, it's my main mission in life-it would seem!
I have, or had a Garrard turntable like the last one shown so far. It's in storage if I do. I just bought one of those sleazy BSR/Panasonic changers from the late '60s to plug into one of my mini CD radio systems.
I imagine strong bass would indeed make the china cups rattle, possibly even slide off or close to the edge too. Bone china may shatter, and cookies would turn back into flour. I love to pass on Magnavox information Yogi, it's my main mission in life-it would seem!
I have, or had a Garrard turntable like the last one shown so far. It's in storage if I do. I just bought one of those sleazy BSR/Panasonic changers from the late '60s to plug into one of my mini CD radio systems.
whirlcool
Well-known member
Alan, would music with a strong bass line make the china cup
If you had a pair of JBL 4311's and an amp with 250W per channel it very well could!
If you had a pair of JBL 4311's and an amp with 250W per channel it very well could!
china rattle......thats nothing......when I lived in Princeton....if the neighbors could not hear/feel my music...they knew I was blasting the stereo by the lights flickering, I was Jamming!
I had a four piece rock band two houses west of me, making recordings in the back bedroom, never heard a sound out of them. Then one of the neighbors who is the drummer gave me a five song CD of one of their performances. I played it on the armoire theatre, through a Magnavox DVD player. Sounded good and solid.
Whirlcool, I think your JBL 4311s with 250 watts per would IONIZE the china!
Whirlcool, I think your JBL 4311s with 250 watts per would IONIZE the china!
whirlcool
Well-known member
I have a pair of JBL 4311's sitting in the closet. I swapped them out when I put in the AR-3a's. Right now I have a pair of Bang & Olufsen S75 speakers in my office connected up to a Beomaster 1900. The S75's really sound great. I think they are very under rated. I would say they sound as good as the 4311's at 1/3 the price.
electroluxxxx
Well-known member
when It comes to audio, I love my clarity. I have 2 turntables one is a pioneer pl-4 and the other is a technics SL-D2. the technics is run on a full pioneer system with a set of advent prodigy towers and a set of infinity 3000 speakers. the pioneer tt is hooked up to my 79' pioneer sx 780 and hooked to a pair of marantz 30/300 ill take some pics later 
twintubdexter
Well-known member
How very cool to see...
...all this interest in turntables and so many people using them. The two I currently use are both in console stereos...one is a very nice Magnavox remote-controlled Micromatic in my Imperial Armoire. The other unit, a freebee Magnavox console rescued from the curb had a replacement cheap Radio Shack plastic changer which I replaced with a Garrard A-70 from about the same vintage as the stereo. I always wanted one of those Garrards that changed records from the rear. I had to add a small inexpensive pre-amp for the magnetic cartridge.
I also have a Sansui linear-tracking turntable that's been in the closet for 10 years. All this interest in turntables has made me decide to hook it up to my main audio system and start using it. It has this cool tone arm that moves across the record and counts the number of tracks, then you just push the buttons on the front to play the selections in any order. The arm has a red light on the end and the platter is lighted too. Back in the 80's I thought this was soooooo space-age!
...all this interest in turntables and so many people using them. The two I currently use are both in console stereos...one is a very nice Magnavox remote-controlled Micromatic in my Imperial Armoire. The other unit, a freebee Magnavox console rescued from the curb had a replacement cheap Radio Shack plastic changer which I replaced with a Garrard A-70 from about the same vintage as the stereo. I always wanted one of those Garrards that changed records from the rear. I had to add a small inexpensive pre-amp for the magnetic cartridge.
I also have a Sansui linear-tracking turntable that's been in the closet for 10 years. All this interest in turntables has made me decide to hook it up to my main audio system and start using it. It has this cool tone arm that moves across the record and counts the number of tracks, then you just push the buttons on the front to play the selections in any order. The arm has a red light on the end and the platter is lighted too. Back in the 80's I thought this was soooooo space-age!
whirlcool
Well-known member
Linear tracking is supposed to be the best way to play records. You don't have to worry about tonearm skating drift towards the center of the platter. You also didn't have to jump through hoops getting the azimuth and overhang of the cartridge just right. The linear trackers used P-mount styli so it was just plug and play. Even Dual made one for awhile in the 80's, but they didn't make many.
For some reason the idea never caught on. Lots of manufacturers made them, but they never were big sellers.
For some reason the idea never caught on. Lots of manufacturers made them, but they never were big sellers.
I did have a Linear turntable. Been years forgot who made it, But the problem with it was not worth fixing.
The arm ran by a motor and string had the string break. To have that fixed was not worth it. They used a plastic system for it and the parts had started to break.
When it worked it was great 2 speed unit. Even had remote and you could set it to play and skip tracks.
Bad thing it was slow to play. Speed right on but took it forever to start the arm was slow as cold car oil.
The arm ran by a motor and string had the string break. To have that fixed was not worth it. They used a plastic system for it and the parts had started to break.
When it worked it was great 2 speed unit. Even had remote and you could set it to play and skip tracks.
Bad thing it was slow to play. Speed right on but took it forever to start the arm was slow as cold car oil.
Linear tracking is used on disc cutting lathes-but for a playback TT the linear tracking mechanism has to be well designed to move under just the forces of the stylus tracking the record.This is DIFFICULT to do.Pivot arms don't hve these problems and of course-so much less expensive.
Just a linear tracking was getting popular, compact discs started promising the world.
In theory, it is supposed to be the best way to play a record, but it isn't.
The problem is vibration mainly. Think of how a dial on a old radio works, the mechanism isn't that much different. Vibration from the record gets transmitted back through the mechanism and causes unwanted harmonics.
Conventional style arms don't suffer from these vibration issues. But it is a trade off because you can get distortion near the center of the record.
I think I'll stick with conventional tone arms for now..
I think linear tone arms were mostly a marketing thing. It wouldn't have been so bad if they engineered really high quality systems and mass manufactured them so they were affordable, but instead they tended to use plastic everything and thin wire.
If you really want a decently built linear-tracking turntable these days, you need to spend upwards of at least $10k, if not more.
The problem is vibration mainly. Think of how a dial on a old radio works, the mechanism isn't that much different. Vibration from the record gets transmitted back through the mechanism and causes unwanted harmonics.
Conventional style arms don't suffer from these vibration issues. But it is a trade off because you can get distortion near the center of the record.
I think I'll stick with conventional tone arms for now..
I think linear tone arms were mostly a marketing thing. It wouldn't have been so bad if they engineered really high quality systems and mass manufactured them so they were affordable, but instead they tended to use plastic everything and thin wire.
If you really want a decently built linear-tracking turntable these days, you need to spend upwards of at least $10k, if not more.
electron1100
Well-known member
I Love Vinyl
My latest turntable ( i have a had few)is a trusty old Technics SL-1800, since getting it i have tweaked and outboarded the power supply, put blue LEDs in place of the original neon strobe, re-wired the tone arm, put some damping in the arm tube, extra damping on the sub-chassis (not a solid plinth model), fitted a Audio Technica 0C-5 moving coil cartridge running through a NAD PP2 moving coil pre-amp into my Pioneer SX-850 1970s tuner amplifier (totally re-capped with Elna audio grade caps) running into Acoustic energy 100 speakers
The SL-1800 sounds far more pleasant and musical than my previous SL-1200mk11/Rega RB-300 tone arm set up, this deck also had various modifications which did improve its sound but i didnt like it in the end.
Turntables, i love them there are some beauties mentioned on here, the Dual 701 being one of them, I remember a display stand built by Dual with a 701 mounted upside down playing records, i never understood the reasons why but it was a good gimmick.
Gary
My latest turntable ( i have a had few)is a trusty old Technics SL-1800, since getting it i have tweaked and outboarded the power supply, put blue LEDs in place of the original neon strobe, re-wired the tone arm, put some damping in the arm tube, extra damping on the sub-chassis (not a solid plinth model), fitted a Audio Technica 0C-5 moving coil cartridge running through a NAD PP2 moving coil pre-amp into my Pioneer SX-850 1970s tuner amplifier (totally re-capped with Elna audio grade caps) running into Acoustic energy 100 speakers
The SL-1800 sounds far more pleasant and musical than my previous SL-1200mk11/Rega RB-300 tone arm set up, this deck also had various modifications which did improve its sound but i didnt like it in the end.
Turntables, i love them there are some beauties mentioned on here, the Dual 701 being one of them, I remember a display stand built by Dual with a 701 mounted upside down playing records, i never understood the reasons why but it was a good gimmick.
Gary
whirlcool
Well-known member
I remember the Dual 701 demo stations when they first came out. They would start playing a record (which was lightly glued to the platter) in a normal position, then the turntable would be tilted slowly until it was playing upside down, and all through the demo continued playing without missing a beat.
The purpose was to demonstrate that the arm of the 701 tracks so accurately that it is not affected by any other force of gravity and it will maintain the tracking force in the center of the groove in any position. That demo alone sold a lot of Dual 701's.
The purpose was to demonstrate that the arm of the 701 tracks so accurately that it is not affected by any other force of gravity and it will maintain the tracking force in the center of the groove in any position. That demo alone sold a lot of Dual 701's.
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