Sony PS-1800A at home...
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absolon
Super Member
Looks good Jack.
I stripped the finish on mine and modified tung oil to recoat; it's a tinted finish so sanding will show unless done very lightly. Mine was far worse than yours when it arrived.
I'll try the manual again tonight, also have some info on the mirror. I replaced it on mine since the old one was badly flaking.
Here's mine and a nudie:
I stripped the finish on mine and modified tung oil to recoat; it's a tinted finish so sanding will show unless done very lightly. Mine was far worse than yours when it arrived.
I'll try the manual again tonight, also have some info on the mirror. I replaced it on mine since the old one was badly flaking.
Here's mine and a nudie:
danj
modern primitive
Several years ago I restored a nice PS1800. After using it for awhile I donated it to a vintage audio museum in Grants Pass, OR which is owned and run by an old classmate. He has several of the old Sony tables there, including the PS2500, a couple of which are equipped with Rabco arms. If you're ever in Grants Pass you might wanna see what's in the loft at Grants Pass Music.
absolon
Super Member
These posts go into a bit more detail on the mechanisms.
http://audiokarma.org/forums/showpost.php?p=893329&postcount=572
http://audiokarma.org/forums/showpost.php?p=897170&postcount=573
http://audiokarma.org/forums/showpost.php?p=903320&postcount=582
http://audiokarma.org/forums/showpost.php?p=893329&postcount=572
http://audiokarma.org/forums/showpost.php?p=897170&postcount=573
http://audiokarma.org/forums/showpost.php?p=903320&postcount=582
Oh gosh, some Ebay dealie i looked at when I had my Thorens TD124MKII...
I actually feel like getting a new Thorens LP stabilizer..just for the box...lol
lordfoo
Active Member
Verry Nice!!!! Congratz on your SONY TT. A very purrtty piece of vintage equipment.
It makes me want to revisit my PS1800a shelved project. :scratch2: One of these days. I haven't even gotten around to removing the Bicentennial 1976 sticker on the front. I really wanted to pair the TT with my Sony VFET amp.
Anyone had a problem with the magnetodiode? That was the problem with mine which prevented the auto reject from working. Some of the venner has also flaked off.
Sir Absolon, i just saw your solution to your auto reject problem.
"The PS1800 reject and shutoff mechanisms are now functioning. There is a point in the linkage that binds sufficently that the 9V electromagnet can't overcome it. Lubrication and magnet repositioning solved the reject problem which also solved the shutoff problem as the mechanical logic requires the reject cycle before advancing to shutoff. "
I'll discuss this with my brod technician. BTW, your sony TT is simply, amazingly, gorgeously museum condition.
It makes me want to revisit my PS1800a shelved project. :scratch2: One of these days. I haven't even gotten around to removing the Bicentennial 1976 sticker on the front. I really wanted to pair the TT with my Sony VFET amp.
Anyone had a problem with the magnetodiode? That was the problem with mine which prevented the auto reject from working. Some of the venner has also flaked off.
Sir Absolon, i just saw your solution to your auto reject problem.
"The PS1800 reject and shutoff mechanisms are now functioning. There is a point in the linkage that binds sufficently that the 9V electromagnet can't overcome it. Lubrication and magnet repositioning solved the reject problem which also solved the shutoff problem as the mechanical logic requires the reject cycle before advancing to shutoff. "
I'll discuss this with my brod technician. BTW, your sony TT is simply, amazingly, gorgeously museum condition.
absolon
Super Member
One other issue that needed addressing on this TT was to replace the motor isolation foam donuts on the three motor mount bolts. The drive pulley on the motor has an extreme crown. If the belt isn't running in the correct position on it (high centre) the platter will tend to run off speed, just beyond the compensation range of the speed adjustment dial. The motor will throw the belt if the alignment is bad enough.
The foam donuts supporting the motor pretty much degrade to mush and consequently the motor hangs low and causes drive pulley misalignment which leads to the aforementioned faults. I can't remember what I used to replace them, but it took a few tries to get the alignment right.
The strobe is located in the black housing at the top left/centre of the nudie I posted. The housing is held in place with a couple of screws. There is a small panel attached to the inside of the housing with a single screw and it is this to which the mirror mounts. Should it be necessary to remove this panel to remount the mirror, stick a piece of tape to the housing to indicate the correct angle at which to remount it. It is a bitch to get it right by trial and error.
Lordfoo, thanks. It took a few hours. IIRC, the sticky point in the linkage was the notch in the end of the electromagnet actuated lever furthest from the magnet that served as the catch for the main lever. Took a few careful licks with a file to account for the wear that was causing the binding.
The foam donuts supporting the motor pretty much degrade to mush and consequently the motor hangs low and causes drive pulley misalignment which leads to the aforementioned faults. I can't remember what I used to replace them, but it took a few tries to get the alignment right.
The strobe is located in the black housing at the top left/centre of the nudie I posted. The housing is held in place with a couple of screws. There is a small panel attached to the inside of the housing with a single screw and it is this to which the mirror mounts. Should it be necessary to remove this panel to remount the mirror, stick a piece of tape to the housing to indicate the correct angle at which to remount it. It is a bitch to get it right by trial and error.
Lordfoo, thanks. It took a few hours. IIRC, the sticky point in the linkage was the notch in the end of the electromagnet actuated lever furthest from the magnet that served as the catch for the main lever. Took a few careful licks with a file to account for the wear that was causing the binding.
www.records
Quality over Quantity
NIce looking table Jack. Is it for sale yet?
