Too funny the 1st moment I heard it I was like did I hear what I thought I heard went back and sure enough I did LOL Dave reversed the audio with certain things he said LOL.
Hi Dave, I have the exact same turntable, I got it off eBay a couple of years ago , for £17 without a cartridge and it was running slow and the pitch control wasn’t able to provide enough adjustment . I found a RU-vid video on it and after adjusting the two pots I got it working replaced the cartridge and it’s been working fine ever since, really great turntable. Were you trying to find the hidden message by spinning the vinyl backwards?
Marcon capacitors. Oh joy. I have a bunch of those in my capacitor junk box from an IBM PC power supply and for giggles I tried reforming them (at microamps) and as they got close to their rated voltage they all cascaded to hard short circuit. They don't like sitting unused for 25 years. :)
I would have went for the speed control and those swtiches first - out of my experience with Technics 1200MKII drifting over the years - have to recalibrate the pitch slider - I know it's not the same turntable - but similar problem - cheers sir - good fix !
Where could I buy a meter like that? I am working on a Denon DP-33F right now and I think it might have bad capacitors. I guess with a meter like that one you don't need to desolder the caps from the board?
Had the same table in for repair once. Changed out all those Sanyo caps. The main issue was the .47uf cap and a couple resistors in the speed circuit plus a dirty speed switch and of course, the pitch pot.
Those Santo solid caps were problematic on Sony betamax back in the day. When i worked for Sony I changed out every Santo solid cap for another brand of tantalum. Not all would go bad but they failed in high enough numbers that they were changed. It was an assembly fault that caused the failure. Bend the leads and they break internal.
@@12voltvids Indeed I learned a little bit about how vinyl is recorded really quiet parts the audio is raised slightly to go over the noise floor and louder portions reduced somewhat to stay within the limits of the vinyl itself, which is absolutely unnecessary with digital. Vinyl purists I don't think realize that, but hey to each his own right?
Yep switches and pots/presets are a pain in the arse!. The rivits at the end of the pot track are a problem with vibration. I have a dislike of old wire wrap pins, i solder the top few turns for stability.
@@SPINNINGMYWHEELS777 Don't get me wrong, new wirewraps are great, but over the years damp gets in to them and even though they are fully wrapped with wire i've have had problems with the connection. But some units never fail. Bad solder joints on components are far more unreliable.
Think your speed (and direction) were drifting a little around 9:54 as well Dave! Was it an editing faux pas or a rock music "play it backwards" subliminal message though? lol (And do I now have to press the audio track onto vinyl and ruin a stylus running it backwards for the message to come through? Because YT don't support reverse play to my knowledge)
OK I'm up to 13:56 so far & it's pretty evident it's no slip of the mouse in post! Got me wondering now, might have to "reverse engineer" the audio later. Noticed some video strangeness also, but not tied to every audio flip.
@@danmackintosh6325 There are turntables out there that can reverse the motor direction and play backwards natively with a special stylus and cartridge
@@rawr51919 I don't doubt it, but your average rocker/metalhead wouldn't have had such kit back in the day (That was the reference I was making). Now you've piqued my interest though, could you suggest a TT model to look up and see what's going on with them?
@@danmackintosh6325 Not sure what models do that exactly either but I know they're out there. There's at least one RU-vid vid that shows one in action to play a backmasked section of vinyl the right direction
I have Aiwa cassette deck that changes speed randomly. This motor is a rather weird one. It has a transistor, couple of resistors and a trimmer pot for the speed adjustment. This is not very stable.
Check the resistance write it down shoot it with some contact cleaner and set it to the resistance you measured, at least it should be stable after cleaning it of course if the rivets aren't bad it should be anyway. It appears you have one of the better motors (PG feed back) I would check the solder joints as well if the circuit is not damaged you should be able to make the motor rock steady in its speed again.
@@alcoholisfreedrink It does have something to give a tach signal to the control circuit it MUST know that in order to regulate the speed. That makes the need for more trouble shooting. At this point I wonder if you may have a bad cap or perhaps a shorted or open resistor, it may even be a partly shorted drive transistor (leaky) it could be something in the mechanism that needs lubrication too, those motors do have torque ranges if it is excessive it could stall the motor or in some cases depending on the speed circuit cause full power to go to the motor in order to compensate for the additional load (at which point) the circuit is now sensing overspeed and it becomes a vicious rapid cycle. Another possibility is the commentator is dirty from years of use. Most of those motors can be taken apart easily and they can be inspected for pitting on the commentator and for worn brushes. EXERCISE extreme caution when taking it apart the brushes are very easy to damage they are thin and fragile so you've been warned. You should be able to monitor the motor without load and tell if it runs smoothly (not jerking or jumping in your hand) if it is that would be a very good indicator the brushes are not supplying power to one of the coils (typically 3) that will cause rapid flutter as the motor runs too.
@@darinb.3273 i have seen the inside of the exact motor and there was no feedback circuit. When the deck has been playing for some time it goes a bit fast
