The Secret Society of Lathe Trolls

The item is now sold. Thanks!

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I have decided to sell my Rek O Kut Imperial. I am currently a university professor of audio production. I purchased it about ten years ago when I was working on my thesis project. Over the past 4 years I've used it about once or twice per year to conduct demonstrations for my audio production stude...

Yes, I'm specifically trying to find a Presto 1D or 1C magnetic cutting head. I don't need the whole lathe unit, just the cutter head like the one in this picture.

Howdy Trolls, it's been a while since I've posted anything. I've been working on a Rek O Kut Imperial. I'm searching for a Presto cutter head to install onto it because the Audax cutter that was originally on it doesn't work very well. I've searched EBay but haven't found anything. If anyone has a P...

Do you think this would work:http://www.amazon.com/Elenco-Variable-Voltage-Power-Supply/dp/B0002D0ROO/ref=sr_1_7?s=electronics&ie=UTF8&qid=1408942328&sr=1-7&keywords=dc+power+supply+adjustable

I just purchased a box of large turntable motors, the ones with the big magnets. They look very similar (almost identical) to the motors on my RekOkut Imperial Lathe and my Presto lathe. Are these the types of motors you're talking about? I sure hope so, because I got a great deal on these motors an...

I'm working on a project in which I am using an old 60Hz turntable motor to turn a small wooden wheel that's coated with rosin in order to rub against a guitar string to make sound (similar to the inner workings of a hurdy gurdy/wheel fiddle.) Does anybody here know what kind of potentiometer I coul...

I bought one of the long shank cutting styli from Transco/Apollo and it's long enough to tilt the cutter head angle back to 5 degrees, which is the proper angle specified in the Presto manual. It works really well.

Hello Trolls, I've got wonderful news! Mark was correct, it was the C109 capacitor. Here's what happened: when I replaced all of the capacitors, I mistakenly installed a non-polarized orange dip capacitor rather than a polarized electrolytic cap. Being new to the electronics repair game, I was unawa...

I don't see any electrolytic capacitors. All I see are orange drops where there used to be wax foil caps (the ones I replaced) and a whole bunch of resistors. I can't find anything that I would recognize as an electrolytic capacitor. Am I missing something? Here's the schematic. Presto K8 Schematic....

I can't download the resistor calculator that you recommended because I use a Mac. However, I found this cool resistor calculator that works as a Mac dashboard widget. It seems to work really well too!
https://www.apple.com/downloads/dashboard/calculate_convert/resistulator.html

When I remove the 6N7 tube (V104 on the schematic) or either of two 6SQ7 tubes (V102 and V103 on the schematic) the oscillation stops. However, when I remove the 6SQ7 tube labelled V101 on the schematic, the oscillation continues.

Thanks. You guys are really great. Thanks for your time and attention. Here is a link some pics and the schematic.
https://www.flickr.com/photos/alexkirt/sets/72157645927448075/

I just realized that you were talking about adding capacitors into the circuit and not resistors. Sorry about that. Like I said, I'm in the process of learning. Thanks for being patient.

When I unplug the preamp tube(s) the oscillation stops. I'm thinking that your diagnosis might be correct. I'm a new student of tube circuitry, so I'm not exactly sure what the B+ rail is? One thing I wanted to ask: is it possible that the original resistors may also need to be replaced? Some of the...

I guess it would help if I posted the link to the youtube video.
[YouTube2]http://youtu.be/f8yTM_9tstk[/YouTube2]

I have a Preso K8. I've replaced all of the capacitors and tubes. It works pretty well. I've already recorded many local bands with it. However, there is one consistent problem that continues to haunt me: when I turn on the amp section of the unit, once the tubes warm up, it starts pulsing slightly....

Thanks so much for the dimensions. It appears that my 45 & 33 idlers are the same as yours, therefore I'd assume the same for the 78. I'll post my results here soon. Thanks again!

Can anyone here give me the dimensions of the 78rpm idler wheel for the Rek O Kut Imperial? I've been looking to purchase one but I can't find one, so I'm going to make one myself if I can find the correct measurements.