Search found 429 matches
- Wed Apr 10, 2024 11:00 am
- Forum: Experimenters' & Innovators' forum
- Topic: New Embossing Stylus!
- Replies: 87
- Views: 490472
Re: New Embossing Stylus!
Pretty close, I think. As I recall, I was shooting for 18 degrees, although I'm not sure where that number came from. Maybe an average of what I had read here about other Trolls 'leaning their heads back.'
- Wed Apr 10, 2024 10:52 am
- Forum: Secrets of the Lathe Trolls
- Topic: Soundscriber excecutive
- Replies: 20
- Views: 4808
Re: Soundscriber excecutive
Hey, TognaB; here's a link to a write-up on the project.
https://www.schlockwood.com/_files/ugd/aee96f_180a574b56ae4b6b8b301596b5a26719.pdf
https://www.schlockwood.com/_files/ugd/aee96f_180a574b56ae4b6b8b301596b5a26719.pdf
- Sun Apr 07, 2024 2:17 pm
- Forum: Secrets of the Lathe Trolls
- Topic: Soundscriber excecutive
- Replies: 20
- Views: 4808
Re: Soundscriber excecutive
Good find; I'd get it if I were you. 99% sure that it's an embosser, unless Soundscriber had some 'crossover' models between technologies, but I am not aware that they ever did mag-sheet recorders. Best to build electronics from scratch, rather than work with circuits optimized for voice. Somehow I ...
- Wed Apr 03, 2024 3:46 pm
- Forum: Secrets of the Lathe Trolls
- Topic: Weird LP cylinder format made by Kenner Toy Company of Cincinnati
- Replies: 3
- Views: 1422
Re: Weird LP cylinder format made by Kenner Toy Company of Cincinnati
You're right, Mark. Ping-pong clicks and pops are far more distracting than mono ones. It's been decades since I looked for (and easily found) a mono crystal/ceramic pickup; are they still made, I wonder? I wasn't aware that stereo ones were available, but never had to look for one. I remember when ...
- Wed Apr 03, 2024 2:00 pm
- Forum: Secrets of the Lathe Trolls
- Topic: Weird LP cylinder format made by Kenner Toy Company of Cincinnati
- Replies: 3
- Views: 1422
Re: Weird LP cylinder format made by Kenner Toy Company of Cincinnati
Now THAT is interesting! Thanks for posting. I had young kids back then but never came across this item in any toy stores. Heck, I'd have bought one... for me! A browser search doesn't bring up a lot, but there was one image file that linked to a YouTube video of this jukebox in operation: https://w...
- Sat Feb 17, 2024 4:10 pm
- Forum: Experimenters' & Innovators' forum
- Topic: New Embossing Stylus!
- Replies: 87
- Views: 490472
Re: New Embossing Stylus!
Yes. And note that the angle to the record surface is similar to what our Trolls typically recommend. What Soundscriber has done here is the proper way, translating the lateral motion of the armature to lateral groove modulation. If instead, as practiced by most experimenters, you "lean the head bac...
- Sat Feb 17, 2024 10:50 am
- Forum: Experimenters' & Innovators' forum
- Topic: New Embossing Stylus!
- Replies: 87
- Views: 490472
Re: New Embossing Stylus!
Wow, good find, tape! This patent is something to digest; I hope that between the lot of us we can figure it out. It might well be worth looking at the references cited at the end of the patent also. Any departure from a spherical embossing stylus may negate the drawbacks noted by Milton Morse in th...
- Sat Feb 17, 2024 9:37 am
- Forum: Secrets of the Lathe Trolls
- Topic: Soundscriber excecutive
- Replies: 20
- Views: 4808
Re: Soundscriber excecutive
I'll bet that, by the time this model came out, tape was taking over in the office. Pity, it is a beautiful machine!
- Thu Jul 20, 2023 12:12 am
- Forum: Experimenters' & Innovators' forum
- Topic: JE-1D Version 356
- Replies: 59
- Views: 163106
Re: JE-1D Version 356
For an embossed track, that's really pretty darned good. Better results than I've ever had. Good work!
- Sun Apr 16, 2023 11:35 am
- Forum: Experimenters' & Innovators' forum
- Topic: JE-1D Version 356
- Replies: 59
- Views: 163106
Re: JE-1D Version 356
Very commendable results, John. I think you really nailed this 1D re-engineering project. Congratulations! I remember back to my Presto 1D days, and how top-end response could be extended from 10kHz to 15kHz simply by cutting the traditional "long shank" stylus down to "short shank" length. The long...
- Thu Mar 16, 2023 10:36 am
- Forum: Experimenters' & Innovators' forum
- Topic: JE-1D Version 356
- Replies: 59
- Views: 163106
Re: JE-1D Version 356
You're making good progress, JJW, and taking the time to do that empirical testing along the way too! "Responsible R&D," good man!
- Fri Mar 10, 2023 12:25 pm
- Forum: Experimenters' & Innovators' forum
- Topic: Where to get (Oil) Dashpot?
- Replies: 6
- Views: 8111
Re: Where to get (Oil) Dashpot?
Holy moly! Three hundred bucks for that? Back in the '60s, the university I attended had a Presto 8DG that, by that time even, was never used in the 4 years I was there. At the time I was cutting commercials and station IDs at home onto 16" discs for a local TV station that hadn't yet migrated to c...
- Thu Mar 09, 2023 11:14 pm
- Forum: Experimenters' & Innovators' forum
- Topic: Where to get (Oil) Dashpot?
- Replies: 6
- Views: 8111
Re: Where to get (Oil) Dashpot?
If you're using the dashpot simply to lower the cutterhead, an airpot ought to work just fine. The action of an air dashpot vs. an oil one is sort-of 180-degrees. An oil dashpot is effective against small, rapid up/down motion, an airpot sort of neglects that and is better at controlling large ampli...
- Thu Sep 15, 2022 12:22 am
- Forum: Experimenters' & Innovators' forum
- Topic: JE-1D Version 356
- Replies: 59
- Views: 163106
Re: JE-1D Version 356
Good advice from Mark! As for the DSP board, I've used those (probably from another source, but how different can they be?) and never had a noise problem. Make sure that the gain structure through your equalizer lashup is where it belongs. That chip has lots of dynamic range; what you describe sound...
- Sat Aug 27, 2022 2:37 pm
- Forum: Experimenters' & Innovators' forum
- Topic: JE-1D Version 356
- Replies: 59
- Views: 163106
Re: JE-1D Version 356
Prestoflex was about 1/8 inch thick (3.2mm). Beautiful work on those armatures, you're good! That would be a quite involved YouTube video, I would think, well beyond the skill level of most of us.
- Fri Aug 26, 2022 11:42 am
- Forum: Experimenters' & Innovators' forum
- Topic: JE-1D Version 356
- Replies: 59
- Views: 163106
Re: JE-1D Version 356
Good to see continued experimentation and progress. And you may be right about over-damping; Presto relied pretty much on damping against the mass of the Prestoflex® block (which I think was pretty much just Neoprene), with it held lightly at just the one point to keep the damper assembly from unscr...
- Sat Aug 20, 2022 1:15 pm
- Forum: Experimenters' & Innovators' forum
- Topic: JE-1D Version 356
- Replies: 59
- Views: 163106
Re: JE-1D Version 356
All good learning... and progress; keep at it! And I like the embossing angle you're using now, closer to vertical. Plus, I don't know the exact geometry of your stylus, but would think that the closer to vertical that it is, the smaller the area actually in contact with the surface of the blank. So...
- Mon Aug 15, 2022 4:30 pm
- Forum: Experimenters' & Innovators' forum
- Topic: JE-1D Version 356
- Replies: 59
- Views: 163106
Re: JE-1D Version 356
Wow, like the 'diameter equalizers' of the pre-microgroove era. If that's for real it indicates that 'penetration' may be inversely proportional to groove velocity. If I had a Ph.D. I might be able to write an equation for that... for all the good it would do. Yeah, maybe because of stylus geometry ...
- Mon Aug 15, 2022 2:54 pm
- Forum: Classifieds & tip-offs
- Topic: FREE Vacuum Pump
- Replies: 0
- Views: 3691
FREE Vacuum Pump
Can someone use this? Some time ago I ran across this item in an eBay listing: Snap3.jpg ...and wondered if it had applicability to our hobby. So I bought one and found that it did, indeed, provide plenty of suction. The only drawback is that it runs off 12 volts DC and pulls about 10 amps when it's...
- Sun Aug 14, 2022 7:04 pm
- Forum: Experimenters' & Innovators' forum
- Topic: JE-1D Version 356
- Replies: 59
- Views: 163106
Re: JE-1D Version 356
Okay, thanks for all that; makes good sense. I'm not sure I understand how your springs provide any flex at all without the omega bend, it seems like they'd be compressing rather than flexing. But the implied increased stiffness probably accounts for the HF response extended past that 7-8kHz point y...