Search found 121 matches
- Fri Apr 19, 2024 2:46 pm
- Forum: Secrets of the Lathe Trolls
- Topic: Rebuild/replace crystal phono cartridge
- Replies: 0
- Views: 1160
Rebuild/replace crystal phono cartridge
I have an old Rek-O-Kut 78 lathe that I mostly used for demonstrating how record cutting works, which has an Astatic B2 crystal phono cartridge (cutting head is a magnetic Audak Co art deco model.) Apparently someone had previously rebuilt it using an actual crystal, but it's now failed again. I'm t...
- Sat Apr 06, 2024 9:15 pm
- Forum: Experimenters' & Innovators' forum
- Topic: High-torque Turntable options for embossing
- Replies: 4
- Views: 897
Re: High-torque Turntable options for embossing
All the Rek-O-Kut rim drive turntables have enough torque generally to drive an overhead for cutting or embossing, you can often find them on ebay for around $200 or less as a bare turntable unit (no plinth or tonearm.) Since ROK also sold overhead cutters to go with the turntables they were designe...
- Tue Dec 26, 2023 3:33 pm
- Forum: Secrets of the Lathe Trolls
- Topic: Rek o kut cvs turntable question
- Replies: 0
- Views: 32259
Rek o kut cvs turntable question
Somehow I have yet another ROK turntable question: An acquaintance has a ROK cvs turntable for sale, but while the motor works, the platter does not turn. The idler wheel that turns the rim does not make constant contact with the tapered shaft on the motor, the pivoting arm that the idler is mounted...
- Thu Dec 21, 2023 6:56 pm
- Forum: Experimenters' & Innovators' forum
- Topic: Recommended DC motors for turntable
- Replies: 2
- Views: 4410
Recommended DC motors for turntable
Does this group have any recommended DC motors for driving lathe turntables? I'm assuming a high torque brushless dc is the way to go, but didn't know if anyone has a specific recommendation based on experience. I know Flo had used a Premotec on his modified portable lathe, any other suggestions? I'...
- Tue Aug 15, 2023 1:34 pm
- Forum: Secrets of the Lathe Trolls
- Topic: Presto feed finger question
- Replies: 5
- Views: 5607
Re: Presto feed finger question
Thanks for all the pictures! Mine is generally similar to the round style. I've attached a picture of an Allied one, plus the blank I've made so far. I think I will just shorten it and cut a slot for a replaceable blade like the Presto. Does the pin pass through a hole in the blade, or just butt up ...
- Mon Aug 14, 2023 4:57 pm
- Forum: Secrets of the Lathe Trolls
- Topic: Presto feed finger question
- Replies: 5
- Views: 5607
Presto feed finger question
I'm working on an Allied Recording lathe overhead, which is sort of a Presto 6n copy, and I was looking to make a new feed finger. I got to the point where I'd turned and threaded a piece of rod and was getting ready to file the blade end on (it's all one piece on this unit), when someone at the sho...
- Tue Aug 01, 2023 3:55 pm
- Forum: Secrets of the Lathe Trolls
- Topic: Rek O Kut Rondine Jr L-34 idler wheel question
- Replies: 2
- Views: 3503
Re: Rek O Kut Rondine Jr L-34 idler wheel question
The screws are already adjusted as far as they can go, to the point that the shaft for the speed selector knob hits the edge of its slot before it can even make contact with the screw adjustable stopper on the 33 side. But even so the capstan isn't firmly against the idler, there's still some remain...
- Sat Jul 29, 2023 4:27 pm
- Forum: Secrets of the Lathe Trolls
- Topic: Rek O Kut Rondine Jr L-34 idler wheel question
- Replies: 2
- Views: 3503
Rek O Kut Rondine Jr L-34 idler wheel question
Does anyone know if the 45 and 33 speed idler wheels on a Rek O Kut L-34 are supposed to be the same size? I acquired a partially working one where the idler wheel at the 33 setting does not make full contact with the motor pulley. Considering the simplicity of the mechanism, it seems either the idl...
- Fri May 26, 2023 9:51 pm
- Forum: Classifieds & tip-offs
- Topic: WTB: Rek-O-Kut M5S Adjustable Center part
- Replies: 5
- Views: 1302
Re: WTB: Rek-O-Kut M5S Adjustable Center part
Thanks for posting that! I went and looked at all my lead screws, and I have one 210 that has a narrower, very shallow hole in the end of the lead screw that mates to the center adjuster, clearly it requires the type of unit that you have. All my other lead screws have a deeper wider hole that mates...
- Tue May 23, 2023 7:02 pm
- Forum: Classifieds & tip-offs
- Topic: WTB: Rek-O-Kut M5S Adjustable Center part
- Replies: 5
- Views: 1302
Re: WTB: Rek-O-Kut M5S Adjustable Center part
I do have one, but if you could let me know if yours is the same size, I would appreciate it. I've seen photos of some units which appear to have a slightly different part. With the knurled nut removed, mine is 1 9/16" long, with the thicker section (5/16" diameter ignoring flattened surface) 1 1/16...
- Sun May 07, 2023 7:38 pm
- Forum: Classifieds & tip-offs
- Topic: WTB: Rek-O-Kut M5S Adjustable Center part
- Replies: 5
- Views: 1302
WTB: Rek-O-Kut M5S Adjustable Center part
I know this is unlikely, but I'm looking for the Adjustable Center piece for a Rek-O-Kut M5s (or could be from an M5 or probably any ROK 16" overhead.) This is the piece that goes through one endpiece of the overhead and into the end of the leadscrew, and is held in place by the Center Lock Screw. P...
- Sat Apr 22, 2023 9:05 pm
- Forum: Classifieds & tip-offs
- Topic: FS:Rek-O-Kut B-5 overhead with Astatic M41-8 head
- Replies: 1
- Views: 944
- Tue Apr 04, 2023 3:24 pm
- Forum: Classifieds & tip-offs
- Topic: FS:Rek-O-Kut B-5 overhead with Astatic M41-8 head
- Replies: 1
- Views: 944
FS:Rek-O-Kut B-5 overhead with Astatic M41-8 head
I'm selling an Rek-O-Kut B-5 record lathe 12" overhead. Comes with an Astatic M41-8 entry level magnetic head (lower power and fidelity compared to better heads), but is 8 ohm so it can be used with a standard power amp. Head tests good and sounds good with the cup test (send signal through the head...
- Fri Mar 24, 2023 1:36 pm
- Forum: Classifieds & tip-offs
- Topic: FS:RCA MI-4889 cutting head - 8 ohm
- Replies: 1
- Views: 820
- Sat Mar 18, 2023 1:10 pm
- Forum: Classifieds & tip-offs
- Topic: FS:RCA MI-4889 cutting head - 8 ohm
- Replies: 1
- Views: 820
FS:RCA MI-4889 cutting head - 8 ohm
I got this head along with some other stuff years ago, but have never used it, as I have a better head and my head carriage (modified fairchild) doesn't mate exactly to it. Sounds good with the cup test, and is the 8 ohm version so you can use it with a modern amp without needing a transformer. It's...
- Sat Oct 15, 2022 5:43 pm
- Forum: Secrets of the Lathe Trolls
- Topic: Rek-o-kut head mount adapters?
- Replies: 1
- Views: 1418
Rek-o-kut head mount adapters?
Going through my assorted spare parts, I have a couple of the smaller Rek-o-kut overheads (B5/M5) with the laydown style head mounts. Didn't there used to be someone on here that sold an adapter to modify them for a vertical mount head? I'm not sure whether to just unload them (I think I have a coup...
- Sat Oct 15, 2022 5:21 pm
- Forum: Secrets of the Lathe Trolls
- Topic: Presto 1-C vs Fairchild 541a vs RCA 11850 heads
- Replies: 1
- Views: 1426
Presto 1-C vs Fairchild 541a vs RCA 11850 heads
I was looking for opinions as to which of these three mono heads is better, assuming all three are in prime functioning condition. I know the Fairchild is supposed to have a more limited frequency range, but in my past experiences with one it seemed to have a higher output than a lot of heads, and d...
- Tue Jul 20, 2021 11:40 pm
- Forum: Secrets of the Lathe Trolls
- Topic: 120hz hum issue
- Replies: 5
- Views: 1116
Re: 120hz hum issue
If it was mechanical, you should hear it if the amp volume is turned down (like if the transformer was humming.) Are there any electrical items nearby that could be causing an induced hum, like fluorescent lights, dimmers, etc? Since you have an equitech and dedicated outlet it shouldn't be coming t...
- Sun Jul 18, 2021 8:39 pm
- Forum: Secrets of the Lathe Trolls
- Topic: 120hz hum issue
- Replies: 5
- Views: 1116
Re: 120hz hum issue
Likely a rectified power supply issue or related to the ground plane on a power supply. What is your set-up in terms of interconnected powered items? Does your power amp or preamp have any 120 hum when they're not connected to anything else? If so, there's some issue with their power supply. If not,...
- Thu Apr 29, 2021 5:08 pm
- Forum: Secrets of the Lathe Trolls
- Topic: Rek-0-kut Challenger TR-12H Caps replacement
- Replies: 9
- Views: 1539
Re: Rek-0-kut Challenger TR-12H Caps replacement
I think it depends on which caps he's referring to, as I've repaired a Rek O Kut amp (R8b I think) that had cardboard wrapped electrolytics. Which a person could think was a paper cap. Let your schematic be your guide! Note: I've also exploded a cap in my time, a supply rail tantalum. Went up like a...