Search found 118 matches

by Amp Doc
Mon Nov 26, 2007 5:39 pm
Forum: Secrets of the Lathe Trolls
Topic: mounting stereo cutter head on a presto 8N
Replies: 36
Views: 7566

how about mounting a slotted or toothed gead onto the lead screw and a hall effect devive to pick up the pulses as long as the carrage always starts a the same point you could work out the distance traveled by the pulses just like a car ecu knows the cam position of the cam from a toothed gear and s...
by Amp Doc
Sun Nov 25, 2007 5:57 pm
Forum: Secrets of the Lathe Trolls
Topic: mounting stereo cutter head on a presto 8N
Replies: 36
Views: 7566

The lines per inch remain constant all the way a 1KHz signal cut at begining has just as wide groove as at the center or on playback the level of signal would drop as the stylus reches the center.
by Amp Doc
Sat Nov 24, 2007 9:43 pm
Forum: Secrets of the Lathe Trolls
Topic: mounting stereo cutter head on a presto 8N
Replies: 36
Views: 7566

my pitch is set prior to cutting using belts and pullys. i have thourght about a stepper motor and circuit but I dont know enough about record cutting yet to do the mod but would be a nice addon when i get a stereo head. if the motor was mounted properly the ticks shouldnt be a problem the circuit s...
by Amp Doc
Sat Nov 24, 2007 6:55 pm
Forum: Secrets of the Lathe Trolls
Topic: mounting stereo cutter head on a presto 8N
Replies: 36
Views: 7566

On my 8N overhead i have oil damper and also there is a ajustable mounting for where you want the head to sit I dont know if this is standard or someone made it as my lathe has lots of mods on the overhead.the carrage is made of a 8N on the front and a 6N is fitted to the rear and steped pullys cone...
by Amp Doc
Sat Nov 24, 2007 8:06 am
Forum: Secrets of the Lathe Trolls
Topic: why sapphire?
Replies: 4
Views: 1595

sappire has little grain so cutting and polishing is easy compered to a diamond with has grain to deal with. I also seen that you can get ruby stli for the ortofon dss heads.
by Amp Doc
Sat Nov 24, 2007 8:04 am
Forum: Secrets of the Lathe Trolls
Topic: mounting stereo cutter head on a presto 8N
Replies: 36
Views: 7566

My 8N has vari pitch from one lead screw 83 to 302 lines per inch it was converted by Mr john d harmer prestident and chief engineer of capital city sound recording co. and he even sent me the write up which he published in broadcast engineering detailing how the mod was done using the 8N overhead a...
by Amp Doc
Fri Nov 23, 2007 6:18 pm
Forum: Secrets of the Lathe Trolls
Topic: mounting stereo cutter head on a presto 8N
Replies: 36
Views: 7566

mounting stereo cutter head on a presto 8N

Has anyone mounted a stereo cutterhead to a presto 8N I have a grampian head works well but would like to upgrade to a stereo head soon but I read on presto history site that large heads will not mount to the carrage so before I buy a stereo head would like to know if it will fit?? Would like somthi...
by Amp Doc
Mon Nov 19, 2007 4:59 am
Forum: Secrets of the Lathe Trolls
Topic: Systems vs components
Replies: 12
Views: 4477

Hello... I have read something on the net quote "The biggest threat to cd is the revival of vinyl wich is slowly gong up while cd is is slowly going down in sales. new digital formats are taking over from cd but vinyl gets stronger every day" Ye Ha .
by Amp Doc
Tue Nov 13, 2007 2:46 pm
Forum: Secrets of the Lathe Trolls
Topic: Grampian Type D
Replies: 18
Views: 5311

Hi lewis very busy at moment at work so not got anything done to the amp. have made a active RIAA network though and am runing one of the 500w lateral n channel mosfet amp modules I make no feedback yet but gives good results so cant wait till I get time to use feedback.
by Amp Doc
Sat Oct 20, 2007 2:15 pm
Forum: Classifieds & tip-offs
Topic: Looking for Presto K8 K10 or complete system to get started
Replies: 1
Views: 1199

There is a good starter lathe on ebay at the moment but may be a little pricey but it has everything I posted it here a few days ago is a presto 6N
by Amp Doc
Tue Oct 09, 2007 4:47 pm
Forum: Classifieds & tip-offs
Topic: neumann lathe on ebay
Replies: 3
Views: 1555

Very cheeky didnt think ebay alowed that!
by Amp Doc
Mon Oct 08, 2007 4:25 pm
Forum: Classifieds & tip-offs
Topic: (Non) Feedback heads
Replies: 1
Views: 1036

the feedback acts as a servo system controling resonances and improving frequency responce its applied out of phase to the input signal of the drive amp thus canceling out unwanted resonaces. its expalaned in the other section in detail.h
by Amp Doc
Sat Oct 06, 2007 7:31 pm
Forum: Classifieds & tip-offs
Topic: Saw this on ebay- Presto Pirouette?
Replies: 2
Views: 1309

Think is it the platter for a lathe but never see anything like. would be good for a vinylilium overhead and cutter
by Amp Doc
Sat Oct 06, 2007 4:26 pm
Forum: Classifieds & tip-offs
Topic: SX68 SX74 styli on ebay
Replies: 2
Views: 1472

hello the auction has ended but you could email him to see if he has any more it did say on auction that he had a few of them his Ebay id is llkk33reens and this is one of his auctions http://cgi.ebay.co.uk/DEMONSTRATION-FOR-LASERVISION-LASERDISC-LIKE-NEW_W0QQitemZ190159437105QQihZ009QQcategoryZ381Q...
by Amp Doc
Thu Sep 20, 2007 2:55 pm
Forum: Secrets of the Lathe Trolls
Topic: Recordette still not working? What gives? Improper weight?
Replies: 23
Views: 7076

stylus

the styli transco supply have a heating coil already mounted on them but I dont know what one your head uses. you could ask gib at westtech may be a 362 transco might fit its a short shank grampian type you would use a 6v power supply at about 450mA current for the heating coi. Or you could try heat...
by Amp Doc
Sun Sep 16, 2007 6:00 pm
Forum: Classifieds & tip-offs
Topic: SX68 SX74 styli on ebay
Replies: 2
Views: 1472

SX68 SX74 styli on ebay