New Posts New Posts RSS Feed - Rega Exact
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Welcome to the Graham Slee Audio Products Owners Forum

 

Open to all owners plus those contemplating the purchase of a Graham Slee HiFi System Components audio product and wishing to use this forum's loaner program: join here (Rules on posting can be found here)

This website along with trade marks Graham Slee and HiFi System Components are owned by Cadman Enterprises Ltd


Rega Exact

 Post Reply Post Reply
Author
Fatmangolf View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 23 Dec 2009
Location: Middlesbrough
Status: Offline
Points: 9695
Post Options Post Options   Thanks (0) Thanks(0)   Quote Fatmangolf Quote  Post ReplyReply Direct Link To This Post Topic: Rega Exact
    Posted: 10 Jul 2011 at 11:54am
In another thread I mentioned that my Rega P3-24 now has a Rega Exact in it again and that I was enjoying it. Compared to my Goldring G2500, the Exact's positioning of instruments and detail isn't quite as good but is fun to listen to.
 
Plenty of dynamics and bass. Decent stereo image and plenty of room filling sound. I think it is load dependent, which I will go into later.
 
I fitted it using a Baerwald arc protractor printed out from another online forum's library. This, in my opinion, is much much better than the Rega standard alignment. However you lose the rigity of the three point mount because the front hole screw ends up at the end of the headshell. No extra spacers (for the Goldring I used the 4mm spacer on Rega's multi-height ring). 1.75g VTF at the surface of a standard LP (i.e. not a 180/200g). Bias/anti-skate set with the rough scale then adjusted for a central image on the middle tracks.
 
Rega don't publish a lot of electrical data for their cartridges. By inference the 47k and 100pF internal loading of their phono preamp would be the right loading. Out of curiosity I measured the Rdc and estimated the self-inductance of the Elys2 and my Exact by plotting the impedance/frquency graph. The Exact isn't perfectly matched, I made the left channel 163 Ohms and 100mH compared to 166 Ohms and 90mH for the right. Anyway 100mH and 165R is near enough for what comes next.
 
I plugged the 100mH and 165 Ohms into a couple of simple LC resonance models and came to this practical result:
 
Use the Genera's standard 220pF (plus 100pF for cables) loading with and 18K combined resistance. I used a t-adaptor and 29K resistor inside a phono plug to get this result. I think it sounds much better than 100pF and 47K.
 
Anyway I am enjoying listening to it. Helpful tip - it does a better job on clean records.
 
Hope this useful information to someone else at some point!
 


Edited by Fatmangolf - 10 Jul 2011 at 11:57am
Jon

Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC.
Back to Top
Fatmangolf View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 23 Dec 2009
Location: Middlesbrough
Status: Offline
Points: 9695
Post Options Post Options   Thanks (0) Thanks(0)   Quote Fatmangolf Quote  Post ReplyReply Direct Link To This Post Posted: 11 Jul 2011 at 9:09pm

It is a high output cartridge at 7.2mV and I am wondering if I could reduce the gain of the Genera a bit?

Jon

Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC.
Back to Top
Paperweight View Drop Down
Regular
Regular
Avatar

Joined: 21 Mar 2011
Location: Lexington NC US
Status: Offline
Points: 84
Post Options Post Options   Thanks (0) Thanks(0)   Quote Paperweight Quote  Post ReplyReply Direct Link To This Post Posted: 21 Dec 2011 at 1:50pm
I think Rega's stock cartridge alignment uses the Stevenson protractor. What specific improvements did you notice using a Baerwald protractor setup?
Back to Top
Fatmangolf View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 23 Dec 2009
Location: Middlesbrough
Status: Offline
Points: 9695
Post Options Post Options   Thanks (0) Thanks(0)   Quote Fatmangolf Quote  Post ReplyReply Direct Link To This Post Posted: 21 Dec 2011 at 11:14pm
Yes, the Rega setup's effective length is about the same as Stevenson. I think the sound improves with Baerwald (aka Lofgren A), notably clearer on the first couple of tracks. I suggest trying the Rega Baerwald protractor on Vinyl Engine.
 
As you will probably have guessed the third/front screw can not be fitted as you can see in my quick photo below. I think Baerwald was about 1mm less than Lofgren B shown in my picture so you would just see the very edge of the front hole.
 
 
The improvement in sound from using Baerwald is worth the fiddling around in my opinion.
 
Please let me know if you want any more information and let us know what you think if you try this.


Edited by Fatmangolf - 21 Dec 2011 at 11:33pm
Jon

Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC.
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.01
Copyright ©2001-2018 Web Wiz Ltd.

This page was generated in 0.070 seconds.