Mpp - Page 937 - diyAudio
Go Back   Home > Forums > Source & Line > Analogue Source

Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 14th July 2013, 01:15 AM   #9361
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
I supply the Kean double mono. Each channel has its separate set of batteries.
I do the square wave overshot trick too sometimes. I then use a single, well damped overshot. That can give the impression of more speed, dynamics and focus.
I know that. I just would not do it on the prototype because it is strong medicine.
  Reply With Quote
Old 14th July 2013, 03:49 AM   #9362
diyAudio Member
 
danielwritesbac's Avatar
 
Join Date: Nov 2007
That seems like good news.

Kean has several buffers, but this one is called: Kuartlotron
For some or no reason, it took me about 6 months before successfully memorizing how to spell it.

Just a note. If the Kuartlotron happens to lose the contest on account of focus, you can switch the outputs to BC556C, BC546C or BC550C, BC560C to slightly increase the focus at some slight cost to tone function, quite proportionately too. A very minor change indeed. But, more "focus" really is available by exchanging the medium signal outputs for small signal outputs instead.

Also, both trimmers, R1 and R5, can change the "focus" and tone a little bit, so if you're highly sensitive to those functions then you might want to have the trimmers installed for adjustment.

I probably don't know anything else about this circuit. Yeah, that was it.
__________________
Tools, Models & Software for DIYClipNipper boostLM1875 TurboPowerful TDA7293 kitTDA7294 pt2pt ♦ My post has opinion.
  Reply With Quote
Old 14th July 2013, 04:03 AM   #9363
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
Thanks, i did not trim so far but i will.
Have now made both channels the same and will listen.
  Reply With Quote
Old 14th July 2013, 04:57 AM   #9364
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
focus restored.
What i can say is that the Kean buffer sounds exceptionally sweet without loosing detail.
Music sounds really different and new to me.
  Reply With Quote
Old 14th July 2013, 01:29 PM   #9365
diyAudio Member
 
keantoken's Avatar
 
Join Date: Aug 2006
Location: Texas
Blog Entries: 2
Thanks Joachim.

If you used the 56R (or 47R rather) resistors, then I'm guessing you built it as per the schematic, with BC550C NPN's.
  Reply With Quote
Old 14th July 2013, 01:49 PM   #9366
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
Yes. I will do more listening today.
  Reply With Quote
Old 18th July 2013, 10:39 AM   #9367
RCruz is offline RCruz  Switzerland
diyAudio Member
 
RCruz's Avatar
 
Join Date: Sep 2006
Location: Wallis
Blog Entries: 1
Joachim, here is a link to the tonearm I am working on. SUPEX AL-2 Tonearm lift repair

I believe it is a Micro Seiki modified.... Any hints on fluids would be very welcome.

PS: sorry for the off topic.
__________________
RC
  Reply With Quote
Old 18th July 2013, 12:42 PM   #9368
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
That Supex arm looks like a Fidelity Research.
  Reply With Quote
Old 18th July 2013, 08:14 PM   #9369
RCruz is offline RCruz  Switzerland
diyAudio Member
 
RCruz's Avatar
 
Join Date: Sep 2006
Location: Wallis
Blog Entries: 1
Mr. Ikeda owns Fidelity Research I believe.
__________________
RC
  Reply With Quote
Old 18th July 2013, 08:29 PM   #9370
brianco is offline brianco  Ireland
diyAudio Member
 
brianco's Avatar
 
Join Date: Aug 2005
Location: Scottish Borders - Kelso; on the famous Tweed River!
HAving never heard of a Supex arm, I googled and found that the reference applies only to a lift/lower device. The arm shown is some hybrid I guess loosely based on the WTA, but its damped lift/lower device is very similar to that on the FR arm which is shown in the last picture. It is that part alone which is 'Supex' from what I can find.

Fidelity Research ceased production many years ago. The same man then designed an updated version which is the Ikeda arm. I had a few FR64S arms over the years and they were excellent with low compliance MCs. Indeed the FR 700/701 MCs were brilliant in my view and so musical. I converted one by removing it from it's FR headshell/casing and fixed it in a solid Audio Tekne style head-shell. That one was the best. All of this I obtained from the old UK importer when FR stopped production and it was their entire review stock. ...but the 66S had already gone elsewhere!!

Last edited by brianco; 18th July 2013 at 08:37 PM.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



New To Site? Need Help?

All times are GMT. The time now is 05:19 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2