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   Home » Analog Playback» Where are our good phonostages? (62 posts, 4 pages)
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  »  New  Another interesting corrector: Likhnitsky's RX correcto..  Again, the capacitors...  Analog Playback Forum     6  52857  02-10-2005
  »  New  Lamm LP2 phonostage: review of review...  Another stupid Lamm LP2 review....  Analog Playback Forum     2  50479  03-05-2005
  »  New  7788 tube mic pre design..  Read my leaps: Absorb-GEL...  Analog Playback Forum     38  294330  02-14-2006
  »  New  Jonathan Valin smokes Lamm LP2..  Jonathan Valin smokes Lamm LP2...  Analog Playback Forum     0  20871  03-27-2006
  »  New  I need a “second-type” phonostage...  BBC Proms...  Analog Playback Forum     38  283577  05-28-2006
  »  New  The LCR RIAA correctors..  Inductive RIAA link...  Analog Playback Forum     57  596793  07-11-2007
  »  New  A truly cool solution for RIAA re-tuning…...  Dialing in...  Analog Playback Forum     2  23535  08-29-2007
  »  New  The last phonocorrector: “End of Life" Phonostage..  Valvo mesh 0A2...  Analog Playback Forum     301  1479262  11-13-2007
  »  New  An interesting Russian pnonocorrector...  Uber-tweeky phono topologies deconstructed...  Analog Playback Forum     9  67884  03-01-2010
12-26-2013 Post does not mapped to Knowledge Tree
audiosix
Posts 2
Joined on 12-26-2013

Post #: 61
Post ID: 20395
Reply to: 20223
Used Tubes
fiogf49gjkf0d
 Paul S wrote:
http://app.audiogon.com/listings/omnigon-full-function-tube-preamplifier-phonostage

Looks like a serious effort that has been kicking around for a while.

What tubes are used? Are they twin triode, like 12AX7 or - more likely - 6922?  Both types offer a lot of options in terms of sound via tube swapping, and also via adjusting operating points.

Labels on transformers might be Lundahl?

Is initial gain passive (transformer), or...?

Is this RIAA-only?

Best regards,
Paul S


A few details - the easy stuff ..:

Phono specs for OmniGon s/n 10 (ALF's):
RIAA accuracy (20 Hz to 20 kHz): better than +/- 0.1 dB.
Phono linear phase derivation (DLP) 20 Hz to 20 kHz phono MM: less than + 0.2°
Phono linear phase derivation (DLP) 20 Hz to 20 kHz phono MC (3-6 Ohms): less than + 1.5 °
Frequency response Phono MC1: -3 dB at 0.4 Hz and 210 kHz
Phono Overload MM: 400 mV
Phono Overload MC 1: 38 mV
Phono MM IMD RIAA de-emp. 20 Hz to 20 kHz: less than 0.019%
Phono MM THD RIAA de-emp. 20 Hz to 20 kHz: less than 0.02%
Phono MC1 IMD RIAA de-emp. 20 Hz to 20 kHz: less than 0.03%
Phono MC1 THD RIAA de-emp. 20 Hz to 20 kHz: less than 0.03%
Channel separation Phono: 92 dB
Output impedance: 120 Ohms
Tube complement: VT229 (2x), VT231 (2x), E80cc (4x), CV135 (4x)

And .... Lundahl cokes only inside power supply .... Syntax' pictures do only show the part of the iceberg which is above water line ...
12-31-2013 Post does not mapped to Knowledge Tree
audiosix
Posts 2
Joined on 12-26-2013

Post #: 62
Post ID: 20414
Reply to: 20395
Omnigon Tubes
fiogf49gjkf0d
No more interest in this subject?

Reinhard
Page 4 of 4 (62 items) Select Pages:  « 1 2 3 4
   Target    Threads for related reading   Most recent post in related threads   Forum  Replies   Views   Started 
  »  New  Another interesting corrector: Likhnitsky's RX correcto..  Again, the capacitors...  Analog Playback Forum     6  52857  02-10-2005
  »  New  Lamm LP2 phonostage: review of review...  Another stupid Lamm LP2 review....  Analog Playback Forum     2  50479  03-05-2005
  »  New  7788 tube mic pre design..  Read my leaps: Absorb-GEL...  Analog Playback Forum     38  294330  02-14-2006
  »  New  Jonathan Valin smokes Lamm LP2..  Jonathan Valin smokes Lamm LP2...  Analog Playback Forum     0  20871  03-27-2006
  »  New  I need a “second-type” phonostage...  BBC Proms...  Analog Playback Forum     38  283577  05-28-2006
  »  New  The LCR RIAA correctors..  Inductive RIAA link...  Analog Playback Forum     57  596793  07-11-2007
  »  New  A truly cool solution for RIAA re-tuning…...  Dialing in...  Analog Playback Forum     2  23535  08-29-2007
  »  New  The last phonocorrector: “End of Life" Phonostage..  Valvo mesh 0A2...  Analog Playback Forum     301  1479262  11-13-2007
  »  New  An interesting Russian pnonocorrector...  Uber-tweeky phono topologies deconstructed...  Analog Playback Forum     9  67884  03-01-2010
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