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-   -   Valkyrie.... line-stage preamp..... info?? (http://www.diyaudio.com/forums/solid-state/101406-valkyrie-line-stage-preamp-info.html)

redrabbit 6th May 2007 09:55 PM

Valkyrie.... line-stage preamp..... info??
 
Anyone have links for this preamp?
I have built Jung's AD744/AD811 circuit found on his pages, but I wonder how this Valkyrie differs ?
The only info I've found is to order backissues from AudioXpress.
It was a project published there.

Quote:

Valkyrie. A line-stage preamplifier. Utilizes high-performance op amps in the signal path. Provides a modest voltage gain of about 5 (14dB), but can be increased.
AUDIO AMATEUR 1/1994 [Mar 1994] (v.25#1) pg. 10
Correction AUDIO AMATEUR 3/1994 [Sep 1994] (v.25#3) pg. 42
Added Info AUDIO AMATEUR 3/1994 [Sep 1994] (v.25#3) pg. 45
Correction AUDIO AMATEUR 2/1995 [Jun 1995] (v.26#2) pg. 45
Added Info AUDIO ELECTRONICS 3/1999 [Jun 1999] (v.30#3) pg.39
=RR=

Gordy 28th June 2007 10:10 AM

Anyone?

Mikett 28th June 2007 02:05 PM

Valkyrie
 
It is the essentially the same circuit. The Valkyrie adds buffers to the tape outputs etc and is not dual mono.

Gordy 29th June 2007 11:27 AM

OK.
Many thanks.

tiefbassuebertr 3rd January 2015 08:18 PM

I have follow questions concerning this:
1) Who can upload the schematic and the mentioned articles from post #1?
(maybe the Schema is according fig.7 from
http://waltjung.org/PDFs/Op_Amps_in_...ircuits_P2.pdf )
2) Which commercial line preamp uses this topology?
3) Are there measuring results at different cable loads resp. different capacity loads at the output ?
4) Are there RIAA phono stages in this basic topology?

Thank you for your help.

Only follow threads here on diyaudio I have discover to this topology:
http://www.diyaudio.com/forums/headp...p-designs.html
http://www.diyaudio.com/forums/pass-...ed-preamp.html

tiefbassuebertr 4th January 2015 09:01 AM

Quote:

Originally Posted by tiefbassuebertr (Post 4172428)
I have follow questions concerning this:
1) Who can upload the schematic and the mentioned articles from post #1?
(maybe the Schema is according fig.7 from
http://waltjung.org/PDFs/Op_Amps_in_...ircuits_P2.pdf )
2) Which commercial line preamp uses this topology?
3) Are there measuring results at different cable loads resp. different capacity loads at the output ?
4) Are there RIAA phono stages in this basic topology?

Thank you for your help.

Only follow threads here on diyaudio I have discover to this topology:
http://www.diyaudio.com/forums/headp...p-designs.html
http://www.diyaudio.com/forums/pass-...ed-preamp.html

an additional question rises up: who I can find a simlified schematic of the AD811?
one more URL in this case:
http://www.diyaudio.com/forums/solid...el-ad811s.html


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