Yet another 12B4 line stage, or is the 12B4 better than the Grounded Grid..... - Page 2

mach1 · 21st November 2005, 06:12 AM

Mark,

Great to see you took up the challenge !

planet10 · 21st November 2005, 08:36 AM

Mark,

Are those standoffs from a tek scope?

dave

Mark A. Gulbrandsen · 21st November 2005, 01:55 PM

Quote:

Are those standoffs from a tek scope?

Yes they are. Let us give a moment of silence in honor of that unknown TEK scope that allowed me to use its organs for a transplant.......BTW: Not scrapped out by me... jist so everyone here is clear on that issue

. Thats something I just couldn't bear to do.....

Mark

Brian Donaldson · 21st November 2005, 02:34 PM

And how about a 21 gun salute for the fine plug ins that lay down their life for my HP amp. http://cgi.ebay.com/ws/eBayISAPI.dll...MEBI%3AIT&rd=1

How can people commit such atrocities

planet10 · 21st November 2005, 04:39 PM

Quote:

Originally posted by Mark A. Gulbrandsen
honor of that unknown TEK scope

Mine was declared dead by Allen Wright before i made it parts... lovely beasts those.

dave

astouffer · 21st November 2005, 05:18 PM

I felt the same way about my tek scope until I tried doing any serious measurements and couldn't stop the drift. Then I thought about the calibration sticker on the front thats 40 years past due. Thats right it was due back in 1965. If you parted out a tek scope on ebay the price of the ceramic terminal strips alone could buy you a much newer model. Plus a 10Mhz scope is no good when an opamp oscillates at 40Mhz or so...

blaaberg · 21st November 2005, 08:47 PM

Hey,

I need a pre to my Zappulse class D poweramp. Could this one drive the 17kohm input, or maybee lower?

I too, woyld be glad to get a schematic of the Powersupply.

I`m absolutely a newbee, but would anyway try building a tube pre, and this one looked absolutely interesting.

Thanks to Mark for the great work :-)

Venlig hilsen Jan

Zen Mod · 21st November 2005, 10:28 PM

Quote:

Originally posted by Mark A. Gulbrandsen

Steve,

No offense, but I'm definately not a big fan of iron in the signal path. Its nice for once to listen to a really great piece of gear should I say unobstructed...... I can't see why you guys would want to add unnecessary stuff to it. Or please elaborate as to why.....

Mark

"signal energy preservation"

no RC stage can compete with inductive loaded stage in that field.

one need to hear good choke or OPT stage to catch what I mean ,but-like always -it's matter of taste ,not universal truth.

same as - one way speaker against multi way speaker -to each his own

apassgear · 21st November 2005, 11:58 PM

Bordin Sap on 12b4 - AV Review forum

"Now, I'm waiting for my tube pre-amp to finish from a hi-fi shop. Last month, by chance, I did A/B testing between my solid-state preamp with a DIY one, using 12B4 tubes. I was so stunning with the results. The 12B4 preamp produces the best sonics I've ever heard from a hi-fi system! Tons for details, musical separation, tonal balances, extreme high, authoritative bass, airy, and much more. Highs are a lot better than my solid-state preamp. I would say even better than my friend's Mark Levinson No. 383."

J Epstein · 22nd November 2005, 12:07 AM

Quote:

All three types of CD's were used in listening tests.

Country, Western, and what's the third?

-j

21st November 2005, 08:36 AM	#12
planet10 diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	Mark, Are those standoffs from a tek scope? dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

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21st November 2005, 06:12 AM	#11
mach1 diyAudio Member Join Date: Sep 2004 Location: Brisvegas	Mark, Great to see you took up the challenge !

21st November 2005, 02:34 PM	#14
Brian Donaldson diyAudio Member Join Date: Jan 2003 Location: Texas, Love it or leave it	And how about a 21 gun salute for the fine plug ins that lay down their life for my HP amp. http://cgi.ebay.com/ws/eBayISAPI.dll...MEBI%3AIT&rd=1 How can people commit such atrocities

21st November 2005, 05:18 PM	#16
astouffer diyAudio Member Join Date: Jun 2004 Location: Pittsburgh, crumbling wasteland	I felt the same way about my tek scope until I tried doing any serious measurements and couldn't stop the drift. Then I thought about the calibration sticker on the front thats 40 years past due. Thats right it was due back in 1965. If you parted out a tek scope on ebay the price of the ceramic terminal strips alone could buy you a much newer model. Plus a 10Mhz scope is no good when an opamp oscillates at 40Mhz or so...

21st November 2005, 08:47 PM	#17
blaaberg diyAudio Member Join Date: Jan 2005 Location: Denmark	Hey, I need a pre to my Zappulse class D poweramp. Could this one drive the 17kohm input, or maybee lower? I too, woyld be glad to get a schematic of the Powersupply. I`m absolutely a newbee, but would anyway try building a tube pre, and this one looked absolutely interesting. Thanks to Mark for the great work :-) Venlig hilsen Jan

21st November 2005, 11:58 PM	#19
apassgear diyAudio Member Join Date: Nov 2002 Location: Viña del Mar, Torreon	Bordin Sap on 12b4 - AV Review forum "Now, I'm waiting for my tube pre-amp to finish from a hi-fi shop. Last month, by chance, I did A/B testing between my solid-state preamp with a DIY one, using 12B4 tubes. I was so stunning with the results. The 12B4 preamp produces the best sonics I've ever heard from a hi-fi system! Tons for details, musical separation, tonal balances, extreme high, authoritative bass, airy, and much more. Highs are a lot better than my solid-state preamp. I would say even better than my friend's Mark Levinson No. 383."

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