Omni Gon The Final Phonostage

MylesBAstor

Well-Known Member
Apr 20, 2010
11,236
81
1,725
New York City
image.jpg


image.jpg
 

astrotoy

VIP/Donor
May 24, 2010
1,547
1,017
1,715
SF Bay Area
I just went to Romy the Cat's website and Stitch, AKA Syntax posted the same Omnigon photos on October 29th. There were some questions about motive which he answers.

Larry
 

MylesBAstor

Well-Known Member
Apr 20, 2010
11,236
81
1,725
New York City
I just went to Romy the Cat's website and Stitch, AKA Syntax posted the same Omnigon photos on October 29th. There were some questions about motive which he answers.

Larry

Yes I think the same questions were raised here too. Otherwise cat's got my tongue.
 

Reinhard

Well-Known Member
Mar 24, 2012
98
30
925
germany
Evocator

Hello,

someone here with Information on the new Avocator Phonostage from Acoustical Systems (Brakemeier)

Any Info, pics etc are welcome,

Reinhard
 

CSL

Well-Known Member
Apr 22, 2012
28
5
908
Snakeoil and audiophiles

Hello,


someone here with Information on the new Avocator Phonostage from Acoustical Systems (Brakemeier)

Any Info, pics etc are welcome,

Reinhard


Do not trust Daniel or whatever name using. read below the many swindled. Never know for sure parts or warranty.
he is simply dishonest.
 
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XV-1

Well-Known Member
May 24, 2010
3,591
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Sydney
Considering Dietrich sells all his products through distributors and dealers, there can be no such worries. He has been operating the last 4 years or so quite successfully it would seem with no issues with product or service. I certainly know the Aussie distributor has had no problems.


I saw the Avocator phono in HK in August. It looked very impressive and build quality was excellent, however I was more interested in the giant monolith that was his turntable.

from M&S
Something new is coming from Dietrich Bakemeier and Acoustical Systems team. The EVOcator is Acoustical Systems’ all new full-feature reference tube RIAA phono stage implementing PTFE-circuit boards gel-cushioned for vibration isolation, pure silver foil in oil capacitors, premium grade triodes...

“With the EVOcator we complete our product portfolio as it was the last major component "missing" in the all analog front end chain.”

The EVOcator all-triode-tube reference RIAA phono stage features:

· full feature 4 phono inputs – RCA and balanced - w/3 selectable gain stages for MC
· 2 outputs – RCA and balanced – 600 Ohms studio pro standard
· front panel selectable load for capacitance and impedance for MI and MM
· front panel selectable load impedance for MC inputs
· front panel selectable phono phase 0° and 180° inverted
· front panel selectable Mono / Stereo
· separate power supply with tube rectification and
· DC tube regulated plate supply
· Selectable grounding route for zero hum
· Operates 100 to 250 V ac line – 50Hz and 60 Hz
· Highest quality connections: WBT (RCAs), Eichmann (RCAs choice) Furutech (IEC socket and XLR (choice)), Lemo (power supply to phono stage).

Made with PTFE-circuit boards gel-cushioned for vibration isolation, pure silver foil in oil capacitors, premium grade triodes, top-class RCA and XLR connectors and entirely non-magnetic high dampened alloy cabinets.

Entirely designed and made in Germany.

Acoustical_Systems_EVOcator_review_matej_isak_2016_2017_mono_and_stereo%u00252B-%u00252B1.jpg

Acoustical_Systems_EVOcator_review_matej_isak_2016_2017_mono_and_stereo%u00252B-%u00252B2.jpg
 

Reinhard

Well-Known Member
Mar 24, 2012
98
30
925
germany
Hello,

thank you, any pics from inside available? Tube complement? Silver Oil are Mundorfs? Transfos are Jensen? Lundahl?

Price of the maschine?

Regards, Reinhard
 

XV-1

Well-Known Member
May 24, 2010
3,591
2,574
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Sydney

asb

Well-Known Member
Apr 17, 2017
43
12
138
Here we have a scope screen shot of the output voltage (RCA socket) of an "Omnigon" preamp,
both channels. The output on XLR is the same, this is no balanced output. The pic was taken on
a phono input, but with line it is essentially the same. Frequency was 1 kHz. Output was loaded
with the scope only, 1 meg. What you see is independent of volume setting and input level (if
below clipping). Sorry for bad picture quality, I was in a hurry.
 

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asb

Well-Known Member
Apr 17, 2017
43
12
138
So this item is load dependent ?
No cathode follower or something ?
(I expected a reply like this)
 

Reinhard

Well-Known Member
Mar 24, 2012
98
30
925
germany
I Think he is using a transformer volume control as Output.
No idea how he drives it. Cathode Follower? Parafeed?
 

bazelio

Well-Known Member
Sep 26, 2016
2,493
1,745
345
California
The ringing is probably an influence of the scope probe. As a first guess, try removing the ground lead, assuming it was connected.

Drats, my phono stage wasn't inspected by a university lab. :confused:
 

asb

Well-Known Member
Apr 17, 2017
43
12
138
Gentlemen,
yes, this preamp has an "inductive" volume control (but not at the output - who would do it this way?).
The strong ringing is mainly caused by this.
There is no transformer or choke loaded output, this is an RC coupled amplifier.
No speculation and "first guess" - facts please.
No "scope probe" used here, but direct RCA plugs and cables.
How would you manage to get a ringing like this with an ordinary or special probe ?
Please show us.
Thanks.
 
Last edited:

ALF

Well-Known Member
Mar 15, 2012
531
243
955
Southwest
Gentlemen,
yes, this preamp has an "inductive" volume control (but not at the output - who would do it this way?).
The strong ringing is mainly caused by this.
There is no transformer or choke loaded output, this is an RC coupled amplifier.
No speculation and "first guess" - facts please.
No "scope probe" used here, but direct RCA plugs and cables.
How would you manage to get a ringing like this with an ordinary or special probe ?
Please show us.
Thanks.
Ah, sorry to read, it appears that you have the Bavarian problem...
 

bazelio

Well-Known Member
Sep 26, 2016
2,493
1,745
345
California
Gentlemen,
yes, this preamp has an "inductive" volume control (but not at the output - who would do it this way?).
The strong ringing is mainly caused by this.
There is no transformer or choke loaded output, this is an RC coupled amplifier.
No speculation and "first guess" - facts please.
No "scope probe" used here, but direct RCA plugs and cables.
How would you manage to get a ringing like this with an ordinary or special probe ?
Please show us.
Thanks.
The photo in post #131 looks like an analog scope trace. Is it not so? A typical passive scope probe forms a resonant circuit and can influence the measured result. This isn't a controversial statement. I was simply offering an idea.
 

asb

Well-Known Member
Apr 17, 2017
43
12
138
"The Bavarian problem" - not sure what kind of disease this is ..
"A typical passive scope probe forms a resonant circuit" - is not
correct and a probe was not used, see post 136.
"With 600 Ohms Output?" - a thorough analysis of the amplifier
would be possible if somebody paid for it, I was just paid for repair.
 

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