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Old 22nd April 2013, 06:13 PM   #8861
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Quote:
Originally Posted by Bksabath View Post
At time you seems to confuse the actual act with fantasy
I hope so.

Ageless design and sound, don't blame my usual fetishes.

(You're that African gentleman who'll send me his youngest sister with a suitcase of cash over, right ? After I transfer funds for the administration costs. And you did say I get to keep the girl, in exchange for holding on to the suitcase for you ?)
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Old 22nd April 2013, 06:38 PM   #8862
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Yes, anti RIAA plus RIAA is linear phase. It is a kausal system. The phase distortion of the cutting amp is 100% compensated by the RIAA WHEN THEY HAVE THE SAME BUT OPPOSITE FREQUENCY RESPONSE AND NO ALL PASS TERM:
You can see that when you put in a 1kHz square, is comes out square.
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Old 22nd April 2013, 06:56 PM   #8863
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Over a "perfect" RIAA, say plus-minus 0.1dB from 10Hz to 100kHz you here basically the flaws of the cutting engine plus what is on the master tape.
There have being attempts to compensate the cutting lace, namely the " Neumann Pole ".
That is a first order rolloff of 3.3usec to protect the cutting head to overheat.
Unfortunately most heads are protected by a second order butterworth filter with -3dB at 50kHz so implementing the 3.3usec pole even worsens the problem.
I did a cutting head compensator with coils published on this thread some years ago that should extend response to over 100kHz but did get zero recognition, and so it goes.
People prefer to talk about the enormous differences between passive parts.
I can understand that, they know nothing about engineering so they grind their teeth on tertiary problems.
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Old 22nd April 2013, 07:07 PM   #8864
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Quote:
Originally Posted by jacco vermeulen View Post
I hope so.

Ageless design and sound, don't blame my usual fetishes.

(You're that African gentleman who'll send me his youngest sister with a suitcase of cash over, right ? After I transfer funds for the administration costs. And you did say I get to keep the girl, in exchange for holding on to the suitcase for you ?)
No me waiting and waiting for youngest sister as well was told that she was on banana ship direct to UK

They changed plan obviously and now that she is stopping there first me do not want her any more
She won't be good for much after I am sure...
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Old 22nd April 2013, 07:14 PM   #8865
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Quote:
Originally Posted by Joachim Gerhard View Post
Over a "perfect" RI AA, say plus-minus 0.1dB from 10Hz to 100kHz you here basically the flaws of the cutting engine plus what is on the master tape.
There have being attempts to compensate the cutting lace, namely the " Neumann Pole ".
That is a first order rolloff of 3.3usec to protect the cutting head to overheat.
Unfortunately most heads are protected by a second order butterworth filter with -3dB at 50kHz so implementing the 3.3usec pole even worsens the problem.
I did a cutting head compensator with coils published on this thread some years ago that should extend response to over 100kHz but did get zero recognition, and so it goes.
People prefer to talk about the enormous differences between passive parts.
I can understand that, they know nothing about engineering so they grind their teeth on tertiary problems.
Ha Neumann pole again
That was never a standard as Mr Neuman did have a few different versions on different lattes
so there could be an unspecified amount of difference depending on the late used.

What better to post the link here same time things happens on Mondays
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Old 22nd April 2013, 09:01 PM   #8866
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Quote:
Originally Posted by Joachim Gerhard View Post
Unfortunately most heads are protected by a second order butterworth filter with -3dB at 50kHz
Now there is something vinyl to lossless software should have some buttons for.
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Old 23rd April 2013, 02:04 AM   #8867
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Just for fun i put back in my tube phono after some modifications.
I had a 6dB subsonic filter in the input and took that away.
I added a second output to drive my current system that has an active cardiod bass.
The tube phono has enough gain to drive the system without preamp and i added a 1:16
Lundahl amorphous core transformer.
The sound i got is pretty amazing. Before the modification the tube phono sounded a bit warm, nice but not very punchy. Now it is quite the opposite, extremely open and dynamic. On par with my best transistor stages.
The combination of transformers and tubes rooks,
Attached Images
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File Type: jpg complete tube system.jpg (553.5 KB, 227 views)
File Type: jpg loud today.jpg (309.2 KB, 225 views)
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Old 23rd April 2013, 06:41 AM   #8868
FdW is offline FdW  Netherlands
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Quote:
Originally Posted by Joachim Gerhard View Post
... they know nothing about engineering so they grind their teeth on tertiary problems.
You can say it so beautifully and I do agree, totally.
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Old 23rd April 2013, 08:07 AM   #8869
grufti is offline grufti  United States
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Quote:
Originally Posted by Joachim Gerhard View Post
.....
I did a cutting head compensator with coils published on this thread some years ago that should extend response to over 100kHz.....
I would appreciate some help with this part of your message: I searched for this cutting head compensator long and hard with just about any word in your description and did not find it.
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Old 23rd April 2013, 11:03 AM   #8870
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It is a long time ago. Even i have to find it.
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