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Old 18th April 2010, 04:54 PM   #3581
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Ricardo,

I suppose that high current left me hear more clear the capacitor noise, so is the reason that I like better without capacitor with the only penalty of less gain.
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Old 18th April 2010, 07:50 PM   #3582
RCruz is offline RCruz  Switzerland
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So I got it right !
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Old 19th April 2010, 12:17 PM   #3583
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Yes.
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Old 19th April 2010, 02:42 PM   #3584
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Thumbs up Test record

@Salas

Received the test record last friday, now I know the Fs of mine Ekos arm / Denon DL103R cart is 8Hz (I see how dance the cart), very good test record to setup the TT

Thanks for the input.
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Old 19th April 2010, 02:57 PM   #3585
Salas is offline Salas  Greece
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See with your DVM at ACmV the 1kHz groove readings at both channels output.
That will include cart's channel agreement error too. If it is more than 0.5dB difference we can change the first stage Rs value on one channel, to focus the real set up dead center.
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Old 19th April 2010, 05:09 PM   #3586
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I have to use the SIDE TWO Band 2, the same I used to know the Fs?
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Old 19th April 2010, 07:52 PM   #3587
Salas is offline Salas  Greece
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There is a pink noise L/R which is good for that mV steady output measurement, plus only left and only right. Maybe first side 4th and on if I remember correctly, me I have the Telarc Omni, but its not available, only as collector's in silly prices on epay. Look at the track list. There were 300Hz tones too I think, maybe 1k also, not sure.
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Old 19th April 2010, 08:30 PM   #3588
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Link:

HFN 002 | A Review of the HiFi News Test Record | Vinyl Engine

Click the image to open in full size.

Side One
Band 1
Channel Identification Voice on left channel then voice on right channel

Always had an uncomfortable feeling that your channels where wired the wrong way around? This will let you know.

Band 2
Phasing (voice alternately in phase and out of phase)

This track is to help determine if the polarity of the wiring in your system is correct. This is very important for bass response and imaging and the effect can be clearly heard and adjustments made if necessary. You may be suprised just how much this effects the sense of spaciousness and depth in a recording.

Bands 3 + 4 + 5
Channel Balance (-20db pink noise L+R/ L only / R only)

Allows a 'subjective evaluation of your system' in which the sound should be smooth and seamless. Use for setting channel balance before getting to the Bias setting tracks.

Bands 6 + 7 + 8
Bias setting (300Hz tone L+R at +12dB / +14dB / +16dB)

These tracks are for setting anti-skate. If the 300Hz test tone is heard distorting or buzzing on either channel then your 'anti-skate' or 'bias compensation' should be adjusted to compensate. Most cartridges seem to sail through the first track regardless, but fine tuning will be needed to successfully complete the 14db and 16dB tracks. Increasing VTF towards the top end of the cartridge manufacturers scale can improve tracking here.

It's interesting to note that advanced stylus profiles like the Gyger S on the Goldring 1042 have a smaller 'sweet spot' during bias adjustment . A Goldring 1006 and Audio Technica AT110E where equally indifferent to bias setting over a larger range of the scale and where unable to track the final band as well the 1042.

Band 9
Bias setting (300Hz tone L+R at +18dB)

The famous torture track - just another 2dB rise over band 8 but this is very difficult for a cartridge to track cleanly. If you've got through this far with reasonable results then consider this a test of your cartridges suspension design and tonearm control.

Click the image to open in full size.

Side Two
Bands 1 + 4 + 8
Tracking ability (300Hz L+R at +15dB)

Three identical tracks to test the consistency of arm performance across the record. Use these to check the final setting of your anti-skate and tracking force and then readjust if necessary so that all three track evenly with no distortion. Experience has shown that correct operation here assures good 'real world' results with 99% of recordings.

Band 2 + 3
Cartridge/Arm Lateral/Vertical resonance test (sweep)

These give a visual indication of the resonant frequency of your arm / cartridge combination. When the cartridge suspension becomes excited there is an obvious 'wobble' of the stylus and the pilot tone warbles. You are aiming for a reading of 8-15Hz and applying tonearm damping can help here if your cartridge is a mismatch for the arm.

Band 5
Cartridge alignment (azimuth) test (300Hz L+R +6dB)

This track is designed for cartridge Azimuth adjustment. To check the stylus is absolutely vertical, play the track in stereo and you should get identical output from each speaker, but when the amplifier is switched to mono you will hear nothing.

Band 6
Residual system noise (unmodulated grooves)

Unmodulated grooves which when played at normal listening levels will pick up any noise in your system such as rumbling bearings or poor plinth design. This was absolutely silent on both my sprung chassis Systemdek and Obsidian plinthed SP10 (bar the odd click and pop) so no problem there.

Band 7
Full range frequency system check (20Hz -20KHz L+R)
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Old 19th April 2010, 09:21 PM   #3589
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Side one, tracks 3,4,5. -20dB pink not too strong but should give reading. Also side two band 5 which is strong and single frequency. If it will match close enough both in weak and strong, its a very good result. The anti skating should be OK first.
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Old 19th April 2010, 09:31 PM   #3590
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Quote:
Originally Posted by Salas View Post
See with your DVM at ACmV the 1kHz groove readings at both channels output.
That will include cart's channel agreement error too. If it is more than 0.5dB difference we can change the first stage Rs value on one channel, to focus the real set up dead center.
Sorry for newbie question: have I to read with the DVM ACmV between signal & ground in each channel to check if there is differences right?
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