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Old 29th December 2009, 05:22 AM   #11
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Good, I'm going to give it a try! Thank you
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Old 2nd January 2010, 11:31 AM   #12
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Default Duhhhh

Quote:
Originally Posted by ThorstenL View Post
Hi,

Let me answer this on Brian's behalf.



In principle - yes. However, the Obbligato capacitors are physically much larger and may be a challenge to fit.

Also, to be honest, a value of 47uF is overkill. If the input impedance of your Amplifier/Preamplifier is for example 10Kohm a coupling capacitor of 2.2uF is sufficient ( ~ 7hz -3dB point). So 47uF can support the same LF extension for a 500 Ohm load, which may not be needed in your case.

From experience, small value & size (Film) capacitors have small sonic problems, big ones have big problems.

However with electrolytic capacitors a value of as much as 100 times the minimum can be beneficial, as they are subject to electrochemical processes which cause audible (and measurable) distortion, which seems to reduce with larger values and has been shown to be lower in certain audio grade capacitors (Elna Cerafine & Elna Silmic) compared to standard units of the same value.



We have not tried this, but based on the construction of the Obbligato Capacitors I tend to doubt it.

In closing I would suggest to try the smallest value capacitor that will give sufficient low frequency response for your actual Amplifier/Preamplifier. With a 4.7uF Capacitor you are fine for loads down to 5KOhm, which is as low as I would sensibly expect, so I would recommend this unless you have really good reason's why a larger value is needed.

Kind regards Thorsten
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Old 7th January 2010, 11:57 AM   #13
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Thanks Thorsten, the Film Cap replacement gives immediate rewards on every sonic aspect, better textures and fullier bodies, less fatigue sounding, great seperation and sound stage.

And thanks for Brian for bringing Obbligato to market for such great value cap, especially the pricing of film audio cap were quite pricey and bulky for such large value over 10uF, Obligato strike the right balance for me (far cheaper than Auricap and similar pricing as MCap MKP but sounding more superior.)
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Old 23rd January 2010, 05:46 AM   #14
ERO is offline ERO  United States
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Default 120v motor for Linn Basik?

Recently moved to the US with a Linn Basik UK spec (220v 50hz). Need to convert it to US spec (120v 60hz). Linn UK claim not to have any more 120v motors. Any ideas on suitable replacements? Thanks for your ideas.
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Old 23rd January 2010, 07:32 AM   #15
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I know nothing about Linn Basic but wouldn't a transformer be an easier solution than replacing the motor?
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Old 23rd January 2010, 08:54 PM   #16
ERO is offline ERO  United States
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Thanks for commenting, analog_sa. Would that it were that easy. The voltage in the States is 120v at 60hz, whereas the voltage in Europe is 240v at 50hz, so a transformer is not the answer to the problem, due to the speed/cycle issues.

At the same time, I'm slightly wary of expending too much time and effort on this, as the turntable wasn't hugely expensive in the first place, and the arm/cartridge are of course salvageable. It may well be the cheapest option simply to pick up a 120v turntable without arm. Seems a shame, though.
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Old 26th January 2010, 10:37 PM   #17
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Default 22000uf CAPACITORS

Hi can any body recomend a shop for some 22000uf 63v or above for a fair price thay are for the power rail on my DR THOMAS power amp or if any body a 2 for sale
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Old 26th January 2010, 10:55 PM   #18
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It might be cheaper going for multiple 10,000 63V as they are more available.
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Old 26th January 2010, 11:05 PM   #19
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Digikey carries the ever popular pana ecg in a 22mF
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Old 27th January 2010, 10:29 AM   #20
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Hi all thanks for replies i have thought about 2 10000uf instead being new to diy hifi the caps that are in are much biger than the ones available but this power amp was made in the 80s. Does the size matter as long as thay are the same spec
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