Author Topic: new Duelund Alexander caps  (Read 16501 times)

Offline kajak12

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Re: new Duelund Alexander caps
« Reply #20 on: July 29, 2011, 06:41:30 PM »
I guess you need 2? one for each channel
still discovering the link between electronics and audio reproduction.so much to learn and so little time

Offline ozcal

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Re: new Duelund Alexander caps
« Reply #21 on: July 30, 2011, 01:37:33 PM »
Yep one for each chn.
Listening with my ears :)

Offline kajak12

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Re: new Duelund Alexander caps
« Reply #22 on: July 30, 2011, 02:55:23 PM »
Yep one for each chn.
i have only one 1k resistor in stock the last pair i used for i/v conversion on a dac
still discovering the link between electronics and audio reproduction.so much to learn and so little time

Offline ozcal

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Re: new Duelund Alexander caps
« Reply #23 on: July 30, 2011, 04:49:44 PM »
No worries Mario , I 'll pick up something from hfc whn I have the cash.
Have you tried the Amtrans carbons yet ?
Listening with my ears :)

Offline Jehuty

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Re: new Duelund Alexander caps
« Reply #24 on: July 30, 2011, 10:26:46 PM »
Hi ozcal,

I found this on eBay:
1 ALLEN BRADLEY Carbon Comp Resistor RCR 1k 5% 2 watt, linky: http://www.ebay.com.au/itm/1-ALLEN-BRADLEY-Carbon-Comp-Resistor-RCR-1k-5-2-watt-/390002718939?pt=LH_DefaultDomain_0&hash=item5acdf938db

Cheers,
William
Not all that matters can be measured, not all that can be measured matters.

Offline ozcal

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Re: new Duelund Alexander caps
« Reply #25 on: August 01, 2011, 05:38:01 PM »
Thnaks William , will look into those.
Gordon
Listening with my ears :)

Offline ozcal

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Re: new Duelund Alexander caps
« Reply #26 on: August 02, 2011, 07:08:21 PM »
Hi guy's just another quick update. I replaced my home made twisted pair solid core interconnects with varnish insulation with some Linn standard interconnects and the wireyness in the sound has been greatly reduced with no easily apparent downside.
Listening with my ears :)

Offline ozcal

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Re: new Duelund Alexander caps
« Reply #27 on: November 25, 2011, 06:09:15 PM »
Well I have now percivered with the Deulands for 6 months or so and the wireyness is still there.
Today ,I ordered a pair of AMPOHM CU in oil .The pre amp will now run all Ampohms in the head unit.
Shame really as the Deulands do so much so well ,guess they are just not a good fit in that position in the Supratek.
Will let you know how the Ampohms go.
Listening with my ears :)

Offline kajak12

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Re: new Duelund Alexander caps
« Reply #28 on: November 25, 2011, 09:55:50 PM »
Well I have now percivered with the Deulands for 6 months or so and the wireyness is still there.
Today ,I ordered a pair of AMPOHM CU in oil .The pre amp will now run all Ampohms in the head unit.
Shame really as the Deulands do so much so well ,guess they are just not a good fit in that position in the Supratek.
Will let you know how the Ampohms go.
What is wireyness?
still discovering the link between electronics and audio reproduction.so much to learn and so little time

Offline data

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Re: new Duelund Alexander caps
« Reply #29 on: November 25, 2011, 11:41:50 PM »
I'm also interested in "Wirey-ness" or however it is termed, haven't heard the term before.

Gordon, is it an edgy-ness? a sharp leading edge or something?

Offline ozcal

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Re: new Duelund Alexander caps
« Reply #30 on: November 26, 2011, 01:32:27 PM »
That's the problem with trying to describe sound in words ;D
Data , I guess edginess is a good description too. It is most apparent on vocals.
Hardness in the upper mids would also be a good descrition.
Anyway , the Ampohms should be here next week and we will see how things go.
Otherwise the system is sounding the best it ever has so if I can get this issue sorted I can start to focus on building a new hi-res dac to compliment the Satch.
Listening with my ears :)

Offline data

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Re: new Duelund Alexander caps
« Reply #31 on: November 26, 2011, 02:20:11 PM »
Thanks mate, I understand now :)

Been considering them as coupling caps for my amp, so looking at views on them.

Will definitely be interesting to see how ampohm's fair...Fingers crossed they are just the ticket for the supratek.

Offline zenelectro

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Re: new Duelund Alexander caps
« Reply #32 on: November 26, 2011, 03:34:35 PM »
That's the problem with trying to describe sound in words ;D
Data , I guess edginess is a good description too. It is most apparent on vocals.
Hardness in the upper mids would also be a good descrition.
Anyway , the Ampohms should be here next week and we will see how things go.
Otherwise the system is sounding the best it ever has so if I can get this issue sorted I can start to focus on building a new hi-res dac to compliment the Satch.

So the big question is do he Duelunds show something that is maybe actually in the pre amp or is the
wireyness the Duelunds themselves.

This is always problem of system / product development - is it chicken or egg.

T
 



Offline ozcal

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Re: new Duelund Alexander caps
« Reply #33 on: November 26, 2011, 03:41:34 PM »
That's the problem with trying to describe sound in words ;D
Data , I guess edginess is a good description too. It is most apparent on vocals.
Hardness in the upper mids would also be a good descrition.
Anyway , the Ampohms should be here next week and we will see how things go.
Otherwise the system is sounding the best it ever has so if I can get this issue sorted I can start to focus on building a new hi-res dac to compliment the Satch.

So the big question is do he Duelunds show something that is maybe actually in the pre amp or is the
wireyness the Duelunds themselves.

This is always problem of system / product development - is it chicken or egg.

T
 



My thoughts exactly Z. Others have reported excellent results with the Alexanders but their equipment and applications are different to mine , so still no further ahead really :)
Listening with my ears :)

Offline data

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Re: new Duelund Alexander caps
« Reply #34 on: November 26, 2011, 03:44:33 PM »
I'm with Zen' on this, I'm thinking that the edginess is not being produced by the caps, and the culprit is to be found elsewhere.

Hang onto those caps Ozcal, and see if you can find the real criminal!

Edit:Oops...didn't see ya' post mate :)

I have some Chinese Mil' surplus caps in my amp and have thought them a bit too veiled and dark, was going to replace them soon, but found that the hookup wire I used to connect them was the offender (1mm copper...what was I thinking!), change it to 24 gauge Neotech copper and I have my detail back!
« Last Edit: November 26, 2011, 03:50:42 PM by data »

Offline ozcal

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Re: new Duelund Alexander caps
« Reply #35 on: November 26, 2011, 03:47:38 PM »
Thanks mate, I understand now :)

Been considering them as coupling caps for my amp, so looking at views on them.

Will definitely be interesting to see how ampohm's fair...Fingers crossed they are just the ticket for the supratek.
The main caps : running from the valve ouput to the transformers are already Aohm cu in oil and they provided an improvement in tonality compared to the Stock Auricaps.
If the  second set of Aohms replacing the Alexanders make the sound too warm , slow or mushy then I still have the Auricaps to pop back in that position.
The combo of Ampohm between valave and output trafo and Auricap between valve and gain switch did seem to work well.
Listening with my ears :)

Offline data

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Re: new Duelund Alexander caps
« Reply #36 on: November 26, 2011, 03:52:24 PM »
Call me mad....... but could the offending edginess be caused by something other than caps?

Edit: Changing the cap mix might be compensating for it, but maybe it would be better to find the cause and cure it....(change/alter the offender)
« Last Edit: November 26, 2011, 03:55:24 PM by data »

Offline ozcal

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Re: new Duelund Alexander caps
« Reply #37 on: November 26, 2011, 04:24:57 PM »
I am sure it could be caused by something else Ian , where should I look?
The problem was not noticeable / there b4 the Alexanders went in.
Chicken and egg , indeed  :D
Listening with my ears :)

Offline data

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Re: new Duelund Alexander caps
« Reply #38 on: November 26, 2011, 05:16:56 PM »
Yeah, the new caps are more like a piece of wire (as close as one can be, apart from the cast variety I guess), and is showing something that was hidden by the previous caps.

You will find the culprit, and be able to enjoy those lovely caps :)

So before the Supra' so maybe the interconnects, or as you suspect, the DAC .

Edit:The Duelunds are doing input duties in the pre, are they not?
« Last Edit: November 26, 2011, 05:21:27 PM by data »

Offline ozcal

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Re: new Duelund Alexander caps
« Reply #39 on: December 20, 2011, 06:52:12 PM »
Well the Ampohms arrived today , swapped out the Alexanders and the wireyness has gone. Tone is warmer but detail and timbral res. have improved.
Guess the Alexanders were just not a great match for the rest of the system.
Now to start work on the dac upgrades. New case like OZmillsy's has arrived as have some Shinko tantalum resitors and silver mica caps for the discrete I/V 'stage'.
Still waiting on some caps from Lukasz before I begin the transplant to the new case.
G
Listening with my ears :)