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replace electrolytic capacitors with solid state, Do i need to replace capacitors on a like for like basis?
john11
post Dec 21 2012, 06:22
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Hi and thanks for reading this post.

Do you think it would be a good idea to replace the usual aluminium electrolytic capacitors on a Zero dac board for the better specs of a solid state (polymer) type capacitor.

I have a Zero dac which reproduces digital sound signals from my pc's usb port and it has 4 aluminium electrolytic's around the dac chip (47uf 35v) which are swollen and leaking and 4x 10uf 63v output coupling caps in the analog section, so 8 caps to replace in all, do you think a like for like replacement of the stock aluminium electrolytics for solid state polymer type caps would be okay in this situation.

I have done a google search and people have performed this on pc motherboards but there is not much on other types of equipment.

Many thanks in advance. John.
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john11
post Dec 28 2012, 04:05
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Hi. Thanks for the replies.

I saw on the amp board quite a few diodes probably for biasing voltages and was wondering if these are worth replacing

with something better, fast diodes, schottky?

Have you had any experience of these.

Many thanks in advance. John.
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Glenn Gundlach
post Dec 28 2012, 04:24
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QUOTE (john11 @ Dec 27 2012, 19:05) *
Hi. Thanks for the replies.

I saw on the amp board quite a few diodes probably for biasing voltages and was wondering if these are worth replacing

with something better, fast diodes, schottky?

Have you had any experience of these.

Many thanks in advance. John.


Biasing diodes have specific Voltage vs. temperature characteristics. There is nothing 'better', just different which could require altering other components to compensate for the changes. They are not run in reverse and do not switch so there is nothing to be gained by changing them - unless they have failed.

Sometimes quieter / faster opamps CAN make improvements but not always and can even sometimes degrade performance. I've changed AN6552 amps to OPA2134 units in an old Technics receiver with no downside. The question is, does it sound better? In all honesty I can't say one way or the other. I 'feel' better about it and it measures a little better. Changing the center frequencies of the lower 2 bands of the built in a 5 band graphic equalizer was indeed an improvement. it was 80 Hz / 320 Hz and it's now 25 Hz / 180 Hz. It's very easy to retune gyrator circuits.

G
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Soap
post Dec 28 2012, 16:19
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QUOTE (Glenn Gundlach @ Dec 27 2012, 22:24) *
Changing the center frequencies of the lower 2 bands of the built in a 5 band graphic equalizer was indeed an improvement. it was 80 Hz / 320 Hz and it's now 25 Hz / 180 Hz. I


Holy smokes! Not to drag this off topic but you moved the center to 25Hz? I rather suspect I'd like whatever you have as a sub!


--------------------
Creature of habit.
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Glenn Gundlach
post Dec 28 2012, 20:11
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QUOTE (Soap @ Dec 28 2012, 07:19) *
QUOTE (Glenn Gundlach @ Dec 27 2012, 22:24) *
Changing the center frequencies of the lower 2 bands of the built in a 5 band graphic equalizer was indeed an improvement. it was 80 Hz / 320 Hz and it's now 25 Hz / 180 Hz. I


Holy smokes! Not to drag this off topic but you moved the center to 25Hz? I rather suspect I'd like whatever you have as a sub!


Electrostatic headphones and 32 foot stops on pipe organs.

Happy New Year

G
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Posts in this topic
- john11   replace electrolytic capacitors with solid state   Dec 21 2012, 06:22
- - Speedskater   I don't think that many people are familiar wi...   Dec 21 2012, 23:09
- - saratoga   The ESR won't be quite the same since the chem...   Dec 22 2012, 02:02
- - Dynamic   I'd have thought they'd be power supply sm...   Dec 22 2012, 04:26
|- - Glenn Gundlach   QUOTE (Dynamic @ Dec 21 2012, 19:26) I...   Dec 22 2012, 10:18
|- - Dynamic   QUOTE (Glenn Gundlach @ Dec 22 2012, 09:1...   Dec 22 2012, 17:03
- - Arnold B. Krueger   QUOTE Do you think it would be a good idea to repl...   Dec 22 2012, 15:49
- - john11   Hi. Thanks for the replies. You are absolutely ri...   Dec 24 2012, 09:16
|- - Glenn Gundlach   QUOTE (john11 @ Dec 24 2012, 00:16) Hi. T...   Dec 24 2012, 10:53
|- - Arnold B. Krueger   QUOTE (john11 @ Dec 24 2012, 03:16) Hi. T...   Dec 24 2012, 13:49
|- - Glenn Gundlach   Arny, try a Metcal and I ASURE you you'll have...   Dec 25 2012, 08:20
|- - Arnold B. Krueger   QUOTE (Glenn Gundlach @ Dec 25 2012, 02:2...   Dec 25 2012, 13:59
|- - Glenn Gundlach   QUOTE (Arnold B. Krueger @ Dec 25 2012, 04...   Dec 25 2012, 22:46
- - john11   Hi. Thanks for the replies. Can anyone support Gl...   Dec 25 2012, 08:37
|- - Glenn Gundlach   QUOTE (john11 @ Dec 24 2012, 23:37) Hi. T...   Dec 25 2012, 09:18
|- - Glenn Gundlach   Sorry about the extra post. How do you delete?   Dec 25 2012, 09:20
- - john11   Hi. Thanks for the replies. I saw on the amp boar...   Dec 28 2012, 04:05
- - Glenn Gundlach   QUOTE (john11 @ Dec 27 2012, 19:05) Hi. T...   Dec 28 2012, 04:24
|- - Soap   QUOTE (Glenn Gundlach @ Dec 27 2012, 22:2...   Dec 28 2012, 16:19
|- - Glenn Gundlach   QUOTE (Soap @ Dec 28 2012, 07:19) QUOTE (...   Dec 28 2012, 20:11
- - Arnold B. Krueger   QUOTE (john11 @ Dec 27 2012, 22:05) Hi. T...   Dec 28 2012, 15:05


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