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Old 7th January 2013, 04:14 PM   #201
data is offline data  Australia
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This thread on that amp may help you.
Autocostuire Fenice 20a & hiss problems
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Old 7th January 2013, 06:23 PM   #202
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Originally Posted by data View Post
This thread on that amp may help you.
Autocostuire Fenice 20a & hiss problems
Hey thanks for that, yep someone there mentions fitting 0.1u caps
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Old 10th January 2013, 12:53 PM   #203
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Originally Posted by Barbieboy View Post
Thanks that's useful to know, will make sure the writing on the caps ends in the direction of those wire connectors. Many thanks
The caps have arrived but the label wraps around !

(CCESA-0009)- 0.068uF 630Vdc Claritycap ESA Range polypropylene Hifi Collective
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Old 12th January 2013, 06:26 PM   #204
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Got the ClarityCap ESA's fitted, but have a low hum on the right channel. Any ideas ?

Click the image to open in full size.

Click the image to open in full size.

But ClarityCap use a thicker gauge wire so I had to drill out the holes

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Old 12th January 2013, 11:17 PM   #205
Hi_Q is offline Hi_Q  England
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Yikes! I couldn't do that, the caps look far too big but worth it I suppose if you get any improvement. Are the outsides covered with conductive foil? Just wondering if one of the sleeves on the right channel capacitors may be touching a heater wire and inducing hum into the signal. A wild guess I know but it would more likely be the 220nF. If the outsides are conductive, I would have thought a good idea would be to have a connection available to the outer covering so it could be grounded and act as a screen similar to the capacitors used in the Quad amplifiers. I get the impression that those are very much sought after.
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Old 12th January 2013, 11:24 PM   #206
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Ohhhh Les, man what a treat this little adventure has been regardless of the hum. Sonically very smooth and effortless, Gone is the GLARE, bags more detail with noticeable 3D. Bass dips deep and is far more punchy. And this, with only half an hour of burn in.

These caps for the cash rock. ClarityCap ESAs ;0
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Old 13th January 2013, 11:54 AM   #207
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Next stage is bypassing the volume pot and the input selector. Don't need these as I only have the one source with its own remote volume (Audiolab M-DAC).

My question being will this improve the sonics as at the moment the signal is running through two volume controls ?

Can someone also let me know if I have got the wiring correct please ! I am assuming that all I need do is run the L + R signals from the rear input plate to the front pre amp board here:

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Old 13th January 2013, 01:42 PM   #208
DF96 is offline DF96  England
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Quote:
Got the ClarityCap ESA's fitted, but have a low hum on the right channel. Any ideas ?
Physically large caps can pick up more hum and noise than smaller ones of the same value, because they have larger stray capacitance to nearby objects such as AC wiring and radio transmitters.
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Old 13th January 2013, 11:02 PM   #209
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Originally Posted by DF96 View Post
Physically large caps can pick up more hum and noise than smaller ones of the same value, because they have larger stray capacitance to nearby objects such as AC wiring and radio transmitters.
I see, pity about that, replaced caps on amps before in tighter places than this without any problems. Have moved them a bit only to make it worse

Any suggestions ?
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Old 14th January 2013, 05:13 AM   #210
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How about WIMA MKS? They should be about the same size with the blue ones.
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