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Old 16th August 2003, 05:38 AM   #11
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Join Date: Dec 2001
Location: SIUE, Illinois, USA
aren't silver-mica capacitors usually physically identifiable? i mean i've seen a lot that look well, identifiable!

and isn't silver-mica microphonic?

also, i think the 100nf caps are supposed to be located as physically close to the power IC (or opamp in case of pre-amp filtering) as possible. pretty sure caps with good high-frequency preformance are reccomended for this type of supply fitlering.
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Old 16th August 2003, 09:23 AM   #12
hacknet is offline hacknet  Singapore
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if thats the case...i`ll probably go with the naked cap...

good choice?
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Old 16th August 2003, 11:13 AM   #13
Previously: Kuei Yang Wang
 
Join Date: Nov 2002
Konnichiwa,

Quote:
Originally posted by theChris
aren't silver-mica capacitors usually physically identifiable? i mean i've seen a lot that look well, identifiable!
I'd say so.

Quote:
Originally posted by theChris
and isn't silver-mica microphonic?
Actually much less than most other capacitors.

Sayonara
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Old 16th August 2003, 02:22 PM   #14
hacknet is offline hacknet  Singapore
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just a silly question.

i have a spare 100k log pot lying around. can i use it or has it have to be a linear taper one?

is there any significance the the nature of the application?
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Old 16th August 2003, 02:29 PM   #15
Previously: Kuei Yang Wang
 
Join Date: Nov 2002
Konnichiwa,

Quote:
Originally posted by hacknet

i have a spare 100k log pot lying around. can i use it or has it have to be a linear taper one?
You CAN use a log pot, but you will have failry little usable volume control range.

Quote:
Originally posted by hacknet

is there any significance the the nature of the application?
You mean apart form the simple observation that linear track pots invariably sound better than their log counterparts and the usable volume control range? Apart from these, no.

Sayonara
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Old 16th August 2003, 02:44 PM   #16
hacknet is offline hacknet  Singapore
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thanks Kuei Yang Wang....

i will be proceeding with the IGC ... should start work on the 1st week of september.... now i`m shopping around for parts

Thanks again!
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Old 16th August 2003, 03:00 PM   #17
hacknet is offline hacknet  Singapore
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Default Re: Re: Silver Mica de-coupling caps

sorry, one more question...

Quote:
Originally posted by Kuei Yang Wang

Input resistor 15k, 18k from input to ground (across the RCA).

is the input resistor refering to the 10k in series with the 2.2uF cap or the pot?

what should the ideal value of the pot be?

sorry for this silly question....
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Old 16th August 2003, 03:05 PM   #18
Previously: Kuei Yang Wang
 
Join Date: Nov 2002
Default Re: Re: Re: Silver Mica de-coupling caps

Konnichiwa,

Quote:
Originally posted by hacknet

is the input resistor refering to the 10k in series with the 2.2uF cap or the pot?
Yes.

Quote:
Originally posted by hacknet

what should the ideal value of the pot be?
No pot. The 18k+15k arrangement is for use as Power Amplifier (without Volume control). As integrated Amp (with Volume Control) use a 100k linear law Pot and a 10k Input resistor as directed.

Sayonara
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Old 16th August 2003, 06:01 PM   #19
Tor M is offline Tor M  Norway
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Default Re: Re: Silver Mica de-coupling caps

Quote:
Originally posted by Kuei Yang Wang
Preferred Pot types are Cermet from Vishay/Sfernice or ANY Carbon track ones, but preferably old hotmolded AB, Copal etc. - choose to taste, Cermet "precise" and "clean" and "neutral" while Carbon "musical" and "warm" and "romantic" (read a little fuzzy in a nice way).

Hi!
Are theese something like the Vishay pots you are recommending?

http://international1.farnell.com/Se...rm_inone.jhtml


Thanks.

Tor Martin
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Old 16th August 2003, 07:53 PM   #20
Previously: Kuei Yang Wang
 
Join Date: Nov 2002
Default Re: Re: Re: Silver Mica de-coupling caps

Konnichiwa,

Quote:
Originally posted by Tor M


Are theese something like the Vishay pots you are recommending?
No Idea, the URL does not bring up a product....

Sayonara
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