The sound of parts - Page 16

HDTVman · 18th December 2002, 05:41 PM

Did you guys still interested or are you thinking about it?

Later
Bruce

dorkus · 18th December 2002, 06:02 PM

i'm still thinking about the circuit, and how we're gonna wire it up. need to think out the details.

anybody have parts suggestions for the tweak circuit? i'm thinking Hovland feedback cap, Black Gate coupling cap, maybe Caddock MK132 resistors... for the cheapo version, i think we should use "crappy" metal films. those Radio Shack carbon films actually don't sound so bad.

SY · 18th December 2002, 06:35 PM

Carbon comps or crappy metal films, sure. Japanese e'lytics for high value caps, cheezy Mylars for low value. Silver mica for very low value.

dorkus · 18th December 2002, 06:37 PM

silver mica is actually pretty nice stuff. but we only need two caps - .22uF film and 10uF 'lytic. i'm not sure what to use for internal wiring, i like Cardas litz but it's harder to work with. any decent solid core with non-PVC insulation will do.

oh yeah, we need a couple larger 'lytics for the power supply bypass. i like Nichicon Muse or Elna Cerafine/Silmic. i hear OSCON is good too but i don't have any.

fdegrove · 18th December 2002, 06:40 PM

Hi guys,

Just a little suggestion I'd like to make for the crappy unit:

throw in a couple of resistors with magnetic leadout wires?

Preferably either in series with the signal or as load resistors.

Cheers,

dorkus · 18th December 2002, 06:41 PM

yes, i was thinking steel endcaps and lead wires. i believe Yageo resistors from Digikey are magnetic, i will check.

HDTVman · 18th December 2002, 06:51 PM

I have to go see the Doc this afternoon so I'll talk to you guys later. I'm thinking the simplest possible active circuit would be the best choice, a CCS follower perhaps. I haven't heard the one you favor Dorkus. It could well be the best choice. I have the parts to build up a follower that I have used for years and as far as I can tell has all most no signature of it's own. Maybe we could each build a one channel active stage (no switching) to sent to the others for evaluation and pick one as the test circuit.

Later
Bruce

HDTVman · 19th December 2002, 06:54 PM

Any new thoughts today guys?

SY · 19th December 2002, 06:57 PM

My soldering iron and Bridgeport are standing at the ready.

dorkus · 19th December 2002, 06:59 PM

i'll heat up the iron after the new year.

18th December 2002, 05:41 PM	#151
HDTVman diyAudio Member Join Date: Aug 2001 Location: Chicago area	Did you guys still interested or are you thinking about it? Later Bruce __________________ What ever makes the tunes flow

18th December 2002, 06:40 PM	#155
fdegrove diyAudio Senior Member Join Date: Aug 2002 Location: Belgium	SUGGESTION Hi guys, Just a little suggestion I'd like to make for the crappy unit: throw in a couple of resistors with magnetic leadout wires? Preferably either in series with the signal or as load resistors. Cheers, __________________ Frank

18th December 2002, 06:51 PM	#157
HDTVman diyAudio Member Join Date: Aug 2001 Location: Chicago area	I have to go see the Doc this afternoon so I'll talk to you guys later. I'm thinking the simplest possible active circuit would be the best choice, a CCS follower perhaps. I haven't heard the one you favor Dorkus. It could well be the best choice. I have the parts to build up a follower that I have used for years and as far as I can tell has all most no signature of it's own. Maybe we could each build a one channel active stage (no switching) to sent to the others for evaluation and pick one as the test circuit. Later Bruce __________________ What ever makes the tunes flow

19th December 2002, 06:54 PM	#158
HDTVman diyAudio Member Join Date: Aug 2001 Location: Chicago area	Any new thoughts today guys? __________________ What ever makes the tunes flow

19th December 2002, 06:59 PM	#160
dorkus diyAudio Member Join Date: Jun 2001 Location: NYC	holidays i'll heat up the iron after the new year.


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18th December 2002, 06:02 PM	#152
dorkus diyAudio Member Join Date: Jun 2001 Location: NYC	i'm still thinking about the circuit, and how we're gonna wire it up. need to think out the details. anybody have parts suggestions for the tweak circuit? i'm thinking Hovland feedback cap, Black Gate coupling cap, maybe Caddock MK132 resistors... for the cheapo version, i think we should use "crappy" metal films. those Radio Shack carbon films actually don't sound so bad.

18th December 2002, 06:35 PM	#153
SY diyAudio Moderator Join Date: Oct 2002 Location: Chicagoland Blog Entries: 1	Carbon comps or crappy metal films, sure. Japanese e'lytics for high value caps, cheezy Mylars for low value. Silver mica for very low value.

18th December 2002, 06:37 PM	#154
dorkus diyAudio Member Join Date: Jun 2001 Location: NYC	silver mica is actually pretty nice stuff. but we only need two caps - .22uF film and 10uF 'lytic. i'm not sure what to use for internal wiring, i like Cardas litz but it's harder to work with. any decent solid core with non-PVC insulation will do. oh yeah, we need a couple larger 'lytics for the power supply bypass. i like Nichicon Muse or Elna Cerafine/Silmic. i hear OSCON is good too but i don't have any.

18th December 2002, 06:41 PM	#156
dorkus diyAudio Member Join Date: Jun 2001 Location: NYC	yes, i was thinking steel endcaps and lead wires. i believe Yageo resistors from Digikey are magnetic, i will check.

19th December 2002, 06:57 PM	#159
SY diyAudio Moderator Join Date: Oct 2002 Location: Chicagoland Blog Entries: 1	My soldering iron and Bridgeport are standing at the ready.

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