UGS adventures - Page 112

rade95 · 14th February 2013, 05:46 PM

Quote:

Originally Posted by Maousse

rade95, you've got PM

Gerbers for Cheff's All Inclusive version is at http://psykok.dyndns.org/diy/preamp_.../GerbersCG.zip

Simple version (the PCB you actually have) are at http://psykok.dyndns.org/diy/preamp_.../UGSGerber.zip

Great, that is precisely what I was looking for. many thanks

Maousse · 14th February 2013, 06:24 PM

You are welcome

rade95 · 15th February 2013, 03:19 AM

Tonight I did my first audio test with bare bone UGS modules. The setup: iPhone 5 as a digital source 192K, 24 bit resolution, D/A -> UGS unbalanced, Out(-) was left open meaning the gain was ~3dB -> a stock Hafler DH220 power amp -> Goodmans Axiom enclosures with Altec 12" woofers. The sound was astonishing, crisp and exceptionally detailed. I only played good old pop from the 70s and 80s digitally enhanced. For comparison I also have a PassLabs X2.5 as well as Aleph P and the UGS is right there side by side with those 2 exceptional pre-amps. I also did a audio tone test using Sound Tone app, 20Hz - 16KHz (I cannot hear tones above 16K with a normal listening sound pressure). Anyway the UGS blew me away and I cannot wait to build the rest of this astonishing pre-amp with input selector, volume control and the remote. stay tuned....

CeeVee · 15th February 2013, 05:59 AM

Welcome to the Club

samoloko · 15th February 2013, 11:52 AM

Quote:

Originally Posted by rade95

Tonight I did my first audio test with bare bone UGS modules. The setup: iPhone 5 as a digital source 192K, 24 bit resolution, D/A -> UGS unbalanced, Out(-) was left open meaning the gain was ~3dB -> a stock Hafler DH220 power amp -> Goodmans Axiom enclosures with Altec 12" woofers. The sound was astonishing, crisp and exceptionally detailed. I only played good old pop from the 70s and 80s digitally enhanced. For comparison I also have a PassLabs X2.5 as well as Aleph P and the UGS is right there side by side with those 2 exceptional pre-amps. I also did a audio tone test using Sound Tone app, 20Hz - 16KHz (I cannot hear tones above 16K with a normal listening sound pressure). Anyway the UGS blew me away and I cannot wait to build the rest of this astonishing pre-amp with input selector, volume control and the remote. stay tuned....

what Idss are your jfets In UGS and someone please recommend best values

rade95 · 15th February 2013, 01:20 PM

Quote:

Originally Posted by samoloko

what Idss are your jfets In UGS and someone please recommend best values

The UGS modules I have were already assembled some time ago by another diy-er, who lost interest, so they use good old dual K389/J109BLs. I feel lucky

Now I want to assemble another pair of modules using discrete JFETs, but this will take some time since I haven't got the PCBs yet. What do you have?

samoloko · 16th February 2013, 05:54 AM

I use sk170 and sj74
I would like to know If going high than 6 mA In Idss would bring Improvement In sound

chalkandtalk · 16th February 2013, 08:53 AM

I have a pair of pcbs with DIY board spare if someone wants them. I have been meaning to put them in swap meet for some time.

rade95 · 16th February 2013, 01:14 PM

Quote:

Originally Posted by chalkandtalk

I have a pair of pcbs with DIY board spare if someone wants them. I have been meaning to put them in swap meet for some time.

If they are UGS modules PCBs, I am interested. I have a spare power supply for them.

Stealth · 17th February 2013, 01:53 PM

this board still available if someone needs

PCB and Trans GB for UGS and the "All inclusive" Variant [DEADLINE : Feb,16th 2008]

15th February 2013, 03:19 AM	#1113
rade95 diyAudio Member Join Date: Apr 2010 Location: Boulder, Colorado	Tonight I did my first audio test with bare bone UGS modules. The setup: iPhone 5 as a digital source 192K, 24 bit resolution, D/A -> UGS unbalanced, Out(-) was left open meaning the gain was ~3dB -> a stock Hafler DH220 power amp -> Goodmans Axiom enclosures with Altec 12" woofers. The sound was astonishing, crisp and exceptionally detailed. I only played good old pop from the 70s and 80s digitally enhanced. For comparison I also have a PassLabs X2.5 as well as Aleph P and the UGS is right there side by side with those 2 exceptional pre-amps. I also did a audio tone test using Sound Tone app, 20Hz - 16KHz (I cannot hear tones above 16K with a normal listening sound pressure). Anyway the UGS blew me away and I cannot wait to build the rest of this astonishing pre-amp with input selector, volume control and the remote. stay tuned.... __________________ UGS pre, stock F5, PassLabs X2.5, Aleph P

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14th February 2013, 06:24 PM	#1112
Maousse diyAudio Member Join Date: Oct 2006	You are welcome

15th February 2013, 05:59 AM	#1114
CeeVee diyAudio Member Join Date: Dec 2006	Welcome to the Club

16th February 2013, 05:54 AM	#1117
samoloko diyAudio Member Join Date: Jun 2006	I use sk170 and sj74 I would like to know If going high than 6 mA In Idss would bring Improvement In sound

16th February 2013, 08:53 AM	#1118
chalkandtalk diyAudio Member Join Date: Jan 2006 Location: North west England	I have a pair of pcbs with DIY board spare if someone wants them. I have been meaning to put them in swap meet for some time.

17th February 2013, 01:53 PM	#1120
Stealth diyAudio Member Join Date: Nov 2009	this board still available if someone needs PCB and Trans GB for UGS and the "All inclusive" Variant [DEADLINE : Feb,16th 2008]