Another happy laureate of the mighty "fugly" award ...
Chalk, you could also easily win the "blur pics award"
I was just showing off
or perhaps it's the wine! 
I closed the blinds to take the photo so you can see the transparent layer of the front panel where the are two blue LEDs. The light also makes it through the little push switches, which you can just about see.
Last edited:
Samoloko : the attenuator is after the module, not before.
I don't know if this does change your projects
Sorry, my PC crashed it's HD.
I must have a backup somewhere, still searching my archives 5 years before...
I have the pdf, cannot post it here as the file is too large. ~3Mb
sent us an email and will attach and return.
Allan
I have a far few of the files still...
If you need any, just say so.
Or better still someone give me somewhere to upload these files, so they will be available to anyone who needs them.
UGS module first test
Hello again, I am doing my first UGS module test and I am seeing about 6dB gain. What should be the gain of the UGS module? Attached are some pictures of my test: 1KHz square wave input / output signals.
Hello again, I am doing my first UGS module test and I am seeing about 6dB gain. What should be the gain of the UGS module? Attached are some pictures of my test: 1KHz square wave input / output signals.
Attachments
As Cheff said in this post gain can be adjusted with Rfb
I'm afraid original site is now down
Can't remind the gain
I see you are measuring unbal output, will you use UGS unbalanced ?
site is up http://psykok.dyndns.org/diy/preamp_ugs but no trace of expected gain
I'm afraid original site is now down
Can't remind the gain
I see you are measuring unbal output, will you use UGS unbalanced ?
site is up http://psykok.dyndns.org/diy/preamp_ugs but no trace of expected gain
Last edited:
if you read french : http://psykok.dyndns.org/diy/preamp_ugs/pdf/UGS pour les nuls.pdf
differential gain is 10.4dB, unbal is 4.4dB
seems you're OK (not same Rin and/or Rfb, I suppose)
differential gain is 10.4dB, unbal is 4.4dB
seems you're OK (not same Rin and/or Rfb, I suppose)
Thanks Maousse, you are right I am testing unbalanced connection at the moment. Rin is 15K while the feedback Rfb is 56K like it is in v3. The finished amp will support both balanced and unbalanced inputs/outputs.
I am planning to use similar but different input selector and volume control then what Cheff used in his design, since I don't have the original PCBs. Details to follow. Could someone recommend a good frequency response SW for PC or MAC preferably open source. thanks a lot
I am planning to use similar but different input selector and volume control then what Cheff used in his design, since I don't have the original PCBs. Details to follow. Could someone recommend a good frequency response SW for PC or MAC preferably open source. thanks a lot
when using unbalanced mode UGS v3 with unbalanced In+ to unbalanced Out+ Is It correct to ground In- and Out-
at first I was using UGS v3 with not grounded In- and Out- then I grounded In- and Out- and got more gain but for me the sound become somehow unplesant
are R In and R FB and R G the most critical resistors which got to be of highest quality
http://www.diyaudio.com/forums/pass-labs/86300-ugs-adventures-5.html#post1008158
at first I was using UGS v3 with not grounded In- and Out- then I grounded In- and Out- and got more gain but for me the sound become somehow unplesant
are R In and R FB and R G the most critical resistors which got to be of highest quality
http://www.diyaudio.com/forums/pass-labs/86300-ugs-adventures-5.html#post1008158
Last edited:
I use my Cheff's UGS All Inclusive in unbal/unbal config for now.
My amp has 29dB gain, that makes 1.2V sensibility.
Cheff's UGS gain is enough for my configuration, I guess it could be OK for you too.
About PCB's, the Gerber Files are on the site liked on my previous post. But cost can be high for just one set. I have a spare full set if you need (I keep it for my old days ^^)
My amp has 29dB gain, that makes 1.2V sensibility.
Cheff's UGS gain is enough for my configuration, I guess it could be OK for you too.
About PCB's, the Gerber Files are on the site liked on my previous post. But cost can be high for just one set. I have a spare full set if you need (I keep it for my old days ^^)