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UGS Power : it's U.P.
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Old 15th October 2018, 01:22 AM   #371
Zen Mod is offline Zen Mod  Serbia
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think AB

rails are 23Vdc

say that output swing is few volts shaved from that ....... so 40Vpp, roughly

twice that, amp being differential/bridged , so 80Vpp

in my book, that's exactement 100W/8R
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Old 15th October 2018, 01:57 AM   #372
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sorry, I got 25 w unbalanced from 23v rails and doubled it for balanced as it has twice swing. This is wrong.
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Old 15th October 2018, 05:42 AM   #373
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ok thanks to everyone, I did not know this project ...
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Old 15th October 2018, 05:50 PM   #374
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ok thanks to everyone, I did not know this project ...
P.S. with this end you must use only balanced connections, or you can also use unbalanced (rca) ?? THANK YOU
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Old 17th October 2018, 11:48 PM   #375
aspringv is offline aspringv  Australia
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I believe you can bridge one of the balanced connections to ground and you're good to go; albeit at a worse performance level.

I do have to say this is a doozy of a DYI project. A bit beyond me, so I'ts probably just as well I've never been able to get the boards or gerbers

...and I've still the UGS pre to do one day... (must learn to smd solder!)
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Old 18th October 2018, 12:56 AM   #376
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it is possible to use/wire any of inputs for SE/RCA

also , it is possible to use/wire outputs for both SE and BAL , and use either or both in same time
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Old 21st October 2018, 12:45 PM   #377
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hi all, I'm looking for transistors 2sk389bl and 2sj109bl on ebay are still there but at very expensive prices, there are alternatives to replace them?
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Old 21st October 2018, 01:08 PM   #378
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2sk170 and 2sj74

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Old 21st October 2018, 11:58 PM   #379
aspringv is offline aspringv  Australia
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Or better yet!

Linear Systems Matched LSJ74/LSK170 JFET pairs (Grade B) – diyAudio Store
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Old 22nd October 2018, 05:59 PM   #380
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hello, ok ... but, question, the 2sk389-bt and the 2sj109-bt year 7 pins in the gerber file of the pcb and so .. while the LSJ74 / LSK170 JFET in the year only 3 .... are they okay? thank you
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