yes , 2SJ109BL is practically matched pair of 2SJ74BL on one die/package
same with 2SK389BL , being a pair of 2SK170BL
if you observe pinout in datasheets , you'll know how to put pair of smaller ones on pcb , instead of dual one
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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yes , 2SJ109BL is practically matched pair of 2SJ74BL on one die/package
same with 2SK389BL , being a pair of 2SK170BL
Zen Mod: isn't there any thermal coupling needed?
thanks
What are your experiences with this reseller? I'm a bit disappointed - I ordered 4 pairs - everything ok but Idss: 6.45 / 6.69 and 5.95 / 6.96 in the first quadruplet.
They should specify what the word "matched" means. In my case only by the color.
hi, can you escape me, I have a doubt about the pcb here published for this UGS.Up, and how many is the assembly of SMD capacitors mounted at the bottom of the card, I think there is a problem with one that does not have the track connected but remains isolated, mind in the photos of the guide you see perfectly .. and an error on the pcb or I saw bad? now I have already procured the PCBs and x as I try with the tester I do not find any connection ?? thank you
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Hi neno70,
you have an older version of pcb.. see this: <<Youpi on se fait un UP - Thread officiel of ze Up builder>> - 29916546 - sur le forum <<Amplis et Preamplis>> - 1056 - du site Homecinema-fr.com
you have an older version of pcb.. see this: <<Youpi on se fait un UP - Thread officiel of ze Up builder>> - 29916546 - sur le forum <<Amplis et Preamplis>> - 1056 - du site Homecinema-fr.com
thank youHi neno70,
you have an older version of pcb.. see this: <<Youpi on se fait un UP - Thread officiel of ze Up builder>> - 29916546 - sur le forum <<Amplis et Preamplis>> - 1056 - du site Homecinema-fr.com
hello, someone would have the last gerber files, maybe with the correction of this missing track in the pcb? thank youHi neno70,
you have an older version of pcb.. see this: <<Youpi on se fait un UP - Thread officiel of ze Up builder>> - 29916546 - sur le forum <<Amplis et Preamplis>> - 1056 - du site Homecinema-fr.com
http://psykok.homelinux.org/diy/UP/V2/GerberUPV2.ziphello, someone would have the last gerber files, maybe with the correction of this missing track in the pcb? thank you
Symmetric bal in/out Pure Class A MOSFET amplifier PCB UGS UP ! | eBay
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hello, thank you, I have already bought these pcb on ebay, and lacks that track x the Multilayer Ceramic Capacitor SMD, 0.1 μF, 50 V, if there are no other gerber files corrected light a bridge x correct. thank you
The problem solved. I got the faulty transistors from joshvi (diyaudio member). I was surprised because every one I had previously measured using DCA's atlas and they were ok. Now I've replaced them with a mix from reichelt.de and avelmak.sk (Insemi and Sanyo) . It's a delightful fact because I'm building 6 UG channels
hi, I wanted to send the pcb to print to make this amp but I found the gerber file. now my file has that famous little flaw (the lack of the small copper x SMD line) no one to a correct version from this error ?? thank you
just make small wire bridge
another question ; if instead of the cap of 33000uf I use the 47000uf that I already have? I can do it ?? thank you
in 99% of cases , where 33mF is , you can use 47mF too
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