UGS adventures

Hello generg
I just received the missing parts for the F5 on Thursday. I needed to return the 24PC power resistors 0.47R (MILLS) because Mr Pass wrote if we use multiple power mosfet is good to increase the Source resistor value .It will give some stability to the amp . Now I received those resistors to .
I have to each 4PC board .You know I want to build a high power X F5.
Each chanel I go with 6pair Toshiba power mosfet with out cascode .
I have a power transformer 2x18VAC 1.5KVA I want it to use it for these project .
I already received the parts for the UGS also , I will use PRP resistors , BC550C /560C for cascode .
I have some Toshiba 2SJ74BL/2SK170BL . I will have to each the PC board for that to .
It will be a chalange because double sided .
Thank for the advise about the pumpkin preamp .I don't know much about.
I only want a great balanced preamp .
I will have 3 balanced preamp , Aleph 1.7 , Borbely and the UGS . I hope one or two will be after my taste .
I also want to finish some of my project and enjoy the music ..
For a last project I want to build a Lampizator DAC sometimes at the summer .
Thanks for the good wish !
Same to you !
Greets
 
Hi gaborbella,

your Xd F5 sounds interesting, so many mosfets for each channel, wow!

I will try first ZenMods "reduced F4" with pumpkin, because it can be driven balanced what was not possible with the original F4!
I add the circuit. I want to get an impression of the F4 sound. 6 Mosfets per channel also.
If you want to read something about pumpkin http://www.diyaudio.com/forums/pass-labs/119070-pumpkin-preamp-more-boring-making-thread.html
ZenMod also showed a modification of F5, may be interesting for you!

Bonsoir et bon travail!
 

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Hello
Thank you very much !
Very valuable information's . If you finish with your pumpkin preamp would you please comment the sound .
Zen Mode is a great guy , I also was interested on the Aleph amp what He designed .
But now I stick with the F5 X .
I will see how it work out .
Couple guys already built X but not high power version .
In case if the X not working out to me for some reason I go with bridge mode .
Greets
 
.......

I will try first ZenMods "reduced F4" with pumpkin, because it can be driven balanced what was not possible with the original F4!
......

hi generg , Choky here !

don't use that bastarded F4 schematic of that pooftah ZM , he was probably weed high when he drew that ......

:rofl:

seriously - when I posted that , I was probably too deep in night ..... if I remember correctly - boyz promptly reacted (few posts later) , saying that LM431 will be fried .....

just forget that schematic ...... I'm sometime even dumber than usual ......

:cheers:

edit: you can still use another iteration I drew - F4 without JFet input buffer , just because :Pumpkin: is potent enough
 
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Oh Zen Mod,

first thanks, I would have killed LM431....

second .... what a pity, I thought it was a simple possibility for me to get very easily an balanced F-amplifier to test pumpkin and maybe UGS balanced, so to get finally into contact with SUSY, I need her!

F5 unbalanced, F4 unbalanced, my loudspeakers have 4 Ohm so Xing seems not to be a good possibility. Any advice? Deep in the night?😱
 
Oh Zen Mod,

first thanks, I would have killed LM431....

I'm glad yo didn't ....... even if that way you skipped good opportunity to learn why ....... :rofl:

second .... what a pity, I thought it was a simple possibility for me to get very easily an balanced F-amplifier to test pumpkin and maybe UGS balanced, so to get finally into contact with SUSY, I need her!

F5 unbalanced, F4 unbalanced, my loudspeakers have 4 Ohm so Xing seems not to be a good possibility. Any advice?

OK - even if this is sorta off topic here ( look at me - blasphemy - confessing off topic 😀 ) ther eis easy and powerful solution - look at pic - "bufferless" F4 .

make 2 of these , connect one per Pumpkin side , and you'll have Ballanced bufferless :Pumpkin: & F4 SUSY combo

you can ommit Pumpkin output caps too , you don't need them this way .

to skimp a little with heatsinks - make each half with just 50W dissipation (instead of 80W ) , so you'll get 100W of dissipation per channel ..... and that's pretty bearable .

do not worry - 3 mosfet pairs per side are pretty able to drive 2 ohms

Deep in the night?😱

meaning - late in the night , brain already in red ....... hehehe


edit :

almost forgot a pic :rofl:
 

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Hello
Do someone has a extra set UGS PC board and not planning to use them .
I would gladly buy it .🙂
I tried home made PC board but because it s a double sided not the best quality . I tried a couple board , these one is the best but still not good enough .:bawling:
Please if you have any spare board I would be a buyer .
Thank you very much !
Greets
 

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Hello

Unfortunately I can not log in , another problem I don't know French nothing at all .
Can you put me done 2PC of UGS board (a stereo set) .
I have power supply board so I do not need that..
Can I pay via pay pal ?
If yes please let me know how much would be with shipping to Toronto Canada .
Do I pay now or when the PC boards are ready?
Thank you very much .

Greetings
 
UGS PC board needed

Hello
Can someone help me please to participate in the GB unfortunately my french knowledge =0 .
I'm serious to build these preamp ,you can see I started to populate the PS board .
In case if I don't get help I have to use prototype board .:bawling:
I do not like it , I'd rather use a professional made PC boards but what can I do now . I purchased the exotic resistors for the preamp part . I have to finish it .
I hope someone can help with these problem please.
Thank you very much . 😀

Greetings
 

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Go to the page
homecinema-fr.com • Connexion

Log in and copy and paste in your message the last order lines and add your line

You see my order line on the bottom of the list.

"gmalardier : 2 kit UGS all inc / 12 module UGS / 2 kit UP/ 10 alims ugs simple
VENTEAUFEU : 2 kit UGS all inc / 0 module UGS / 0 kit UP
pivertvdt : 0 kit UGS all inc / 0 module UGS / 1 kit UP
Tazz28: 1 kit UGS all inc / 6 module UGS / 0 kit UP
metoss: 1 kit UGS all inc / 4 module UGS / 2 alim UP / 2 ampli UP / 4 alims ugs simple
breizheau : 0 kit UGS all inc / 12 module UGS / 0 kit UP
labaffegaston : 0 kit UGS all inc / 8 modules UGS / 0 kit UP / 6 alim UGS simple
Houeb86 : 1 kit UGS all inc / 4 modules UGS / 1 kit UP
ed wood: 1 kit UGS all inc / 4 modules UGS / 1 kit UP / 1 vuUP / 2 alim UP
fredy972😱 kit ugs/4 modules ugs/o kit up / 2 alim UGS simple
manu29: 1 kit UGS all inc / 6 module UGS / 1 kit UP / 2 alim UGS simple
thom38: 1 kit UGS all inc / 0 module UGS / 2 Uptrigger / 2 UPsupply / 2 UPampV2
Patjero : 1 kit UGS all inc
Boss73 : 1 kit UGS all inc / 0 module UGS / 1 kit UP
jef9200 : 0 kit UGS all inc / 2 modules UGS / 1 kit UP
eben : 1 kit UGS all inc / 2 modules UGS / 2 kit UP (peut être 3 en fonction du nombre final)
tapiste : 6 modules UGS / 6 alims UGS simple
divaman : 1 alim up / 1 ampli up / 1 Up trigger
fostexman : 1 kit UGS all inc / 10 modules UGS / 2 kit UP
fiscal:1 kit UGS all Inc
jfam:1 vuUP
curieux31 : 0 kit UGS all inc / 4 module UGS / 0 kit UP / 2 alim UGS simple
el pj : 2 alim UGS simple
MFC : 0 kit UGS all inc / 24 modules UGS / 1 kit UP /10 alim UGS simple/2 Trigger UP
poupi1135 : 1 kit UGS all inc / 2 modules UGS / 2 alim UGS simple
fred4307 : 0 kit UGS all inc / 2 module UGS / 2 UPampV2
streetplane: 1 kit UGS all inc / 0 module UGS / 0 kit UP
Chris.c : 0 kit UGS all inc / 2 module UGS / 0 kit UP / 1 trigger UP
alex_twn : 0 kit UGS all inc / 10 module UGS / 0 kit UP
passionelectron: 2 kits UGS all inclusive, 2 kit UP
escher63: 4 module UGS simple et 4 alims UGS simple
razzortec: 4 module UGS/ 2 alim UGS simple
generg: 6 module UGS simple et 4 alims UGS simple"

I suppose you need only 2 UGs and no "alims simple" means PSU, you have it already.
16 of march is order limit, paying till end of march.

good luck!
 
Hello
I can not sign up on that f.... site :xeye:.
Who organise these GB .
I would like to write direct to him .
Or please someone put me done for two UGS PC board .
I can not believe there is no body who can help me with these :bawling:.
Sorry I'm very upset .
Greets