mpmarino said:
Does that matter to you? You're not going to be there anyway
Though you sure ought to! 😀
Magura 🙂
Magura said:
Does that matter to you? You're not going to be there anyway
Though you sure ought to! 😀
Magura 🙂
"wedding ............. "
hehe
that must be from wife's side of familly
( ZM , just came back from one such wedding party)
Zen Mod said:
I'm certainly not opposed to the idea!
Nope, my side. One thing I've learned in my life is that family must come first. Yes, family before audio.
he he
mpmarino said:
not from that reason ,certainly ;
even if I can name a few different ones.......as having more Altec drek than me...........
Magura said:
I'll save you the humiliation, and ask a moderator to delete your post
Magura 😉
mp edited his post too late , obviously 😉
HeHe all that OT... Well i am one of the greedy guy's, so i naturally got some more quistion's today.... ---------------------->
I stripped my single-sided PCB-layout down to 7jumperwire's now. The first pcb i made, i had a failure on schematics, that i diden't see, till it was all etched
Well nomatter, it's kindof fun to draw pcb's right ?
I am hoping to finish up Left channel pumpkin this weekend, and i would like some explanation about howto adjust this little bugger 😀
1. The WR1 is as i see it, a trimmer to adjust the balance between q1 and q2 right ???
I see, that the 'sliderleg' is connected to drain q10 etc... and that the two outherside's of the trimmer is connected to source's of q1/q2, how doe's this work ??? And how do i adjust it, i mean where to meassure, and how much ? ?
2 The WR2 is for adjustning the current source (again as i see it!), and again howto adjust, and where to meassure ? ?
3. Do i win something if i use a balanced attenuator, instead of a normal stereopot at the indput, when i got no balanced sources, and does it matter at all ???
Really be glad for prober answer 😀 Free beer two those who answer my quistion's at my place here in DK 😎
Jesper.
Schematic link here
I stripped my single-sided PCB-layout down to 7jumperwire's now. The first pcb i made, i had a failure on schematics, that i diden't see, till it was all etched
Well nomatter, it's kindof fun to draw pcb's right ?
I am hoping to finish up Left channel pumpkin this weekend, and i would like some explanation about howto adjust this little bugger 😀
1. The WR1 is as i see it, a trimmer to adjust the balance between q1 and q2 right ???
I see, that the 'sliderleg' is connected to drain q10 etc... and that the two outherside's of the trimmer is connected to source's of q1/q2, how doe's this work ??? And how do i adjust it, i mean where to meassure, and how much ? ?
2 The WR2 is for adjustning the current source (again as i see it!), and again howto adjust, and where to meassure ? ?
3. Do i win something if i use a balanced attenuator, instead of a normal stereopot at the indput, when i got no balanced sources, and does it matter at all ???
Really be glad for prober answer 😀 Free beer two those who answer my quistion's at my place here in DK 😎
Jesper.
Schematic link here
lykkedk said:
first No.2 :
preadjust R22 + WR2 to ~ 200E ; that will give you ~ 16mA through input LTP ,for start.....
anyway...................
with WR2 you can adjust currents through left and right output CCS-es (look at currents through R7 and R8) and - accordingly - offset between outputs AND GND
with WR1 you can decrease and null difference between + and - output (that's that- another one DC offset 😉 )
you can use one stereo pot per channel
or question was different?
in any case- tweaking both WRs is iterative process ; as Papa teaches/preaches in past - take it slowly 😉
edit :
you can pass all my beers to Lucky Luke
if I didn't answer on all Qs,ask again,please......
No that's fine thanx a lot...
Thanx for nice answer's very cool.
And about the beer. Steen can come and listning + drinking beer with me, no problem. (He would like to take train back home i suppose then) 😀
Maybe.. (99%) 😉 I will be back later this week / next week... with new quistion's.
Have a nice evening.... ZenMod
Jesper.
I must had been mad... yesterday, replying that this was the answer i was searching for... sry. about that !... The thing i would like to know(s) is :
1 I assume i short GND and -in when using it unbalanced with no balanced sources ?
2 Can i then use +in from LEFT channel and +in from RIGHT channel, with a normal alps 4,7Kohm stereopot. ??? -- OR do i win somthing using a 4deck here ??? This is something i allway's find hard to figure out btw.
3 The BC546C ... I will match them for HFE, with a meter (multimeter) right ?
4 Also the j309 / irf610 / irf9610, need's matching, but not between parts right ? only pairs ?
That should be it i think !
Jesper.
lykkedk said:
1. yes ......
2. yes- normal stereo pot used for both channels........ as in any usual unbal preamp
3 . good enough ........
4. match between left and right........J309 .....IRF610 .....IRF9610
Cool ZenMod...
Then q1/q2 matched pair ? (j309)
Then q5/q7 matched pair ? (irf9610)
Then q6/q8 matched pair ? (irf610) .... Cool it should be doable.
Have a nice day.
Jesper
Then q1/q2 matched pair ? (j309)
Then q5/q7 matched pair ? (irf9610)
Then q6/q8 matched pair ? (irf610) .... Cool it should be doable.
Have a nice day.
Jesper
lykkedk said:
yup
q1/q2 .....J309 or J310 or 2SK170V matched pair
q3/q4 .... whatever NPN bjt thingie you have .....(pinout!!) matched pair
q5/q7 .....9610 or 9510 ......matched pair
q6/q8......610 or 510 ......matched pair
q1/q2 thermaly coupled (face to face)
q3/q4 too ,
q5,q6,q7,q8,q10 on same heatsink
edit:
why not switch to toobz........ ?
they have more legs ...........
lykkedk said:
hehe
pretty clumsy .........
but- even like that, certainly better than any of ZM made pcbs
Yep, this is my first attemp to do layout with diptrace... Actually it's not very easy (pattern traces etc...) I think this layout is better than the first one i fcuk'et up, cause now i only got 7jumper's on the singlesided layout.
Well i tried to hold 'the power' at left side pcb, and place resistors near part's. But it's not near perfect, but i will try it out, and if no hum and other probl. i dont care, as long as it made prober.
One again thanx for your'e help Zenmod
Jesper.🙂
Isen't this pcblayout-forum.com ??? 😕
uppsss... sry. for OT guy's 😀
mpmarino : You use batteripower for your'e pumpkin ? - Tell me about it 🙂
Jesper.🙂
uppsss... sry. for OT guy's 😀
mpmarino : You use batteripower for your'e pumpkin ? - Tell me about it 🙂
Jesper.🙂