Already made some attempts in explaining procedure , for instance HERE
Lately being approached few times for same issues , so I decided to make it properly , in my bloggie ;
Pass Labs X150.5 , checking/adjusting offsets ,Iq and gain | Zen Mod Blog
If I made some mistake(s) , feel free to correct me .
Amp (and pictures) - Old'n'Cranky
Lately being approached few times for same issues , so I decided to make it properly , in my bloggie ;
Pass Labs X150.5 , checking/adjusting offsets ,Iq and gain | Zen Mod Blog
If I made some mistake(s) , feel free to correct me .
Amp (and pictures) - Old'n'Cranky
Attachments
)
clarify .
again - amp pictured in my blog isn't mine , what I had is only pictures from Old'n'Cranky
however , if you take a look at this :
Some shameful FW and PL clonning – First Watt M2 and Pass Labs XA60.5 …….. by Mighty Zen Mod | Zen Mod Blog
yes , I can tell few things about XA amps ........
clarify .
again - amp pictured in my blog isn't mine , what I had is only pictures from Old'n'Cranky
however , if you take a look at this :
Some shameful FW and PL clonning – First Watt M2 and Pass Labs XA60.5 …….. by Mighty Zen Mod | Zen Mod Blog
yes , I can tell few things about XA amps ........
Beautiful construction but can't leave my comment inside cause I am not registered in your blog.
Anyway your construction babies are fantastic
Whoopee ! I'm infamous again.......:
Old'n'Cranky ..... did you checked your Precious one ?
Baby is only 4 years old.
I doubt it needs even a thought.
Besides, I've been flat out with business etc.
I might have a chance in a week or three.
I'll report back once I have
So while I wait for parts for other jobs...........
Got into the .5 check up.
Bias (both sides) was low.
Was 87ma ish, now sitting at 100ma all four.
The heatsinks now run 25 degrees Celsius above ambient.
Yes, I know it should be higher, but in Papa terms, 'I can't touch it any longer' is around 4-5 seconds.
Even the front panel (obviously) gets HOT.
I'm gunna love this amp in winter
In summer, I'm going to have build a 'baby sitter'.
Slowly oh so slowly adjusting offsets now.
It takes time for it to stabilise after lifting the lid that few seconds for tweaking.
Yeah I know. I could make a cardboard lid with holes.
But I'm lazy. Um. Yeah. making the cardboard lid would make it faster and easier.....
Product improvement suggestion.
Maybe swap out the single turn pots for multi turn. Even 5 turn would be an improvement.
The single turns are just to sensitive. Foward a touch, back a touch, foward a touch. . . . . .
Like a game of cat and mouse.
Got into the .5 check up.
Bias (both sides) was low.
Was 87ma ish, now sitting at 100ma all four.
The heatsinks now run 25 degrees Celsius above ambient.
Yes, I know it should be higher, but in Papa terms, 'I can't touch it any longer' is around 4-5 seconds.
Even the front panel (obviously) gets HOT.
I'm gunna love this amp in winter
In summer, I'm going to have build a 'baby sitter'.
Slowly oh so slowly adjusting offsets now.
It takes time for it to stabilise after lifting the lid that few seconds for tweaking.
Yeah I know. I could make a cardboard lid with holes.
But I'm lazy. Um. Yeah. making the cardboard lid would make it faster and easier.....
Product improvement suggestion.
Maybe swap out the single turn pots for multi turn. Even 5 turn would be an improvement.
The single turns are just to sensitive. Foward a touch, back a touch, foward a touch. . . . . .
Like a game of cat and mouse.
that's your problem ...... and mine and any other Greedy Boy's problem
Pap is turning da pots with mind power
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