Scryer ... or how F8 met Mighty SissySIT

[Plott]

I'll start dismantling now... too bad I didn't build it to be dismantled but for the eternity

 

[Zen Mod]

1pin sockets - learn to have them always in box, and mount on specific positions

 

[Plott]

Yes, that is learning until the bitter end

 

[Plott]

I'm now @1.27A Iq and cooking.
Vg M101 4-5 mV, M102 18-19 mV.

 

[Zen Mod]

I'm now @1.27A Iq and coocking.
Vg M101 4-5 mV, M102 18-19 mV.

R116 decreased in value?

I said :

give me present gate voltages of M101 and M102 - both ref to output node,

meaning :
red probe to M101 gate, black probe to output, and
red probe to M102 gate, black probe to output

 

[Plott]

Iq 1.6A
M101 4.04v
M102 -4.25v

Yes, R116 1k now

 

[Zen Mod]

now you know the drill

if you want more, decrease R116

gate voltages are symmetrical enough, no need to touch level shifter resistor

 

[Plott]

Many thanks!
I'm not at the end of the Iq pot, so I could increase the Iq further without decreasing R116, but I think 1.6A is enough.
I'm a weeeeaaaaklingseeeesss sissy

 

[Plott]

How long should I cook it, Iq is rock stable since 15 minutes.

 

[Zen Mod]

it's cooked

 

[Zen Mod]

I'm not at the end of the Iq pot,

 

[Plott]

many thank Mightiness!
Next channel tomorrow. Or today, but I'm tired, the day started at 3:40... which is not good.

 

[Zen Mod]

my day ended after that, then started around noon

 

[Plott]

Okay.. the pot is not in the end position see #412

 

[Plott]

my day ended after that, then started around noon

also very good 🤪

 

[pfarrell]

I found the Iq very stable overall—BUT—swift changes observed with 4 sides and popping the lid on and off....I see ZM has all his stuffs in the wind on his bench.... dunno if it matters...

 

[Zen Mod]

naah

it is at least range above, regarding Iq stability, than we are used with majority of Pa's amps

he's really counting on temperature continuum (system temp equilibrium) as important factor for functionality of amp

take it as blessing of A Class amps - to paraphrase his words - A Class is allowing me to make simpler constructions, which can only be beneficial for sound

 

[Plott]

Both channels Set @1.6A (176 mV) and cooked
Now some design work, until the ordered parts (fuse holder, mains inlet) arrive.

 

[Zen Mod]

does it sing?

fuses, security, safety ...... who needs that??

 

[Plott]

Not yet, have to mount the connectors, but had a long day, again 🤪
Safety... my job, being work safety expert