F4 Beast Builders

[Zen Mod]

#101

 

[2 picoDumbs]

Hahahaha
What happened to 42?

 

[generg]

#101

he succeeded to count over 100...... :--))

 

[2 picoDumbs]

I nearly lost one of my lungs after reading that.
hahaha

Why is everyone so mean to Zen Mod lately? hahahahaha

 

[generg]

Mean, I am not mean..... ) I try to decipher his words.

Dodossess, #101 that are all secret audio codecs...

 

[2 picoDumbs]

Can't wait for my parts to arrive.

 

[2 picoDumbs]

I just had one major brain fart,
When I said 50mA zero tempco, I was out by 1 order of magnitude. Should have said 500mA.
Gee I'm a dumb bastard. Hahaha
Ok Laterals are a little better for temperature coefficient but Toshibas aren't that terrible if biased in the same range as the laterals.

 

[generg]

Hope is already with you.....

its a fun to play with the pucks, easy to mount, screws to attach the wires, so much surface.

 

[generg]

I just had one major brain fart,
When I said 50mA zero tempco, I was out by 1 order of magnitude. Should have said 500mA.
Gee I'm a dumb bastard. Hahaha
Ok Laterals are a little better for temperature coefficient but Toshibas aren't that bad if biased high enough.

but in the frontend we use normally 36-50mA...

 

[lhquam]

Adding the local negative feedback resistor Rlfbn will get rid of excess open-loop gain and lower the output impedance of the FE stage.

 

[generg]

o.k. lhquam, is there an advantage over the Cascode Feedback? Papa praised it ....

 

[2 picoDumbs]

but in the frontend we use normally 36-50mA...

Yes but the Laterals need 200mA to hit zero tempco.

 

[2 picoDumbs]

Adding the local negative feedback resistor Rlfbn will get rid of excess open-loop gain and lower the output impedance of the FE stage.

Compared to what? Nothing wrong with your circuit though.
My circuit doesn't have excess open loop gain.

 

[2 picoDumbs]

o.k. lhquam, is there an advantage over the Cascode Feedback? Papa praised it ....

I already told you the benefit of cascode feedback.

I may as well be talkin to a brick wall. Hahahaha

 

[2 picoDumbs]

Hope is already with you.....

its a fun to play with the pucks, easy to mount, screws to attach the wires, so much surface.

I already have plenty of pucks, just not the ones needed to build this amp.
Hope they arrive before Christmas.

 

[woody]

Has anyone thought about just using a cap to bypass the source resistors ?
Ok the value would need to be rather large but on the other hand it would
at a low voltage .

 

[generg]

Thanks for the hint!

)

 

[Zen Mod]

naah......

I would rather put it in turbo mode , than use cap across Rs

 

[generg]

Thanks for the hint!

)

what is turbo mode?

 

[Zen Mod]

hint:

which amp is Turbo here

and how ?