F4 Beast Builders

[generg]

Thanks for the hint!

::--))

Furious five!

 

[2 picoDumbs]

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 .

Yes I have thought about doing this sought of thing on the F3 amp, but this is not even necessary here.
There is no problem to solve here, we already have a circuit that is happy running without source resistors in the first place. Touch Wood. Hahahaha

 

[Zen Mod]

yup

simple brute force approach - use pucks , them riding on happy current , pretty much cool head conditions

no biggie

as in many previous cases (with Papa) , amp itself is pretty much embarrassing ........ to any other comparable

 

[Zen Mod]

https://youtu.be/uLlv_aZjHXc

 

[2 picoDumbs]

"Stupid git" hahahaha

 

[2 picoDumbs]

Parts arrived.
I'll start doing curves of Id vs Vgs, in the area we are interested in.

 

[lhquam]

Which parts did you order? I also just received a shipment of IXYS parts to measure.

 

[2 picoDumbs]

The only parts they had in stock at Digikey was 48N60P and 40P50P.
I was hoping to get 2 of every part listed in the first post but the MOQ at digikey made it too expensive to order the others in.
That was what I was originally planning on to determine the best matching parts, but we have enough tricks up our sleeve not to be too concerned about perfect matching. So I might just stick with those.

I'll start measuring 48N60P.

 

[lhquam]

I will measure the IXFN44N80Q3 and IXTN40P50P.

 

[Zen Mod]

tnx for sharing , ya Dodossess

 

[generg]

I have some IXTN170P10P

and I hope to get these after Chrismas

IXFN170N10 - N-Ch 100V 170A 600W 0,010R SOT227B

How do you measure them? So I could join in.

 

[2 picoDumbs]

I'll be just producing curves of Id vs Vgs using a simplified version of Papa's mosfet tester.
http://www.firstwatt.com/pdf/art_mos_test.pdf

 

[generg]

I could use my locky_s curvetracer.

The region up to 1.5 or 2 Amps?

 

[2 picoDumbs]

Can you obtain data from it, or is it just a graphical representation?

 

[delecoy]

Broskie has some some blog entries on circuits using a 2SK82 in a buffer configuration, FWIW. There is more interesting content beyond that, most far over my head

Tube CAD Journal

 

[Soundhappy]

Broskie has some some blog entries on circuits using a 2SK82 in a buffer configuration, FWIW. There is more interesting content beyond that, most far over my head

Tube CAD Journal

Yeah i see Broskie schematics with 2SK82 Vfet's.
Scrooĺ page down.
Thanks for share

Even More Single-Ended Amplifier Circuits

 

[2 picoDumbs]

Some unrelated porn to keep Zen Mod interested.
https://www.youtube.com/watch?v=Ytqk_9z0KMQ

 

[Zen Mod]

why should I be interested ?

I have full yard of them , here at OPLDF

 

[2 picoDumbs]

Hahahaha

 

[generg]

here comes my last iteration from hearing, I stop now until something exceptional happens....