New Stasis front end

[Blk Dynamite]

I have one prepared that will do the job.

Assuming this will work w your new chassis?

 

[2 picoDumbs]

Hell, that must be bigger than the chassis you are organizing for the GB.

Simple
Monoblocks with 24 output pairs is plenty adequate.

 

[2 picoDumbs]

Assuming this will work w your new chassis?

Yeah

 

[Blk Dynamite]

I had ordered ZM FE. This will make me re think the voltage I need from the transformer. This will be interesting 😀

 

[gary s]

Check post #490 re ZTX transistors for higher rail voltages.

 

[2 picoDumbs]

ZTX851
ZTX951

Are good devices with higher voltage ratings

ZTX451
ZTX551
Will also work too.
That is higher voltage ratings than ZTX450, ZTX550.

 

[gary s]

These 2 pairs are 60V Vceo rated, if you want higher, look at ZTX457 / ZTX558 which are 300V and 400V respectively. All have around the same HFE.

The originally specified ZTX450 / ZTX550 are 45Vceo.

 

[Blk Dynamite]

Check post #490 re ZTX transistors for higher rail voltages.

Definitely saw that. I was originally looking at ~60 volt rails but going bridged I’d only need 35 volt rails but still 800va like originally planned. A 25x2 - 800VA transformer should do just fine

 

[Blk Dynamite]

PCBway don’t play around when it comes making and shipping these out

 

[Zen Mod]

yeah!

must love that black smudginess

 

[Blk Dynamite]

Lol doesn’t bother me

 

[gary s]

Very nice looking boards, just what I ordered as well, mine should be here this coming week hopefully. Only difference, mine are in blue.
Also have the NP FE pcb as well to cover all bases.

 

[gary s]

For those interested, Nelson sent me this email today with regards to max rail voltage for the Stasis FE pcb - as per his design he recommends max rail volts as +/- 60VDC.

Nelson quotes:
"Whatever the transistors are rated at for voltage. I recall the ones I have around here are 120V, so +/-60V is likely the limit. You have to
watch the bias currents as the dissipation on the transistors can get
high. For the big sink Vas parts I wouldn’t want to exceed about 15 mA
at these voltages."
:end quote.

 

[Russellc]

Simple
Monoblocks with 24 output pairs is plenty adequate.

I might have that put on my tombstone.

Russellc

 

[Russellc]

PCBway don’t play around when it comes making and shipping these out

I used them for a DC blocker project, very, very fast. I think my cost was 2 or 3 dollars, the rest was shipping, about 20dollars total for 5 boards.

Russellc

 

[2 picoDumbs]

I might have that put on my tombstone.

Russellc

Hahahaha

 

[gary s]

Mr Pass sends his regards to all, staying safe and well in his Sea Ranch abode during these troubling times in CA.

 

[Zen Mod]

funny Pa

 

[gary s]

How did I know the mighty Zen Mod would be first to comment - well done.

 

[Zen Mod]

well, he's my Pa

🙂