Hi Shawn,
Stick with the 2N3440 and 2N5415's. The NTE's are only 80 VDC.
The Book of Lies ........
Hey Glenn,
For me it's about temperature. I do not trust the Zetex products in that application. The top hats on the TO-39's will run cooler.
Hi imix500,
Those darn things are toooooo heavy to ship. That's a local pick up thing. But do let us know if you score the amps. Good luck!
-Chris
Stick with the 2N3440 and 2N5415's. The NTE's are only 80 VDC.
The Book of Lies ........
Hey Glenn,
For me it's about temperature. I do not trust the Zetex products in that application. The top hats on the TO-39's will run cooler.
Hi imix500,
Those darn things are toooooo heavy to ship. That's a local pick up thing. But do let us know if you score the amps. Good luck!
-Chris
Hi Shawn,
Look up a TO-220 driver. Pin assignments may change between those packages. No problem as you can rotate the package to line up the leads. Head to the On Semi site.
-Chris
Look up a TO-220 driver. Pin assignments may change between those packages. No problem as you can rotate the package to line up the leads. Head to the On Semi site.
-Chris
anatech said:
I did already but I came up with MJ182. I was hoping not to re-route the pcb trails? I'll look some more...
Shawn.
Tourette's
I was thinking about animating it but it may make me vomit. I have some ritalin here if you need? 😉
poobah said:
I was thinking about animating it but it may make me vomit. I have some ritalin here if you need? 😉
Re: Re: Zetex
Hmmn, new kid on the block. I must look closer. They have distribution and catalog houses here in North America. Good times Echo. Do you work for them? Just asking.
Cheers,
Shawn.
EchoWars said:
Hmmn, new kid on the block. I must look closer. They have distribution and catalog houses here in North America. Good times Echo. Do you work for them? Just asking.
Cheers,
Shawn.
poobah said:
A few years ago I led a sales presentation to a senior IT guy in a large corporate....didn't know he had Tourette's (my colleagues did)...
So here I was presenting away ....he frightened the c**p out of me....(collegues chuckling quietly).
Q
I was at an R & D conference... one of the speakers stuttered horribly. He was presenting HIS research and was very bright indeed.
You wanted to pity the guy until you realized he had the self confidence and nerve to give a long presentation.
On an interesting note... have you seen the gizmo where they mic the sound from a stutterer's voice, delay it slightly, and feed it in one ear. Instant cure for profound stuttering.
I believe the amp they used was stroked-down Crown 300...
They are working on making the thing wearable.
You wanted to pity the guy until you realized he had the self confidence and nerve to give a long presentation.
On an interesting note... have you seen the gizmo where they mic the sound from a stutterer's voice, delay it slightly, and feed it in one ear. Instant cure for profound stuttering.
I believe the amp they used was stroked-down Crown 300...
They are working on making the thing wearable.
Re: Re: Re: Zetex
I use them a lot. Not cheap as far as small-signal devices go (average about $1 US each or so), but good bandwidth, excellent power handling for their size, and very good gain characteristics. I use these two transistors (ZTX795A, PNP, and ZTX694B, NPN) in matched pairs for differential inputs. Average gain (at about 2mA Ic) is typically around 450 for the PNP's, and 650 for the NPN's. Not uncommon to sample NPN's with gains better than 1200.
But Chris is right...either find another TO-39 device, or substitute a TO-126 package, like the 2SA914 and 2SC1953.
Sold by Digikey.TomWaits said:
I use them a lot. Not cheap as far as small-signal devices go (average about $1 US each or so), but good bandwidth, excellent power handling for their size, and very good gain characteristics. I use these two transistors (ZTX795A, PNP, and ZTX694B, NPN) in matched pairs for differential inputs. Average gain (at about 2mA Ic) is typically around 450 for the PNP's, and 650 for the NPN's. Not uncommon to sample NPN's with gains better than 1200.
But Chris is right...either find another TO-39 device, or substitute a TO-126 package, like the 2SA914 and 2SC1953.
Hi,
go look at the To126 devices.
start with 2sa1360/c3423
also
1249/3117
1210/2912
1209/2911
1370/3467
1371/3468
1380/3502
1406/3600
1407/3601
1476/3782
1477/3787
1478/3788
1538/3953
1539/3954
1540/3955
1697/4474
1777/4623
1875/4976
plenty choice there to suit price and availability.
go look at the To126 devices.
start with 2sa1360/c3423
also
1249/3117
1210/2912
1209/2911
1370/3467
1371/3468
1380/3502
1406/3600
1407/3601
1476/3782
1477/3787
1478/3788
1538/3953
1539/3954
1540/3955
1697/4474
1777/4623
1875/4976
plenty choice there to suit price and availability.
Shawn,
Do you need some 2N3440's and 5415's or MJE340's and 350's?
I so I have some. Let me know.
Do you need some 2N3440's and 5415's or MJE340's and 350's?
I so I have some. Let me know.
poobah said:
wwee... ha..ha...have some focalin, concerta, adderalllllll, all in timed release form if you'd like... sort of like treating the low, medium, and high frequency problems selectively.. :-;
Shawn...
If u need more copper, I could "bulk up" a board prior to etching to whatever thickness u'd want.
burnedfingers said:
He's a BIG Poobah and likes big bling around the neck.🙂
burnedfingers said:
Thanks, but I should have no difficulty getting the transsitors. I'm not done yet with the substitutions so hold that thought.
auplater said:
I have decided to refurbish the orriginal output boards but what do you mean exactly by bulking up copper? Sounds interesting?
Shawn.
