MJE 340 / MJE 350 (MJE340/MJE350) and BD159 - GBP (Transit frequency fT) unknown?

[tiefbassuebertr]

http://www.diyaudio.com/forums/soli...-audio-power-output-stages-3.html#post2014823

Be careful witn MJE340/350 replacements, they may be substantially different from the old/slow Motorolas, actually better but troublesome.

These thoughts I had also by post #14. I will see the statement of Magnatec. From the good old "2N3055" e. g., still not out of production, there are various versions between 500 KHz and 4 MHz ft. I cannot rule out, whether it is also is by the MJE340/350 since Magnatec this one offer.

 

[wahab]

http://www.diyaudio.com/forums/solid-state/3853-bf469-470-471-472-vs-mje340-350-better.html

 

[tiefbassuebertr]

MJE340 and MJE350 now available from Magnatec, as I read about this offer from rs components:
Magnatec | Semiconductors | Discretes | Bipolar Transistors | NPN Power |MJE340
Magnatec | Semiconductors | Discretes | Bipolar Transistors | PNP Power |MJE350
But I don't find their own datasheets neither there nor on the own site of Magnatec , only this one from ST in short form version. I will ask Magnatec about the reason.

In general, Magnatec offer a wide range of fine solid state components for audio, both own producs and such from some jap. manufacturers like Sanyo, Sanken, JRC and Samsung - go to
http://www.semelab.com/pdf/acc.pdf
but there I don't find the MJE340/MJE350

This isn't true, as it turned out by an order there. The brand was SGS-Thomson (ST) instead Magnatec. Magnatec is both distributor and manufacturer. RS components is not able to distinguish it clearly by all products.
So I will clarify by phone in the future before ordering.

BTW the BD135 e. g. is labeled with the Magnatec logo:
Magnatec | Semiconductors | Discretes | Bipolar Transistors | NPN Power Up to 3.99A |BD135

 

[event horizon]

Just to throw a spanner in the works

I'm just looking at Tits 😉 Or for those of sensitive disposition - Towers International Transistor Selector...

Apparently Motorola MJE340 ft is 10Mhz & the compliment MJE350 is 4Mhz, these are minimum ft values though.

I thought On Semi was the new name for Motorola, i could be mistaken though..

 

[Mooly]

I have seen many MJE340/50's where you could rub the writing off to reveal another device type underneath... might even still have some somewhere.

 

[jacco vermeulen]

You mean that if i rub a Ford Capri hard enough there might be a DB6 underneith ?

 

[Mooly]

You mean that if i rub a Ford Capri hard enough there might be a DB6 underneith ?

Not exactly 🙂

You are as bad as the dearly departed Lumba lol.

 

[Elvee]

I had to measure a MJE340 some times ago. It was a Moto original.
At Vce=5V & Ic=100mA, Ft was 24MHz, measured at 5MHz.

 

[nigelwright7557]

Welcome to rswww.com are seliing MJE350's for about 10p each.
They are selling off the last of an obsolete batch.

 

[wahab]

You mean that if i rub a Ford Capri hard enough there might be a DB6 underneith ?

no, at best, a beetle or a trabant, more generaly, a bicycle..

 

[tiefbassuebertr]

Option to High Voltage Medium (Video) and High Power Devices for Output and VAS Stage

in this case this thread could be of interest:
http://www.diyaudio.com/forums/soli...wer-devices-output-vas-stage.html#post2239333