Onsemi RF transistors...

[John Larkin]

https://www.onsemi.com/products/discrete-power-modules/rf-transistors#products=fnN0YXR1c352YWx1ZX4yfiF+TGFzdCBTaGlwbWVudHN+IX5PYnNvbGV0ZX4=

Only one PNP sadly, and slow.

 

[bitrex]

On 7/14/2023 2:36 PM, John Larkin wrote:

https://www.onsemi.com/products/discrete-power-modules/rf-transistors#products=fnN0YXR1c352YWx1ZX4yfiF+TGFzdCBTaGlwbWVudHN+IX5PYnNvbGV0ZX4=

Only one PNP sadly, and slow.

Looks like Central Semiconductor will still make the 2N4957 if you make
it worth their while:

<https://www.mouser.com/ProductDetail/Central-Semiconductor/CM4957-TIN-LEAD?qs=l7cgNqFNU1hSYreJzhif6w%3D%3D>

We could do a newsgroup group-buy! Put me down for...er, how much do you
think they\'ll want per unit, again?

 

[John S]

On 7/14/2023 1:36 PM, John Larkin wrote:

https://www.onsemi.com/products/discrete-power-modules/rf-transistors#products=fnN0YXR1c352YWx1ZX4yfiF+TGFzdCBTaGlwbWVudHN+IX5PYnNvbGV0ZX4=

Only one PNP sadly, and slow.

Yeah, but they can handle 20V and 50mA continuously.

 

[John Larkin]

On Fri, 14 Jul 2023 15:53:26 -0500, John S <Sophi.2@invalid.org>
wrote:

On 7/14/2023 1:36 PM, John Larkin wrote:


https://www.onsemi.com/products/discrete-power-modules/rf-transistors#products=fnN0YXR1c352YWx1ZX4yfiF+TGFzdCBTaGlwbWVudHN+IX5PYnNvbGV0ZX4=

Only one PNP sadly, and slow.


Yeah, but they can handle 20V and 50mA continuously.

Not at the same time.

 

[John S]

On 7/14/2023 4:26 PM, John Larkin wrote:

On Fri, 14 Jul 2023 15:53:26 -0500, John S <Sophi.2@invalid.org
wrote:

On 7/14/2023 1:36 PM, John Larkin wrote:


https://www.onsemi.com/products/discrete-power-modules/rf-transistors#products=fnN0YXR1c352YWx1ZX4yfiF+TGFzdCBTaGlwbWVudHN+IX5PYnNvbGV0ZX4=

Only one PNP sadly, and slow.


Yeah, but they can handle 20V and 50mA continuously.

Not at the same time.

Of course not. It would be too much to ask of them.

 

[Phil Hobbs]

John Larkin <jjlarkin@highlandtechnology.com> wrote:

https://www.onsemi.com/products/discrete-power-modules/rf-transistors#products=fnN0YXR1c352YWx1ZX4yfiF+TGFzdCBTaGlwbWVudHN+IX5PYnNvbGV0ZX4=

Only one PNP sadly, and slow.

There’s allegedly the NTE2403. It costs $3 and is very thinly stocked, but
is a bit better than the BFT92 overall.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC /
Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics

 

[Anthony William Sloman]

On Sunday, July 16, 2023 at 1:25:23 AM UTC+10, Phil Hobbs wrote:

John Larkin <jjla...@highlandtechnology.com> wrote:


https://www.onsemi.com/products/discrete-power-modules/rf-transistors#products=fnN0YXR1c352YWx1ZX4yfiF+TGFzdCBTaGlwbWVudHN+IX5PYnNvbGV0ZX4=

Only one PNP sadly, and slow.


There’s allegedly the NTE2403. It costs $3 and is very thinly stocked, but
is a bit better than the BFT92 overall.

https://www.nteinc.com/specs/2400to2499/pdf/nte2402.pdf

The datasheet covers both the NTE2402 (NPN) and the NTE2403 (PNP).

RS Components claims to have 50 in stock, but they aren\'t the worlds most reliable distributor.

--
Bill Sloman, Sydney

 

[Michael Terrell]

On Friday, July 14, 2023 at 2:36:43 PM UTC-4, John Larkin wrote:

https://www.onsemi.com/products/discrete-power-modules/rf-transistors#products=fnN0YXR1c352YWx1ZX4yfiF+TGFzdCBTaGlwbWVudHN+IX5PYnNvbGV0ZX4=

Only one PNP sadly, and slow.

Phasecom built a bunch of CATV Head end equipment with PNP RF transistors, rather than invert their AGC voltage and use better NPN transistors. They were some oddball flatpack Japanese design, that popped like flashcubes if lightning hit within a few miles of the headend. I blacklisted them for all new purchases.
Those transistors were around $8 each, unless you bought a reel of 3,000.