Favorite BJT transistors, sot-23 and TO-92 equivalents - I
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From: krw on 2 Feb 2010 23:18 On Tue, 02 Feb 2010 17:06:26 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon(a)My-Web-Site.com> wrote: >On Tue, 02 Feb 2010 17:50:35 -0600, krw <krw(a)att.bizzzzzzzzzzz> wrote: > >>On Tue, 02 Feb 2010 08:58:02 -0700, Jim Thompson >><To-Email-Use-The-Envelope-Icon(a)My-Web-Site.com> wrote: >> >>>On Tue, 02 Feb 2010 07:54:47 -0800, Joerg <invalid(a)invalid.invalid> >>>wrote: >>> >>>>Okkim Atnarivik wrote: >>>>> Joerg <invalid(a)invalid.invalid> wrote in news:7soub2Fc5mU1 >>>>>> Hey, Winfield, Mikko just brought another excellent one for the >>>>>> jelly-bean list. This one has got to be in there, very low pinch-off >>>>>> JFET, steep enough to start an oscillator from less voltage than a fuel >>>>> >>>>> Yes, but he asked for BJTs... >>>>> >>>> >>>>Ok, then just make it a "bonus delivery" of ideas :-) >>>> >>>>Oh, Winfield: Please mention in your book the fact that there are >>>>newsgroups such as this one if people get stuck, need circuit ideas or >>>>want to help youngsters. Most people who buy the book nowadays don't >>>>have the foggiest what Usenet is. When I bought my AoE way back when I >>>>did not know sci.electronics.design either. >>> >>>I've been around here so long I started out reading and posting using >>>TIN ;-) >> >>You've been around so long that you witnessed the invention of tin. >>;-) > >Not quite. Wikipedia says tin plating has been done for "hundreds of >years". Tell me, how did they first make bronze? ;-) >I'm still young (at least of mind): > >I turn the big 7-0 at the end of this month (actually 17.5 birthdays >;-) I believe that would be the fist of next month (isn't that the *official* birthday?). >The end of March, "N" and I will celebrate the big 5-0 anniversary! Long time. June will be 39 for us.
From: JosephKK on 3 Feb 2010 00:19 On Tue, 02 Feb 2010 17:06:26 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon(a)My-Web-Site.com> wrote: >On Tue, 02 Feb 2010 17:50:35 -0600, krw <krw(a)att.bizzzzzzzzzzz> wrote: > >>On Tue, 02 Feb 2010 08:58:02 -0700, Jim Thompson >><To-Email-Use-The-Envelope-Icon(a)My-Web-Site.com> wrote: >> >>>On Tue, 02 Feb 2010 07:54:47 -0800, Joerg <invalid(a)invalid.invalid> >>>wrote: >>> >>>>Okkim Atnarivik wrote: >>>>> Joerg <invalid(a)invalid.invalid> wrote in news:7soub2Fc5mU1 >>>>>> Hey, Winfield, Mikko just brought another excellent one for the >>>>>> jelly-bean list. This one has got to be in there, very low pinch-off >>>>>> JFET, steep enough to start an oscillator from less voltage than a fuel >>>>> >>>>> Yes, but he asked for BJTs... >>>>> >>>> >>>>Ok, then just make it a "bonus delivery" of ideas :-) >>>> >>>>Oh, Winfield: Please mention in your book the fact that there are >>>>newsgroups such as this one if people get stuck, need circuit ideas or >>>>want to help youngsters. Most people who buy the book nowadays don't >>>>have the foggiest what Usenet is. When I bought my AoE way back when I >>>>did not know sci.electronics.design either. >>> >>>I've been around here so long I started out reading and posting using >>>TIN ;-) >> >>You've been around so long that you witnessed the invention of tin. >>;-) > >Not quite. Wikipedia says tin plating has been done for "hundreds of >years". > >I'm still young (at least of mind): > >I turn the big 7-0 at the end of this month (actually 17.5 birthdays >;-) > >The end of March, "N" and I will celebrate the big 5-0 anniversary! > > ...Jim Thompson Family time, then "N" and you time. Have a lot of fun.
From: Robert Baer on 3 Feb 2010 04:06 Jim Thompson wrote: > On Tue, 02 Feb 2010 03:20:19 -0800, Robert Baer > <robertbaer(a)localnet.com> wrote: > >> Jim Thompson wrote: >>> On 31 Jan 2010 10:51:43 -0800, Winfield Hill >>> <Winfield_member(a)newsguy.com> wrote: >>> >>>> Working on a table for our book, soliciting your >>>> opinions, info and advice. For example, try these: >>>> >>>> '3904 ans '3906 = jellybean? >>> Absolutely! Probably the most popular general purpose NPN/PNP pair >>> around. >>> >>>> MPS5179, PN5179, MMBT5179 -- what's PNP equivalent? >>>> >>>> BC547 NPN, sot-23 equiv = BC847, right? >>>> BC557 PNP, sot-23 = BC857 ? >>>> can I just show the C-grade high-beta variant? >>>> >>>> '2369 ... what's a better type, PNP equiv? >>> '2369 is a gold-doped NPN made for switching purposes (dating to my >>> youth :-). I don't know of a complement. >>> >>>> and etc... >>>> >>>> I'm working on two tables, a short one for inclusion >>>> within the body of the transistor chapter, and a long >>>> one to be placed at the back of the book. Your >>>> favorite candidates are solicited. >>> Raytheon CK722 ?:-) >>> >>> ...Jim Thompson >> Want a working unit? > > I have several each of CK722, CK760 and CK761 (if I can remember where > I stashed them :-). My father was a Raytheon wholesaler from 1956 > onward for quite a few years. > > ...Jim Thompson Cool...
From: Jan Panteltje on 3 Feb 2010 07:06 On a sunny day (Wed, 03 Feb 2010 01:08:52 +0100) it happened Fred Bartoli <" "> wrote in <4b68be94$0$21285$426a74cc(a)news.free.fr>: >Jan Panteltje a �crit : >> On a sunny day (Tue, 02 Feb 2010 12:57:26 -0800) it happened John Larkin >> <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote in >> <984hm5d9uh7qfnms2vp332ln3t53lislfi(a)4ax.com>: >> >>> On Tue, 2 Feb 2010 15:22:12 -0500, "Paul E. Schoen" >>> <paul(a)peschoen.com> wrote: >>> >>>> "Joerg" <invalid(a)invalid.invalid> wrote in message >>>> news:7soor4Fan9U1(a)mid.individual.net... >>>>> I'd also throw the BSS84 for P-channel into the hat. It's my jelly-bean >>>>> part. >>>> I still like the 2N3819 N-channel JFET. I used it in an audio preamp I >>>> built as a hobby project around 1970, and I used it in an analog >>>> programmable-gain amplifier I designed around 1985. It's still available >>> >from Mouser for 10 cents each, and is still made by Fairchild. >>>> www.fairchildsemi.com/ds/2N%2F2N3819.pdf >>>> >>>> Also, it's first on the list of devices in LTSpice! >>>> >>>> Paul >>>> >>> If you were stuck on a desert island and could only have one jfet, it >>> would have to be the BF862. Gm is 45 mS and noise is 0.8 nv/rthz. >>> There's nothing else like it. >>> >>> John >> >> I have a lot of BF245, only about 6.5 mS, but very nice to have around. >> If I was to stock up on MOSFETS I would get more IRLZ34N, low voltage on, >> high current, avalanche protected. > >On a desert island that would be a nice feature to protect you against >tsunamis. I had a litte avalanche here today. been snowing and ice-snow, sort of wet snow, after that. Lots of snow on the roof. This moring the nearby church bells sounded, and the sound triggered an avalanche from the roof! Very interesting effect:-)
From: John Larkin on 3 Feb 2010 10:02
On Wed, 03 Feb 2010 12:06:34 GMT, Jan Panteltje <pNaonStpealmtje(a)yahoo.com> wrote: >On a sunny day (Wed, 03 Feb 2010 01:08:52 +0100) it happened Fred Bartoli <" >"> wrote in <4b68be94$0$21285$426a74cc(a)news.free.fr>: > >>Jan Panteltje a �crit : >>> On a sunny day (Tue, 02 Feb 2010 12:57:26 -0800) it happened John Larkin >>> <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote in >>> <984hm5d9uh7qfnms2vp332ln3t53lislfi(a)4ax.com>: >>> >>>> On Tue, 2 Feb 2010 15:22:12 -0500, "Paul E. Schoen" >>>> <paul(a)peschoen.com> wrote: >>>> >>>>> "Joerg" <invalid(a)invalid.invalid> wrote in message >>>>> news:7soor4Fan9U1(a)mid.individual.net... >>>>>> I'd also throw the BSS84 for P-channel into the hat. It's my jelly-bean >>>>>> part. >>>>> I still like the 2N3819 N-channel JFET. I used it in an audio preamp I >>>>> built as a hobby project around 1970, and I used it in an analog >>>>> programmable-gain amplifier I designed around 1985. It's still available >>>> >from Mouser for 10 cents each, and is still made by Fairchild. >>>>> www.fairchildsemi.com/ds/2N%2F2N3819.pdf >>>>> >>>>> Also, it's first on the list of devices in LTSpice! >>>>> >>>>> Paul >>>>> >>>> If you were stuck on a desert island and could only have one jfet, it >>>> would have to be the BF862. Gm is 45 mS and noise is 0.8 nv/rthz. >>>> There's nothing else like it. >>>> >>>> John >>> >>> I have a lot of BF245, only about 6.5 mS, but very nice to have around. >>> If I was to stock up on MOSFETS I would get more IRLZ34N, low voltage on, >>> high current, avalanche protected. >> >>On a desert island that would be a nice feature to protect you against >>tsunamis. > >I had a litte avalanche here today. >been snowing and ice-snow, sort of wet snow, after that. >Lots of snow on the roof. >This moring the nearby church bells sounded, and the sound triggered an >avalanche from the roof! >Very interesting effect:-) As the snow creeps down the roof of our cabin, it curls over the edge and does this... ftp://jjlarkin.lmi.net/Bent_Icycles.jpg which I thought was pretty weird. But I grew up in the South, where there are no icicles, so it may be common. And I'm easily amused. Our building codes require flat structures to handle 400 pounds of snow load per square foot, so roofs tend to be steeply peaked. Every now and then the whole mess on the roof avalanches off onto the ground (and any objects nearby.) That can get noisy. John |