Keyboard Shortcuts
ctrl + shift + ? :
Show all keyboard shortcuts
ctrl + g :
Navigate to a group
ctrl + shift + f :
Find
ctrl + / :
Quick actions
esc to dismiss
Likes
- Electronics101
- Messages
Search
|
Re: Organizing cables
The 2N3055 is a TO-3 Power Transistor, RCA Made the best one's. Leon Robinson ?? K5JLR Political Correctness is a Political Disease. Politicians and Diapers should be changed often and for the same reasons.
On Monday, November 18, 2024 at 06:48:14 PM CST, wn4isx via groups.io <wn4isx@...> wrote:
Re: That one just showed up in the garage at some point...
?
I'm convinced cables and other parts breed in the dark.
I have some Soviet TO-5 NPN transistors that I think are their version of the 2N3055.
I have no idea where they came from. I also have a Soviet version of the uA741, again no idea where it came from.
?
[Of course I've traded for and bought at auction boxes of stuff. So anything could have snuck home.]
?
|
|
Re: Lock washer and nut for BNC bulkhead connector ??
Try 3/8-32?? Was standard for panel mtg pots back when they were US made. sent from my Galaxy Tab A On Tue, Nov 19, 2024, 10:36 AM David Slipper via <softfoot=[email protected]> wrote:
|
|
Re: Lock washer and nut for BNC bulkhead connector ??
toggle quoted message
Show quoted text
|
|
Re: Lock washer and nut for BNC bulkhead connector ??
I doubt if it's Imperial - I'm quite sure that Neil and Concelman who invented BNC were American. 73, Leon G1HSM? On 19 Nov 2024 14:10, "David Slipper via groups.io" <softfoot@...> wrote:
|
|
Re: Lock washer and nut for BNC bulkhead connector ??
From the Amphenol drawings it is 1/2" x 28. Dan K. On Tuesday, November 19, 2024 at 11:22:57 AM EST, Roy J. Tellason, Sr. via groups.io <roy@...> wrote: On Tuesday 19 November 2024 09:10:30 am David Slipper via groups.io wrote: > I picked up a LARGE handful of 50ohm BNC bulkhead connectors but some of > them lack nuts and washers :-( > > What size are they ?? > > The thread is not M10 so I assume its "imperial". Probably. > M10 crinkle washers are too big. Perhaps you'll find something useful in one of the references on this page: -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin |
|
Re: Lock washer and nut for BNC bulkhead connector ??
I believe the threads are 1/2-28 UNEF Mike Stone
On Tuesday, November 19, 2024 at 08:22:57 AM PST, Roy J. Tellason, Sr. via groups.io <roy@...> wrote:
On Tuesday 19 November 2024 09:10:30 am David Slipper via groups.io wrote: > I picked up a LARGE handful of 50ohm BNC bulkhead connectors but some of > them lack nuts and washers :-( > > What size are they ?? > > The thread is not M10 so I assume its "imperial". Probably. > M10 crinkle washers are too big. Perhaps you'll find something useful in one of the references on this page: -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin |
|
Re: Lock washer and nut for BNC bulkhead connector ??
On Tuesday 19 November 2024 09:10:30 am David Slipper via groups.io wrote:
I picked up a LARGE handful of 50ohm BNC bulkhead connectors but some ofProbably. M10 crinkle washers are too big.Perhaps you'll find something useful in one of the references on this page: -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin |
|
Re: Youtube video "Blinking LED with Single Transistor"
On Monday 18 November 2024 07:04:42 pm wn4isx via groups.io wrote:
Several companies make the 2N2222 (and 2N2222A) in TO-92 cases.Then they're not 2N2222s... -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin |
|
Re: Canned oscillator definition PDF
On Monday 18 November 2024 09:45:52 pm wn4isx via groups.io wrote:
On Mon, Nov 18, 2024 at 11:51 AM, Roy J. Tellason, Sr. wrote:I know a guy in WV who actually had a business selling quilting fabric online...though I don't know that there will be much quilting going on here these days...My wife has friends over for quilting...and that's a good day to be elsewhere...anywhere elsewhere. I'll help raise and lower the frame but a gaggle of chattering women is beyond my ability to cope. Although I'll admit sleeping under one on a cold winter night is nice and warm. And our feline mistress, Beasty Girl, also likes 'sneaking' under with us. We let the temps drop to 68 or so at night.Ours is not allowed on the bed. Woke up this morning and she was sleeping on my clothes that were laying on a chair. We had a nice electric blanket...really liked it until it caught fire. Our cat of the time got in my face making crazy noises, when I woke up I saw flames, grabbed the blanket, wadded it into a ball and ran to the back door, put it in the yard and drenched it with the hose.Was it showing signs of wear or what? Here we're on the second floor, so it'd have to go out the window. We've never had any trouble with them, except when they stopped working. I have to use a heating pad for my left knee and I use a home made arc fault outlet to NEMA 5-15P to plug into a regular outlet. All our breakers are GFI/Arc Fault but I like an extra layer of protection. I do not want a heating pad to go up in flames around my knee.No, that doesn't sound like it'd be fun at all. Nothing special about the breakers here, though the box did get replaced a while back. -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin |
|
GND routing for PCB strategy
Hello , I have made the PCB of my sequencer, I need to connect the GND's nets together .They are varius. I can do polygon pour , I can do direct track routing. How do you reccomenf to connect the GND in this circuit? PCB and video are attached in the link below. Thanks. PMA5-83-2W+.pdf |
|
Re: Youtube video "Blinking LED with Single Transistor"
On Monday 18 November 2024 11:21:50 am Gooey via groups.io wrote:
The HFT VOM has a transistor socket, no?I've not found that socket terribly useful, so far. And you need to know the pinout of the part ahead of time, which the tester referred to in another post will figure out for you. That socket has eight pins, and reminds me of a project I built many moons ago that used a bunch of RTL chips, that came in packages which would have fit that socket quite nicely if I'd had some at the time. -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin |
|
Re: Youtube video "Blinking LED with Single Transistor"
On Sunday 17 November 2024 08:45:04 pm Andy via groups.io wrote:
Oh, you should. I have one that I've had for a while now, and it's really handy. The thing has been mounted in a little metal box with connections to banana jacks added, so I can use a set of leads from my curve tracer (I happened to have matching colored jacks on hand here) for those parts that won't fit into the test socket, like TO-3 cases and such. I've used it enough that the button you push to test is starting to get a little flaky, and I'm thinking about getting another one. These days they're available with cases, for less than what I paid for mine, which was pretty bare-bones. I sent my brother a link to one of those, and he bought one immediately. :-)I have seen cheap (US$20 or so) component testers online, that now claim to be able to tell you what kind of device you have (e.g., cap vs. diode vs. FET vs. PNP or NPN), and can even identify which pin is which, and what is the gain (Beta or Hfe).? I have no idea how reliable they are about all that.? I have been tempted to get one. -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin |
|
Re: Canned oscillator definition PDF
On Sunday 17 November 2024 08:07:59 pm wn4isx via groups.io wrote:
" Despite its prevalence, English is a hard language to learn *due to its complex grammar rules, pronunciation variations, and vast vocabulary*. English grammar is riddled with exceptions and irregularities, making it difficult to master."I don't remember his specific reasons, but Isaac Asimov once said pretty much the same thing. Something about how Engish has adopted words from so many other languages was one factor that I think he mentioned. Worse is when I am looking for a datasheet on some chip I've never heard of, and the only thing I can find is in Chinese! And it's usually a pdf file, I haven't tried that with google translate... -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin |
|
Re: Organizing cables
On Sunday 17 November 2024 06:00:00 pm wn4isx via groups.io wrote:
I have 10 foot coax with micro-BNC connectors!I don't think I've ever seen those. Somewhere around here I have a hunk of coax with miniature versions of the PL-259 on each end. I've never seen anything that used those, either. That one just showed up in the garage at some point... -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin |
|
Re: Canned oscillator definition PDF
On Sunday 17 November 2024 04:31:08 pm wn4isx via groups.io wrote:
On Sun, Nov 17, 2024 at 01:57 PM, Roy J. Tellason, Sr. wrote:There's one of those in the other room, and when it was set up it took pretty much of the room. I did get to see it in action at one point, before I moved over here and filled that room with a bunch of "stuff". There's no room to set it up in there now. That bit of hoisting it up to get it out of the way sounds pretty good, though I don't know that there will be much quilting going on here these days...I really think that some companies ought to have access to a person whoMy wife ordered a nice quilting frame, it arrived, high quality parts, very reasonable cost but the directions were a mishmash of Korean and English. I was "forced" to visit our favorite Korean restaurant and show the directions to the owner. She and I spent an hour translating it into English. I offered to pay her for her time, "No, you and your wife are good customers." -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin |
|
Re: Youtube video "Blinking LED with Single Transistor"
On Sunday 17 November 2024 02:27:58 pm wn4isx via groups.io wrote:
I used RCA 2N2222's from the mid 1980s. I mention this because I suspect fabrication techniques have changed and this might effect the way a transistor goes into avalanche, I'm not sure it matters but all of mine have TO-18 metal cases, modern one all have TO-92.The ones in plastic cases are not 2N2222, they're either PN2222 or P2N2222 as the wikipedia page mentions... I use them when I need a bit more oomph, otherwise 2N3904/6 are preferred. -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin |
|
Re: Youtube video "Blinking LED with Single Transistor"
The HFT VOM has a transistor socket, no? Page 9 Setup transistor (hFe) Measurement Test transistors to ensure proper function. 1. Turn the Range Selector Switch to the hFE position. Turn Multimeter ON. 2. Insert transistor pins into the appropriate holes of the hFE testing socket (NPN or PNP) according to the EBC (Emitter, Base, Collector) sequence. 3. The meter will show the approximate hFE value. 4. When testing is complete, turn Multimeter OFF, remove and store Transistor and Multimeter. -- G.T. |
Leon
Gooey
to navigate to use esc to dismiss