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 Forum: General Discussion   Topic: Hammond die cast al case, heat sink?

Posted: Sun Jan 14, 2018 5:50 am 

Replies: 11
Views: 93


Better than no heat sink!

 Forum: General Discussion   Topic: Greetings!

 Post subject: Re: Greetings!
Posted: Thu Dec 28, 2017 6:40 am 

Replies: 5
Views: 132


Hoping all us kids got what they were hoping for this Christmas! (if you've been nice all year!)
The only plan I found that works for not enough storage space is to buy more space. Time to move! :)
Happy New Year all!
John

 Forum: Then & Now   Topic: Do You Remember....

 Post subject: Re: Do You Remember....
Posted: Fri Dec 08, 2017 12:38 pm 

Replies: 15
Views: 4130


They sure were! I used a ThruLine wattmeter/SWR Meter in the Air Force in the 60's.

 Forum: Then & Now   Topic: Do You Remember....

 Post subject: Re: Do You Remember....
Posted: Wed Nov 29, 2017 11:37 am 

Replies: 15
Views: 4130


Correct dacflyer! It was before I found out that the antenna had to be tuned! Had to learn about "resonance"!
Next build was a homebrew antenna tuner. Much fun.

 Forum: Then & Now   Topic: Do You Remember....

 Post subject: Re: Do You Remember....
Posted: Wed Nov 08, 2017 3:57 pm 

Replies: 15
Views: 4130


And today, if those guys (us?) can't change the settings on their browser, or forward a cellphone call, or switch to "Aircraft Mode", they're considered a blithering idiot. In the day, we got into electronics for what it was. Now, you can't function without several email accounts, and a he...

 Forum: General Discussion   Topic: Microwave oven transformer... reversed.

Posted: Wed Nov 08, 2017 3:31 pm 

Replies: 10
Views: 676


Amazingly versatile transformer, that is. Wind it for whatever you like!
Only concern about an unloaded secondary with the primary powered, is contact between the secondary wires! Lotta amps!

 Forum: General Discussion   Topic: Ink Drowned my AIO Printer

Posted: Mon Oct 16, 2017 10:45 am 

Replies: 14
Views: 751


Thanks, but still cannot find in the manual any hints at "Cleaning the cartridge nozzles". :(
Have used hot water after removing the cartridge from the machine, or even isopropyl alcohol. But, the old cartridges are stubbornly clogged.

 Forum: General Discussion   Topic: Ink Drowned my AIO Printer

Posted: Tue Oct 10, 2017 6:28 am 

Replies: 14
Views: 751


Sorry to hear of the inkjet troubles! My ancient HP650C Plotter is still chugging along, as I do quite a bit of roll printing. Cartridges for this 1990-era machine are the problem. Many, many suppliers sell old reman cartridges, or out of date originals, so finding ones that work is a constant searc...

 Forum: General Discussion   Topic: USB Power

 Post subject: Re: USB Power
Posted: Tue Oct 10, 2017 6:06 am 

Replies: 7
Views: 418


From the wiki page that Janitor Tzap referenced:

Electrical
Signal 5 V DC
Max. voltage
5.00+0.25
−0.60 V[a]
5.00+0.25
−0.55 V (USB 3.0)
20.00 V (PD)
Max. current
0.5 A (USB 2.0)
0.9 A (USB 3.0)
5 A (BC 1.2)
3 A (type-C)
Up to 5 A (PD)

 Forum: General Discussion   Topic: Dead Dell Laptop

 Post subject: Re: Dead Dell Laptop
Posted: Fri Aug 18, 2017 4:33 pm 

Replies: 4
Views: 579


Good info! Thanks! Next comes connector replacement!

 Forum: General Discussion   Topic: Dead Dell Laptop

 Post subject: Dead Dell Laptop
Posted: Fri Aug 18, 2017 10:01 am 

Replies: 4
Views: 579


Well, not entirely dead, but battery will not charge. Dell Inspiron 8500 laptop, many years old, but reliable until now. Works on AC, but battery does not charge, all of a sudden. Tried an old, but still OK battery and same result- doesn't charge. Also, on power up, get the message, "AC Power A...

 Forum: General Discussion   Topic: Direct backlight LED strips in 48" Samsung TV...

Posted: Thu Aug 17, 2017 7:07 am 

Replies: 7
Views: 563


Maybe the ebay seller could answer that. 2-3 volts each is typical of LEDs, but series/parallel wiring will dictate what power source is needed. Could always power it up starting low, slowly increase voltage until they get a little too warm? Flat panel ceiling lamp, eh? Nice project! I'd like one of...

 Forum: General Discussion   Topic: Master Magnet

 Post subject: Re: Master Magnet
Posted: Sun Aug 13, 2017 7:29 pm 

Replies: 2
Views: 301


Nope- not in N & V that I've seen. What I haven't seen demonstrated is one more polarity reversal beyond levitation- and that causes the attraction. It's clever looking as to how Leonerd arranged that in his Master Magnet, just would like to see it work before building it. Anyone want to explain...

 Forum: General Discussion   Topic: Master Magnet

 Post subject: Master Magnet
Posted: Sun Aug 13, 2017 3:27 pm 

Replies: 2
Views: 301


Some years ago, there was an article called, "Master Magnet", by Leonard Crow. It was instructions on how to build a magnet, powered by 120 VAC, that could pick up Non-Ferrous metals like copper and aluminum. http://www.rexresearch.com/mrmagnet/mrmagnet.htm Has anybody tried building such ...

 Forum: Up For Grabs   Topic: Solar Tabbing Ribbon

 Post subject: Solar Tabbing Ribbon
Posted: Sun Aug 13, 2017 8:43 am 

Replies: 0
Views: 329


Have a large quantity of the tabbing ribbon used to build your own photovoltaic modules. Several different sizes of solder tinned copper ribbon- rolls are many, many meters in length! Let me know if interested, and I'll provide sizes and Ulbrich's part numbers. All still factory packaged. Willing to...
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