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 Forum: General Discussion   Topic: Nuts & Volts issues...

 Post subject: Re: Nuts & Volts issues...
Posted: Sat Jan 13, 2018 4:00 pm 

Replies: 2
Views: 79


I shipped years of the tabloid sized N&V to another member years ago.
Do I miss them....except for the nostalgia value, not too much.

But I do treasure my first issue of Popular Electronics!

 Forum: General Discussion   Topic: LOREX LW2742 Wireless Monitor........

Posted: Sat Jan 13, 2018 3:56 pm 

Replies: 10
Views: 98


The short answer is.... With mass production, and cheap labor, in most cases, it is cheaper to build than to repair.

 Forum: Computer Programming   Topic: File question

 Post subject: Re: File question
Posted: Tue Jan 09, 2018 10:51 pm 

Replies: 5
Views: 45


Hi, No compression or encryption. It is an older Maxtor network drive. All systems and software have no problem accessing the files. I feel it is because it is a network drive and maybe here once was a version to handle file sharing and locking. I am not tying to use multiple users, just to access t...

 Forum: Computer Programming   Topic: File question

 Post subject: Re: File question
Posted: Tue Jan 09, 2018 4:03 pm 

Replies: 5
Views: 45


Hi Dale,
I'll try that tomorrow but I suspect it will be the same. The file associations work because clicking the file in the NAS file launches the data base program, then it crashes while loading.
Will try anyway and let you know.
Thanks!

 Forum: Computer Programming   Topic: File question

 Post subject: File question
Posted: Tue Jan 09, 2018 1:06 pm 

Replies: 5
Views: 45


I am using a database that can open and read it's files from a USB drive or the same files copied to the local hard drive, but it will not read the same group of files from a NAS (network attached storage) drive. Windows explorer can access these, and all other files, on the NAS drive. and other sof...

 Forum: General Discussion   Topic: LM 1084/338/317/etc... voltage drop at < 1A

Posted: Fri Jan 05, 2018 5:37 am 

Replies: 23
Views: 219


From my first post......
"Possibly the breadboard connections are not perfect, or too small, check for voltage drop across the breadboard connections."
:mad:

 Forum: General Discussion   Topic: LM 1084/338/317/etc... voltage drop at < 1A

Posted: Thu Jan 04, 2018 9:11 pm 

Replies: 23
Views: 219


FYI The common transformer does not regulate. The label voltage is at the labeled current. At a lower current it will be higher voltage. At higher current the voltage will go down until the VA rating of the transformer is exceeded then the smoke gets out. I would expect the secondary voltage to be h...

 Forum: General Discussion   Topic: really old 4700uF capacitors

Posted: Wed Jan 03, 2018 10:43 pm 

Replies: 9
Views: 111


wOW! CeaSar I never considered that antenna polarity reversing idea. I did hook it up once to a TV rabbit ears antenna and it got crackly sound from 'The Jack Benny Program'. When I reversed the cabinet, guess what! It started talking sdrawkcab. An old county western ballad was on and,....his girlfr...

 Forum: General Discussion   Topic: LM 1084/338/317/etc... voltage drop at < 1A

Posted: Mon Jan 01, 2018 6:47 pm 

Replies: 23
Views: 219


If you described the diode connections as you have them connected, it appears they are wrong. Look at this: http://www.physics-and-radio-electronics.com/electronic-devices-and-circuits/rectifier/fullwaverectifier.html If your explanation was wrong and they are correctly connected, then it seems you ...

 Forum: Up For Grabs   Topic: Wanted : electret condenser microphone capsules...

Posted: Mon Jan 01, 2018 3:44 pm 

Replies: 9
Views: 605


Don't know what you paid for the mics, but look at this:
http://www.taydaelectronics.com/microphones/condenser-microphone-2-2k-ohm-1-5v.html
$0.25 Ea!

 Forum: General Discussion   Topic: really old 4700uF capacitors

Posted: Mon Jan 01, 2018 3:39 pm 

Replies: 9
Views: 111


I restored an old RCA Cathedral style radio years ago. I replaced all the capacitors with new ones.
When I fired it up, It played well but all I could get was modern music :???: .

(Don't be critical! At least it's another post...)

 Forum: General Discussion   Topic: Use a transformer as switch (relay) ?

Posted: Mon Jan 01, 2018 3:34 pm 

Replies: 0
Views: 52


I am building a simple device, to operate a solenoid air valve with a small micro switch. Because I want small flexible wires to the switch, and the switch will be in the operator's hand, for safety I want low voltage on the switch circuit. Unfortunately, line voltage valves are all I have in stock....

 Forum: General Discussion   Topic: Very unusual desoldering method...

Posted: Mon Jan 01, 2018 3:20 pm 

Replies: 6
Views: 90


That sounds like an idea for single parts that's worth trying. For whole board salvage, the best I've found is to hold the board, component side down, over an empty waste can. Heat the solder side with a heat gun, a small section at at a time. When the solder just starts to melt, tap the board brisk...

 Forum: General Discussion   Topic: Greetings!

 Post subject: Re: Greetings!
Posted: Wed Dec 27, 2017 5:24 pm 

Replies: 5
Views: 127


Mr.Al, Indeed we are curious creatures. Most of what I produce needs a big variety of locally unavailable parts, and many wholesalers make it encouraging to buy more then needed, so the inevitable junk box bulges. I have bought storage boxes, made labels and then bought shelving; all at great expens...

 Forum: General Discussion   Topic: unmarked transformer

Posted: Wed Dec 06, 2017 2:36 pm 

Replies: 8
Views: 411


I forgot to mention in the previous post that if a 120 volt light bulb, like 100W is placed in series with the line power, any connections, even a dead short, will not hurt the transformer or blow a fuse. The lamp will be bright if the connection is shorted, or made to a low voltage secondary, and d...
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