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 Forum: Q&A   Topic: Text Messaging When in Need - February 2017

Posted: Mon Feb 27, 2017 12:45 pm 

Replies: 1
Views: 128


Perhaps an application for the "Verve"-
https://www.kickstarter.com/projects/54 ... r-computer

 Forum: General Discussion   Topic: 9 volt Duracell Procell

 Post subject: Re: 9 volt Duracell Procell
Posted: Sun Feb 12, 2017 12:56 pm 

Replies: 6
Views: 280


Looks like LR44's have 150 maHr rating- even less than the ProCell.
Two parallel banks of them (to make a 9 volt) would outlast the ProCell, but oh, the hassle. :razz:

 Forum: General Discussion   Topic: 9 volt Duracell Procell

 Post subject: Re: 9 volt Duracell Procell
Posted: Sat Feb 11, 2017 8:03 pm 

Replies: 6
Views: 280


Thanks guys-
Space is an issue in this application.
If not Duracell or Energizer, what is recommended for a better alkaline 9 volt? (Lithium disposables too expensive)

 Forum: General Discussion   Topic: 9 volt Duracell Procell

 Post subject: 9 volt Duracell Procell
Posted: Wed Feb 08, 2017 6:30 am 

Replies: 6
Views: 280


Been a big fan of Duracell for many years, but these are a disappointment. Just don't last as long in 50 mAmp application.
Going back to Energizers!
Anybody else have a review for this cell?

 Forum: General Discussion   Topic: Articles I highly enjoyed...

Posted: Mon Jan 23, 2017 10:04 am 

Replies: 2
Views: 198


Nice collection! :)

 Forum: General Discussion   Topic: 120v to 4800 v transformer

Posted: Thu Jan 12, 2017 11:46 am 

Replies: 14
Views: 446


If you have access to a variable AC supply, ramp up the primary voltage while watching the secondary voltage to confirm the markings. Maybe a Variac? Even a lamp dimmer would give some idea of the markings veracity. Measure RMS in and RMS out.

 Forum: General Discussion   Topic: Craftsman Multimeter

 Post subject: Re: Craftsman Multimeter
Posted: Sat Dec 31, 2016 4:05 pm 

Replies: 9
Views: 332


Nice to hear from you again Mr. Al! I dug this old Craftsman DMM out to complement some Flukes I use regularly. Haven't used this old "Crapsman" for years. It has 4 buttons across the top: Power Range-H Beep/diode check Data-H What is Range-H for? I think Data-H holds the last (or highest?...

 Forum: General Discussion   Topic: Craftsman Multimeter

 Post subject: Re: Craftsman Multimeter
Posted: Wed Dec 28, 2016 1:31 pm 

Replies: 9
Views: 332


Thanks but there's something wrong with that ad. It actually leads to a Klein meter. No joy.

 Forum: General Discussion   Topic: Craftsman Multimeter

 Post subject: Craftsman Multimeter
Posted: Tue Dec 27, 2016 4:15 pm 

Replies: 9
Views: 332


Looking for the operating manual for an old autoranging multimeter:
Craftsman Autoranging Multimeter 82028

Googled, but couldn't find it. It's maybe 15-18 years old.

TIA!

 Forum: General Discussion   Topic: A grounding 'feel good'

 Post subject: Re: A grounding 'feel good'
Posted: Mon Nov 21, 2016 1:55 pm 

Replies: 5
Views: 215


Have you tested it? Maybe the plastic is conductive! :razz:

 Forum: General Discussion   Topic: A grounding 'feel good'

 Post subject: Re: A grounding 'feel good'
Posted: Mon Nov 21, 2016 12:09 pm 

Replies: 5
Views: 215


No doubt made in a country where looks trumps function. :(

 Forum: General Discussion   Topic: 12VDC FROM 120 VAC (Solved)

Posted: Tue Nov 15, 2016 1:54 pm 

Replies: 12
Views: 437


Now I see them everywhere-
http://www.digikey.com/product-detail/en/rohm-semiconductor/BP5039B12/BP5039B12-ND/658557

 Forum: General Discussion   Topic: 12VDC FROM 120 VAC (Solved)

Posted: Sun Nov 06, 2016 5:56 am 

Replies: 12
Views: 437


Probably saw some of these transformerless AC-to-DC circuits:
http://www.brighthubengineering.com/diy-electronics-devices/77929-make-a-transformerless-power-supply/#imgn_2

 Forum: General Discussion   Topic: Need a Schematic for: NEWCOMB Model: B-100A AM Radio

Posted: Thu Oct 06, 2016 12:00 pm 

Replies: 13
Views: 633


I'd go for the fix with this: http://www.ebay.com/itm/OT8SE-Single-Ended-Output-Transformer-8VA-5K-7Kohm-3-2-8-16-45mA-imported/161821388842?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D39242%26meid%3D2db3fe53228d474aa2bb1d1ff8a64d2b%26pid%3D100005%26rk...

 Forum: General Discussion   Topic: Need a Schematic for: NEWCOMB Model: B-100A AM Radio

Posted: Thu Oct 06, 2016 5:59 am 

Replies: 13
Views: 633


If that is a 6V6 audio output tube, a 5,000:3.2 ohm output transformer will be fine.
Break out a drill to remove the spot welds, and insert screws/nuts to mount the new transformer.
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