Search found 354 matches

by cato
Thu Jun 05, 2008 7:52 am
Forum: General Discussion
Topic: Converter Box Recommendations?
Replies: 4
Views: 2664

Over 400 views and no replies? Really? None of you have any thoughts on the available converter boxes?

For what its worth, I'm hoping the APEX Digital DT250 becomes available before my coupons expire...
by cato
Wed Apr 30, 2008 11:58 am
Forum: General Discussion
Topic: TV Digital Converter Box Coupons & Sales Tax
Replies: 7
Views: 2719

Philba, Some of the converter boxes, (an allegedly available RCA DTA 800B1 for example) support something called smart antenna, by which the box can select appropriate antenna phasing to change directivity on a channel by channel basis. Said smart antennas run about 80 bux or at least the ones I've ...
by cato
Wed Apr 30, 2008 7:56 am
Forum: General Discussion
Topic: Converter Box Recommendations?
Replies: 4
Views: 2664

Converter Box Recommendations?

Have you guys figured out which Digital TV Converter Box has the best receiver and feature set yet? I got coupons burning a hole in my pocket! I've Been trying to find and RCA DTA 800B1 (not the 800, 800A or 800B). Walmart is supposed to have one flavor, but the two I went to last night only have Ma...
by cato
Sun Nov 12, 2006 5:49 am
Forum: General Discussion
Topic: Diode Dilemma?
Replies: 5
Views: 1999

I think upon closer inspection you will see that reverse voltage is not free. It comes at the expense of some other parameter; junction capacitance for example.

Accordingly, there are many applications where the 50V part will work and the 1000 V part will not.
by cato
Sat Oct 28, 2006 12:00 pm
Forum: General Discussion
Topic: D Cell Battery Leak Clean up
Replies: 2
Views: 1085

D Cell Battery Leak Clean up

Does know a way to clean up that brown pasty goop that sometimes oozes from old batteries? Backing soda? Lemon Juice? Coke a Cola? Sand blasting?
by cato
Tue Oct 24, 2006 3:06 pm
Forum: General Discussion
Topic: What do you call this, SWR or what?
Replies: 4
Views: 1443

The SWR is sort of a side effect of the, and therefore an indication of the resonance mismatch and apparent impedance mismatch caused by the collapsed antenna. If you think of the antenna as a pipe being filled and drained with/of water you might be able to envision the fill pump turning on and off ...
by cato
Mon Oct 16, 2006 3:14 pm
Forum: General Discussion
Topic: Eton/Grundig S350 service manual or just schematic needed
Replies: 7
Views: 2556

speaking of shortwave radios, and such,, i have here a really old german table top radio 3D Klang - 3035 its a nice set..but all you can get on them now days is am or fm, i love its rich sound and green tuning eye slit.. are the short wave radio stations going away more and more ? i do not seem to ...
by cato
Sat Oct 14, 2006 5:04 am
Forum: General Discussion
Topic: Eton/Grundig S350 service manual or just schematic needed
Replies: 7
Views: 2556

Grundig_Tecsun_Eton_garbage

If this isn't the news group I remember, its similar: http://groups.yahoo.com/group/Grundig_Tecsun_Eton_garbage/ Here's the description of the group: Description What is lacking, is an open forum to freely express frustrations with today's low-quality, over-hyped shortwave receivers (e.g., Grundig S...
by cato
Sat Oct 14, 2006 4:57 am
Forum: General Discussion
Topic: Eton/Grundig S350 service manual or just schematic needed
Replies: 7
Views: 2556

Grundig/Eton Three Drifty

I don't have any documentation for you. However, I was recently shoping for a nice shortwave radio and so investigated the 350 (I like its looks). During my investigation I came across this review, that indicates that drift is a common problem with this radio: http://www.radiointel.com/review-Grundi...
by cato
Sun Aug 27, 2006 4:47 am
Forum: General Discussion
Topic: basic capacitor question?
Replies: 25
Views: 5044

How does a fly wheel maintain flow? What flow?

What does mass have to do with an inductor?

What does kenetic energy have to do with an inductor?
by cato
Sat Aug 26, 2006 4:40 pm
Forum: General Discussion
Topic: basic capacitor question?
Replies: 25
Views: 5044

Inductor Water Analogy: replace a section of the pipe with a soft rubber tube-->increase pressure the tube expands so flow out the far end doesn't increase right away-->decrease the pressure the tube collapses so the flow out the other end doesn't drop off right away... this is also known as the wee...
by cato
Sat Aug 19, 2006 12:57 am
Forum: General Discussion
Topic: Battery Charged Indicator........
Replies: 24
Views: 5129

The charger might be over charging your batteries, but I doubt it. Your NiCads are dieing because you don't let them drain to dead. Nicads want to be drained. Silly you, want to have your phone operational at all times :shock: , so you keep them charged. Thats whats killing them. They need to be dee...
by cato
Sun Jul 30, 2006 11:29 am
Forum: General Discussion
Topic: Analog multiplex switch help needed
Replies: 5
Views: 1421

What are the respective output resistances of your 3 signal sources? I'm guessing that the 2.5V signal has significantly more resistance associated with it than the other two signals. Accordingly, it is being divided down by the input resistance of the multiplexer/
by cato
Fri Jul 28, 2006 4:55 am
Forum: General Discussion
Topic: A/D Circut design question
Replies: 5
Views: 1525

Blinking......

Could it be that the President is working on his car?
by cato
Thu Jul 27, 2006 3:24 pm
Forum: General Discussion
Topic: What is a "TRIAC"??
Replies: 8
Views: 2057

You don't seem to have gotten the simple answer you were hoping for, so I'll give it a try: Tricas are a solid state means for providing a High Voltage (eg. 120, 220) contact closure output for digital electronic based systems. They replace relay contacts. As you have learned, they are somewhat more...