Search found 25 matches

by qdgjcl
Wed Mar 09, 2005 9:33 am
Forum: General Discussion
Topic: Need help with center tap Xformer
Replies: 70
Views: 10047

Need help with center tap Xformer

I need help understanding how current flows in a center taped transformer. If the primary side has positive on the top and negative on the bottom then primary current would flow counterclockwise for this cycle. On the secondary side the top would be positive and the bottom would be negative. On the ...
by qdgjcl
Mon Apr 19, 2004 2:43 pm
Forum: General Discussion
Topic: TV Trouble 2
Replies: 3
Views: 909

Re: TV Trouble 2

Hi Edd there has been a small change since the last post. The original TV is gone, but I was given another Zenith that has the same problem. It’s a later model 1995 (SR2573DT), but I think the inside is the same. I went back through your previous posts and did everything you said. I found the Identi...
by qdgjcl
Mon Mar 01, 2004 3:49 pm
Forum: General Discussion
Topic: TV Trouble 2
Replies: 3
Views: 909

TV Trouble 2

I posted a topic about a year ago about a Zenith TV I was trying to troubleshoot. I had to put it on hold to take care of other things. Now I am ready to fix it. Edd Whatley was helping me and I would like to know if Edd is still available. <p>Thanks, <p>Brad.
by qdgjcl
Fri Oct 03, 2003 8:38 am
Forum: General Discussion
Topic: looking for old power supply manuals or information
Replies: 2
Views: 782

looking for old power supply manuals or information

Does anyone know where I can get a manual or any kind of information for a Power Design model 6050A power supply? <p>Thanks,<p>Brad
by qdgjcl
Thu Oct 02, 2003 3:58 pm
Forum: General Discussion
Topic: older power supply problems
Replies: 3
Views: 596

older power supply problems

I just got an older Power Designs Power Supply Model 6050A. When I turn it on the fault light flashes and when I check the output voltage with my meter I get nothing as I turn the voltage up. On the back of the unit it has some instructions and mentions the flashing fault light and something about o...
by qdgjcl
Thu Aug 07, 2003 7:29 am
Forum: General Discussion
Topic: Light-dependent resistor
Replies: 8
Views: 1236

Re: Light-dependent resistor

The book I was reading is Applied Electricity and Electronics lab manual by Bayne.<p>Brad
by qdgjcl
Wed Aug 06, 2003 10:48 am
Forum: General Discussion
Topic: Light-dependent resistor
Replies: 8
Views: 1236

Re: Light-dependent resistor

Are photoconductive cells the same thing?<p>Brad
by qdgjcl
Wed Aug 06, 2003 9:22 am
Forum: General Discussion
Topic: Light-dependent resistor
Replies: 8
Views: 1236

Light-dependent resistor

Can someone tell me what a Light-dependent resistor is? It was mentioned in a book I was reading, but the book doesn't say what it is. It also mentions its light coefficient. What's that?<p>Thanks for any help,<p>Brad
by qdgjcl
Wed May 28, 2003 9:30 am
Forum: General Discussion
Topic: TV Trouble
Replies: 8
Views: 1336

Re: TV Trouble

Thanks for the responses. I started to troubleshoot the TV everything checked out, but I got stuck at the point where you said to use the ground of the tuner for reference. I don't know where the tuner is. Please send help.<p>Thanks,<p>Brad
by qdgjcl
Tue May 06, 2003 2:12 pm
Forum: General Discussion
Topic: TV Trouble
Replies: 8
Views: 1336

Re: TV Trouble

TO Edd Whatley, SORRY ABOUT GETTING BACK THIS LATE. I HAVE BEEN GONE. THE MODEL NO IS SR2573DT AND THE YEAR IS 1995. WHAT IS THE GIANT MODULE?
by qdgjcl
Mon Apr 28, 2003 1:20 pm
Forum: General Discussion
Topic: TV Trouble
Replies: 8
Views: 1336

TV Trouble

I have a ten year old Zenith TV and the picture started shrinking, and would then pop back up. Now the picture is reduced to a small thin, very bright line. There is still sound and it looks like you can see some movement in the line. Does anyone know what the problem is and if it can be fixed?<p>Th...
by qdgjcl
Wed Mar 19, 2003 3:17 pm
Forum: General Discussion
Topic: Electronic Supplier
Replies: 5
Views: 996

Electronic Supplier

Can anyone recommend a good supplier for electronics and small motors like 6-12 volt dc? <p>Thank you,
Brad
by qdgjcl
Tue Mar 18, 2003 11:38 am
Forum: General Discussion
Topic: Differences in transistors
Replies: 7
Views: 1181

Differences in transistors

Is there a difference between, MPS3904 and 2N3904 transistors?<p>Brad
by qdgjcl
Fri Mar 07, 2003 7:16 am
Forum: General Discussion
Topic: Looking for electronic components
Replies: 6
Views: 1049

Looking for electronic components

I’m looking for some electronic components that are mounted on pieces of plastic, and the leads are soldered to posts. The components snap onto a board and then you can hook wires up to the posts to build a circuit. Hickok made the system I saw, but they do not make them anymore. I believe that ther...
by qdgjcl
Thu Feb 20, 2003 2:24 pm
Forum: General Discussion
Topic: Does a choke look like a resistor?
Replies: 3
Views: 858

Does a choke look like a resistor?

Does a choke look like a resistor? I have what looks like a green resistor and has color bands; brown, brown, black, gold. I was told that it is a 33mH choke. Is this true, and if it is, how do read them? <p>Thank you,<p>Brad