Search found 543 matches
- Tue Apr 11, 2006 6:14 pm
- Forum: General Discussion
- Topic: What watt meter?
- Replies: 6
- Views: 4474
- Tue Apr 11, 2006 6:05 pm
- Forum: General Discussion
- Topic: Help in BJT circuit - How to find Ic - Vce Curve of NPN
- Replies: 3
- Views: 3329
- Sat Mar 04, 2006 6:10 pm
- Forum: General Discussion
- Topic: March Issue
- Replies: 10
- Views: 4601
Re: March Issue
I agree that microcontrollers are the way of the future, but it is an analog world and you have to know how to do the interface. I have been doing analog design for 40+ years and am just beginning to learn how to use uCs.
- Wed Feb 15, 2006 3:58 pm
- Forum: General Discussion
- Topic: Magnetic Amplifier
- Replies: 6
- Views: 3038
Re: Magnetic Amplifier
You can get cores to operate above 100kHz, so heating at 20 kHz should not be a problem. Have you visited the Magnetics website? www.mag-inc.com
- Tue Feb 14, 2006 2:27 pm
- Forum: General Discussion
- Topic: XR-2242
- Replies: 4
- Views: 2950
Re: XR-2242
what do you want to do with it?
- Tue Feb 14, 2006 2:25 pm
- Forum: General Discussion
- Topic: Magnetic Amplifier
- Replies: 6
- Views: 3038
Re: Magnetic Amplifier
I have seen a mag amp regulated power supply, the only semiconductors in it were diodes. It is too expensive for most applications, except military.
- Mon Jan 16, 2006 12:51 pm
- Forum: General Discussion
- Topic: Battery replacement
- Replies: 4
- Views: 2389
Re: Battery replacement
My battery charger has a switch for nicad or nhmi, I don't know what the difference is.
- Sat Jan 14, 2006 3:57 pm
- Forum: General Discussion
- Topic: Tek 2430 scope no display problem
- Replies: 5
- Views: 3020
Re: Tek 2430 scope no display problem
You have 6vac filament voltage but is the filament lighted? You should see a light at the socket end of the tube.
- Fri Dec 23, 2005 4:39 pm
- Forum: General Discussion
- Topic: the best procedure to check ultra fast diode
- Replies: 5
- Views: 3069
Re: the best procedure to check ultra fast diode
Measure the forward and reverse resistance. The forward resistance will be low, under 1K, depending on the meter type and sensitivity. The reverse resistance should be open circuit unles you have a very sensitive meter.
- Tue Mar 15, 2005 6:54 pm
- Forum: General Discussion
- Topic: phase shift
- Replies: 3
- Views: 2605
Re: phase shift
A Johnson counter, divide by 4, has outputs that are 90 degrees. You could switch between them.
- Tue Feb 15, 2005 3:16 pm
- Forum: General Discussion
- Topic: impedance comverter
- Replies: 11
- Views: 5011
Re: impedance comverter
There are circuits that use a capacitor to simulate an inductor and vice-versa. Is that what you mean by "impedance converter"?
- Fri Feb 11, 2005 8:51 pm
- Forum: General Discussion
- Topic: Resistance meter question?
- Replies: 6
- Views: 3630
Re: Resistance meter question?
A 3 1/2 digit ohmmeter only costs a few bucks, why bother making your own?
- Wed Feb 02, 2005 4:57 pm
- Forum: General Discussion
- Topic: BPF design
- Replies: 3
- Views: 2299
Re: BPF design
I have use this equation for solonoid coils with good success: L (microhenries) = ((n^2)*r^2)/(9*r + 10*l) n = number of turns r = radius of coil (1/2 diameter) l = length of winding<p>Keep in mind that the leads of the coil are also part of the inductance which is not included in the equation!
- Thu Jan 27, 2005 6:14 pm
- Forum: General Discussion
- Topic: Inductance Tester
- Replies: 2
- Views: 1916
Re: Inductance Tester
You will need a multimeter. Use a 24 volt transformer for a voltage source. Connect the inductor in series with a variable resistor across the voltage source. Adjust the resistor until the voltage across the inductor is equal to the voltage across the resistor. Measure the resistor, now calculate th...
- Tue Jan 25, 2005 10:36 am
- Forum: General Discussion
- Topic: signal generator
- Replies: 7
- Views: 4005
Re: signal generator
Why do you want to do that?