T&L Publications

Hi !<p>A 78M09 voltage regulator will do it.<p>Miguel

Hi Ian. That is "balanced to unbalanced", in RF terms, would be a balun transformer. In audio stereo terms, it is still two -audio- transformers with one lead of each secondary tied together as common for the headphones. I do not know which IC you have in mind, but the data sheet should te...

Hi Dacflyer.<p>I will try to guess this one... As they are LED's, I suppose their leads are cut precisely at ¼ wavelenght and function as a dipole antenna. The high efficiency in new led's helps too. Try the highest efficiency LED you can find, the one you make light with the least current, and clip...

Hi !
I would say they are neon or other gases bulbs, turning on by the RF field.<p>You like lights ? Clip the leads off some neon bulbs an put them on top of a useless compact disk, all this on top of a cup with some water; in your microwave oven...<p>Miguel

Hello .<p>Here you have it :<p>http://www.jcwhitney.com/product.jhtml? ... 26&BQ=jcw2<p>Enjoy your radio,<p>Miguel
'62 Caddy

Hello.<p>The interfering noise can reach your amateur radio equipment via the house power lines or via antenna; or both. You must find first the offending path to tackle the problem. Try operating the HF radio with an automobile battery with no connections at all to mains. If you still get the noise...

Hi !<p>I have been digging for the precise information, but cannot find my fax service manual I purchased from Canon. I have the invoice with the right phone numbers somewhere. Just remember it was very easy: Call Canon asking for the right phone number to order service manuals. Should work for you ...

Hello.<p>As expressed above, some extra information could help. If the location of a person in a building is reduced to which room instead of what part of a room (resolution) there is a way that comes to mind, BUT, every person must wear some sort of identification to discern who and where. That cou...

Hi Mark.<p>It is a big can of worms, spiders and bugs.<p>Not to answer your question but for you to sense how this ball game is played, visit:<p>http://www.starrperformance.com.au/efilivev5/index.htm<p>Enjoy,<p>Miguel

Hi Brettn.<p>>>>>>>>>>> does anyone know of a circuit that I can use to probe electronics that will protect my sound card from too high of a voltage or too much amperage?<<<<<<<<<<p>For this, you may use 1n4007 diodes pairs head to toes; only one will clip signals at 0.7Vpp; if you use two in series...

Hi OKjello.<p>Here it is:<p>http://polly.phys.msu.su/~zeld/oscill.html<p>The good thing is it really works. Enjoy,<p>Miguel

Hi Matthew.<p>Almost any defunct computer motherboard will be a glad donor for such low dropout voltage regulator. They are usually TO-220 with a small heatsink, and can supply up to 3 Amperes.<p>Computer power supplies yield 5V, but many chips on the mainboards run on 3.3V.<p>Miguel

Hi Russ.<p>.>>>>> Can someone tell me how the central office knows the phone is off hook and should stop ringing? How much current can I draw from the line? <<<<<<<<<p> In the central office (CO), the 48 Volt battery is fed to your line pair trough sensitive relay coils in SERIES with it.<p>With you...