In a message dated 10/8/2008 11:03:32 A.M. Pacific Daylight Time, [EMAIL PROTECTED] writes: Hi all,
Is there any problem using a VOM instead of a DMM to perform the resistance checks while building the K3? I have yet to make it fully into the modern era and to that end, do not have a DMM. Tnx es 73, Jim W5QM _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: _http://www.elecraft.com_ (http://www.elecraft.com) Generally it is not a problem, if you are checking resistors. The area you can get into trouble is when you have semiconductors connected to the circuit - Elecraft Rigs are loaded with them. The problem can come from most VOMs not being able to limit the current applied to the circuit under test. Even at low voltage you could apply a voltage with enough current to bias a transistor to a destructive level. Most DMMs use a high impedance amplifier on input to reduce current flow to/from the meter. The resistance circuitry can also be made to sample E/I data at low enough levels to provide resistance measurement at much lower current and voltage. IMO, with many DVM/DMMs on the market at low cost, it's probably not worth the risk. Al WA6VNN **************New MapQuest Local shows what's happening at your destination. Dining, Movies, Events, News & more. Try it out! (http://local.mapquest.com/?ncid=emlcntnew00000001) _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
