"Gerry" <[EMAIL PROTECTED]> made an utterance to the drakelist gang ---------------------------------------------------------------------- By their very nature, switching power supplies create both radiated and conducted emissions. How much noise they produce is largely a function of the topology used and the design of the enclosure and filtering. You can find some pretty good ones to use for communications gear just as it is possible to get a real bad one. The safest thing to do is go with an analog power supply for all communications gear or a switching supply of known quality and origin. Modern switching supplies can cost less, generate less heat due to higher efficiency, and weigh considerably less than old fashioned analog ones. I now use a PS-7 with my TR-7. Before that I used a 40 amp switcher that didn't emit any noise within the Ham bands but was useless for SWL'ing.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim DiMauro Sent: Monday, March 12, 2007 2:54 PM To: David Drake; [email protected] Subject: Re: [drakelist] Power Supply for TR-7(a) Jim DiMauro <[EMAIL PROTECTED]> made an utterance to the drakelist gang ---------------------------------------------------------------------- I've used a switcher with my TR-7 for as long as I've owned it (about three years) and I've never had either a noise or performance problem. I can't imagine why it wouldn't be recommended. I'd also like to hear the details as to why a switching supply might not be recommended for the TR-7 if anyone can provide them. FWIW, my supply is an Astron RS-30M. Jim W2BVM --- David Drake <[EMAIL PROTECTED]> wrote: > Hi all, > I'm interested in hearing the pro's and con's > regarding using a switching power supply with a > TR-7(a). I remember this question coming up on the > Sunday PM technical net some time ago, but forgot > the details. > As I recall, it is not recommended, but don't > remember why. > Thanks > David > Wd9cmd ____________________________________________________________________________ ________ Now that's room service! Choose from over 150,000 hotels in 45,000 destinations on Yahoo! Travel to find your fit. http://farechase.yahoo.com/promo-generic-14795097 ---------------------------------------------------------------------- Submissions: [email protected] Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net ---------------------------------------------------------------------- ---------------------------------------------------------------------- Submissions: [email protected] Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net ----------------------------------------------------------------------
