Hi Skipp, I am concerned about noise from even the top line switching supplies to my equipment and the other equipment in the tower site. I have heard it said that placing a battery (over the supply, on the supply, somewhere) will remove any of the noise. In your experience does this work and if so how is the battery configured on say a 70 amp switching supply?
Thanks JIM KA2AJH _____ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of skipp025 Sent: Sunday, January 14, 2007 12:10 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Switching Power Supply vs. Astron Etc. > If the supply you are using is fine why change? Yes, you > would gain some amperage capacity. Relative example... A room full of Motorola Repeater Stations in non constant service costs about $30/month each to operate. Put the repeater into lock to talk mode (IRLP or Echolink) and the energy cost rises by almost a third (typical). One of the energy soaks is the well designed and constructed transformers within the repeater power supplies. Replacing the hungry Motorhead Power Supplies cuts at least 1/2 off the power bill, which is much nicer when you're the one having to pay it. > However, switching supplies are inherently noisy. You > could experience problems from these noises. I realize > we are not talking about HF. But, it is possible to wind > up with a problem you don't have now. Many of the common 13.8 vdc switchers sold to the ham market will hose up at least the 160 meter ham band no problem, which is just above the am broadcast band I have on the shop when XM is stale. > If that 50 amp supply is fine, I see no advantage in the change. > Dave Cheers Dave, skipp
