"Jim Shorney" <[EMAIL PROTECTED]> made an utterance to the drakelist gang ---------------------------------------------------------------------- On Tue, 26 Jun 2007 10:01:06 -0400, Garey Barrell wrote:
>"I" would connect a good ground between the SP-75 and TR-7. My years >as an RFI/EMC Engineer with NASA convinced me that the first step when >RF is afoot is to have everything connected together with low impedance >ground straps. Multiple ground paths can cause problems too, but in >this case I would say that having a low Z connection from the SP-75 to >the TR-7 is the best way to keep RF out of the audio. Let the SP-75 get >it's ground return through the TR-7 ground return rather than directly >to the supply. Make sure the wire between the supply and the TR-7 is >big enough. The TR-7 can draw a LOT of current, more than modern >transceivers, and voltage drops in the ground lead can cause all kinds >of problems. Good thoughts, Garey, thanks. My power cable is a custom build - I used GE primary wire from a Rangr mobil cable for the PA feed, it looks to be around #8 or better. The low power feed is some good, hefty mobile radio power wire as well, but smaller. No dial light dimming on peaks with this cable. 73 -Jim -- TR7/RV7, TR6/RV6, T4XC/R4C, L4B, NCL2000, SB104A, R390A, GT550A/RV550A, HyGain 3750 - all vintage, all the time! ---------------------------------------------------------------------- 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 ----------------------------------------------------------------------
