Join Date: Aug 2007
Location: Doyline, Louisiana, USA
DIY Isolation Transformer to Audio Cable
Help Meese, where are you? I have a slight intermittant buzz from GPS/MP3/XM radio from Zumo 550 to Autocom Pro Avi via 3 wire audio cable. Was fine when autocom was powered from acc port under seat, but I moved it to tankbag and now powered from acc/port at front.
I have in hand the Radio Shack Isolation Transformer #273-1374 $3.99. The cable has 2 audio wires and the shielded ground, the transformer has only 2 from each winding.
Which wires of the transformer do I put to where?
I have a little trial and error experience, spent all day yesterday hooking another transformer up to the Escort 8500 x50 but it is mono. RD works fine now, loud and clear no buzz.
I only have one cable left and do not want to destroy it for the GPS. Thanks for your help!
I have a feeling it is the tip and shield ground and continue the middle thru but no electronics expert here for sure.
12 Super Tenere 1200 (coming soon)
10 MTS1200 standard (riding)
09 Monster 696 (wife's ride)
Last edited by dhanson; Jun 26th, 2008 at 10:14 am.