stacysound Posted December 14, 2019 Report Share Posted December 14, 2019 I've built cables for years and suddenly find myself doubting this simple cable. I’m going to built a cable for scratch audio Comtek/R1a hop to camera - 3.5mm to male XLR. I might use Comtek, or R1a. A Tip Sleeve would be preferred over a Tip Ring Sleeve because of the Comtek, yea? 3.5mm Tip to XLR Pin 2 3.5mm Sleeve to XLR Pin 1 Float pin 3 or ground it? TIA Quote Link to comment Share on other sites More sharing options...
John Blankenship Posted December 14, 2019 Report Share Posted December 14, 2019 Hi, Stacy At least for a Comtek I would wire it: TRS 3.5mm plug: Tip = XLR Pin-2 Ring = XLR Pin-3 Sleeve = XLR Pin-1 (In the XLR, ground Pin-1 to PIn-3) TS 3.5mm plug: Tip = XLR Pin-2 Sleeve = XLR Pin-1 & Pin-3) On the Comteks, Tip and Ring are the same mono signal but out of phase to each other. By grounding the ring you diminish the chance of out of phase cross-talk. On the camera side, whether pin-3 has to be grounded depends upon the input topography, however, grounding it should work whatever the input design. According to the R1A manual: "Mono Plug/Stereo Plug Usage A Mono plug or a Stereo plug can be used with the IFBR1a headphone jack directly. When a Mono plug is in- serted, a special circuit senses the “ring” to “sleeve” short and automatically switches off the ring to prevent excess battery drain. To reset, switch power OFF then back ON. " So the above wiring should work fine there, too. Quote Link to comment Share on other sites More sharing options...
stacysound Posted December 15, 2019 Author Report Share Posted December 15, 2019 Thanks John. The thread on the Comteks and having the Ring out of phase scared me. Cheers. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.