Sencore 39G219 test lead question - Page 1
Forum section: electronics / testgear

author: dorkshoei
author_rank: Frequent Contributor
timestamp: November 15, 2021, 04:44:32 am
content: Can anyone with a Sencore 39G219 test lead tell me what the cable markings are on the positive/red lead cable? (red arrow in attached picture).The cable is marked on mine but they have worn to the point where I cannot read them.,It is some kind of thin coax (shielded - the shield is connected to the shield on the main RG62).

author: commongrounder
author_rank: Frequent Contributor
timestamp: November 15, 2021, 01:32:12 pm
content: I checked my copy of the 39G219 lead, and there are no markings at all on the coax segment going to the red ez-clip. I would think it’s a bit of the luck of the draw on such a short bit of cable, since the raw stock they pulled off of to make the lead is probably only labeled every six inches or so. The goal is to keep the overall capacity of the cable low enough to be within the auto-cal range of the analyzer (assuming an LC102). For that short section, I think you could get away with a replacement that fits the physical description of the original. It does need to be able to withstand 1000 volts from the leakage test function, though.

author: dorkshoei
author_rank: Frequent Contributor
timestamp: November 15, 2021, 02:58:31 pm
content: Having a hard time finding coax which has a 0.1" OD. I already measured it yesterday before posting and drew a blank.The black lead is just standard test wire, again, 1000V capable.

author: commongrounder
author_rank: Frequent Contributor
timestamp: November 15, 2021, 04:54:23 pm
content: Yeah. That is pretty dinky stuff. Sencore was probably big enough to have Belden, or some other US business, do custom runs of cable in “Sencore Gray”. I assume your cable is suffering fatigue failure. I’ve shortened my lead set a couple of times in the years I have owned them. Had no trouble with auto-zeroing.

author: mr.fabe
author_rank: Regular Contributor
timestamp: November 16, 2021, 02:19:48 pm
content: Here's what is stamped on my 39G219 cable leads. I have also built my own test leads with RG62/U and 16GA stranded wire that tested ok with an LC53,LC75, LC101, and LC103. I think the original cable lead wire Sencore used for the positive lead was a RG-174/U but I'm not 100% sure.

author: commongrounder
author_rank: Frequent Contributor
timestamp: November 16, 2021, 02:52:16 pm
content: I think that is a Wirenetics part number.

author: dorkshoei
author_rank: Frequent Contributor
timestamp: November 16, 2021, 04:09:11 pm
content: Quote from: commongrounder on November 16, 2021, 02:52:16 pmWhat is the number? I'm not making it out.RG-174/U is 50 ohm. Possible I guess.

author: commongrounder
author_rank: Frequent Contributor
timestamp: November 16, 2021, 08:03:16 pm
content: I read 5-24340. Could be an “S” instead of a “5”. That’s similar to some Wirenetics part numbers of cable I have laying around here.

author: dorkshoei
author_rank: Frequent Contributor
timestamp: November 16, 2021, 08:49:54 pm
content: Quote from: commongrounder on November 16, 2021, 08:03:16 pmI think it's an E. E-24340.https://www.ebay.com/itm/192573733976But RG59 is a much larger OD.

author: commongrounder
author_rank: Frequent Contributor
timestamp: November 16, 2021, 11:53:59 pm
content: Hmmmm. Yeah. That doesn’t make sense. Don’t know what else to try. Sencore, the test equipment company, has been gone too long to be any help.

author: dorkshoei
author_rank: Frequent Contributor
timestamp: November 16, 2021, 11:55:12 pm
content: Quote from: commongrounder on November 16, 2021, 11:53:59 pmNah, you're good. Thanks for the help everyone. Useful.