" Seems to me that someone once mentioned that you must use crimp connectors on aircraft...??? ....not sure if that is true...."
I have mentioned that with regard to regular wire, not coaxial cable. The logic behind that is that when a wire is tinned and the solder wicks up past the connector, you now have a solid conductor as opposed to a stranded one which is far more vulnerable to work fatigue, especially with the vibration common in aircraft. To avoid the problem, all connectors must be of the crimp type and the wires may not be tinned before crimping or soldered afterward. In school I was told, though I have never been able to confirm it, that a properly crimped connection produces enough pressure and heat that the wire is actually bonded to the connector at the point of crimp when correctly done. Perhaps that is so with multi thousand dollar pneumatic crimpers but it doesn't seem to be the case with my AMP specials. I never saw a soldered RF connector while in school but do not remember any comments about them being prohibited, so I don't know for sure on those. Tom DGN --- In [email protected], "John J. Riddell" <ve3...@...> wrote: > > Chuck, I work for a National Telecom company here in Canada > and we crimp everything used on DS-3 (BNC) and above. For the center pin > you need a 12 point circular crimper and for the sleeve you need a good > quality hex crimper such as Tyco etc. These two items can run you several > hundred dollars each. > The SMB crimper that we use costs around $1100.00 > > I've probably done a few thousand of them and never had a failure. > So the trick is to have good tools and know the proper way of installing the > connector. > > Seems to me that someone once mentioned that you must use crimp connectors on > aircraft...??? > ....not sure if that is true.... > > John VE3AMZ > ----- Original Message ----- > From: Chuck Kelsey > To: [email protected] > Sent: Monday, April 12, 2010 11:49 AM > Subject: Re: [Repeater-Builder] crimping assistance please > > > > > > To reduce PIM, the center conductor should be soldered. Whether there is a > practical (measurable) difference would depend on how well the crimp was > done, vs solder. > > From an Amphenol paper: > "Cable Attachment: Mechanical stability of the cable/connector junction is > of utmost importance. Small movements caused by flexing can be translated > into significant PIM. Center conductors should be soldered, not crimped." > > Chuck > WB2EDV > > > > ----- Original Message ----- > From: allan crites > To: [email protected] > Sent: Monday, April 12, 2010 11:26 AM > Subject: RE: [Repeater-Builder] crimping assistance please > > > Jeff > Doesn't soldering of the center contact to the center conductor > affect the connector PIM adversely vs not soldering? > AC > > > > ---------------------------------------------------------------------------- > > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 9.0.801 / Virus Database: 271.1.1/2806 - Release Date: 04/12/10 > 02:32:00 >
