RG214U is available for $2/foot over at the RF Connection. I really like those folks. So, judging by their web site (therfc.com), it's a stock item. Not exactly cheap, but how many feet do you need for a reharness project...
--STeve Andre' wb8wsf en82 On Monday 10 July 2006 11:35, va7aa wrote: > I agree with everything that is said about RG214... but the trick is to get > some at a decent price... if you can get it at all. What jobber is gonna > sell a guy 10 or 15' of RG214u cable that is hard to get in the first place > ....special for his duplexer reharness project. You would have to get it > from a mail order house at a small quantity premium, if they will sell a > small lot at all. Does anyone on here have some to sell? > > I suggested brand new shiny RG8u because Sinclair are not idiots and have > been using that stuff for years in their product$. You and I will probably > be 6' under pushing up dasies, tweaken duplexers and filters in St. Peters > presence before the next batch in your rehaness job starts to go skunky.... > then theres repeater hell... heh heh > > VA7AA > ----- Original Message ----- > From: Jeff DePolo > To: Repeater-Builder@yahoogroups.com > Sent: Sunday, July 09, 2006 8:06 PM > Subject: RE: [Repeater-Builder] RG-213 versus RG-214 in a Sinclair > Duplexer > > > Every technical source I have indicates that the shield coverage on > > RG-214 > > > is no better than RG-213 at 97% which doesn't make a lot of sense > > physically > > > unless the shield weaves are different for the two cables. > > The M17 spec for RG-214's shield is 95.7% for the inner braid and 98.0% > for the outer. Here's the complete spec: > > Outer conductor: Double braid of AWG no. 34 silver-coated copper wire. > > Diameter: .360 inch maximum. > > Inner braid > ------------ > Coverage : 95.7% nominal > Carriers : 24 > Ends : 6 > Picks/inch : 16.6 +/- 10% > > Outer braid > ----------- > Coverage : 98.0% nominal > Carriers : 24 > Ends : 7 > Picks/inch : 15.4 +/- 10% > > When overlaid, the total shield coverage would be 99.914% if my math is > right. > > The silver plating is what makes RG-214 advantageous over RG-213 in a > duplex environment moreso than just the difference in braid coverage with > respect to shielding effectiveness. Movement of the braid strands against > each other doesn't make nearly as much noise with the silver plated strands > of RG-214 as compared to bare copper RG-213. And as the cable ages and the > braid strands tarnish (oxidize), the difference becomes progressively > greater as silver oxide is a very good conductor unlike cupric oxide (or is > it cuprous, I forget, cupric oxide is black-ish and cuprous is red-ish > IIRC). > > Of course, the additional shielding effectiveness of RG-214 is also a > good thing in terms of maintaining isolation in a duplexer harness or > between cables running adjacent to each other. > > Phelps-Dodge used RG-8 and RG-213 in many duplexer interconnects (PD696 > and PD526 come to mind), but later changed to RG-214. I've replaced the > cables on a number of these older duplexers picked up surplus and at > hamfests with RG-214, not wanting to even take the chance on the old 20+ > year old RG-8. > > I have two VHF Wacom duplexers not presently in use. One says "Modified > RG-214" on the coax, the other just says "RG-8". I presume the former is > just double-copper-shielded RG-8. If I were to put either of them into > service I'd change the harness without even giving it a second thought... > > --- Jeff > > > > > > > --------------------------------------------------------------------------- >--- > > > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.394 / Virus Database: 268.9.10/383 - Release Date: > 07/07/2006 Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/