Clay and Max Have you considered using Heat Shrink tubing to protect the Antenna. The heat shrink should withstand the BP and protect the antenna. my 0.02 George Shaiffer > From: [email protected] > To: [email protected] > Date: Mon, 1 Sep 2014 15:13:03 -0700 > Subject: Re: [altusmetrum] Selecting an antenna > > Clay, > > Sounds like a good idea to me. I think if the antenna is mounted close to > the airframe, rather than centered on a bulkhead; there would be room for > parachutes and deployment charges. I would want a very rugged antenna; that > would withstand the BP detonation. One could run wires to a charge ast the > opposite end of the section with a parachute. That way; the parachute and > Nomex blanket/bag would protect the antenna from the BP. > > Max > > -----Original Message----- > From: altusmetrum [mailto:[email protected]] On Behalf Of > Clay and Carly Dunsworth > Sent: August 31, 2014 17:47 > To: Altus Metrum > Subject: Re: [altusmetrum] Selecting an antenna > > going to use something like this on the bulkhead. You can get them in almost > any connector. So I am not really set on any particular connector. > it would be patch cable from the TM to the bulkhead. (I think I prefer > sma) > > http://www.datapro.net/products/sma-panel-mounting-coupler.html > > > yes the edge mount PCB sma, does work on the TM, at one time you could order > them with that option. I really think this will put me back in the game. > > Wasn't sure if that short "wide band" duck would be worthless at altitude for > packets. I think I can make any of those work. My longer... or oops my > wifes, 4" darkstar, I fly a 8000ns (42")case in, the 14" whip would go nicely > in the 1/4" bettween the motor and airframe!... but md rockets you cant do > that. > > The other option would be stainless braided cable, like waltson trackers use. > I cant seem to "make my own" antenna... I think I always get the length off > just enough that the signal doesn’t go very far. like no packets on the > launch pad. I am able to verify ignitor continuity and battery during prep > though and is nice. the stainless seems to stay strait fairly decently while > being bendable... > I just use the becon rdf method. 20k abouts...nice tone.... > > -----Original Message----- > From: Kurt > Sent: Sunday, August 31, 2014 7:13 PM > To: Altus Metrum > Subject: Re: [altusmetrum] Selecting an antenna > > Clay, > > All those antennas have a different connector on them. When you make your > final choice, were you going to pick a bulkhead connector pigtail? > > Something like this? > http://www.ebay.com/itm/cable-SMA-male-plug-to-SMA-female-jack-bulkhead-straight-RG174-6-pigtail-FPV-/281108847574?pt=US_Radio_Comm_Coaxial_Cables_Connectors&hash=item4173649bd6 > > Nix the antennas from the baofeng radios as that would take a funky bulkhead > connector. > The PL256 is pretty big.. > > You could consider an RP-SMA PC board connector but you'd have to order your > bulkhead connector > accordingly: > http://www.ebay.com/itm/PCB-PC-Board-Panel-Mount-RP-SMA-Female-Straight-Solder-Receptacle-Connector-New-/261127436055?pt=LH_DefaultDomain_0&hash=item3ccc687717 > > As opposed to the female SMA the Beeline trackers use: > http://www.ebay.com/itm/5-Pcs-SMA-Female-Jack-Edge-Mount-PC-Board-PCB-Receptacle-Adapters-Connectors-New-/170703945976?pt=LH_DefaultDomain_0&hash=item27bebf80f8 > > I don't know what the edge of the PC board looks like on the telemetrum. > Can one solder an SMA socket like the ones above to the board? If so, would > make cabling a little easier. > > I have one of those HH-S518 on an aft ebay bulkhead on a 3" Wildman I > stretched the length and also used a 10" tube for the ebay. I painted the > rocket metallic so I didn't get any packets at 10k' altitude. > I routed a connector to an SMA bulkhead socket so like you, the antenna would > be exposed at apogee. > I haven't done a range test yet but I think it will be fine. The long > antennas will likely get dorked when the rocket lands plus you gotta have a > long sustainer to house them. > > WHOA........ I just found this one: > http://www.ebay.com/itm/Golden-Omni-TPEE-10W-UHF400-470MHz-Soft-Handheld-Radio-Antenna-SMA-M-Male-/181384375740?pt=US_Radio_Comm_Antennas&hash=item2a3b59edbc > > I'm going to order a couple. Looks promising even if the aft end hits, the > wire spring will likely take it. Only thing is the all important range check. > > Kurt KC9LDH > > -------------------------------------------- > On Sun, 8/31/14, Clay and Carly Dunsworth <[email protected]> wrote: > > Subject: [altusmetrum] Selecting an antenna > To: "Altus Metrum" <[email protected]> > Date: Sunday, August 31, 2014, 12:37 PM > > My last flight pulled my whip antenna from my telemetrum, so I am going to > put an sma connector on it. (it’s a – patchwork fix I am rather good at by > now.) No use throwing away a 300.00 board cause of missing pcb trace... > > I have decided to mount an antenna on the aft bulkhead so it is exposed at > the apogee. I came across this and wondered if anyone has used one of these? > http://www.ebay.com/itm/Dual-Band-VHF-UHF-SMA-M-145MHz-435MHz-Antenna-for-Radio-YAESU-VX-3R-VX-6R-VX-7R-/171297005651?pt=US_Radio_Comm_Antennas&hash=item27e218e053 > > The other option are these whips. they are sma or pl259(which might be > better...?_ > > 14.4” > http://www.ebay.com/itm/High-Gain-14-4-SMA-Female-Dual-Band-Antenna-for-BAOFENG-UV-5R-UV-5RA-UV-5RC/400638072298?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D23490%26meid%3D7a0bc47888e3483f8b4e54b3899e943f%26pid%3D100005%26prg%3D10073%26rk%3D2%26rkt%3D6%26sd%3D131180602475&rt=nc > > 7.56” > pl259 > http://www.ebay.com/itm/10W-uhf-400-470mhz-black-short-car-amateur-radio-antenna-pl259-male-connector-/321260637411?_trksid=p2054897.l5665 > sma > http://www.ebay.com/itm/SMA-F-Dual-Band-UHF-Antenna-144-435MHz-for-BAOFENG-BF-666S-BF-777S-BF-888S-/131162111054?pt=US_Radio_Comm_Antennas&hash=item1e89defc4e > > cheap enough to buy all 3, but the stubby ducky would be good in my minimum > diameter rockets that have almost zero room.. wondering if anyone has used > them with any success and can advise on how they compare. > > > - > _______________________________________________ > altusmetrum mailing list > [email protected] > http://lists.gag.com/mailman/listinfo/altusmetrum > > _______________________________________________ > altusmetrum mailing list > [email protected] > http://lists.gag.com/mailman/listinfo/altusmetrum > > _______________________________________________ > altusmetrum mailing list > [email protected] > http://lists.gag.com/mailman/listinfo/altusmetrum
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