- 1. [TowerTalk] Coax Line Loss (score: 1)
- Author: k6tfz@aol.com
- Date: Sat, 12 Apr 2008 16:22:14 -0400
- I have 150 feet of 15 year-old Rg-214 still up. I measured the power in at 50W and the power out (at the other end) at 36.6W using a dummy load terminator of 50 ohms. As it still good or should I cha
- /archives//html/Towertalk/2008-04/msg00242.html (6,745 bytes)
- 2. Re: [TowerTalk] Coax Line Loss (score: 1)
- Author: "Gedas" <w8bya@mchsi.com>
- Date: Sat, 12 Apr 2008 17:11:21 -0400
- 1.36 dB loss according to my windoze calculator. Only you can determine if that is good enough for your needs or not. Gedas, W8BYA http://gedas.cc http://www.w8bya.com _______________________________
- /archives//html/Towertalk/2008-04/msg00244.html (8,158 bytes)
- 3. Re: [TowerTalk] Coax Line Loss (score: 1)
- Author: Jim Lux <jimlux@earthlink.net>
- Date: Sat, 12 Apr 2008 14:50:42 -0700
- What frequency? For RG-213 (which is quite similar, 214 just has a double shield)... at14 Mhz, 150 ft has about 1.1dB of loss, so you'd get 38.7W at the load with 50W in.. That's pretty close to what
- /archives//html/Towertalk/2008-04/msg00247.html (7,430 bytes)
- 4. Re: [TowerTalk] Coax Line Loss (score: 1)
- Author: "Jim Brown" <jim@audiosystemsgroup.com>
- Date: Sat, 12 Apr 2008 15:15:07 -0700
- Yes, the loss you measured is 1.36 dB. ARRL's TLW calculator for Belden 8267 (RG213) predicts a loss of 1.17dB at 14 MHz, and 1.71dB at 28 MHz. The difference at 14 MHz is 0.2 dB, but is likely to be
- /archives//html/Towertalk/2008-04/msg00248.html (7,748 bytes)
- 5. Re: [TowerTalk] Coax Line Loss (score: 1)
- Author: "Roger (K8RI)" <K8RI-on-TowerTalk@tm.net>
- Date: Sun, 13 Apr 2008 00:11:06 -0400
- db loss = 10log(50/36.6)=1.3549/150ft=*100=0.90 db/100 ft which ain't bad if you did the test on 14 MHz. It's far too good for 30 Mhz. 73 Roger (K8RI) _______________________________________________
- /archives//html/Towertalk/2008-04/msg00255.html (8,225 bytes)
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