[LCC] Coax loss tables from W3PLP
Scott Dickson
w5wz at w5wz.com
Thu Feb 18 08:00:52 EST 2010
Friends,
I stumbled across these a few days ago. Good reference material.
--Scott, W5WZ
From: Frank Donovan W3LPL
Subject: CONTESTER's coax cable attenuation charts
I developed and have been using the following charts for some years.
The CONTESTERs I've given copies to have found them most useful as
well. The first table is the common attenuation per 100 ft chart, but
with specific values for each ham band.
The second table is in cable feet per dB, which can be very handy for
tradeoff analysis (e.g. do I really need to use Andrew LDF5 for my 1000
foot run to my Beverages or is RG-8X good enuf?).
The third table shows the results of just such a tradeoff analysis, each
entry in the table represents the cable length in feet before Andrew
LDF5 offers a 1 dB advantage vs the various cables listed
The last table is identical to the third table, except these trades are
for Andrew LDF4.
Enjoy...
73!
Frank
W3LPL
CABLE ATTENUATION (dB per 100 ft)
1.8 3.5 7.0 14.0 21.0 28.0 50.0 144 440 1296
LDF7-50A .03 .04 .06 .08 .10 .12 .16 .27 0.5 0.9
FHJ-7 .03 .05 .07 .10 .12 .15 .20 .37 0.8 1.7
LDF5-50A .04 .06 .09 .14 .17 .19 .26 .45 0.8 1.5
FXA78-50J .06 .08 .13 .17 .23 .27 .39 .77 1.4 2.8
3/4" CATV .06 .08 .13 .17 .23 .26 .38 .62 1.7 3.0
LDF4-50A .09 .13 .17 .25 .31 .36 .48 .84 1.4 2.5
RG-17 .10 .13 .18 .27 .34 .40 .50 1.3 2.5 5.0
SLA12-50J .11 .15 .20 .28 .35 .42 .56 1.0 1.9 3.0
FXA12-50J .12 .16 .22 .33 .40 .47 .65 1.2 2.1 4.0
FXA38-50J .16 .23 .31 .45 .53 .64 .85 1.5 2.7 4.9
9913 .16 .23 .31 .45 .53 .64 .92 1.6 2.7 5.0
RG-213 .25 .37 .55 .75 1.0 1.2 1.6 2.8 5.1 10.0
RG-8X .49 .68 1.0 1.4 1.7 1.9 2.5 4.5 8.4
CABLE ATTENUATION (Ft per dB)
1.8 3.5 7.0 14.0 21.0 28.0 50.0 144 440 1296
LDF7-50A 3333 2500 1666 1250 1000 833 625 370 200 110
FHJ-7 2775 2080 1390 1040 833 667 520 310 165 92
LDF5-50A 2500 1666 1111 714 588 526 385 222 125 67
FXA78-50J 1666 1250 769 588 435 370 256 130 71 36
3/4" CATV 1666 1250 769 588 435 385 275 161 59 33
LDF4-50A 1111 769 588 400 323 266 208 119 71 40
RG-17 1000 769 556 370 294 250 200 77 40 20
SLA12-50J 909 667 500 355 285 235 175 100 53 34
FXA12-50J 834 625 455 300 250 210 150 83 48 25
FXA38-50J 625 435 320 220 190 155 115 67 37 20
9913 625 435 320 220 190 155 110 62 37 20
RG-213 400 270 180 130 100 83 62 36 20 10
RG-8X 204 147 100 71 59 53 40 22 12
FEET REQUIRED FOR 1 DB ADVANTAGE LDF5-50A VS:
1.8 3.5 7.0 14.0 21.0 28.0 50.0 144 440 1296
LDF4-50A 2000 1430 1250 910 715 625 435 250 165 100
RG-17 1666 1430 1110 770 560 475 420 120 60 30
FXA12-50J 1250 1000 770 525 435 355 255 120 75 40
9913 835 590 455 320 280 220 150 85 53 29
FEET REQUIRED FOR 1 DB ADVANTAGE LDF4-50A VS:
1.8 3.5 7.0 14.0 21.0 28.0 50.0 144 440 1296
RG-17 - - - - - - - 220 90 40
FXA12-50J - - 2000 1250 1100 835 625 250 145 65
9913 1430 1000 715 500 455 345 235 135 75 40
RG-213 910 600 285 200 150 120 85 45 20 12
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.louisianacontestclub.org/pipermail/lcc_louisianacontestclub.org/attachments/20100218/51c6d65f/attachment-0001.html>
More information about the LCC
mailing list