I received several inquiries about my old Coaxial Cable Loss Tables.
Yes, I've updated the tables several times. My most recent update incorporates
more accurate computations from the VK1OD on-line calculator.
http://vk1od.net/tl/tllc.php
I also added the popular LMR-400 and LMR-600 cables to the tables.
Perhaps the most important aspect of the tables is the minimum cable length
required to obtain one dB of benefit from low loss cables. I chose LDF4-50A
and LDF5-50A to make the comparisons because they are high performance cables
always available for reasonable prices on eBay, QTH.COM and many hamfests.
73
Frank
W3LPL
CABLE ATTENUATION (dB per 100 feet)
1.8 3.6 7.1 14.2 21.2 28.4 50.1 144 440 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
LMR-600 .10 .15 .20 .29 .35 .41 .55 .94 1.7 3.1
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
LMR-400 .16 .23 .32 .46 .56 .65 .87 1.5 2.7 4.7
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 13.2
CABLE ATTENUATION (feet per dB)
1.8 3.6 7.1 14.2 21.2 28.4 50.1 144 440 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 2108 1490 1064 750 611 526 393 227 125 69
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 1145 809 579 409 333 287 215 125 70 39
RG-17 1000 769 556 370 294 250 200 77 40 20
LMR-600 973 688 492 347 283 244 182 106 59 33
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
LMR-400 613 436 310 219 179 154 115 67 38 21
RG-213 397 279 197 137 111 95 69 38 19 9
RG-8X 257 181 128 90 74 63 47 27 14 8
FEET REQUIRED FOR 1 DB ADVANTAGE LDF5-50A VS:
1.8 3.6 7.1 14.2 21.2 28.4 50.1 144 440 1296
LDF4-50A 2500 1430 1250 910 715 625 475 279 158 90
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 935 590 455 320 280 220 150 85 53 29
FEET REQUIRED FOR 1 DB ADVANTAGE LDF4-50A VS:
1.8 3.6 7.1 14.2 21.2 28.4 50.1 144 440 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-213 618 434 306 212 171 146 106 58 29 14
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