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Coax data
A better picture
CB channel grid
License-free QRG:s
NOAA WX channels
Scanning tips
Various PLL circuits
Coax connectors
dBm/Pwr/RMS/VPP table





Last modified 2010-01-30
In this area, you will find info on frequencies, hints, tips and other interesting stuff. As this has a low priority for
the moment, it will grow very slowly. It may also change in appearance as it grows.

Under swedish law, proliferation of unofficial frequencies is forbidden. Therefore, only public frequencies available
in the "open domain" will be published here.

robtex

Coax data

Loss is in dB/100 m. For example, 100 meters of H-2000 Flex will attenuate a 144 MHz signal with 4.8 dB.
Diameter and bending radius is given in millimeters.

TypeOuter
diam.
Bending
radius
Imp.Vel.Kg/100mpF/m101428305010014420030040043545050080090010001296150018002300240030005000
Aircell 55.025500.823.6823.0




11.8


21.1



32.8



53.2

Aircell 77.325500.837.274
3.43.7
4.86.67.9


14.0




26.1


38.0

Aircom Plus10.855500.8515.0840.9



3.34.5


8.2




14.5


23.0

Andrew C2FP10.1625.4500.8513.078.4


2.53.2
4.95.8


8.8

12.7

16.718.4
21.525
Andrew LDF2-50 3/8"11.1741500.8812.0751.05

1.842.43.424.154.96.067.05
7.517.9510.210.911.5513.114.441618.4
21.428.8
Cellflex LCF 12-5016.27050?22?0.67

1.17
2.16
3.13.8

4.7

6.8

99.911.4
13.2
Cellflex LCF 58-5021.49050?37?0.5

0.88
1.64
2.352.91

3.6

5.3

77.89
10.5
Cellflex LCF 78-502812050?53?0.35

0.62
1.15
1.662.07

2.58

3.8

5.15.76.6
7.7
Cellflex LCF 114-5039.420050?105?0.28

0.49
0.93
1.351.7

2.14

3.2

4.44.95.7
6.8
Cellflex LCF 158-505130050?153?0.21

0.37
0.7
1.031.3

1.65

2.51

3.53.94.6
5.2
Cellflex SCF 14-507.82550?7?1.81

3.2
5.8
8.310.3

12.7

18.4

24.326.931
36
Cellflex SCF 38-5010.22550?12?1.31

2.29
4.2
67.5

9.2

13.3

17.619.422.3
25.9
Cellflex SCF 12-5013.73250?21?1.03

1.8
3.3
4.85.9

7.3

10.6

1415.517.8
20.7
CFD-40010.325.4500.851078.5


2.32.9
4.8



8.8

12.8

16.7

21.9
34
Ecoflex 1010.240500.8613.177





4.8


8.9




16.5


23.1

H-439.8100750.859.1521.2


2.53.7



8.0




14.3


23.7

H-1009.8
500.84
80




4.5
















H-155PE5.435500.813.8823.0


6.59.3

16.319.0
20.3

29.830.9

42.5



H-5009.875500.8113.5821.3


2.94.1



9.3




16.8


24.5

H-100010.375500.8314.080
1.42.0
2.73.94.8


8.5




15.7


23.0

H-2000 Flex10.350500.8314.080
1.42.0
2.73.94.8


8.5

11.912.8
15.7

21.823.0
34.8
HDF-2005?50???


5.8

13



22.8




42.3

55.4

HDF-40010.3?50???


2.2

5



8.9




16.8

22

TypeOuter
diam.
Bending
radius
Imp.Vel.Kg/100mpF/m101428305010014420030040043545050080090010001296150018002300240030005000
LMR-40010.325.4500.851078.4


2.22.9
4.96


8.9

12.8

16.818.6
22
33
LMR-6001538.1500.872076.6


1.41.8
3.13.8


5.6

8.2

10.912.1
14.3
21.5
RG-1110.350750.6613.967



4.66.9



18.0




30.0





RG-58 M17/28 (1084)4.9525500.663.61014.5


9.915.2
21.6



34.3

53.7




107.5
RG-58/AU4.9525.4500.66
97.85.0


1218
27
41



6975






RG-58/CU5.030500.664.0101
6.28.0
11.015.617.8


33.0




65.0


100.0

RG-58/LL4.9525.4500.66
97.8




12.2


24.6




42.7

59.1



RG-58/U4.9525.4500.66
97.83.9


8.913.1
19.0
27.9



51.367.3






RG-596.1530750.665.767




12.0



25.0




33.6





RG-174U2.815500.66
101




30.9
















RG-1882.76500.7
96



15.827.4
36.1
54.9



77.587.9






RG-213U10.3110500.6615.51012.2
3.1
4.46.27.9


15.0




27.5


47.0

RG-214U10.8?50??1002

3.7
7
10.2
15

1723
28






RG-217U13.8?500.66?971.4


3.34.6
7
10.3




19.3




43
RG-2235.425500.666.0101
6.17.9
11.015.017.6















RG-316/U2.530500.71.594




26.7
37.946.657.4

60.576.981.786.3
106.4117132.9135.9

Suhner S 12272-0415150500.8219.1821.0


2.03.03.54.05.06.06.66.87.09.01011

15
1922
Suhner Sucofeed 1/2"1670500.882576




2.32.7


4.8




7.8


1214
Suhner Sucofeed 7/8"27.8120500.8759.876.5




1.31.5


2.8




4.8


6.98.0
Suhner Sucofeed 1-1/4"39.5200500.879478




0.851.1


1.9




3.5


5.05.8
Suhner Sucofeed 1-5/8"50300500.8714577.5




0.70.8


1.6




3.0


4.35.1



How to take a better picture

First a disclaimer: I am NOT a professional photographer, and I do not claim to be a hot-shot amateur ditto either, but....

...after seeing hundreds of rig-shots taken by various people, I must say that a brief "how-to" is apropriate here. Quite a lot of pictures are taken point blank, with a flash! Hmm. Imagine that radio's reflective, shiny front panel with a flash, in a straight angle right into it. I'm sorry, but this does NOT make a good picture. If a flash is arranged in this way, you will only end up with a bright over-exposed spot in the middle.

When I want to take a picture, I arrange the radio on a dark surface, facing a window during a fairly sunny day, thus NOT using a flash at all. With this arrangement, I get a smooth, even illumination of the radio. Then I power it up to light up any display, LED or lamp. The picture is then taken from a slightly elevated angle to give the picture some degree of perspective. It certainly helps if you use a manual camera where you are in control of exposure timing and aperture settings. Use a small aperture and longer exposure. Use a stand to avoid fuzzy pictures. If your camera has a zoom lens, it's best to back away from the target and zoom it instead to minimize picture distortion.


CB channel grid

NB! Most of the columns in this grid are illegal in just about every country in the world (with maybe one or two exceptions).
Column D is legal, widespread and also license free in many countries. The UK allows both column D and the unique CB27/81.
The D column A or "Alpha" channels are normally NOT allowed for communication as they are reserved for R/C models and baby monitors.

ChannelABCD
CEPT/EU/US
EFGHIJUK
CB27/81
125.61526.06526.51526.96527.41527.86528.31528.76529.21529.66527.60125
225.62526.07526.52526.97527.42527.87528.32528.77529.22529.67527.61125
325.63526.08526.53526.98527.43527.88528.33528.78529.23529.68527.62125
3 A25.64526.09526.54526.99527.44527.89528.34528.79529.24529.695-
425.65526.10526.55527.00527.45527.90528.35528.80529.25529.70527.63125
525.66526.11526.56527.01527.46527.91528.36528.81529.26529.71527.64125
625.67526.12526.57527.02527.47527.92528.37528.82529.27529.72527.65125
725.68526.13526.58527.03527.48527.93528.38528.83529.28529.73527.66125
7 A25.69526.14526.59527.04527.49527.94528.39528.84529.29529.745-
825.70526.15526.60527.05527.50527.95528.40528.85529.30529.75527.67125
925.71526.16526.61527.06527.51527.96528.41528.86529.31529.76527.68125
1025.72526.17526.62527.07527.52527.97528.42528.87529.32529.77527.69125
1125.73526.18526.63527.08527.53527.98528.43528.88529.33529.78527.70125
11 A25.74526.19526.64526.09527.54527.99528.44528.89529.34529.795-
1225.75526.20526.65527.10527.55528.00528.45528.90529.35529.80527.71125
1325.76526.21526.66527.11527.56528.01528.46528.91529.36529.81527.72125
1425.77526.22526.67527.12527.57528.02528.47528.92529.37529.82527.73125
1525.78526.23526.68527.13527.58528.03528.48528.93529.38529.83527.74125
15 A25.79526.24526.69527.14527.59528.04528.49528.94529.39529.845-
1625.80526.25526.70527.15527.60528.05528.50528.95529.40529.85527.75125
1725.81526.26526.71527.16527.61528.06528.51528.96529.41529.86527.76125
1825.82526.27526.72527.17527.62528.07528.52528.97529.42529.87527.77125
1925.83526.28526.73527.18527.63528.08528.53528.98529.43529.88527.78125
19 A25.84526.29526.74527.19527.64528.09528.54528.99529.44529.895-
2025.85526.30526.75527.20527.65528.10528.55529.00529.45529.90527.79125
2125.86526.31526.76527.21527.66528.11528.56529.01529.46529.91527.80125
2225.87526.32526.77527.22527.67528.12528.57529.02529.47529.92527.81125
2325.90526.35526.80527.25527.70528.15528.60529.05529.50529.95527.82125
2425.88526.33526.78527.23527.68528.13528.58529.03529.48529.93527.83125
2525.89526.34526.79527.24527.69528.14528.59529.04529.49529.94527.84125
2625.91526.36526.81527.26527.71528.16528.61529.06529.51529.96527.85125
2725.92526.37526.82527.27527.72528.17528.62529.07529.52529.97527.86125
2825.93526.38526.83527.28527.73528.18528.63529.08529.53529.98527.87125
2925.94526.39526.84527.29527.74528.19528.64529.09529.54529.99527.88125
3025.95526.40526.85527.30527.75528.20528.65529.10529.55530.00527.89125
3125.96526.41526.86527.31527.76528.21528.66529.11529.56530.01527.90125
3225.97526.42526.87527.32527.77528.22528.67529.12529.57530.02527.91125
3325.98526.43526.88527.33527.78528.23528.68529.13529.58530.03527.92125
3425.99526.44526.89527.34527.79528.24528.69529.14529.59530.04527.93125
3525.00526.45526.90527.35527.80528.25528.70529.15529.60530.05527.94125
3626.01526.46526.91527.36527.81528.26528.71529.16529.61530.06527.95125
3726.02526.47526.92527.37527.82528.27528.72529.17529.62530.07527.96125
3826.03526.48526.93527.38527.83528.28528.73529.18529.63530.08527.97125
3926.04526.49526.94527.39527.84528.29528.74529.19529.64530.09527.98125
4026.05526.50526.95527.40527.85528.30528.75529.20529.65530.10527.99125

International SSB calling frequency:27.555
International SSTV frequency:27.700

License-free QRG:s

FRS is for use in the US and Canada.
LPD is for european use, sadly in the middle of our 70 cm ham band! Maximum 10 mW ERP and built-in, non-removable antenna. 69 channels between 433.075-434.775 MHz
LPD Japan or "Mini set". Max 10 mW ERP
MURS is for use in the US. Maximum 2 W ERP
PMR446 is for european use. Maximum 0.5 W ERP and built-in, non-removable antenna
PRS/UHF CB is for Malaysia (14 ch), Australia & New Zealand (40 ch) use. Located in the 477 MHz segment. Max 5 W
SRBR/KDR for Sweden. Maximum 1 W ERP and built-in, non-removable antenna
934 UK was for use in the UK. A maximum of 8 watts output and 8 element beam. Withdrawn 1998-12-31.

FRS = Family Radio Service, LPD = Low Power Device, MURS = Multi-Use Radio System, PMR = Personal Mobile Radio, SRBR = Short Range Bussiness Radio

934 UKQRG in MHz
1934.0125
2934.0625
3934.1125
4934.1625
5934.2125
6934.2625
7934.3125
8934.3625
9934.4125
10934.4625
11934.5125
12934.5625
13934.6125
14934.6625
15934.7125
16934.7625
17934.8125
18934.8625
19934.9125
20934.9625
LPD JapanQRG in MHz
1422.0500
2422.0625
3422.0750
4422.0875
5422.1000
6422.1125
7422.1250
8422.1375
9422.1500
10422.1625
11422.1750
H1422.2000
H2422.2125
H3422.2250
H4422.2375
H5422.2500
H6422.2625
H7422.2750
H8422.2875
H9422.3000
FRSQRG in MHz
1462.5625
2462.5875
3462.6125
4462.6375
5462.6625
6462.6875
7462.7125
8467.5625
9467.5875
10467.6125
11467.6375
12467.6625
13467.6875
14467.7125
MURSQRG in MHz
1151.820
2151.880
3151.940
4154.570
5154.600
SRBR/KDRQRG in MHz
1444.600
2444.650
3444.800
4444.825
5444.850
6444.975
PMR446QRG in MHz
1446.00625
2446.01875
3446.03125
4446.04375
5446.05625
6446.06875
7446.08125
8446.09375
All channels use NFM.
Check out
the related area.



NOAA WX-channels (USA)

Throughout the US, there are over 1000 transmitters utilized by
NOAA and the National Weather Radio (NWR). They transmit severe weather warnings (such as tornadoes and stuff) to specialized receivers. These are either stand-alone units or built-in for example into CB-radios. Of course, transmissions are also easily picked up on virtually any scanner. Locations, callsigns and more can be found at this URL. The frequencies are as follows:

ChannelQRG in MHz
1162.400
2162.425
3162.450
4162.475
5162.500
6162.525
7162.550
All channels use NFM.



Scanning tips

Now, this is a subject that could fill up many MB:s of text and pictures, but I will limit this section a little bit and write about some perhaps more uncommon stuff you can do.

I have had a blast snooping the airwaves with a setup consisting of:
  1. An Icom IC-R10 hand scanner
  2. A Watson "Super Searcher" (10-3000 MHz RF finder)
  3. A serial cable between the above
The Super Searcher is basically a portable, very sensitive frequency counter, connected to an antenna of your choice. It also has the possibility to "reaction tune" any Icom CI-V or AOR receiver/scanner to the locked frequency. Got the picture yet? Well this is going to be fun. Take this setup out on the road, preferrably to a main street with a lot of traffic, and BINGO! As soon as there is someone fairly close by, pressing the PTT on his/her transceiver, the Super Searcher locks onto the frequency, passes the frequency information to the Icom/AOR receiver and voila! With no effort at all, you can listen to, and start logging those presumably unknown frequencies.

I have also done some snooping from the car. By connecting the Super Searcher to an external antenna, the range of detection will be greater. If you drive around your town with this setup, you'll have frequencies and communications popping up as you pass the transmitters. The range of detection is of course depending on several factors: your antenna, the transmitting antenna, the frequency in question and of course the power output.

There are a few drawbacks too. Being a broadband device, the Super Searcher may be blocked when passing certain strong, wideband transmitters such as aviation radar sites, cellular dittos, broadcasting towers and multiple transmitter clusters. To test this, I hooked up the gear and went to Bromma Airport which is close to home, and parked within a 100 meters from the radar ball. This radar operates just above 1.3 GHz (1300 MHz). The Super Searcher could neither detect the Air-to-ground comm's antennas about 25 meters behind the car, nor my very own 2m/70cm/23cm HT with 300 mW output, 20 cm away. I had to move the HT as close as 8-10 cm from the Super Searcher in order for it to detect my transmission. Talk about blocking! This is however a relatively small problem that in practice won't matter that much. The extremist will buy and connect a megabuck preselector with 2 MHz bandwidth, thus selecting a small portion of the spectrum to be detected (you will miss a lot this way). A better approach would probably be a notch filter for 88-108 MHz and maybe a lowpass filter to block everything above, say 480 MHz.

The other drawback is impossible to remedy. The Super Searcher can not detect and pass the mode of transmission. You will have to set it manually on your radio. This is however a minute problem as most comm's except aviation is done with FM.

There are of course other manufacturers with similar devices offering "reaction tune" such as Optoelectronics, but this one won't cost you an arm and a leg. I had mine for only 1500:- SEK in Sweden. In UK the price is £99 (summer 2000).

The Watson Super Searcher comes with rechargable batteries, a wall charger and a telescopic antenna. It also has a bargraph to indicate relative signal strength. It's a fun tech-toy and a must-have for the scanner-hyena.

Of course, a full featured, megabuck spectrum analyzer will do the job under any circumstances (except reaction tune), no matter what the RF environment looks like, but the huge price for such a device is likely to deter most hobbyists (like me).


Various PLL circuits

A work in progress. See also the
components page

AN6040C5121CCI3001CCI3002ECG1198ECG1207ECG1233ECG1254
ECG1255HD42851HD42853KM5624LC7110LC7113LC7120LC7130
LC7131LC7132LC7135LC7136LC7137LC7185M58472PM58473P
M58476MB8719MB8733MB8734MC14568MC145104MC145106MC145107
MC145109MM48141MM55106MM55107MM55108NMM55116MM55126MM55104
MM55107MM55108MN6040MN6040AMSC42502PMSM5807MSM5907NDC40013
NIS7261ANIS7264BPLL01APLL02APLL03APLL08APLL0305APLL2001
PLL2002REC86345SM5104SM5107SM5109SM5118SM5123ASM5124A
SM5125BSM5126ASM5126BTC5080PTC9100TC9102PTC9103PTC9105
TC9106TC9109PTC9119µPD858CµPD861µPD2810CµPD2812CµPD2814
µPD2816µPD2824µPD2833C





Coax connectors - Assembly guides

Another work in progress...

UG-21 STG A professional N-type, male connector
Suitable for RG-213, Aircom Plus, Ecoflex 10,
H-1000 and H-2000 Flex

UHF Spezial A professional PL-259/UHF-type, male connector
Suitable for RG-213, Aircom Plus, Ecoflex 10,
H-1000 and H-2000 Flex

Deltaohm 1/2" A professional coax connector. (Page 1)
Suitable for 1/2" corrugated coax cable


Deltaohm 1/2" A professional coax connector. (Page 2)
Suitable for 1/2" corrugated coax cable


Teracom 7/8 A professional coax connector. (d0 version)
Suitable for 7/8" corrugated coax cable


Teracom 7/8 A professional coax connector. (e0 version)
Suitable for 7/8" corrugated coax cable



dBm/Pwr/V RMS/V P-P equivalent table (50 ohms)

dBmPowerV RMSV P-P
01 mW0.2230.632
11.25 mW0.2500.709
21.58 mW0.2810.796
31.99 mW0.3150.893
42.51 mW0.3541.002
53.16 mW0.3971.124
63.98 mW0.4461.261
75.01 mW0.5001.415
86.3 mW0.5611.588
97.94 mW0.6301.782
1010 mW0.7072.000
1112.58 mW0.7932.244
1215.84 mW0.8902.517
1319.95 mW0.9982.825
1425.11 mW1.1203.169
1531.62 mW1.2573.556
1639.81 mW1.4103.990
1750.11 mW1.5834.477
1863.09 mW1.7765.023
1979.43 mW1.9925.636
20100 mW2.2366.324
21125.8 mW2.5087.096
22158.5 mW2.8157.962
23199.5 mW3.1588.933
24251.2 mW3.54310.023
25316.2 mW3.97611.246
26398.1 mW4.46112.619
27501.2 mW5.00514.158
28630.9 mW5.61615.886
29794.3 mW6.30217.825
301 W7.07120.000
311.25 W7.93322.440
321.58 W8.90125.178
331.99 W9.98828.250
342.51 W11.20631.697
353.16 W12.57435.565
363.98 W14.10839.905
375.01 W15.83044.774
386.31 W17.76150.237
397.94 W19.92856.367
4010 W22.36063.245
4112.58 W25.08970.962
4215.84 W28.15079.621
4319.95 W31.58589.336
4425.12 W35.439100.23
4531.62 W39.763112.46
4639.81 W44.615126.19
4750.12 W50.059141.58
4863.09 W56.167158.86
4979.43 W63.020178.25
50100 W70.710200.00
51125.9 W79.338224.40
52158.5 W89.019251.78
53199.5 W99.881282.50
54251.2 W112.06316.97
55316.2 W125.74355.65
56398.1 W141.08399.05
57501.2 W158.30447.74
58630.9 W177.61502.37
59794.3 W199.28563.67
601000 W223.60632.45
611259 W250.89709.62
621585 W281.50796.21
631995 W315.85893.36
642512 W354.391002.37
653162 W397.631124.68
663981 W446.151261.91
675012 W500.591415.89
686309 W561.671588.65
697943 W630.201782.50
7010000 W707.102000.00