Central States VHF Society

Exploring the World Above 50MHz since 1965

  • Digital Communications
    A great number of exciting new digital operating modes have developed, largely because of the availability of personal computers, soundcards, and advanced software. But amateur digital communication began in earnest in the late 1940's (if you don't count Morse as a digital mode!) when hams worked out techniques of connecting mechanical Teletype keyboard/printers to amateur gear using FSK and AFSK modulation. WSJT has become a very popular tool for digital communications. FSK441 mode is in use for meteor scatter contacts and JT65 is popular for terrestrial communications.More Info
  • EME Moonbounce
    Amateur radio (ham) operators utilize EME for two-way communications. EME presents significant challenges to amateur operators interested in working weak signal communications. Currently, EME provides the longest communications path any two stations on Earth can utilize for bi-directional communications. Amateur operations use VHF, UHF and microwave frequencies. All amateur frequency bands from 50 MHz to 47 GHz have been used successfully, but most EME communications are on the 2 meter, 70-centimeter, or 23-centimeter bands. Common modulation modes utilized by amateurs are continuous wave with Morse Code, digital (JT65) and when the link budgets allow, voice..More Info
  • Aurora and Solar Weather
    The interaction between Earth's magnetic field and Solar particles is a complex and mysterious field of science. The storm events involve high electric currents in the ionosphere and vast amounts electric power affecting to great many things. One of the ways to observe what is happening up there, is to detect the effects of these phenomena to non ionizing long wave electromagnetic radiation - radio waves.More Info
  • VHF Contesting and Rover Operations
    Hams have been putting stations in their cars since the Twenties (1920's that is). Today, there is great satisfaction in facing the challenge of installing a transceiver in our small cars and pick-ups, using somewhat inefficient antennas, and still being able to make contacts with hams thousands of miles away while "tooling" down the highway.More Info
  • Annual Technical Conference
    Every year since 1968, during the last weekend in July, the Central States VHF Society hosts an annual technical conference. There are two days of technical presentations, antenna range gain measurements, noise figure measurements, a flea market, and often times a vendor area. It's a great time to learn about weak signal VHF communications and an excellent place to network and catch up with old friends.More Info

2010 Noise Figure (NF) Results

Tested in St Louis, MO - July 23, 2010

 

50 MHzCallDesignDeviceNF (dB)Gain (dB)
N2CEIDEMIFPD7500.6219
KM0AMirageGaSaFET0.8514.6
 
144 MHzCallDesignDeviceNF (dB)Gain (dB)
W3XOHB 0.5316.3
W9SVHBMFG13020.5523
KM0AARRSP144VDG0.5724.0
W9RVGARRARR-2X0.7523.7
W9RVGARRSP144VD1.219.0
HeilParks144-15 
 
222 MHzCallDesignDeviceNF (dB)Gain (dB)
K0MHCDEMI 0.4321.8
W9SZHB 0.4521.1
N2CEIDEMIL222-280.8918.8
W9RVGARRARR-2X2.513.3
 
432 MHzCallDesignDeviceNF (dB)Gain (dB)
WD5AGOCavityATF351430.2433.3
N2CEIDEMIFPD 7500.3318
K0MHCDEMI 0.8520.6
WD0FCHDEMI#60.8519.5
WD0FCHLC#40.9514
N2CEIDEMI converterL432-28120.6
W9RVGARRMSP432VDG-1691.118.9
WD0FCHDEMI#11.116
W9SZLC 1.214
WD0FCHLC#32.314.7
W3XOLCBFR912.738
 
902 MHzCallDesignDeviceNF (dB)Gain (dB)
WD0FCHHB 0.4516.2
K0MHCDEMI 0.518.6
K4QFHBMMIC0.733.4
WD0FCH  1.321
 
1296 MHzCallDesignDeviceNF (dB)Gain (dB)
WD5AGOHB AGOMGF4919/MGA650.1540
WD5AGOAGO RefNE325/ATF2110.232.5
W9IIXAGONE325/ATF2110.2533.9
KA9VGGHB 0.2841.2
K4QFHBMMIC0.5232.2
WD0FCH  0.8418.6
K0MHCDEMIATF101362.612.1
 
2304 MHzCallDesign DeviceNF (dB)Gain (dB)
WD5AGOHB AGO RefNEC3210/MGA660.3126.2
WD5AGOHB AGOMGF4919/MGA650.3332.2
W9IIXAGONE325/ATF2110.3629.2
W9IIXAGONE325/NGA6510.3832
KA9VGGHB 0.8938
K4QFHBMMIC1.120.8
 
3456 MHzCallDesign DeviceNF (dB)Gain (dB)
WD5AGOHB AGO RefNE3210/MGA660.5825.1
KA9VGGHB 0.6831.2
 
5760 MHzCallDesign DeviceNF (dB)Gain (dB)
WD5AGOHB AGONEC3210/FHC40.7530
WD5AGOHB convFHC3.521
 
10368 MHzCallDesign DeviceNF (dB)Gain (dB)
W0FMSDEMI converter 4.120


2009 Noise Figure (NF) Results

Tested in Elk Grove Village, IL - July 24, 2009

 

50 MHzCallDesign DeviceNF (dB)Gain (dB)
K4SMEN2GEEKFPD 750 890.3520.7
WA9FIHARRGaAsFet0.7825
N5VYNARRP50VDG1.3522.5
 
144 MHzCallDesign DeviceNF (dB)Gain (dB)
K9LQZ &bnsp;0.3524.7
KL6MHB w/relaysMGF 13020.4519.6
K9PWHB w/relaysMRF 9660.4817.2
KL6MHB w/transco & smaMGF13020.5719.5
KA9VGGHB LN2 0.7035.0
KA9VGGHB LN1 0.8534.6
K0AWUDEMI 1.4021.2
W0FYW6POMGF13021.6511.2
K9LQZARR 1.7713.4
K9LQZCommercial 1.8032.0
KA9VGGHB A2 2.8125.7
KA9VGGHB A1 3.4025.4
WA9FIHLandwher 4.5212.2
 
222 MHz - none tested
 
432 MHzCallDesign DeviceNF (dB)Gain (dB)
K4SMEHB N2GEEKFPD 750-890.4022.1
KA9VGGHBLN-1 LP 7500.6134.3
KL6MHB w/transco & smaMGF 13020.8015.7
AF4JFDEMIATF 101360.8016.8
N5VYNARR P43VDG 2.0116.9
 
902/903 MHzCallDesign DeviceNF (dB)Gain (dB)
W9SZHB FPD 750 @ 6V0.9021.1
 
1296 MHzCallDesign DeviceNF (dB)Gain (dB)
K8EBG4DDK kitNE3240.2639.2
KL6MW7CNKATF360770.3135.0
K8EBW7CNKATF 360770.3935.4
KL6MHB W7CNKATF 360770.3934.7
KA9VGGHBLP 7500.6329.6
K9SRBDEMI Troy ME 0.6516.6
K9SRBDEMI Troy ME 0.7412.6
WA9FIHParabolicGaAsFet0.9212.1
W9SZHBFPD 750 0.9518.0
WA9FIHSSB SP-23GaAsFet1.5718.4
K0CQHBMSA06853.1012.9
 
2304 MHzCallDesign DeviceNF (dB)Gain (dB)
KL6MDEMI W5LUAATF 360770.4518.2
K8EBG4DDK kit 0.7023.6
VE3ADQConifer PA1033 1.4111.1
KA9VGGHB LN2 1.5721.6
KA9VGGHB LN1 1.7522.1
KA9VGGHB A2 2.1324.1
KA9VGGHB A1 2.1825.3
 
3456 MHzCallDesign DeviceNF (dB)Gain (dB)
K8EBG4DDK kit 0.9422.6
K8EBLUA 0.9413.5
KA9VGGHBLN-1 LP 7506.1512.0
 
5760 MHzCallDesign DeviceNF (dB)Gain (dB)
KL6MJCA Tech 0.9231.7
 
10368 MHzCallDesign DeviceNF (dB)Gain (dB)
KL6MJCA Tech 2.2612.5
VE3ADQJCA Tech 3.3534.2
 
24192 MHzCallDesign DeviceNF (dB)Gain (dB)
W9XAW2PED @ 5V 2.2128.4
K9PWHB XVTR 3.9026.9
WA2VOIW0EOM 4.2315.8
WA2VOIW0EOM  4.9315.8
 
47088 MHzCallDesign DeviceNF (dB)Gain (dB)
VE4MAW0EOM Surplus 3.4017.5
VE4MADB6NT 472XP 5.037.0
W5LUAAMMC 6241 5.1515.3

Testing by: W5LUA and WA8RJF
Equipment Supplied by W5LUA and K9PW
Measurement Accuracy +/- 0.2 dB at 10 GHz and below
Compiled by WA8RJF and W9GA

14.22 MHzCallDesign DeviceNF (dB)Gain (dB)
K0CQG3SBIJ3102.0811.1
K0CQHBMSA06852.3329.0

2007 Noise Figure (NF) Results

Tested in San Antonio, TX - July 26, 2007

 

50 MHzCallDesign DeviceNF (dB)Gain (dB)
WA2HNHBMGF13020.2925.42
WA2HNHBFHX76LP0.5430.76
JH0WJFHB2SC33560.819.6
WA2HNHBFHC40LG0.9530.44
WA2HNHBFHC40LG1.2232.1
VE3ADQMinicircuitsMCL ZFL-10006.7119.3
 
144 MHzCallDesign DeviceNF (dB)Gain (dB)
WA2HNHBFHC40LG0.2827.0
WA2HNHBFHX76LP0.3424.0
JH0WJFHB2SC33562.022.0
N0GZHBJ3103.4710.7
W0ZQARR 0.6725.6
WA5VJBParks6CW43.5222.61
 
222 MHz – none tested
 
432 MHzCallDesign DeviceNF (dB)Gain (dB)
WA2HNHBFHX76LP0.2821.4
WA2HNHBFHC40LG0.2924.6
WD5AGOHBATF 331430.4118.4
JH0WJFHB2SC33560.9815.5
JH0WJFHB2SC33561.014.8
K5QEAGOATF 341430.422
K6MYCK6HCP432-NRY0.4218
K5PJRCommercial SSB LNA0.4620.7
VE3ADQARRP432VD #11.9715.6
VE3ADQARRP432VD#22.015.1
 
902/903 MHzCallDesign DeviceNF (dB)Gain (dB)
VE3ADQHBMAX26401.3513.7
VE3ADQMinicircuitsMCL ZFL-10006.5519.2
 
1296 MHzCallDesign DeviceNF (dB)Gain (dB)
WW2RHBNE325/ATF101360.2535.8
G4DDKHBNE325/NE5410.2534.9
G4DDKHBATF36077/NE5410.3534.2
WD5AGOAGOATF36077/MGA615630.2937.0
K6MYCAGO-2-23CM 0.1832.8
K6MYCW6HD 0.2719.4
WB2BYPAGONE3210.2931.8
WB2BYPDEMI 0.3418.7
K6MYCK6HCP1296-NRY0.4217.1
W0ZQDEMI 0.4518.4
K6MYCK6HCP1296-RY0.5020.6
 
2304 MHzCallDesign DeviceNF (dB)Gain (dB)
WD5AGOAGO36077/ATF 211860.3528.45
WD5AGOAGONE3210/ATF 211860.3625.47
WD5AGOAGO/LUA36077/MGA 615630.4429.9
WW2RAGONE325/ATF101360.6817.44
K5QEDEMI 13ULNA 0.4818.7
K5QEDEMI 13ULNASN57200.4817.7
 
3400 MHzCallDesign DeviceNF (dB)Gain (dB)
G4DDKHBATF 360770.8239.30
WW2RDEMI360770.6915.20
 
3456 MHz – none tested
 
5760 MHzCallDesign DeviceNF (dB)Gain (dB)
WD5AGOAGOATF 36077/FSCM1.0628.4
WD5AGOLUAATF 360771.3610.4
 
10368 MHz – none tested
 
24192 MHzCallDesign DeviceNF (dB)Gain (dB)
W4EFZDB6NT 3.1224

Testing by: W5LUA, WD5AGO and WA8RJF
Equipment: HP 8970B and AIL 2075 supplied by Avago Technologies, W5LUA and WD5AGO
Measurement Accuracy +/- 0.2 dB at 10 GHz and below


2008 Noise Figure (NF) Results

Tested in Wichita, KS - July 25, 2008

 

50 MHzCallDesign DeviceNF (dB)Gain (dB)
WA2HNHBFHC40LG0.3527.4
WA2HNHBMGF13020.3525.4
WA2HNHBMGF13020.4927.8
WA2HNHBFHX76LP0.7026.4
WA2HNHBFHC40LG1.0126.8
 
144 MHzCallDesign DeviceNF (dB)Gain (dB)
W5UWBLNA TechnologiesATF-331430.1621.9
WA2HNHBMGF4319G0.1722.2
N9XG ATF-541430.2528.0
WA2HN FHX76LP0.4223.6
W9PNULNA TechnologiesATF-341430.4319.0
WA2HN FHC40LG0.4428.1
W5UWBARR 0.522.5
WQ0PHBMGF13020.5320.3
WQ0PHBMGF13020.6316.3
W5UWBARR 0.7624.2
AF4JFDEMIATF-107360.7820.5
N9XG MGF14020.8222.7
WQ0PWD5AGO 1/4l cavityMGF13020.917.0
VFE3ADQDEMIATF-107363.215.4
 
222 MHzCallDesign DeviceNF (dB)Gain (dB)
W5UWBLNA TechnologiesATF-341430.220.3
 
432 MHzCallDesign DeviceNF (dB)Gain (dB)
WA2HNHBFHC40LG0.2325.2
WA2HNHBMGF4319G0.2420.6
N2CEIDEMI prototypeFDP10500.3320.5
WA2HNHBFHX76LP0.3620.1
 
902/903 MHzCallDesign DeviceNF (dB)Gain (dB)
KA9UVYDEMI 33ATF 107360.9319.1
KA9UVYARR P800VDGMGF1302115.0
K5DYYDEMI 33ATF 1013669.5
 
1296 MHzCallDesign DeviceNF (dB)Gain (dB)
NX9GG4DDKATF36077/ATF541430.1937.9
WD5AGOHBNE325/ATF2110.1932.9
N9XGDEMIATF360770.1918.1
K5AZUAGO-LUANE3210S01/MGA615630.2240.2
WB9PNUAGO-LUANE3210S01/MGA615630.2640.0
AF4JFAGO-LUANE3210S01/MGA615630.2835.0
W5UWBWD5AGONE325/ATF211860.2928.0
K8EBG4DDKno cover0.3435.0
K8EBG4DDKw/cover0.4235.0
K8EBDEMIATF107360.6717.1
KF8QLDEMIATF101360.7117.6
WQ0PWB5LUAATF101350.7514.8
K5DYYDEMIATF101360.7719.0
K5AZUDX 1296NE3250.816.0
AF4JFeBay 8.2228.0
 
2304 MHzCallDesign DeviceNF (dB)Gain (dB)
WD5AGOAGO-2-13NE3210S01/ATF211860.3528.9
WD5AGOAGO-2-13 (12-2005)NE325S01/NE325S010.3927.6
W5LUALUA/AGOATF36077/MGA615630.4328.7
K8EBG4DDKATF36077/MGA541430.4925.3
WD5AGOAGO-2-13 (0807-9)NE325S01/ATF211860.532.9
K8EBDEMIATF360770.6217.8
 
3456 MHzCallDesign DeviceNF (dB)Gain (dB)
WD5AGOAGO-9CM #1NE3210S01/MGA615630.4230.5
WD5AGOAGO/LUAATF36077/MGA615630.5928.8
W5LUAAGO/LUAATF36077/MGA615630.6527.3
WD5AGOAGO-9CM #2NE325S01/ATF211860.6821.3
K8EBDEMI/LUAATF360770.8213.8
 
5760 MHz - none tested
 
10368 MHzCallDesign DeviceNF (dB)Gain (dB)
KF8QLcommercial 3.9914.3
 
24192 MHzCallDesign DeviceNF (dB)Gain (dB)
W5LUAHBATF360772.3613.2
W5LUAavantech smw 94-1044 6.924.2
N9XGAydin mwave 7.0725.3

Testing by: W5LUA and WD5AGO
Equipment Supplied by W5LUA and WD5AGO
Measurement Accuracy +/- 0.2 dB at 10 GHz and below
Compiled by WA8RJF


2006 Noise Figure (NF) Results

Tested in Bloomington, MN - July 28, 2006

 

144 MHzCallDesign DeviceNF (dB)Gain (dB)
K5QEcavity 0.3319.8
KL6MN6CAATF541430.4920.8
KL6MHBMGF13020.5421.5
KL6MHBMGF13020.5920.5
W9FZARRMGF13020.6723.5
WD9IVDARRMGF13020.7121.6
W0GHZTokyo 121.7
W0GHZDEMI 1.722.9
NT0VMirage 1.7220
WA2VOIDEMI??1.7411.77
WOGHZDEMI 2.2321.7
N0UKHBMGF13024.629.9
 
222 MHzCallDesign DeviceNF (dB)Gain (dB)
WB0OAJARRLMGF11000.8023.8
W0GHZDEMI 0.8222.6
WA2VOIDEMI 1.1511.68
KL6MHBMGF13021.417.8
W0GHZSSB 1.554.5
 
432 MHzCall DesignDeviceNF (dB)Gain (dB)
KB0OZN????0.4823.0
K5QEAGOATF341430.517.0
K5QEAGOATF341430.5816.3
WA2VOIDEMI 1.0617.4
KD9SGSSB 1.323.8
WB0OAJArrl BookMGF11001.510
NT0VMirage 2.321.0
 
902 MHzCall DesignDeviceNF (dB)Gain (dB)
WA2VOIDEMI 0.719.44
 
1296 MHzCall DesignDeviceNF (dB)Gain (dB)
KL6MCNKATF360770.3534.8
W9IIXAGONE3250.3931.1
VE3ADQHBATF541430.6813.8
N0UKDEMIATF101360.8114.3
WB0OAJHBATF101360.8819.8
NT0VDEMINE3250.9419.2
N9DGDEMI 0.9715.3
W0VBSSB 1.1528.8
K0CJDEMI1296-144 (convrtr)1.814.0
W9RAYDEMI1296-144 (convrtr)2.314.1
W9IIXDEMI 8.512.7
W9FZHBATF10136200.1
 
2304 MHzCall DesignDeviceNF (dB)Gain (dB)
W9IIXAGO 2-stageNE325840.7221.7
KL6MDEMIATF360770.7817.2
W9RAYDEMI2304-144 (convrtr)2.689.5
K0SMCal. Amp.2304-144 (convrtr)2.7318.9
KL6MLUAATF101363.71.5
K0SMCal. Amp.2304-144 (convrtr)4.37.1
N9DGDEMI kit 5.65.3
WB0OAJHB6-Mar84.7
 
3.4 GHzCall DesignDeviceNF (dB)Gain (dB)
KL6MJCA 1.234
N9DGDEMI 1.714
 
5.7 GHzCall DesignDeviceNF (dB)Gain (dB)
KL6MJCA 1.330
K8EBDEMI/LUAATF360771.3712.8
WB0LJC??Farinon1.626
 
10 GHzCall DesignDeviceNF (dB)Gain (dB)
K8EBDB6NT 1.2122.1
WB0LJCW1VTATF360771.2511.5
K8EBDEMI-LUAATF360771.759.23
NT0VDEMI-LUAATF36077220.3
N0UKDEMI10GHz-144 (convrtr)2.79.5

Measurements completed by: K0TAR, VE4MA and WD5AGO
Equipment:
(144 - 1296 MHz): HP8970B (noise figure analyzer) w/HP346B (noise source), n/f reading 0.1dB high
(2304MHz - 10GHz): Agilent N8975A w/N4002 14dB ENR head


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