F5DQK August 2008 Getting started on 10 GHz band2
Overview
On 10 GHz, not many hams did build anything at industrial scale.
-Before 1995 the only choice was the 10 GHz SSB-Electronic transverter Kits and also total assemblies, but only a few « on shelf » ready to use ones.- After 1997, DB6NT did really democratise the SHF transverter. Not only on 10 but from 1.3 to 24 GHz and also above.
-In 2008 the 3rd generation with a 106.5 MHz self Quarz oscillating LO is replaced by a tcxo locked to a 10 or 100 MHz precision reference frequency (also GPS referenced)
F5DQK August 2008 Getting started on 10 GHz band3
1- 10 GHz beacons, SCPs and QSOs from JN18gr
4- Indoor, then outdoor operations with a single 49 cm Procom dish
- Positive tension added on Tx mode to the 144 MHz coaxial cable for PTT purposes- S-meter desensibilisation
3- 10 GHz DB6NT transverter- Version 1:
-schematics & practical- LO frequency drift
5- FT-817nd modifications
6- Prime-focus & offset dish gain comparaison
7- IK1GEX 5.7 / 10 GHz double horn- Isolation measures between both bands
8- Antenna settings of well known french « hyper » dXers
Abstract
- Versions 2 and 3 : Rx Nf and principally LO stability improvements
2- 10 GHz SSB-Electronic transverter (<1995)
F5DQK August 2008 Getting started on 10 GHz band5
10 GHz beacons
QTH F (MHz) D (Km) Dir FT-817nd T>30 min Comments
F5XBD/77 JN18js Favières .072 17 73° .0775 F5HRY .072
F5ZTR/60 JN09xj Beauvais .842 88 329° .842
F1XAI/45 JN07wt Orléans .865 115 207° .838 .855 .858 .842 .851 prévue sur .860
F5ZWM/19 JN05we .919 395 188°
F1XAU/21 JN27ih .825 165 133°
F5ZPS/33 IN94qt .282 496 210°
F1URI/73 JN35kt Mt Blanc .928 461 133°
F6KPL/50 IN99io .315à.321 290° Pas dans la table !
LX1DB JN39co .893 282 69°
HB9EME JN36lx .866 277 33° Essais
HB9AK JN47li .985
ON?? JO20ht .875 572 82°
DB0UX JN59bd .882 572 82°
DB0JK JO30lx .874 401 50°
Beacons direction from JN18gr
Synthé règlé à 10368.100 MHz donne 144.110 MHzAppel sur .100 réel ou .125 affichés
Voie de service 144.390 MHzAppel sur 10368.100 MHz
F5DQK August 2008 Getting started on 10 GHz band6
10368.072 MHz
HB9EME/b 10368.866 MHz
French 10 GHz beacon list
QRT définitif dpt 43 ?
Constantly
50% time
Occasionally (RS)
10 GHz beacons
F5DQK August 2008 Getting started on 10 GHz band7
10 GHz rXed beacons from JN18 : geographical positions
Constantly
50% time
Occasionally (RS)
F5DQK August 2008 Getting started on 10 GHz band8
10 GHz SCPs for RS
Example of qso with F6DRO via scp in JN26SCP = scatter pointRS = rain scatter (thick thunderstorm cumulonibus)
F5DQK
F6DRO
F5DQK August 2008 Getting started on 10 GHz band9
June /July 5008 from JN18gr via tropo & principally RS
10 GHz QSO’s
F5DQK August 2008 Getting started on 10 GHz band10
2- 10 GHz SSB-Electronic
- 2 separate Rx and Tx mixers boxes- 2.556 GHz self oscillating LO with 106.5 MHz quarz- Pout > +20 dBm or 100 mW
F5DQK August 2008 Getting started on 10 GHz band11
10 GHz SSB-Electronic TransverterRx converter scheme
F5DQK August 2008 Getting started on 10 GHz band12
Rx converter layout
10 GHz SSB-Electronic Transverter
F5DQK August 2008 Getting started on 10 GHz band13
Tx converter scheme
10 GHz SSB-Electronic Transverter
F5DQK August 2008 Getting started on 10 GHz band14
Tx converter layout
10 GHz SSB-Electronic Transverter
F5DQK August 2008 Getting started on 10 GHz band15
10 GHz SSB-Electronic Transverter2.556 GHz local oscillator
F5DQK August 2008 Getting started on 10 GHz band16
10 GHz SSB-Electronic TransverterBoxed transverter
XTM-1 above XRM-1 under
2.556 GHz LO Output PA DC/DC converter
SMA/WR-90 transition
24V TRx relay
F5DQK August 2008 Getting started on 10 GHz band17
3a- 10 GHz DB6NT transverter vers 1
That was my choice
- 1 Rx and Tx box- same 2.556 GHz self oscillating LO with 106.5 MHz quarz- Pout = +7 dBm or 5 mW
F5DQK August 2008 Getting started on 10 GHz band18
10 GHz DB6NT Transverter
V1 : Pout 10 à 15mW, NF=3dB
15mW(1991)
bufferX4
LO 10.224 GHz
2.556 GHz
144 MHz
10.368 GHz
Transverter version 1Tx
Rx
F5DQK August 2008 Getting started on 10 GHz band19
10 GHz DB6NT TransverterTransverter version 1 layout
NF=3dB
Pout 10 à 15mW
10.368 GHz resonators
5.112 GHz resonator
F5DQK August 2008 Getting started on 10 GHz band20
2.556 GHz LO in
10 GHz DB6NT TransverterTransverter version 1 hardware
F5DQK August 2008 Getting started on 10 GHz band21
10 GHz DB6NT TransverterOutside 2.556 GHz MKU25 LO with 106.5 MHz quarz
X4 inside the transverter
F5DQK August 2008 Getting started on 10 GHz band22
10 GHz DB6NT TransverterAlternative to constant LO drift with temperature: JWM Model 2556-ALN phase locked oscillator
2.556 GHz +17 dBm10 to 12 dB attenuator needed
10 or 100 MHz ref in
Ext lockin output
Price 289.95 $
F5DQK August 2008 Getting started on 10 GHz band23
10 GHz DB6NT Transverter5 to 200 mW first amp
16 dB gain
F5DQK August 2008 Getting started on 10 GHz band24
10 GHz DB6NT TransverterHEMT Nf=1 dB, gain=24 dB preamp
F5DQK August 2008 Getting started on 10 GHz band25
0.1Win/1.3Wout 11 dB amp I=0.5A
DG1VL preamp23 dB, Nf=1.3 dB
+12V TRx relay
5mWin/200mWout 15 dB amp
+12V DC relay
Pin 144 MHz <= 2WPout 10 GHz fiche N 29.8 dBm ou 0.76WPout direct 31.02 dBm ou 1.26W
Rx 12V 180 mA, Tx 1.15 A
-0.7 dB !!
-0.3 dB
DB6NT transverter V1, Pout=15 mW
-0.08 dB
10 GHz transverter inside view
10 GHz DB6NT Transverter
-0.3 dB
LO = 2.556 GHz soit(106.5 x 24), P=10 mW
F5DQK August 2008 Getting started on 10 GHz band26
-0.18 instead of -0.7 dB
Transverter version 1
10 GHz transverter : how getting 0.5 dB more on Tx
10 GHz DB6NT Transverter
F5DQK August 2008 Getting started on 10 GHz band27
10 GHz DB6NT Transverter
Oscillator drift after ½ hour heating compared to F5XBD/b 77 frequency
T °C Oscillator drift (kHz)
+21 +10
+25 0
+30 -20
F5DQK August 2008 Getting started on 10 GHz band28
3b- 10 GHz DB6NT transverter vers 2
- Whole 10.224 GHz LO with 106.5 MHz quarz inside- External 106.5 MHz LO input for far better stability- Pout = +23 dBm or 200 mW
F5DQK August 2008 Getting started on 10 GHz band29
10 GHz DB6NT TransverterTransverter version 2(2003)
NOW: like V1 and-Pout=200 mW, nF=1.2 dB-LO totally on same board
Option 1 is:-106.5 MHz external ocxo fitting a subsidiary SMA connector
F5DQK August 2008 Getting started on 10 GHz band30
10 GHz DB6NT TransverterTransverter version 2 layout
F5DQK August 2008 Getting started on 10 GHz band31
10 GHz DB6NT TransverterTransverter version 2 hardware
106.5 MHz separate ocxo
LO feeding
F5DQK August 2008 Getting started on 10 GHz band32
10 GHz DB6NT TransverterTransverter version : ocxo schematic (Eisch-Kafka)
F5DQK August 2008 Getting started on 10 GHz band33
3c- 10 GHz DB6NT transverter vers 3
-LO=106.5 MHz ocxo at 40°C-External 10 MHz ref input for rock stability (ocxo or GPS)-Tx Nf improvement
F5DQK August 2008 Getting started on 10 GHz band34
10 GHz DB6NT Transverter10 GHz DB6NT TransverterTransverter version 3(2007)
NOW: like V2 and-106.5 MHz with internal PLL-LO with internal oven-Ext 10 MHz ref input for frequency stability like the GPS
F5DQK August 2008 Getting started on 10 GHz band37
10 GHz DB6NT Transverter
First RS tryings with open window in the shack room
Alu fixation tube fordefinitive 3 to 5° elevation
DC bias-tee for 1st Tx tries
25M DC wire for ΔV measuresin future mast mounting
F5DQK August 2008 Getting started on 10 GHz band39
10 GHz DB6NT Transverter
Summer configuration « complement »
F5DQK August 2008 Getting started on 10 GHz band40
10 GHz DB6NT Transverter
Procom Φ48 cm prime-focus dish F/D=0.4F=19.2 cmGain 27 dBd (37 dBd à 24 GHz)
Elévation 3 à 5°
Zoom on 10 GHz ensemble
F5DQK August 2008 Getting started on 10 GHz band41
10 GHz DB6NT Transverter
Transverter 10 GHz sous 12V :- Rx 180 mA- Tx, 1.15A- Pout max avant transition guide –3 + 32.82 = 29.82 dBm ou 960 mW- Pout sortie directe ampli 1.2W 29.8 dBm ou 0.76W
12.77V descendent à 12.2 V dans 25 m câble 2 x 1.5 mm2ΔV = - 0.52V
Pin 144 MHz <= 2WPout 10 GHz fiche N 29.8 dBm ou 0.76WPout direct 31.02 dBm ou 1.26W
Le point de rain-scatter se comporte comme une antenne avec un diagramme de rayonnement qui est celui d'un dipole, dont l'un des max est orienté vers l'observateur (diagramme en 8). Ce diagramme présente des nuls à 90 degrés et évolue en sinus carré ( en densité de puissance), çàd que l'énergie reçue est plus ou moins forte selon où se trouve le correspondant.Dans les cas où ceux-ci sont du côté des 90°+/- 10 deg, ça ne marche pas .
DC & RF measures
F5DQK August 2008 Getting started on 10 GHz band42
5- FT-817nd mods for Tx purposes
-Gives a positive voltage in the 144 MHz coaxial while tXing
F5DQK August 2008 Getting started on 10 GHz band43
10 GHz DB6NT Transverter
FT-817nd mod for DC addition in coax while Txing (upper side)
BNC socket
4.7 kΩ
1 nF serial cap
DB6NT transverters need +V in coax cable for switching in Tx mode !!
Or « reversal PTT » !!
F5DQK August 2008 Getting started on 10 GHz band44
10 GHz DB6NT Transverter
-TX OFF - appuyer simultanément sur A B et C et conserver les 3 BP enfoncés - mettre en marche le 817 envoie une série de bips et passe en mode config - sélecteur à gauche pour faire défiler les menus - choisir menu 5 VHF RXG ( gain Réception en VHF ) valeur initiale=128 - descendre à la valeur 56 S1 de QRM ce qui ne saturera plus le FT-817nd
FT-817nd desensibilisation procedure
With only noise, S-meter then drops doww from S8 to S1 to the 144 MHz Rx
Atténuation pour ramener S8 à S1 dans la ligne 144 MHz : environ 14 dB
F5DQK August 2008 Getting started on 10 GHz band45
10 GHz DB6NT Transverter
FT-817nd automatic CW with MixW2 : configuration
FT-817nd en mode USB
F5DQK August 2008 Getting started on 10 GHz band47
Appareil utilisé F lue (GHz) Après
Synthé HP 8672a 10368.00
Compteur Marconi 2440 10368.0000 5 min à TCXO
Analyseur spectre Tektronix 494 span 50 Hz 10367.999 20 min à TCXO
Analyseur spectre Tektronix 492bp span 200 Hz 10368.0495 1H dérive naturelle
Synthé HP 862a Tektro 492bp Tektro 494
Sortie FI (MHz) RF 10368.00 144.0129 144.012
Mesure LO de 10224 MHz 10224.0326 10223.986
Frequency stability measures after ½ hour
10 GHz DB6NT Transverter
F5DQK August 2008 Getting started on 10 GHz band48
Gain comparaison of prime-focus and offset dishes
10 GHz DB6NT Transverter
Dish Heigth (cm) Width (cm) Depth (cm) Gain
Procom Prime-focus 49 49 na 32 calculés
Worldsat offset 80 73 6.4 36.1
Echostar offset 131 121 11.5 40.5
F5DQK August 2008 Getting started on 10 GHz band50
IK1GEX 5.7 & 10 GHz double Horn
10 to 5.7 GHz isolation 5.7 to 10 GHz isolation
10 GHz feeding – measures on 5.7 GHz SMA input
NB: in opposite side of a coax cable, the guide acts like a HIGHPASS filter !!
Target : double 5.7 & 10 GHz feeding on one same 80 cm offset dish
Cure : far better isolation must be done on the 5.7 GHz Rx
Scalar analyser HP 8757a + sweep HP 8350b
F5DQK August 2008 Getting started on 10 GHz band51
IK1GEX 5.7 & 10 GHz double Horn
Compromise of different phase center positions on each band
- Dixit F6DRO, the gain on each band cannot be optimised - - the phasing center on every band is at 2 different locations.- Not yet discussed- Under construction
F5DQK August 2008 Getting started on 10 GHz band56
Trépied F1PDX + 74 cm offset
Environ 25 à 30°
Fixation à retourner de 180° ?
Environ 55°
Poids 5.2 Kg
F5DQK August 2008 Getting started on 10 GHz band58
Antenna setup of F5HRY50 MHz DXSR 3 élts
1296 MHz F9FT 4 x 23 élts
144 MHz 10 élts
432 MHz F9FT 9 élts
2300 MHz Wimo 2 x 40 élts
5.7 GHz Prime focus Φ 7010 GHz offset Φ 75
24 GHz Andrew Φ 33 60W
9W12W
0.5W
F5DQK August 2008 Getting started on 10 GHz band59
Antenna setup of F6APE
10 GHz Prime focus Φ 60
1st TOWER
3 W
F5DQK August 2008 Getting started on 10 GHz band60
Setup of F8BRK
10 GHz Prime focus Φ 858 W
3 W out
DB6NT preamp
Sequencer
DB6NT 2W amp
5.7 GHz Prime focus Φ 150