1 / 61

Getting started on 10 GHz

Getting started on 10 GHz. 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.

odessa-floyd
Download Presentation

Getting started on 10 GHz

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Getting started on 10 GHz Getting started on 10 GHz band

  2. 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) Getting started on 10 GHz band

  3. Abstract 1- 10 GHz beacons, SCPs and QSOs from JN18gr 2- 10 GHz SSB-Electronic transverter (<1995) 3- 10 GHz DB6NT transverter • Version 1: • schematics & practical • LO frequency drift • Versions 2 and 3 : Rx Nf and principally LO stability improvements 4- Indoor, then outdoor operations with a single 49 cm Procom dish 5- FT-817nd modifications • - Positive tension added on Tx mode to the 144 MHz coaxial cable for PTT purposes • S-meter desensibilisation 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 Getting started on 10 GHz band

  4. 1- 10 GHz beacons and QSOs with 1W Getting started on 10 GHz band

  5. 10 GHz beacons Beacons direction from JN18gr Synthé règlé à 10368.100 MHz donne 144.110 MHz Appel sur .100 réel ou .125 affichés Voie de service 144.390 MHz Appel sur 10368.100 MHz Getting started on 10 GHz band

  6. 10 GHz beacons French 10 GHz beacon list 10368.072 MHz Constantly 50% time Occasionally (RS) QRT définitif  dpt 43 ? HB9EME/b 10368.866 MHz Getting started on 10 GHz band

  7. 10 GHz rXed beacons from JN18 : geographical positions Constantly 50% time Occasionally (RS) Getting started on 10 GHz band

  8. 10 GHz SCPs for RS Example of qso with F6DRO via scp in JN26 SCP = scatter point RS = rain scatter (thick thunderstorm cumulonibus) F5DQK F6DRO Getting started on 10 GHz band

  9. 10 GHz QSO’s June /July 5008 from JN18gr via tropo & principally RS Getting started on 10 GHz band

  10. 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 Getting started on 10 GHz band

  11. 10 GHz SSB-Electronic Transverter Rx converter scheme Getting started on 10 GHz band

  12. 10 GHz SSB-Electronic Transverter Rx converter layout Getting started on 10 GHz band

  13. 10 GHz SSB-Electronic Transverter Tx converter scheme Getting started on 10 GHz band

  14. 10 GHz SSB-Electronic Transverter Tx converter layout Getting started on 10 GHz band

  15. 10 GHz SSB-Electronic Transverter 2.556 GHz local oscillator Getting started on 10 GHz band

  16. 10 GHz SSB-Electronic Transverter Boxed transverter XTM-1 above XRM-1 under SMA/WR-90 transition 24V TRx relay 2.556 GHz LO Output PA DC/DC converter Getting started on 10 GHz band

  17. 3a- 10 GHz DB6NT transverter vers 1 • 1 Rx and Tx box • same 2.556 GHz self oscillating LO with 106.5 MHz quarz • Pout = +7 dBm or 5 mW That was my choice Getting started on 10 GHz band

  18. 10 GHz DB6NT Transverter Transverter version1 Tx (1991) LO 10.224 GHz 15mW 2.556 GHz X4 buffer 10.368 GHz 144 MHz Rx V1 : Pout 10 à 15mW, NF=3dB Getting started on 10 GHz band

  19. 10 GHz DB6NT Transverter Transverter version1 layout NF=3dB Pout 10 à 15mW 10.368 GHz resonators 5.112 GHz resonator Getting started on 10 GHz band

  20. 10 GHz DB6NT Transverter Transverter version1 hardware 2.556 GHz LO in Getting started on 10 GHz band

  21. 10 GHz DB6NT Transverter Outside 2.556 GHz MKU25 LO with 106.5 MHz quarz X4 inside the transverter Getting started on 10 GHz band

  22. 10 GHz DB6NT Transverter Alternative to constant LO drift with temperature: JWM Model 2556-ALN phase locked oscillator Ext lockin output 2.556 GHz +17 dBm 10 to 12 dB attenuator needed 10 or 100 MHz ref in Price 289.95 $ Getting started on 10 GHz band

  23. 10 GHz DB6NT Transverter 5 to 200 mW first amp 16 dB gain Getting started on 10 GHz band

  24. 10 GHz DB6NT Transverter HEMT Nf=1 dB, gain=24 dB preamp Getting started on 10 GHz band

  25. 10 GHz DB6NT Transverter 10 GHz transverter inside view -0.7 dB !! -0.3 dB +12V DC relay LO = 2.556 GHz soit (106.5 x 24), P=10 mW -0.3 dB +12V TRx relay -0.08 dB DG1VL preamp 23 dB, Nf=1.3 dB 0.1Win/1.3Wout 11 dB amp I=0.5A 5mWin/200mWout 15 dB amp Pin 144 MHz <= 2W Pout 10 GHz fiche N 29.8 dBm ou 0.76W Pout direct 31.02 dBm ou 1.26W Rx 12V 180 mA, Tx 1.15 A DB6NT transverter V1, Pout=15 mW Getting started on 10 GHz band

  26. 10 GHz DB6NT Transverter 10 GHz transverter : how getting 0.5 dB more on Tx -0.18 instead of -0.7 dB Transverter version1 Getting started on 10 GHz band

  27. 10 GHz DB6NT Transverter Oscillator drift after ½ hour heating compared to F5XBD/b 77 frequency Getting started on 10 GHz band

  28. 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 Getting started on 10 GHz band

  29. 10 GHz DB6NT Transverter Transverter version2 (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 Getting started on 10 GHz band

  30. 10 GHz DB6NT Transverter Transverter version2 layout Getting started on 10 GHz band

  31. 10 GHz DB6NT Transverter Transverter version2 hardware 106.5 MHz separate ocxo LO feeding Getting started on 10 GHz band

  32. 10 GHz DB6NT Transverter Transverter version: ocxo schematic (Eisch-Kafka) Getting started on 10 GHz band

  33. 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 Getting started on 10 GHz band

  34. 10 GHz DB6NT Transverter 10 GHz DB6NT Transverter Transverter version3 (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 Getting started on 10 GHz band

  35. 10 GHz DB6NT Transverter Getting started on 10 GHz band

  36. 4- 10 GHz indoor & outdoor tryings Getting started on 10 GHz band

  37. 10 GHz DB6NT Transverter First RS tryings with open window in the shack room Alu fixation tube for definitive 3 to 5° elevation DC bias-tee for 1st Tx tries 25M DC wire for ΔV measures in future mast mounting Getting started on 10 GHz band

  38. 10 GHz DB6NT Transverter Transverter DC pinning Getting started on 10 GHz band

  39. 10 GHz DB6NT Transverter Summer configuration « complement » Getting started on 10 GHz band

  40. 10 GHz DB6NT Transverter Zoom on 10 GHz ensemble Procom Φ48 cm prime-focus dish F/D=0.4 F=19.2 cm Gain 27 dBd (37 dBd à 24 GHz) Elévation 3 à 5° Getting started on 10 GHz band

  41. 10 GHz DB6NT Transverter DC & RF measures • 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 mm2 ΔV = - 0.52V Pin 144 MHz <= 2W Pout 10 GHz fiche N 29.8 dBm ou 0.76W Pout 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 . Getting started on 10 GHz band

  42. 5- FT-817nd mods for Tx purposes • Gives a positive voltage in the 144 MHz coaxial while tXing Getting started on 10 GHz band

  43. 10 GHz DB6NT Transverter FT-817nd mod for DC addition in coax while Txing (upper side) Or « reversal PTT » !! BNC socket 4.7 kΩ 1 nF serial cap DB6NT transverters need +V in coax cable for switching in Tx mode !! Getting started on 10 GHz band

  44. 10 GHz DB6NT Transverter FT-817nd desensibilisation procedure With only noise, S-meter then drops doww from S8 to S1 to the 144 MHz Rx • 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 Atténuation pour ramener S8 à S1 dans la ligne 144 MHz : environ 14 dB Getting started on 10 GHz band

  45. 10 GHz DB6NT Transverter FT-817nd automatic CW with MixW2 : configuration FT-817nd en mode USB Getting started on 10 GHz band

  46. 6- 10 GHz dish comparaison Getting started on 10 GHz band

  47. 10 GHz DB6NT Transverter Frequency stability measures after ½ hour Getting started on 10 GHz band

  48. 10 GHz DB6NT Transverter Gain comparaison of prime-focus and offset dishes Getting started on 10 GHz band

  49. 7- 10 /5.7 GHz IK1GEX double horn Getting started on 10 GHz band

  50. IK1GEX 5.7 & 10 GHz double Horn 10 to 5.7 GHz isolation 5.7 to 10 GHz isolation Scalar analyser HP 8757a + sweep HP 8350b 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 NB: in opposite side of a coax cable, the guide acts like a HIGHPASS filter !! 10 GHz feeding – measures on 5.7 GHz SMA input Getting started on 10 GHz band

More Related