The Ilmari Project is not a Viestikallio Project, this just happened to be a place where we could host these web-pages...

SUPER ILMARI REALITY CHECK meeting number 4

2002-11-28 at 17:30 - 21:00 EET

Location after last-moment change: Datatie OY auditorium, Malmi, Helsinki

• Going thru notes of (Lab-3) session
• Puzzling over FUCHS-antenna (OH2LH)
  In the end the consensus became that this is an end-fed Hertz (1/2 Lambda) antenna where the high-impedance adapting circuitry uses a number of parasitic capacitances, and therefore the circuitry looks odd.
• 80m beacon-TX prototype works
• Translator has been photographed, demoed, and QSOed. Changes for improvements were also noted. (OH1LRY, OH2AUE) AUE email (finnish) -> AUE's Ilmari page, where among others: whole translator from above, translator VHF receiver, translator UHF driver. Also audio-samples of QSO tests.
• ATV-TX:
  • The Tx itself at OH2LAK's lab
  • Problems in the 1.3 GHz PA; rats-nest prototype yields twice the power what "production unit" does. Embarassing...
• Antennas are serious problem.
  (Latter OH2AUE reported having solved the cross-dipole feed problem.) OH2AUE's Ilmari page (see about Lambda/12 transformers)
  Cross-dipoles, final
• Balloons are being asked (OH1MQK)
• Tether-cutter: OH1MRH takes task of making a tether cutter (burner)
• Tasks:
  • OH2JMS: Power supply designs for subsystems: -18V, +3.0V, +5V
  • OH1MRH: tether cutter/burner
  • OH1MQK: Looking for commercial palloons
• Next meeing location:
  2003-01-18 TTKK, TAMPERE
  (Usually these meetings have been in the evenings during the week (mon-thu), now initial plan was Friday evening, as AUE wants to keep weekends free, while Team Tampere suggested Saturnday daytime (afternoon).