1 / 28

THE K5RWK REPEATER

THE K5RWK REPEATER. HOW IT WORKS By F Cummings, W5LQU August 2009. OUR REPEATER BLOCK DIAGRAM. THE PRESENT RWK REPEATER. BACK OF OUR REPEATER. THE REPEATER. INSIDE THE REPEATER. The repeater is programmed using a PC There are 8 possible channels we set up 4 Set RX and TX frequencies

lawson
Download Presentation

THE K5RWK REPEATER

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. THE K5RWK REPEATER HOW IT WORKS By F Cummings, W5LQU August 2009

  2. OUR REPEATER BLOCK DIAGRAM

  3. THE PRESENT RWK REPEATER

  4. BACK OF OUR REPEATER

  5. THE REPEATER

  6. INSIDE THE REPEATER

  7. The repeater is programmed using a PC • There are 8 possible channels we set up 4 • Set RX and TX frequencies • Set timers for hang time and time out • Set TX power out and RX squelch • Set CTCSS tones if needed for TX and RX PROGRAMMING THE REPEATER

  8. PROGRAMMIMG THE REPEATER

  9. THE CONTROLLER

  10. THE CONTROLLER CIRCUIT BOARD

  11. The controller is programmed using DTMF tones through the RX • Set various control operator functions • Set the normal voice ID and CW ID • Set timers for hang time and time out • Set the time out message • Set the courtesy tones PROGRAMMING THE CONTROLLER

  12. TROUBLE SHOOTING

  13. A DB224 antenna with 4 vertically stacked folded dipoles which can be connected to form an omni or eliptical pattern with about 6 to 8 dB gain 2M DB224ANTENNA

  14. OUR PRESENT ANTENNA

  15. OUR NEW LOCATION

  16. VIEW FROM THE NEW SITE

  17. LIGHTNING PROTECTION and 2m / 440 DUPLEXER

  18. Connecting the TX / RX to the same antenna at the same time • 2m / 440 dual band radios • Collinear verticals • Delta of 147.72/147.12 = 0.4 % • Need a very special Duplexer for 2m repeaters • Combination bandpass/bandreject circuit • Requires very high Q circuits THE BIG PROBLEM

  19. BP/BR vs LP/HP • 6 quarter wave cavities – 3 TX and 3 RX • 1 BP and two BP/notch cavities each • RX bandpass 147.72 and notch 147.12 MHz • TX bandpass 147.12 and notch 147.72 MHz • About 95 dB isolation from BP to notch each RWK DUPLEXER

  20. DUPLEXER RESPONSE CURVES

  21. Tx

  22. AD5VO TUNING THE DUPLEXER

  23. RWK 6 CAVITY DUPLEXER

  24. THE K5RWK REPEATER

More Related