144.250 Repeater Status - 1 November 2014 - Down for reconfiguration

[Luke Jenkins]

We've borrowed a very nice Motorola communication analyzer, and I think we've got just about all of the ducks in a row to install the re-tuned/possibly expanded cavity system as well as swapping out the radios for a pair of Motorola Spectras.

The last item missing before we can start testing is a wiring harness for the repeater controller. I stopped by and picked up the repeater controller so I could work on it this weekend.

[John Metcalf]

There should be some spare db9 connectors in the parts drawers in the shack.

Sent from my iPhone

On Nov 1, 2014, at 18:31, Luke Jenkins <luke...@gmail.com> wrote:

We've borrowed a very nice Motorola communication analyzer, and I think we've got just about all of the ducks in a row to install the re-tuned/possibly expanded cavity system as well as swapping out the radios for a pair of Motorola Spectras.

The last item missing before we can start testing is a wiring harness for the repeater controller. I stopped by and picked up the repeater controller so I could work on it this weekend.

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[Luke Jenkins]

Little bit of a snag today. The Spectra that I was going to use for the RX radio doesn't seem to care about PL tones. After doing some research and seeing that it is just something some of them have issue with, I swapped in the other 40w VHF Spectra I had on hand. It was much happier waiting for a tone before breaking squelch, but I hadn't recapped it yet. I'm getting good at this fix, but it still takes me a couple of hours to remove, clean, and replace 10 surface mount caps across 3 boards so Sunday was mostly shot on this task.

Still on the to-do list:

• Double check config and calibration on TX and RX radios
• Create wiring harness (male DB-9 on controller side, male DB-25 on the radio sides)
• Re-program controller
• Configure, test, and optimize a cavity system

Getting the voice repeater back on the air will bump the APRS I-Gate back down to RX only status until we get a second antenna up on the tower. It would be nice to get it mounted before things get cold, but we could always hold off until Spring if we need to.

-Luke

On Saturday, November 1, 2014 6:35:56 PM UTC-6, John Metcalf wrote:

There should be some spare db9 connectors in the parts drawers in the shack.

Sent from my iPhone

On Nov 1, 2014, at 18:31, Luke Jenkins <> wrote:

We've borrowed a very nice Motorola communication analyzer, and I think we've got just about all of the ducks in a row to install the re-tuned/possibly expanded cavity system as well as swapping out the radios for a pair of Motorola Spectras.

The last item missing before we can start testing is a wiring harness for the repeater controller. I stopped by and picked up the repeater controller so I could work on it this weekend.

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[John Sohl]

I have a few DB-9 and DB-25 connectors and hoods available if you need them. I would need to check the genders, but I think we are probably good. 

What type of antenna do we need? 

Sohl 

- - - -

John E. Sohl, Ph.D.
Professor of Physics
Weber State University

1415 Edvalson St., Dept 2508

Ogden, UT 84408-2508

voice: (801) 626-7907, fax: (801) 626-7445

cell: (801) 476-0589

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[Luke Jenkins]

I included a dozen of each type and gender on my last mouser order, so I think we're set there.

http://www.diamondantenna.net/x50na.html was the shortest single piece dual band base station antenna I could find with an N-connector. They are very reasonably priced so I've got one on the way. I'm sure I could find another use for it if anyone has a better choice of a very durable antenna to mount 10' or so below the current antenna.

-Luke

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Luke Jenkins
Network Engineer
Weber State University

[John Sohl]

Excellent. Great work. 

Sohl 

- - - -

John E. Sohl, Ph.D.
Professor of Physics
Weber State University

1415 Edvalson St., Dept 2508

Ogden, UT 84408-2508

voice: (801) 626-7907, fax: (801) 626-7445

cell: (801) 476-0589

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[Luke Jenkins]

Now one area that I haven't quite figured out is mounting hardware. To minimize coupling both between antennas as well as the tower, we need to get ~1/4 wavelength offset from the tower and as separated as we can without having the lower antenna be to far into the scrub oak.

KE7VVT has offered to get out his welder and build us some stand-offs, but that is about as far as we've gotten. Anyone with a mechanical mind want to take on this challenge?

-Luke 

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