Thursday, November 19, 2009

Lifetime Memberships

At the November meeting John Wolfe W0LFE and Dale Johnson WB9NRK were unanimously voted as lifetime members of the Green Bay Mike and Key Club.

Tuesday, October 6, 2009

Wisconsin Interstate Network Repeater online in Green Bay

This is a new repeater in town: 443.400 PL 100 Repeater in GB - Echolink node 18006 The Wisconsin Interstate Network consists of the following repeaters:

* 442.100 Rice Lake
* 442.200 Wausau
* 442.300 Janesville
* 442.400 Fond du Lac
* 442.500 La Crosse
* 442.700 Richland Center
* 442.725 Coloma/Hancock
* 442.800 Eau Claire
* 442.075 Minneapolis,MN
* 441.400 Madison
* 443.025 River Falls
* 443.400 Green Bay
* 443.550 Black River Falls
* 443.900 Baraboo
* 444.400 Sayner/Minoqua
* 444.550 Hollandale
* 444.800 Tomah
* 440.150 Watertown

Here's a link to the website: Wisconsin Interstate Network. If you click on "Repeater Guide" at the top, you'll see what a large system this is.

Thursday, July 16, 2009

Update on the new repeater and controller for 147.360+ PL 100 at Bellin Hospital

The Bellin repeater is now up to specs and fully functional as of 9:30PM July 10th thanks to KB9UAE and KB9MWR. Steve and Nick put in 12+ hours testing, re-programming and checking out every aspect of the installation including making up new cables for the duplexer which was still perfectly tuned after many years at the college! They also installed a common grounding strap between the power supply, duplexer and repeater. The controller is now indentifying with the proper ID. The power is approximately 40 watts ERP at the antenna.

Next, venting holes need to be drilled in the cabinets for the repeater to improve dissipation of heat. We can begin to develop a 360 degree range pattern for this site over time.

Saturday, July 11, 2009

Hysteresis

Regarding the 147.360 squelch... It has been re-calibrated. But here is a little nugget for those curious:

Most FM squelch circuits incorporate a feature called hysteresis, which is a deliberate change in sensitivity between squelch-closed state and squelch-open state. If you design the circuit so that it is more sensitive after opening than before it functions much better in the real world. Without hysteresis, the squelch may drop out while someone is talking. If there is too much hysteresis, squelch threshold becomes hard to adjust properly.

Motorola coined this dynamic relation as "smart squelch", which I think sticks with people. The gist of it is as you get noisy due to mobile flutter or what have you, the squelch loosens, to help cut down on picket fencing.

A good example of a radio with no hysteresis is the Icom 706. If you have ever use this for FM mobile you know how annoying a lack of hysteresis is.

Hysteresis actually helps the weak signal performance, because it decreases threshold once the squelch pops open. Imagine how choppy every mobile users would sound if a repeater had no hysteresis. You want the carrier to reach a point that the noise level is driven below the critical point and hold the repeater COS open.


Steve, KB9MWR
http://kb9mwr.blogspot.com

Sunday, June 28, 2009

Amateur radio users gather for celebration



HAM radio field day in Ashwaubenon (2009) - K9EAM

ASHWAUBENON — Thousands of amateur radio operators this weekend are demonstrating their abilities to provide emergency communications in the event of a crisis.

The annual nationwide Field Day aims to promote HAM radio and help people understand how to create their own amateur broadcasts.

The Green Bay Mike and Key Club organized a demonstration for the public on the use of amateur radio Saturday afternoon at Ashwaubomay Park.

Some relief organizations and government agencies rely on ham radio to broadcast emergency communications to the public in the event of failing phone systems, Internet or other modern communications. There are around 660,000 amateur radio enthusiasts in the United States, according to the National Association for Amateur Radio.

As covered by the Green Bay Press Gazette, a local newspaper.

Thursday, January 22, 2009

2009 Officers

President: Dutch, WB9YWQ
Vice-president: Dale, WB9NRK
Treasurer: John, W0LFE
Secretary: Ron, KB9KIX
Members at large: Ron, KB9KIX & Keith, KS9WI
Newsletter: Joe, N9UPU and Jackson, KC9KVU