Club meeting September 15.

If you’re not going to the ARRL Digital Communications Conference in Albuquerque, come out to the US Bank building in Glenwood Springs to see Bob Cutter’s (KI0G) demonstration of the “OG” digital mode, an antique spark gap transmitter.
From Wikipedia: Spark gap transmitters were the first devices to demonstrate practical radio transmission, and were the standard technology for the first three decades of radio (1887–1916). Later, more efficient transmitters were developed based on rotary machines like the high-speed Alexanderson alternators and the static Poulsen arc generators.[1]


Most operators, however, still preferred spark transmitters because of their uncomplicated design and because the carrier wave (carrier) stopped when the telegraph key was released, which let the operator “listen through” for a reply. With other types of transmitter, the carrier could not be controlled so easily, and they required elaborate measures to modulate the carrier and to prevent transmitter leakage from de-sensitizing the receiver.

 
Meeting starts at 10:00, runs until about noon or a little after. VE testing, show and tell, and general topics of interest to the club are invited.
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OpenSpot-1

February 4 2017 Meeting Video

Ken, KB0HP gives an excellent talk and live demo of JT-65 weak signal mode and Bob K9MWM has a report from his and Sue’s (N0DBY) trip to Quartzite RV meeting and hamfest. As usual, sorry about the production quality, but I think I’m getting better at the one-man-band production system. This month I ditched Switcher Studio and tried out Rico Live multicam, which doesn’t do realtime streaming (which didn’t work all that well and gobbled up data), but does record all footage locally and render it later, which I think does a much nicer job.

Anvil Work Day Postponed!

Though the forecast for tomorrow (Sunday) doesn’t look too bad, we’d be lucky to get 3 hours on site.  Also the last couple of days of rain is likely to have made the road slimy & very muddy, with little chance for it to dry out before the morning. (More rain forecast through 7 PM this evening).

So, we will postpone the work day until Sunday September 11th.   Same plan meet at City Market in Rifle at 8AM.  (I’m out of town the next 3 weekends).   September is typically a bit drier so hopefully we’ll have a larger window.

Thanks     Chuck n0nhj

Anvil Points Site NWS Forecast

Cell that rolled over Anvil an hour or two ago

Satellite

Work Days – Sunlight & Anvil

All plans are weather dependent!!   Keep an ear on the repeater for last minute changes.  I’ll also try to post any changes here if time allows.

Tuesday, August 2nd – after breakfast the VI.  We will leave the Village Inn in Glenwood Springs for Sunlight Peak about 9:15 AM.   Early forecast calls for the possibility of showers in the afternoon, so it will probably be a 1/2 day, but it never hurts to pack lunch.

I hope to tackle some tower work to better secure the antenna feed lines.   Depending on the time available we may also swap out the UHF Hub repeater (447.6 MHz) with the new (to us) Motorola MTR2000 repeater, this will increase our transmit power and should have slightly better receive sensitivity.

Other general labor projects to be accomplished include some weed pulling/trimming around the building.    We’ll plan to be headed down by 2PM if the storms don’t arrive earlier.

Anvil

Sunday, August 7th – Anvil Points.  We will meet at City Market in Rifle at 8AM.  It’s 25 miles each way to the site via the JQS trail, and will take us about 90 minutes.   The road is in good shape as of yesterday (7/28), but is narrow in places. (My jeep liberty does fine, a full size vehicle will make it, but the pucker factor will be higher).  The last 150 meters is through the sage brush, and there is limited parking on top, so some folks should expect to hike the last section.    We will try to get as much time on site as weather allows, so pack a lunch.

The major project will be to dig and install mounting poles for our new solar panels.   Bring your post hole digger, and spade shovels.     Other projects that would be nice to accomplish:  Clearing/trimming the brush along that last section of ‘road’, clearing some down trees on the main road.  We’ve got some tower work to do, removing some old antennas and feedlines, installing a new antenna, and feedline for the UHF link.    There is also general cleanup and weed removal that needs to be done.   If you’ve got tools that would be helpful for any of these projects please bring them along.

Any questions, offers or suggestions please contact  Chuck  n0nhj  email is my call sign at yahoo.com or 970 930 1296.

Thanks    Chuck  – n0nhj

Fox Hunt Tools

Couple of folks were asking about the variable attenuator I was using at the Picnic Saturday.   Here’s the link to the Offset Fox Hunt Attenuator on the Arrow Antennas page.  http://www.arrowantennas.com/main/4ofha.html

Thanks Pat for hosting another great Picnic, and thanks to Brent for providing and hiding the fox!

Chuck   n0nhj