Rocky Mountain Ham & Ski Country ARC

by Rocky Mountain Ham – RMHAM.org and KD0MA, K0JEG & N0ECT

3 New RMHAM Linked Sites – Installed in one day, including the updated Colorado Connection.

A crack team of 15 RMHAM team members pulled off another 3 site day interconnecting the RMHAM (front-range) network to Leadville and Vail. This push gets DMR into these areas that have not been covered with DMR until now. We (RMHAM) now cover I-70 nearly contiguously from Genoa through Avon. We installed two, new (digital) microwave hops from our Fairplay site to our Leadville and then over to Vail (Dowd Junction) with three dedicated teams. By noon on September 30, 2017, the DMR and Analog FM system were in place and ready to carry digitized voice traffic – simultaneously over the new Digital Mountain Top Microwave Network.https://i2.wp.com/www.rmham.org/wordpress/wp-content/uploads/2017/10/2017-09-30-Mosquito-Pass-77.jpg

Colorado Connection – Vail – Dowd Junction Repeater – FM Analog  147.345 (+) PL 88.5

DMR – Vail Dowd Junction Repeater – 445.07500 (-) Color Code 7, Time Slot 1 – connects you to RMHAM Front Range Talk Group 700

DMR – Vail Dowd Junction Repeater – 445.07500 (-) Color Code 7 Time Slot 2 – connects you to RMHAM Front Range Talk Group 720

We also added new digital linking for the Colorado Connection and upgraded both the Leadville and Vail (CC) repeaters to new digital hardware! The Colorado Connection still supports FM/Analog Radios, however the new Mountain Top Microwave Linking System – digitizes that FM Analog Voice traffic into TCP/IP – VoIP packets.  This new Digital Microwave Mountain Top Linking ELIMINATES the old Analog FM Link Radio System problems that has plagued SCARC Repeater Backbone for months!https://i2.wp.com/www.rmham.org/wordpress/wp-content/uploads/2017/10/2017-09-30-Mosquito-Pass-40.jpg

Folks from Ski Country ARC from the Vail area assisted the Vail RMHAM team in completing this task. Fairplay team of K0JSC, N2MED, K0GUR got the microwave in and peaked. Leadville team of W0VG, AC0KQ, AE5IT, N0DEV, K0IBM, K7AIH. Vail team was K2AD, WA1JHK, KI0KN, N7CTM with prework by W0KU. Ski Country folks that helped out KD0MA, K0JEG and N0ECT. They installed microwave, power, routers, and all assorted cabling along with doing lots of antenna rework to handle the new configuration.IMG_2436

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ARRL Field Day 2017 – K0RV Style!

The QSO + Fun Factor exceeded last Years effort – if you ask N0ECT!  Some of our favorite Field Day Photos and captions from this (June 24-25) weekend’s 24 Hours of Operating HF using Emergency Power only.

ARRL-FIELD-DAY-2017-Chase-BrentIron Chicken Chef N0AFO…demonstrates to Debbie N0LDB the Art of Grilling Chicken – with his Eyes Closed!So-Easy-I-Can-Grill-Chicken-With-My-Eyes-ClosedK0RV’s most Experienced Drone Pilot – Eric K0JEG.  Armed with his 4K HD Drone Camera and GPS Drone Technology – Eric’s Drone located the MOST COMFORTABLE chair at Field Day and K0JEG and took full advantage after an exhausting day of QSO’s and Flying High!Drone-Master-K0JEG-Best-Seat-In-the-HouseK0RV’s t-Shirt Design Team Phil N0KE and Ms. Betty KD0YDH are busy working on next years Field Day 2018 t-Shirt.ARRL-FIELD-DAY-2017-N0KE-KD0YDHN0ECT is still insisting he found one of these Signs…On N0AFO’s Beer Cooler that Saturday Afternoon!Free-StuffBob KI0G Cutter ran the (GOTA – Get On The Air) Station this year.  Being a former Judge – KI0G must be use to handing out cruel and unusual punishment!  How So?Well…Bob ran the GOTA Station at QRP (5 Watts) – Yikes!  Bob is still trying to explain how to beat an HF Pile Up on Field Day using only 5 Watts…leveraging what looked like Kite String for an Antenna!  At QRP – N0ECT rechristened KI0G’s GOTA Station as the “Waiting for Godot” QSO Station!   Extreme QSO Patience paid off…Occasionally, the GOTA Station confirmed a few 40 meter QRP QSO’s!  Their GOTA Station Blew the Horn targeting their skeptics…for every completed QSO!Always-Running-On-Low-Lower-KI0G-QRP-ManWell if you don’t know what “Frequency Feast” looks like – you do NOW!Field-Day-Feist-K0RV-25JUN2017

Field Day 2017 – ARRL & SCARC

by  N0ECT

Setup for Field Day 2017 starts at 3PM, Friday, June 23rd at our Field Day QTH.  At 6PM Friday nite is the drawing for ARRL Field Day Souvenirs for those helping with Setup.image

Field Day officially starts at Noon (Mountain Daylight Time) on Saturday, June 24th and continues till Noon on Sunday, June 25th.  Sign up Times for operating on HF during the 24 hours of Field Day will be available – starting 3PM Friday.

For more information and a Map to our Field Day Site – (Missouri Heights near Carbondale, Colorado (Click Here)

For all ARRL Field Day Sites & Locations – just CLICK ON the Map below.image

Digital Radio & What’s New from Dayton

The Days of the Digital Radio “Tower of Babel” are coming to an end.

The different Digital Modes promoted by different Radio Vendors are starting to “Converge” via new Digital HUBS and Digital Servers.

Result?  DSTAR folks can talk to C4FM/Yaesu using their native vendor specific Radio, DMR Radios interoperate here too.  The ever popular Digital HT – the MD380 was selling for $75.00ea at Dayton.  Digital Mobile interoperability is improving too because of the availability of WiFi while Mobile due to today’s SmartPhones.

Below is a great summary – of what’s going on in the Digital Radio World – from Dayton last week.

http://www.k6jm.com/wp/dayton-2017-d-star-and-digital-voice/

 

 

Building My Raspberry Pi-3 Portable AllStar Node – for your Car or RV

by  N0AFO

A Portable Allstar Node – means never having to be near a Repeater to use it.  Allstar uses the Internet – to connect to a distant Allstar Node – that is connected to the Repeater System you’re trying to reach.  Portable Allstar means you use a WiFi Hotspot in your Car or RV that provides the WiFi connection for your Raspberry Pi 3 computer – that runs the (free) Allstar software.

I have wanted to build a portable (FM) Allstar node to take on the road with my RV forAllStar-Raspberry Pi-3 several years now. The effort started first with IRLP but never progressed to the finish line because IRLP has a need to do IP port forwarding (from the WiFi Hotspot) of several UDP ports to the IRLP interface board in order for it to function. In the 3G wireless (Hotspot) world that was not difficult to do since wireless providers (usually) handed out publicly routable IP addresses to each wireless 3G hotspot. You were then able to port forward from a Hotspot router that is the wireless hotspot.

Interface-Card

Those days are gone, todays wireless 4G networks no longer give subscriber’s devices publicly routable IP addresses. The only solution for operating portable IRLP on 4G wireless networks has been to use a VPN client service to forward the required ports. To do that requires a fair amount of effort setting up and maintaining a VPN client on the (likely – Raspberry Pi) computer running the IRLP software. Other hams have successfully done this but it requires a more in depth knowledge of Linux than I presently have. You also need a source for VPN services. (money $$) My efforts with portable IRLP stalled at this hurdle. Easier tasks caught my attention and I did not progress beyond setting up an IRLP node at my home. It has operated flawlessly, a tribute to the Linux operating system, for many years.

Thanks to the efforts my good friend Pete, N0ECT, I was recently prodded to reexamine the possibilities of a Portable Raspberry Pi 3 – AllStar Node. AllStar, has been around about as long IRLP but developed more slowly. In its original incarnations it was more (Linux) complex to setup than IRLP. Like IRLP it runs on computers running Linux along with a version of Asterik modified for amateur radio use. Much about AllStar has changed since my last look at this package. Today’s computers are smaller, more powerful, and cheaper. Memory is denser and also cheap. Handheld FM ham radios (SDR) can be purchased today for $13.00. One of the most popular implementations of AllStar today runs on a fast Raspberry Pi 3, using a micro SD card as its hard drive. The Pi 3 computer includes WiFi to connect to your portable Internet Hotspot. The setup process is mostly scripted for you using a Browser based GUI interface. Maintenance chores are all accomplished using the same Browser from your PC or Mac. You no longer have to keep a version of Linux For Dummies at your side as you configure your system. Little, if any, Linux interaction is required to get the system up and going. Compared to IRLP It’s easier to set up, cheaper to build, and the voice quality is superior. After gathering all the parts and pieces, we had AllStar up and going in no time.

During the process of setting up my home based Raspberry Pi AllStar node my thoughts returned to building a portable node. I wondered if I would face the same challenges that thwarted my attempts of making a portable node work under IRLP. The setup instructions for AllStar still made reference to setting up port forwarding from the router firewall/Hotspot, and that seemed like bad news. I searched the web to see if anyone had accomplished this feat yet in an AllStar environment. I did not find a lot, but then IMag-Pi-Case stumbled across a posting from a ham in Philadelphia, that gave some hope. He pointed out that while an Allstar node needs a port forwarded from your router, that port is only used to facilitate other hams connecting inbound to your node! Eureka! It is not required for you to initiate an outbound connection to another Allstar Node or Allstar SERVER/HUB! To me, that meant if you want to operate portable from your car or RV you can initiate Allstar connections to other nodes and hubs all day long without needing a VPN Client to forward your connection request. I called my friend Pete and we tested this point, shutting down port 4969 on his node. It worked! While I could no longer connect to Pete’s node he could add Outbond connections to his. The biggest connection problem with portable IRLP, does not exist with AllStar. My biggest impediment to operating from the RV is not a factor in AllStar. It’s G. O. N. E. Thank you AllStar.

Allstar is different from IRLP in another useful way. In the IRLP environment you can only connect to one node at a time. So if you are talking to an individual IRLP node no one else can join the conversation. You can connect to a special node called a reflector that does accept many simultaneous connections, but you can only have one connection at a time. In the Allstar environment a node can connect to multiple other nodes at once. And, (here is where it gets a bit confusing) those nodes can also be connected to multiple other nodes. That can quickly make for some pretty big networks. These are literally star networks connected to other star networks. The star,in AllStar.

So back to my RV node operation, If I, while I’m on the road, I maintain a connection to my home AllStar node, then I will also be connected to whatever nodes connected to my home. Since my home node has port 4969 forwarded to the Raspberry Pi, from my firewall, other nodes can connect to it and in turn, my mobile node will also be connected to them. Inbound connections to me when I’m mobile will not be a problem because of this feature. Callers will think they are connecting to my home node but, no matter, I’ll hear their call because I too am also connected my home node. AllStar call forwarding! Plus, if I choose, I can still connect to other nodes at the same time. In essence I can have all the benefits of a full featured mobile AllStar node without needing to do VPN port forwarding while I’m mobile.

Another nice Allstar feature is that I can manage my home node or, any node, using the proper node password from a Browser. This is accomplished using new browser tool, Supermon. Users can manage connections, adjust audio levels, even reboot the Raspberry pi if needed, all remotely from an iPhone or other internet connected device.

I’ll be talk’n to ya all from the road this summer, I’m a happy camper now! 73, N0AFO

Resources:

https://allstarlink.org/

https://hamvoip.org/

http://www.crompton.com/hamradio/BeagleBoneBlackAllstar/

(16GB – Micro-USB – Click Here) Purchase at least two, one for operating the Raspberry Pi 3 and one for node backup. Be sure they are class 10 speed rated.

Except where otherwise noted all parts were sourced from Amazon.com

USB Radio Interface Card $50.00

Source: http://www.repeater-builder.com/products/usb-rim-lite.htm

You can make your own interface card ( instructions can be found at https://www.hamvoip.org/ )

I decided to spend the $50.00 for the repeater-builder package. It was a time saver, it is the most expensive item in my project.

If you want to roll your own radio sound card interface this is the device you need . The project involves disassembly of the package along with some precise soldering techniques on a surface mount board. This card is responsible for supplying the PPT, COS, Tx audio, and Rx audio to your radio.

My Node’s Parts and Pieces (Shopping List – Click Here)

https://www.modmypi.com/raspberry-pi/cases/modmypi-rpi-a-plus-b-plus-2-and-3-

US $7.40

This case ships from the UK and takes about 10 to 15 days to arrive. This is my favorite Raspberry Pi project case. It has some ventilation slots built in which I think is a good thing. Best of all you can purchase spacers to increase the height of the case to accommodate add on boards. I also recommend purchasing the SD card cover it will protect the SD card from falling out. If needed, two covers for the USB and HDMI ports will help keep dust out if you are using this in a dusty environment.

Using stacking spacers, I was able to stuff a Raspberry Pi based IRLP node into a single case, accommodating the Raspberry Pi, IRLP interface board, and audio sound card inside one small case. It’s worth waiting for. I have not found a US source for this item.

Finished Pi 3 Package

My finished Allstar node. Initially I plugged the USB radio interface card into one of the USB slots on the Pi board which required routing the USB connector to the outside of the case. I found that the plug was sub-ject to intermittent connections as it was bumped. That would not be optimal for my planned use as a portable AllStar node for my RV. The solution was to hardwire the USB cord to the Raspberry Pi board. This still allows for unplugging the cord from the radio USB interface card. I have not had any more connection issues since doing this modification. I placed some electrical tape over the external USB port that I hard wired to preclude inadvertently plugging another USB device into that port. In the top photo the Pi is running off of a battery designed to charge cellphones. It ran the node for three days off of this battery.

Light pipe feature of the Mag Pi case

USB Radio Interface

USB cable routed to USB port on case exterior.

12 Volt to 5 volt Power Supply

For Raspberry Pi

Portable operation

I found this 3 amp 12 volt dc to 5volt dc down converter with a micro fe-male usb connector to power the Raspberry Pi3 . This makes for a very small and neat package that can easily be tucked away out of. The power drain of the Raspberry Pi and the radio USB interface is under 1.5 amp.

Parts for the Mobile AllStar UHF Node Radio

This is a work in progress . I’m presently using a modified Motorola Maxtrac mobile radio as my home node AllStar radio. This radio was a conversion done by KE0TY , now a SK. Ted removed the final power transistor leaving the radio to use the driver transistor only. About the same power as the BF888s. This allows operating the radio at 100% duty cycle. That radio consumes more power and space than I want so I explored some alternatives. Initially I thought about converting a Baofeng UV-5R to be the Mo-bile node radio since I had one on hand. The parts density of the UV5R is high and things like the DTMF key pad and the display add to the complexity. I decided not to go down that route and reassembled the UV5R before I could break it. After some re-search I ordered a Baofeng BF-888s to be my new Allstar node radio in the RV.

This Radio is cheap, and not difficult to interface to the AllStar Pi . ( a link to the instructions is below ) It has 16 programmable channels. I programed them all to the same frequency so the radio will always be on the frequency that I want it to be on. The BF-888 radio (photo below) will be dedicated just to mobile AllStar. The low power drain of the BF-888s and the Raspberry Pi will allow it to be on 100% of the time. Node DTMF commands will be sent from the handheld or mobile radios that are transmitting to the BF-888s. Based on my experience from my home node the radio’s range should be about 6 miles when using an external 5/8 UHF antenna. If I just use the supplied rubber duck , it is a mile or so. BF-888

To keep the power supply side of the equation simple I purchased the BF-888s battery eliminator. It clips onto the back of the BF888s reducing 12 Volts to the 4 volts required to run the radio. That will be connected into my RIGrunner power buss in the RV. The RIGrunner supplies all my radio gear with DC power via power pole connectors each fused separately. It in turn is sup-plied power from a dedicated deep cycle marine battery that is separate from the rest of the RV batteries. This dedicated battery is automatically charged from any of four sources. The generator, the house solar panels, the RV’s house battery charger if the RV is plugged in to shore power, or the engine alternator when underway. Draining the dedicated radio battery does not affect the other RV batteries. It will charge from, but it can not drain the RV house or chassis batteries.

The BF888s modification details are found here: http://crompton.com/hamradio/baofeng888/

Baofeng Babe!

by  KG5KKX

Unmistakable.  Boafeng’s UV-5R finally made it to the front cover of this months QST – March 2017.  Operator: Chase KG5KKX.  Folks that are not afraid of Facebook, also know that Chase is a freshman at U of Texas – Austin.  She likes Skydiving and Riding Horses in Rodeos.  But don’t get too excited guys – it’s gonna’ be about another (3) years before you can legally offer to buy young Chase a drink!Gal-with-a-Baofeng

So the next time somebody suggests Amateur Radio is just a bunch of old guys talking…you call tell ‘em about this Longhorn freshman!  73s

Young Bachelor members of SCARC now have a choice – you can chase DX – or you can chase (CHASE – KG5XXX) perhaps even on Digital!  Below from Chase’s Facebook page.

Chase-Mertz

Vanity Time – Tags for you and your Vehicle

Special Thanks to SCARC Vice President – Dave KD0WQC for keeping us all organized and identified.  Dave has worked out an arrangement with Micro Plastics, Inc. of Glenwood Springs, CO.

Dave’s Details: The cost of each name tag with a magnetic backing is $9.98 plus tax. The cost of each name tag with a pin back is $8.59.  The name tag is made with hardboard. You can reduce the price if you remove your QTH.

clip_image002

I forgot to tell them we wanted a slash through the zero but you can tell them if you order one.  I paid the setup fee so you wouldn’t have to. The addresses are as follows Micro Plastics, Inc.  531 Railroad Ave. in Rifle and 407 24th St., in Glenwood Springs.  (recent change) Please EMail instead of Calling on Phone!  sarahl@mpsigns—dot—-com 
I tried to make it easy to get name tags here locally. They told me you can more information to customize your tag but the price will increase.clip_image002[5]

Now that we have YOU – ID’d…What about your Colorado Vehicle?  OK, you can apply for a Colorado Vanity License Plate Tag if you (Click Here).  Last time N0ECT checked it cost $1.00 for the front and $1.00 for the back license plate for your Colorado Vehicle.  The State sends you a $2.00 Bill (after you apply – see form above) after that – they send you your new Vehicle Tags…figure 4-6 weeks depending on how busy Colorado Convicted Felons are.

Smilin’ Ken  KB0HP – Says – “Earn your Ham Radio TECH License the easy Way!”

https://k0rv.files.wordpress.com/2016/11/kb0hp.png?w=332&h=309

HAM RADIO -TWO-DAY- TECH LICENSE CLASS – RIFLE, Colorado
Free Training! – Only costs are textbook & test fee
RIFLE, COLORADO
SATURDAY, FEBRUARY 25TH  & SATURDAY, MARCH 4TH, 2017

(you will test for your HAM license on the 4th!)
RIFLE PUBLIC LIBRARY – 207 EAST AVE
LARGE COMMUNITY ROOM UPSTAIRS
8:00 AM – 5:00 PM
INSTRUCTORS: KEN RAHN KBØHP, JIM LEGG ADØLI, DAVE RAHN KDØWQC, CLARK HECKERT K3NI, AND KEN WHITE KØWJR

SPONSORED BY SKI COUNTRY AMATEUR RADIO CLUB
Required Text: 2014-2018 Technician Class by Gordon West—Please order from Ken Rahn to receive discount price (see contact information below)

Important!
 Please complete the provided Pre-Study Q & A homework at home before coming to class. Without the home study, the class probably won’t be a success.
 Remember to bring picture ID and $15 for taking the Tech Exam on March 4th.
 Questions?  You may contact Ken at 970-625-0745 or 970-379-3427 or via

EMAIL:    KB0HP -AT- YAHOO  DOT-COM
See you there!

Digital in Dayton – 2016

by  K0JEG and N0ECT

There can be little doubt that Digital Radios will be a big part of Amateur Radio in the years to come.  Here is some new information on some of the Digital Radios discovered at Dayton this 2016.  Hold on to your Wallets…these new Digital Models don’t say BaoFeng on the front…(well, at least not yet)

Introducing the DV4mobile – can’t buy it yet, however can “Reserve” one for $35.00 deposit today.  Expected delivery?  Oct-Dec 2016….Cost guesstimate $900-$1,200 each.

Here is N0ECT’s online Chat with GigaParts about this new DV4Mobile.

New Picture (2)

New Picture (1)

N0ECT Comment:  Not sure how programming this Radio with LTE is going to work.  My iPhone (like yours) is programmed via the USB/Lightning connector -or- via WiFi in my office with iTunes running on the PC…New Picture (1)

Kenwood’s new Tri-Band – Digital Handheld – “Coming Soon”

(APRS, D-Star, Color TFT Display, GPS/Bluethooth, microSD, Micro-USB connector)

Parts List for Raspberry Pi Bootcamp

by  Eric K0JEG

We’re still planning the agenda for the Raspberry Pi bootcamp, but I have a plan for the class room build phase. I think a good project will be to build an Aircraft ADSB receiver, using a USB tuner and GNU (SDR) radio. This ADSB Radio Receiver (combined kit) can then be used to upload ADSB Real-Time digital flight data to FlightAware.com or just used as a launching pad for more SDR projects.  (below an example)Eric-ADSB

We were aiming for sometime in May, but it turns out May is a very busy month. Must have something to do with pent-up demand from winter… Anyway, we’re now looking at June 4th for the date. Ken White, KD0YDH has permission for us to use his WiFi classroom at Rifle High School. Thanks Ken for doing the legwork! (Update: 30APR2016 – note date may change)

The project will require a Raspberry Pi 2 or (preferred) Pi 3. The Pi 3 is shipping in quantity so it should be fairly easy to pick one up, although you might pay a little more than the $35 target price. The Pi 2 is more than powerful enough though, so don’t worry if you can’t get a Pi 3.  Pi3 advantage?  WiFi (and Bluetooth) built right into the tiny motherboard.  Pi2 has to add WiFi externally via one of its USB ports.

http://www.amazon.com/dp/B00T2U7R7I  – Link to the Pi 2

http://www.amazon.com/Rasberry-Pi-Model-Mother-board/dp/B01CD5VC92/ – Pi 3

For the Price of (2) Baofeng’s you can get a complete Pi3 – Kit (case, micro-SD hard drive and Power Adaptor and HDMI cable $69.99

http://www.amazon.com/Vilros-Raspberry-Complete-Starter-Kit-Clear/dp/B00L87YMGM?ie=UTF8&psc=1&redirect=true&ref_=oh_aui_detailpage_o03_s01

http://www.amazon.com/Wifi-Antenna-Raspberry-Pi-Instructions/dp/B00H95C0A2 – good WiFi/USB adapter for the Pi 2. Has a removable (SMA-RP) antenna connector

http://www.amazon.com/dp/B00MARDJZ4 – Micro-USB power supply, 2.5 Amps, more than enough to power the Pi and a few USB devices. You can use a minimum of 1A phone charger, but if you’re going to do anything permanent it’s a good idea to pick up a good power supply.

http://www.amazon.com/dp/B00JRSPSZI/ – Micro-SD card.  This acts as the Pi Computers (hard drive). The Pi 2 and 3 switched to micro-SD cards and a much more stable card reader. 16 GB is the minimum I’d get, 32 GB is better. Get a higher-class (read: faster disk drive) micro-SD card so that it doesn’t become a bottleneck.

http://www.amazon.com/NooElec-NESDR-Mini-RTL2832-Antenna/dp/B00P2UOU72 – USB-SDR module (photo). There are others that are a little less expensive, but theRTL-Dongle manufacturer of this model claims they use a more stable TXCO circuit, which means lower phase noise and more precise frequency control. Your mileage may vary… Just make sure whatever model you buy is based on the RTL2832 chip.

You’ll also need a keyboard, mouse and HDMI monitor.

Check out this amazing list of the number of USB-SDR Receiver projects this NooElec $22.50ea adaptor is capable of…and the list is GROWING!  (Click Here)

You can’t beat this $23.99 Logitech Wireless Mouse and Keyboard (uses just 1 USB tiny connector)  Logitech even includes the batteries for the Mouse and Keyboard.

http://www.amazon.com/Logitech-Wireless-Combo-MK270-Keyboard/dp/B00BP5KOPA?ie=UTF8&psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00

Once you get your Pi working you’ll be able to access it remotely on your home network.  We can show you how to download the (free) Remote Desktop App for the Pi – that allows your home PC to “Remote Desktop” to the Pi for complete control.  But for the class we’re going to be connected directly. A case would be a good addition too, especially if you plan on using the Pi permanently. There are lots available, at lots of different price points. You don’t really need to worry too much about heat dissipation unless you are going to overclock your Pi, which won’t be necessary for the class (but I will go over the process).

Anyway, we have 13 people who signed up during last months’ meeting. I’ll also have a sign-up sheet at the foxhunt in May or just drop me an email if you plan on attending.