Inductor Rules of Thumb

Sevick’s books on inductors are widely regarded as the canonical works on inductors. I’m looking for a more intuitive understanding and not so much math. Here are some rules of thumb for inductors. Not everything here is necessarily 100% accurate. (That is the nature of a rule of thumb.)

Terms:

  • Z: impedance in ohms
  • F: frequency in Hertz
  • L: Inductance in Henries
  • k is a constant
  • A = area of a turn
  • N = number of turns
  • C = capacitance

Formulae:

  • Formal: The formula for inductance is: L = kAN^2
  • Formal: For a simple choke (not at resonant frequency): Z = 2πFL
  • Quasi-formal: For a choke at its resonant frequency Z, you treat it as parallel L and C. Z = 1/(impedance_of_L - impedance_of_C)

Informal

  • Increasing the diameter of turns, adds reactance.
  • Adding a turn, adds reactance.
  • An inductor has reactance (lots), resistance (little) and inter-turn capacitance (little).
  • Because an inductor has an L and a C, it has a resonant frequency.
    • Look up the resonant frequency in the ARRL Antenna Handbook or online. It is hard to calculate.
    • Often, you want the operating frequency to be well below the resonant frequency.
  • The windings of the inductor are usually kept well apart; often several conductor diameters.
  • A “W2DU balun” is just a bunch of ferrite beads (toroids) slipped over the coax feed line. If you need to choke a wide bandwidth, you can use a mix of ferrites to cover the range. Might need lots of beads an low frequencies.

Your First Activation

Would you like to try a SOTA activation? You do NOT need to be a mountain climber or even particularly athletic in order to activate a summit. Activating is simultaneously easy and difficult.

The first thing you’ll want to do is to pick out a summit. Not every hill you see is a qualified SOTA summit. SOTA summits are listed at the main SOTA site.

Start with one that’s near home. Plan to succeed, but minimize your investment, just in case things don’t go as planned.

Pick a hill that’s not too far from home. If you’re based in the metro Atlanta area, some good candidates for your first activation include:

If you need an easy/no hike, prime candidates include:

Map of Suggested First-timer Summits

Map of Good Atlanta-area First-timer Summits

Read the rules!

There two rules which receive lots of attention:

  1. “The method of final access to the summit must be non-motorised.”
  2. “Operations must not be in, or in the vicinity of a motor vehicle. No part of the station may be connected in any way to the motor vehicle.”

The first rule is intentionally somewhat vague, so as to permit participation by hams with limited mobility. For example, if you’re wheelchair-bound, you could meet this requirement by having someone push you for the last 100’. SOTA is on the honor system. Do what you can do. If it is an achievement for you to walk across the parking lot, that’s your “final access to the summit.” A more mobile Activator may set a personal threshold that requires him to park short of a drive-up summit, and walk the last 1/4 mile. Others may declare that if it isn’t at least a 5 mile bushwhack, they won’t activate it!

The second rule is intended to prevent operation from your truck or car. SOTA is about portable operation and not mobile operation.

While following the rules is necessary to get your points, don’t get hung up on memorizing them. Read them. Make a good faith effort to follow them. Review your plan with an experienced activator and debrief with an experienced activator after your activation. If you violate a rule, you don’t get your points. That’s a disappointment, but nothing worse. Remember, you picked an easy first summit, so you haven’t made an epic effort. You’ll learn much from your attempt and your next try will be a piece of cake.

You’ll need a radio. A portable HF rig is ideal. At a minimum, you’ll need something that is light enough to carry, an antenna, plus sufficient battery for 20 minutes.

It is possible to activate via HT, but your QSOs must not be via a repeater. You can call people on a repeater, and ask them to meet you on simplex, but your official SOTA contact must be simplex.) If you’re using an HT, you’ll want to line up some friends to chase you and it helps if they have good antennas, so they can do the “heavy lifting.”

You’ll need a portable antenna. A resonant dipole is a popular choice for HF – particularly if you don’t have an antenna tuner. With a good ATU, a 35.5 foot “random” wire with a counterpoise is another popular choice. Some operators love a magnetic loop. My personal favorite is an end-fed half-wave. Remember: You’ll be operating QRP from a mountain top. RF in the shack will not be a major issue; weight and simple setup are a priority.

Of course, you’ll need a paddle and/or a microphone, headphones, etc. Make up a checklist. Check it twice. If you discover you’ve left something out, add it to your checklist so you don’t forget it next time. Here’s a sample checklist you can customize to suit your needs.

Take water, a snack, pencil and paper. Make notes on what went well and what failed. Bring warm clothing. Even in the summer, it is cooler ‘up on top’ than it is at home.

Before you go, visit SOTAwatch and post your plans. This tells chasers when and where to look for you.

Once you’re set up on the summit, you can call CQ on your favorite frequency. You need four contacts in order to get your points for the summit. They can be contacts with any properly licensed ham. Your contacts need not be with SOTA chasers and your contacts need not log the QSO in order for you to get your points. (Of course, if they aren’t chasers, you can take the opportunity to encourage them to sign up.)

If want to work a pile-up, you want to get spotted on SOTAwatch. Experienced chasers monitor SOTAwatch; when they see an activation, they turn out in force. If you QSO with a chaser, he’ll probably post a spot on SOTAwatch. (You can ask him to do so, to be sure.) Once you’re spotted, expect a small pile-up in 1-3 minutes.

You can spot yourself. This is easy if you are on a summit with a cell signal. If you have an Internet-enabled device, visit SOTAwatch when you’re ready to go on the air and post a spot. If you don’t have Internet, but you can make a voice call from the summit, you can call a friend and have him post your spot to SOTAwatch. You can spot yourself via SMS. (See http://k4kpk.com/content/sota-self-spot-sms-usa.) You can spot yourself via APRS. (See http://k4kpk.com/content/sota-self-spot-aprs.) If you posted an alert and you use CW, you’ll be automatically spotted through the wonders of RBN and RBNGate.

When you return home, visit http://sotadata.org.uk/ and record your QSOs. Then visit http://sotadata.org.uk/activatorlog.aspx and track your status toward the coveted Mountain Goat award.

See you on the summits! 73 DE K4KPK / Kevin

Where can I find out more?

  • Official site: http://sotadata.org.uk/
  • Mailing list: https://groups.yahoo.com/groups/summits
  • K4KPK’s site: http://k4kpk.com/content/sota-menu
  • Email me (K4KPK). My email address is available via http://www.qrz.com/db/K4KPK.
  • Stay tuned. This is a recurring series.

Bio

K4KPK, Kevin Kleinfelter is Georgia’s first SOTA Mountain Goat, and was the 19th North American to achieve Mountain Goat. His first QSO was on a backpacking trip to a 5300 foot summit with his 12 year-old son. He has more than 120 activations, including Georgia, North Carolina, and Tennessee.

This story is Copyright 2015 Kevin P. Kleinfelter. A non-exclusive right to redistribute in electronic or printed form is granted to amateur radio clubs operating in the metro Atlanta area. All other rights reserved.

SOTA: Your First Chase

Would you like to try SOTA chasing? Basic SOTA chasing is a piece of cake, but there’s a world of subtlety to explore.

The Basics

In order to be a SOTA chaser, there are only two things you really must do:

  1. QSO with a valid SOTA activation.
  2. Record your QSO at (http://sotadata.org.uk)[http://sotadata.org.uk].

Finding a SOTA Activation

In order to QSO with a SOTA activation, you have to find an activation in progress. SOTA activations are announced in advance at SOTAwatch. The activator will post his planned activation time, operating frequencies, and modes. All you have to do is to be listening then and there.

Ha! If it were only that easy.

He’s probably not going to start at the scheduled time. He might be climbing a mountain (literally) to get there. He may have to wait out a thunderstorm or a snow squall. When he’s ready to go, he may find his planned frequency in use. These things don’t happen according to a precise timetable.

So you don’t know exactly when or where he’ll turn up, but there are tools to help.

An “alert” is where an activator posts a notice of his intent to activate. A “spot” is when someone has observed an activator on the air from a summit.

You’ll want to monitor the “Spots” section of SOTAwatch as the alerted time approaches. Within a few minutes of calling CQ, the activation will be spotted at SOTAwatch. (If you are lucky enough to be the first contact for the activator, help him out by posting a spot.) There are some other tools for tracking spots, and I’ll cover them in an upcoming article on SOTA resources.

Image of sample SOTAWatch Alert

Act Quickly

Conditions on the summit may be perilous. The activator may have an incoming thunderstorm, or may be hurrying to return to the trailhead before dark. Once the activation is spotted, you need to be on the air within a minute or two. Some activations last only a few minutes.

If you can’t get on the air for a bit, don’t despair. Many activators will work several frequencies. If you listen to the spotted frequency and he’s not there, continue to monitor SOTAwatch. If he’s preparing to QSY, the activator may be offline for a few minutes to change his antenna system. He’ll be spotted again after the QSY. Occasionally, an evening activator will return to the air once 0:00 UTC has passed, in order to activate the summit on both UTC days.

Act Politely

SOTA is a small community. We help each other. Reputation is important.

If someone else is calling the activator, stand by. If you hear, “Summit to summit” (S2S), definitely stand by. That’s a QRP chaser from another summit. They deserve all the help they can get! A SOTA pile-up seldom lasts more than a few minutes, and there’s almost always a lull within 5 minutes. Don’t repeat your call when others are calling.

If you’re QRP or you’re having trouble getting through, wait until the pile-up passes. Then call the activator and repeat your call sign, if necessary.

It’s OK to exchange pleasantries, but remember there are other chasers waiting. If you want to have an extended talk, complete your contest-style exchange and wait for the pile-up to finish. Once things are quiet, you can call the activator again and chat.

If you can’t get through, stay tuned. Listen. Try again. Propagation can change from minute to minute.

The activator Is King

Sometimes an activation is easy. Sometimes the weather is beautiful. Sometimes there’s a table and a bench at the summit.

Sometimes the activator is perched precariously on a snow-covered boulder and is slowly sliding off. (Been there! Done that!) A bear may wander through the site. (It happened to KI4SVM!) Be patient. Be tolerant. Even without surprises, if he had to hike 5 miles uphill to get there, he may be befuddled by exhaustion.

The activator wants to complete the QSO. Help him make that possible. Recognize that he may be facing challenges.

Recording Your Successful Chase

Once you complete the QSO, you’ll want to record the fact at SOTAdata.

Operating Bands and Modes

Most SOTA activity happens on 20 and 40 meters, using SSB or CW. You’ll find a smattering of other HF bands (particularly 17 or 30 on a contest weekend), but seldom another mode on HF. Some activators are exclusively CW; some are exclusively SSB; some use both. If you see an alert for an activation that doesn’t include a band/mode you can work, email the activator and ask him to try your band/mode. However, be aware that many activators carry tiny radios that only work limited bands on CW.

If you’re a Technician, you’ll face some challenges, but they are surmountable. One option is the 10 meter band. If you want 10 meters, you should contact the activator and ask him to try it (if his rig supports it).

VHF is another option. To succeed with VHF, you’ll need a good antenna. It helps if you can aim it at the summit. If you’re limited to this mode, contact the activator in advance and ask him to use it. Some activators will have only a rubber duck antenna. Others specialize in VHF and they’ll have a beam. If they know you’re there, they can aim for you. VHF can be worked over surprisingly long distances because line of sight from 5,000 feet up is much farther than in the ‘flatlands.’

If you’re using VHF, the contact must be direct! You can meet up with the activator via a repeater, but you must complete a simplex QSO in order to qualify for SOTA.

A Word About Antennas

If all you’ve got is a low dipole, that’s going to limit your chasing. Use what you’ve got. You’ll need to focus on activations within an NVIS footprint. Again, contact the activator in advance and ask him to try NVIS on a suitable frequency. North Georgia and western North Carolina are full of summits and they are workable NVIS from Atlanta.

If you’ve got a beam, you’ve got an advantage. As an activator, one of my most reliable contacts is transcontinental, from the southeastern Appalachians to NS7P in Oregon. He’s got a beam at 60’, a K3, and lots of skill. Make the most of what you’ve got.

Reliability

If you chase often, activators will learn your call sign. Reliability helps. If he hears your call often, he’ll recognize it easier and quicker. If you’re a ‘regular,’ he may extend his activation in an effort to catch you when you’re slow to get on the air.

See you on the summits! 73 DE K4KPK / Kevin

Where can I find out more?

  • Official site: http://sotadata.org.uk/
  • Mailing list: https://groups.yahoo.com/groups/summits
  • K4KPK’s site: http://k4kpk.com/content/sota-menu
  • Email me (K4KPK). My email address is available via http://www.qrz.com/db/K4KPK.
  • Stay tuned. This is a recurring series.

Bio

K4KPK, Kevin Kleinfelter is Georgia’s first SOTA Mountain Goat, and was the 19th North American to achieve Mountain Goat. His first QSO was on a backpacking trip to a 5300 foot summit with his 12 year-old son. He has more than 115 activations, including Georgia, North Carolina, and Tennessee.

This story is Copyright 2014 Kevin P. Kleinfelter. A non-exclusive right to redistribute in electronic or printed form is granted to amateur radio clubs operating in the metro Atlanta area. All other rights reserved.

What is SOTA?

SOTA (Summits On The Air) is an awards program to encourage operating from the tops of mountains. “Activators” get points for operating from a summit. “Chasers” get points for contacting activators. Points are good for… counting, and not much else!

Why would I want to activate?

My XYL, certifiably smarter than me, says, “It is a perfect combination. You get to spend time outdoors and you get to collect shiny toys.” That pretty well sums it up.

Have you ever hiked to the top of a mountain and wondered, “This is nice view. What do I do now?” Now you have a mission. Pull out the radio, throw a wire into a tree, and work a pile-up. When you call CQ from a summit, it seems as if everyone wants to talk with you.

There are a variety of awards, including the Mountain Goat award for 1000 points, Activators who achieve 1,000 points earn the Mountain Goat award. As of mid-December 2014, only 21 hams in the US have achieved this award.

Other reasons to activate:

  • Tired of QRM? The nearest source of QRM is typically miles away.
  • HOA restricts your antenna height? My tower is on a 4,000 foot base.
  • Operating VHF? Line of sight can be 100 miles in all directions.

Why would I want to chase?

It’s easy enough to work Bubba, with his QRO kilowatt and a beam pointed at you. Hone your skills pulling a 2 watt signal sent from a random wire in a tree out of thunderstorm QRN. (“ I know he’s there. I can hear others working him. Maybe if I narrow my filter and up the RF gain… Bingo! Got him.”)

Make progress on your Worked All States award. Anywhere there’s a qualified summit, sooner or later, you’ll find an activator. Earn the prestigious Shack Sloth trophy. (SOTA has a sense of humor!)

With a good antenna, go after DX activators. Make contact with a ham who’s clipped to a piton from a summit in the Alps. See if you can QSO with that operator who’s perched on the rim of a volcano. (Yes, this happens.)

Activating or chasing isn’t enough of a challenge. What else have you got?

Maybe you’d like to combine chasing and activating. When two activators make contact, this is a “summit-to-summit.” Since you’re both QRP and you’re both mountain-top portable, this is even more of a challenge (and more gratifying when you succeed).

SOTA isn’t fair!

It is important to note that SOTA is not about fairness – it is about participation. There are easy 10-point summits and there are epic 1-pointers. Do not look for fairness in SOTA scoring. It isn’t there.

The rules of SOTA are designed to encourage participation – to get activators activating and chasers chasing. From time to time, someone will propose a modification of the rules, to rationalize scoring. Socially, this is on par with passing gas at a dinner party!

But I’m not athletic and I don’t have a quad at 60 feet. Can I play too?

Activation requires operating portably from a qualified SOTA summit. At a minimum, you’ve got to carry your equipment away from your vehicle, and you must use a battery or solar power. Most activations require a hike up the side of a mountain, but remember that the goal of SOTA is participation. At one extreme, you could drive to a drive-up summit, climb into a wheelchair, have a buddy pile your equipment into your lap, push you across the parking lot, and you could operate from a picnic table. At the other extreme, you could backpack 2 days into wilderness, followed by a 5 mile bushwhack, and operate from a snow-covered escarpment.

Where can I find out more?

Bio

K4KPK, Kevin Kleinfelter is Georgia’s first SOTA Mountain Goat, and was the 19th North American to achieve Mountain Goat status. His first QSO was a SOTA activation on a backpacking trip to a 5300 foot summit with his 12 year-old son. He has more than 110 activations, including Georgia, North Carolina, and Tennessee.

This story is Copyright 2014 Kevin P. Kleinfelter. A non-exclusive right to redistribute in electronic or printed form is granted to amateur radio clubs operating in the metro Atlanta area. All other rights reserved.

A Brief Survey of Some Budget Paddles for Trail Use

I’ve acquired a menagerie of moderately-priced trail paddles. “Moderate” is defined as “half the price of a Begali Adventure or less.” I’m sure the Begali is a wonderful piece of machinery, but the key plus a KX3 mount, plus shipping looks like about $350, and I’m just not going to pay that much for a trail paddle. I’d go there if it would actually make me a better sender, but it won’t. (Yeah, I have spent about that much on my menagerie. If I’d known then what I know now…)

First, I’ll state my preference and skill level.

I like an iambic paddle with short travel, requiring a little force, with a solid stop when it makes contact. I want to feel when I make contact. I don’t want to have to push real hard, but I want to be able to leave my finger in contact with the paddle without accidentally making contact.

I’m a neophyte at CW. I’ve been studying it for about 2 years, and I’m up to about 15 WPM, but I’ve only made a handful of CW contacts. While my comments may be useless for a more experienced fist, I’m hoping that other neophytes may find my summary useful.

  • Absolute favorite: AME Porta-paddle II at $75. You can adjust the throw and the force to suit. It has a nice, solid stop when you make contact. I have it mounted on a heavy base at home. This is a paddle I’m happy to use at home, as well as in the field. I’m ordering a quick-mount base for use in the field. This just feels like a Mercedes. It isn’t perfect. It makes the circuit through the pivot pins, and I have to disassemble it and add some Deoxit to the pivot occasionally. With metal grips, I’ve been told it will suck the heat out of my fingers in cold weather. That could be a problem.

  • Distant second (tied): Palm Pico with KX3 Mount at $160. It fits nicely with my KX3. It has plastic grips, so it won’t suck the heat out of my fingers in cold weather. It is lightweight. In addition to the KX3, it came with a magnetic base and a mounting plate for the base, but the mounting plate is firmly glued inside the carry case, so I’m going to have to order another plate in order to be able to use the magnet mount. This would be a really nice paddle, except the stop isn’t nearly as solid feeling as the Porta-paddle. I’d never use it at home, just because I just don’t care for the feel.

  • Distant second (tied): KXPD3 from Elecraft at $130. It fits nicely with my KX3. It has a nice stop to it. It is lightweight. Elecraft stands supports it exceptionally well. (They replaced mine when I complained about a loose pivot.) It is certainly an adequate paddle. It is ‘rattly.’ I don’t know how to describe it better. It is loud when making contact and releasing, and the loud clacks are tactile, not just audible. Some have had trouble with the circuit through the pivot pins, but I haven’t (yet). Either Deoxit or the well-documented wire mod will address the circuit issue. I wouldn’t use this one at home, because I just don’t care for the feel.

  • Interesting: Te-ne-key at $40 ($60 with a base). Very clever. It has curved copper pieces. One end of the copper piece has clear tape under it. When you press on the copper, it gets flatter/longer and it makes contact with the screw near the mid-point (which is also insulated from the steel bar). Small and lightweight. Inexpensive. Minimalist. Some people really like it. Some people like to hold the bar in one hand, while keying with the other. It doesn’t feel like a key to me. I can make it work by adjusting it to a minimal throw and treating it somewhat like a touch paddle. It takes more concentration than a normal key, and I have very little brainpower after a tough hike. It has metal grips that may suck the heat out of my fingers in cold weather. The web site says it is patented, but I did a patent search and couldn’t find it.

  • Promising: Bulldog at $35. Very clever. It is a Gem clip (a.k.a. Bulldog clip). He’s put insulating tape on the clip, then copper tape to make contact. When you squeeze, the clip arm contacts the copper tape. Has a nice stop to it. Right now, the throw is a bit far for my taste. It is adjustable by bending the retaining wire. I’m not so happy about that. It is hardly a precision adjustment, and it will be prone to maladjustment after packing it. I’m going to have to tinker with this one a bit. I really don’t like the current long throw, but it might be possible to adjust it just right. I’ll have to see whether it stays adjusted. Although it has metal coat buttons for the grip, I could replace those with plastic buttons to reduce the thermal conductivity.

SOTA - Planning the Hike

Here are some notes on planning my route.

  • As of July/August 2014, I’m rebuilding my laptop files/programs after some hardware problems, so I’m re-thinking what I store on my computer.
    • I am not going to install Delorme Topo 10.
      • It occupies 10GB. It does have some content my other maps don’t have, but much of the additional content is for trails that don’t really exist. It requires Windows.
    • For topo quadrangles - CalTopo
      • I used to download topo quadrangles from the USGS Map Store. I’m switching to online use of CalTopo. I might occasionally download a topo - perhaps a historical edition of a map to see roads that aren’t shown on current maps. If CalTopo goes offline, I can go back to downloading USGS quads. For now, I’ll avoid having the local data. The down-side is that I can’t plan my trips when offline, but that is an infrequent need.
  • Handheld GPS - Garmin Etrex 30.
    • Garmin has bigger units. Small is better for extended hikes. This one runs all day on a pair of rechargeable AA.
    • Used with Garmin Basecamp software.
    • Used with Garmin Topo US 100K
      • I could go with the Southeast 24K series for more detail. I couldn’t fit everything on the GPS unit. It might be nice to have higher map detail, but the GPS positioning isn’t that accurate.
  • Convert Google Maps route (URL) to GPX - GPS Visualizer - Convert Input
  • GPS/GPX to Google Maps - GPS Visualizer - Make a Map or VeloRoutes
  • Convert GPS data file formats (e.g. KML to GPX) - GPS Babel
  • Reduce the detail (fewer points) in a GPX file - GPS Babel
  • I haven’t tried this, but it looks interesting for finding out who owns private land around a summit: http://www.huntinggpsmaps.com/store/hunt-mobile-apps
  • Collected National Park maps: http://npmaps.com/

Building the KD1JV PFR-3a

I’m building a KD1JV PFR-3a transceiver.

Issues I’ve encountered:

  • A few missing parts:
    • R48 (470 ohms) was missing.
    • #24 magnet wire was missing.
    • #28 magnet wire - not enough supplied
  • The board has two holes marked “+PWR” above them and “BAT EXT” below them.
    • I thought these two holes were for external power, with the left being positive and the right implied negative. Oops. “BAT” is positive for the internal battery pack. “EXT” is positive for external power. The nearby 2 GND holes are for negative. When I hooked + to the left of BAT EXT and - to the right, nothing lit up.
  • There are errata at http://www.qrpkits.com/pfr3.html . These errata are for the PFR-3.
    • The current radio is the PFR-3a. The PFR-3a instructions dated “11/16/09 updated 3/1/10” do not have errata. They should be followed as-is.
  • The trimmer capacitor for the BFO goes on the bottom of the board.
  • SA612A = SA602A
    • I had a little crisis of confidence when the instructions said to install two SA612A, and all I could find were one SA612A and one SA602A. A little googling revealed that they are the same, for all intents and purposes. Steve Weber says they are interchangeable.
  • Pretests on page 11:
    • Voltage on pins 1 and 13. It clearly says “Measure the voltage (to ground) on pins 1 and 13…” I measured the voltage between pins 1 and 13. You’re supposed to measure the voltage between pin 1 and ground; then measure the voltage between pin 13 and ground.

CW Cheat Sheet

  • CQ CQ de K4KPK K4KPK K
  • xxxxx de k4kpk kn
  • tnx (his name) =
  • ur rst is ( 599 / 559 / 339 ) =
  • name hr is kevin =
  • qth is Atlanta, Ga =
  • rig is KX3 at 12 watts =
  • ant is end fed 25 foot wire =
  • job is fixing systems for telco =
  • wx is ( sunny / rain / windy / cloudy / hot / cold ) =
  • been ham since 2012 = new to cw =

  • mostly i do sota - summits on the air - mountaintop portable = what is ur fav ham specialty? = xxxxx de k4kpk kn

  • CW is tiring to a newb = 73 es tnx =
  • (must go to work) / (oops, kids quarrel) =
  • (back to u) / (73 es tnx) =
  • xxxxx de k4kpk ( kn / sk)

Tunable for CW (includes 500 Hz safety margin):

  • 40M: 7.025.5 - 7.124.5
    • SKCC elmering: 7.114
      • every Friday is SKCC “novice day” on the frequencies near 7114
    • QRP calling: 7.030
    • QRZ forum suggests:
      • 7.120-7.125
      • 7050-7060.
      • Try between 7050-7125
      • Try 7100 to 7150
      • Join SKCC
      • Do a google search for Texas Slow Net, Oklahoma Training Net, Georgia Slow Net, slow CW net, etc
    • FISTS calling: 7.058 and 7.028
  • 30M: 10.100.5 - 10.149.5
    • FISTS calling: 10.118
  • 20M: 14.025.5 - 14.149.5
    • QRP calling: 14.060
    • FISTS calling: 14.058
  • 17M: 18.068.5 - 18.109.5
    • FISTS calling: 18.085
  • 15M: 21.025.5 - 21.199.5
    • FISTS calling: 21.058
    • Old Novice band: 21.1-21.199.5
  • 12M: 24.890.5 - 24.929.5
    • FISTS calling: 24.908
  • SKCC - CW Elmer list - http://www.skccgroup.com/member_services/morse_elmers/
  • FISTS - slow speed CW net list - http://fistsna.org/pdfdocs/slownet.pdf
  • CW beginners guide - http://www.k4icy.com/BegginersCWguide.htm

Cheap Coleman Clothesline Reel Source

http://www.leacockcolemancenter.com/store/searchbasic?searchtext=Coleman%20Laundry%20Reel

Handy for antenna wire or counterpoise wire.

Keywords: Spool, winder, wire, SOTA