Workbench

My Week in Radio

• Took down my 2M antennas to straighten and resolder.
• Catching up the radio blog with my recent experiences.
• Trying F4HWN firmware on Quansheng radios
  • previous firmware, AUBSUK, for my Quansheng radio was skipping channels when I activated more than 1 scan list.
  • larger display with single VFO
  • rethinking my scan lists
  • the S-meter is calibrated differently from the other firmware
• no questions, because I should just be reading the antenna book
• FT Challenge coming up in 2 weekends. *** Others
• KD3ACF, JT:
  • acquired a j-pole for the attic
  • new ham with an HT
  • magmount on the car, tested with WA3VEE from Manheim High School
• W8CRW, CR:
  • 985 activities
  • Red Rose activities
  • Salem CCARS acitvity
• W3QP, Tim:
  • trip to HRO
  • planning trips
• WA3VEE, Ron:
  • working on an old receiver
    • re-capping
    • Hammerland hq140x
    • terrible, loud 120hz buzz, so ordered capacitors to replace them
    • cleaned
    • fixed
    • needs just a little more work, alignment
  • got over to KC3YSM, Steve’s place to help with his antenna
    • analyzed
    • Buckmaster OCF dipole
• KC3RFG, Jim:
  • watching 10m
  • Croatia, Belgium
  • repairing the 160m/75m dipole, new balun
• AF3Z, Jim:
  • testing his 1-tube QRP transmitter
  • practiced some CW with a friend on 10m
  • found sweden and belgium lower in the band.
• KC3OOK, Bill:
  • 985 net, simplex net
  • working on tower
  • helping Joe, W3GMS, assemble his new tower
• KC3SCY, Luke:
  • lots of time off from school this week
  • 10m has been wide-open
  • spent some time on 40m SSB and AM
• KC3VRW, Phil:
  • attempted to build a 10m inverted-V
  • MFJ tuner
  • trying tech HF frequencies

Questions

• W3QP, Tim: Follow up on battery measurements for the TSA, Watt-hours instead of Amp-hours.
  • bigger batteries have bigger thermal events.
  • Wh is the amount of potential power.
  • Wh doesn’t require doing the math to consider voltage in combo with Ah.
  • 18Ah at 12V.
  • The nominal voltage for the cells is less.
  • Expected usable volts are even less, so Wh is less than just V*A.
  • Nominal voltage can be different across different battery chemistries.
  • Nominal voltage may not be obvious.
  • 11.1 Nominal voltage might be 12.6V at peak charge.
  • Volts and Amps are important for application, but Watt-hours is better overall for capacity.
• AF3Z, Jim:
  • tinkering with Hartley oscillator: mica capacitors, ceramic capacitors, what’s the difference of all the different capacitors?
    • WA3KFT, John:
      • ratings: capacitance, voltage.
      • The “dry electrolytic” is a paste, not oil.
      • main purpose is filtering AC converted to DC.
      • filtering some frequencies
      • ceramic capacitors are pretty stable, until overheated.
      • mica capacitors are small capacitances, pF. used for frequency stablizing.
      • variable air capacitor
      • oil filled are higher capacitance and used for low frequencies in power supplies, etc.
    • WA3VEE, Ron:
      • film capacitors
        • different dielectric
        • used for audio.
      • paper capacitor
      • dielectric is anything that separates the plates.
      • air capacitors
    • W3QP, Tim:
      • silver mica are maybe lower loss than ceramic
      • multi-layer capacitors for higher currents
    • W3DIB, Greg:
      • negatives of certain capacitors:
        • some dielectrics leak
        • tantalums can dead-short, like in a power supply.
      • saw a cool video of people building filters for cheap radios in places with heavy RF to keep them working better.
    • WA3VEE, Ron:
      • they leak when they get overheated.
      • leads to the plate have a little resistance so generate heat.
      • capacitor can have a vent that leaks under pressure.
    • NA3CW, Chuck:
      • capacitors are deceptively complex
      • all components have some bit of capacitance, inductance, resistance.
      • vacuum dialectric for especially high voltage.
      • lots of trade-off characteristics
      • some are piezoelectric (microphone), like a condenser microphone
• WA3VEE, Ron:
  • homework: does a capacitor allow current to flow through it? KC3SQI, Wayne:
• solar telescope demos on December 11 at some park

My Weeks in Radio

• QRP on a couple Hawaiian islands
• Not much 2m activity on the islands
  • added some repeaters and scanned
• POTA
  • no summits
  • all successful activations via FT8/FT4
    • allowed me to use pskreporter to study my propagation on different bands, even if other stations didn’t answer my call
  • practiced some CW on the beach when I didn’t get out the computer
  • mostly turned up to 8W
  • mostly 10m-30m and everything in between
  • challenging to be on an island where you have to go thousands of miles or you reach no one.
  • 6 parks and 2 trails on 2 islands:
    • inside Diamondhead caldera
    • atop steaming Kilauea
    • rocky lava fields
    • sandy beaches
  • reached:
    • west: Australia, New Zealand, Fiji, Japan, Russia, China, South Cook Islands, Samoa
    • east: North Carolina, Kentucky, Ohio, Dominican Republic, Argentina
  • antennas:
    • 40M EFHW where I had room,
    • 21.5M-long EFRW with less room
    • vertical whip and coil attached to a fishing pole for a less conspicuous setup on some beaches
• It may be time to start cobbling together an allstar node.

Others

• W3JAM, Jeff: Jerry Sevic (w2fmi) books on transformers and baluns
• KC3TMZ, Matt:
  • Lives in a park
  • Built a dipole and analyzed it
    • really good SWR: 1.048:1
    • 20 ft into the tree
    • reached California on 20m
    • ran into ARRL Sweepstakes
    • dipole in a tree is a lot of work
    • playing with Inovato Hamclock
• WA3VEE, Ron:
  • worked ARRL Sweepstakes a bit
  • cleared the bench
  • may have gear to sell soon
• KB3ZIM, Bob:
  • avoided ARRL Sweepstakes
  • enjoying 10m
  • some 10m AM as well
  • spent time in Honolulu and enjoyed the Diamondhead years ago
• KC3RFG, Jim:
  • had a balun fail
• KC3YSM, Steve:
  • getting an HF antenna up with help from Chuck and Bill
  • George lent the launcher
• KC3TYX, Vic:
  • Sweepstakes: 75 contacts
  • VaraC for keyboard chat on HF
    • lost settings and had to setup again
• W3QP, Tim:
  • found the 4th edition of the balun book on archive.org
  • winding 2 wires around the toroid is a lot like winding coax
  • winding 4 wires in opposite directions will give more bandwidtch
• NA3CW, Chuck:
  • learned lots from W2FMI book
    • W2FMI tested everything extensively
  • got Steve’s antenna in the air…through the vines, thorns, etc
  • normal nets, including PMA AM net.
  • working on an ultimate transmatch tuner
• KC3OOK, Bill:
  • helped with Steve’s antenna today
  • 2m band opening on Sunday: PA to Ottawa on DXView
• W8CRW, CR:
  • 985 breakfast
  • showed wife around 10m tech area
• AF3Z, Jim:
  • built a Hartley transmitter for 1929 AMA event
    • 1 tube
    • 1-2W
    • worked 5 stations over 80 minutes
• KV3JGB, Matt:
  • 985 breakfast
  • launched an antenna with help from 985-ers after breakfast
  • starting cwops
• W3MFB, Mike:
  • just chatting locally on the radio
• W3FES, Fred:
  • building out a new, larger ham desk
• W3MOW, Mike:
  • quiet week

Questions

• KC3TMZ, Matt:
  • setting up shack in the garage, and ordered a hamclock. wifi is a bit weak. can he extend with a yagi?
    • W3CRW, CR:
      • years ago, had a yagi antenna for wifi, and it worked
      • wifi extender/repeater does even better
    • W3DIB, Greg:
      • trench fiber instead of cat5/6.
        • isolated from electrical storms
      • if you don’t need a ton of bandwidth, try wifi halow bridge on 900mhz.
        • 4Mb
      • yagi antenna may pull in noise from others
    • KB3ZIM, Bob: Adam, KB3ZUV, another 985-er, is working on a similar project
  • flying with HTs?
    • WA3VEE, Ron:
      • bring a good copy of your license printed from cores
      • batteries must be carried on, not checked
    • KB3ZIM, Bob:
      • batteries are the concern
      • check size with the airline
    • KC3WWC, John:
      • wonderous bag of radio gear
        • HT
        • 10Ah lifepo4
        • QRP radio
        • antenna wires
        • if you check any gear, separate out the batteries to carry
    • WA3VEE, Ron:
      • sent link to website
      • limit 8wh, do the math.
      • precheck helps smooth the screening
    • W8CRW, CR:
      • CR has more trouble with carrying powertools since they’re not marked than HT
• KB3ZIM, Bob:
  • wants to get a wire for 160M in the air.
  • could be a long wire with a tuner
  • what’s a good length for a random wire
  • W3QP, Tim: lots of tables out there
  • KC3WWC: google “udel random wire”
    • always choke and counterpoise to avoid common mode current
  • KB3ZIM, Bob:
    • google “ham radio secrets”
      • talks about tuning the counterpoise
    • could try a super-slinky
• W3DIB, Greg:
  • recently got on RF instead of
  • has anyone reverse-engineered the serial connections for Yaesu
  • W3QP, Tim: could use wireshark to look at serial traffic through usb serial adapter
  • KC3WWC, John: there’s cat and drivers for everything
  • W3DIB, Greg: this is a lesser radio without cat control, so he’s looking to control all the comms himself

My Week in Radio

• R1CBU 0.26.0 firmware for my X6100
  • I continue to maintain a fork of the code that modifies the database to show boundaries of US privileges and recommended usage.

Questions

• W3MFB, Mike: increased tower height, switched to 60ft of new coax. 35W 1.9:1 SWR, so worse than it was before. UHF is bad too. Checked it with NanoVNA. Seeing 1.3:1 SWR. Trying an analog SWR meter. Using Yaesu 991A. Showing 2:1 SWR. SWR goes up with different power.
  • NA3CW, Chuck: Test the tester. SWR shouldn’t change with power. Could be something heating.
  • W3QP, Tim: He does see different SWR at higher power due to reflections from his car. Shorter coax is better, but stay away from quarter wavelengths.
  • W3JAM, Jeff: Test the tester. Hearing him fine on the input, so it’s good.
  • AF3Z, Jim: RF, common mode current, into the meter can cause erratic behavior.
  • NA3CW, Chuck: RF on outside of the feed line is sometimes hard to avoid, and can cause reading issues. Grabbing line at different places will cause readings to change.
  • W3QP, Tim: Some antennas recommend at least a turn of cable at the antenna to choke.
  • KC3OOK, Bill: 1.2 to 1.3 is a 0.9% loss.
  • W8CRW, CR: is that antenna tune-able.
  • W3MFB, Mike: may try ferrite beads at a height he can reach.
• W3MOW, Mike: Looking at Electric Vehicles. Who knows a reputable electrician to run power? Drop him the email you find on QRZ.
• KC3TMZ, Matt: Getting noise with random wire on G90. 71ft 9:1 wire. How does one run the counterpoise?
  • KC3MFB, Mike: 17 ft, opposite direction, if at all.
  • KC3RFG, Jim:
    • try different places.
    • choke at the radio, especially if you don’t
    • run a counterpoise
  • W3QP, Tim:
    • There is always a counterpoise, so provide one so you can control it.
    • Number of turns or number of beads will be effective at different frequencies.
  • NA3CW, Chuck: There’s an article on 985 website.
  • KC3NZT, Harvey:
    • The further from a balanced antenna, the more it’ll force a counterpoise, and that means your coax, so changes around your antenna (body) can change things as well.
    • Run the counterpoise opposite a sloper or flat topper,
    • you can get some gain in the direction of the counterpoise.
  • KC3TMZ, Matt: Propagation to light/dark places?
  • W3MFB, Mike: wire runs NE-SW, and it doesn’t matter for direction too much.
  • KC3NZT, Harvey: Do you hear them? How do you know you’re not getting to them?
    • Can hear them, but they don’t hear him. Did manage Belarus once.
    • Do they have other stations calling them? Is it a pile-up?
    • He’s getting beat for only 20W.
    • Don’t get discouraged. It takes some technique.
  • W3MFB, Mike: Don’t worry about 20W. Don’t call QRP.
  • W3QP, Tim: Operates a lot of 10W. Propagation depends on radiation pattern. EFRW can have weird patterns with spiky lobes.
  • KC3TMZ, Matt: lots to learn, will take a recording from Ron.
• KC3WWC: Headed to Hawaii for a couple weeks and taking radios for all bands. What should I expect/try while traveling?
  • W3QP, Tim:
    • SOTA from volcanos!
    • salt water will give a great boost for DX.
    • lots of asia
• WA3VEE, Ron: the virtues of broadcastify

My week in Radio

• I saw aurora for the first time, and I got some nice photos.
• I visited K3IR tower sight in Mount Joy during PA QSO party
  • I listened to people contesting, but didn’t participate.
• TYT TH-9800: 50W into the tape measure yagi, tried it on the roundtable, still have work to do
• I threw my main 71-foot EFRW higher into another tree.
• I watched my flagpole and yagi in the wind
  • walked it down while I had a kid here to help
  • scoping a new location for it as a tilt-up attached to the house
  • collecting pieces for some experiments in engineering

Questions

• W8CRW, CR:
  • National Electronics Museum is hosting a class for general license.
  • How far from the mast should a vertical yagi antenna be installed?
  • Can it be installed 45-degrees to be used for both horizontal and vertical?
    • WA3VEE, Ron: some have had success at 45 degrees for satellites.
    • KC3SQI, Wayne: 45-degree will lose you 1.5dB
• WA3VEE, Ron: what is the ideal thickness for a bus-bar to which you’re mounting a lightning arrester.
  • KC3RFG, Jim:
    • 1/4-inch minimum. thicker won’t hurt anything.
    • mechanically strong (bolted) instead of soldered
    • woven ground strap is best, but 6AWG stranded is good.
  • NA3CW, Chuck:
    • avoid inductance, so use strap or bar, not wire
    • no right angles, no coils, no spirals
• KC3RFG, Jim: Hearing ignition noise on HF on battery or on truck power. How best can one eliminate that noise?
  • KC3SQI, Wayne: Remove the mast from the coax and see if you still have the noise. If it’s still there, then it’s coming from power cables. Try a better ground directly to the battery. On vehicles that rust, bolts don’t ground so well after a while, so then you get lots of grounds connecting back through the antenna.
  • KC3KZB, Aaron: go for a short ground, and keep ground wire away from ignition wires
• KC3SQI, Wayne: What’s the mechanical strength for 1.5-inch conduit?
  • WA3VEE, Ron: See Ugly’s Electrical Reference.
  • KC3RFG, Jim: that’s right.
• KC3WWC. John: I like that I can build my transformers and cut, measure, and test wire antennas, Is it practical to build, iterate, expand a homebrew yagi?
  • NA3CW, Chuck:
    • blatant plagarism: they’ve been around for a long time.
    • modeling programs, manuals, existing antennas.
    • different goals: gain, bandwidth, front-to-back ratio examples in the antenna book
    • software
    • moxon antenna: 2 element yagi with bent ends, massive front-to-back ratio
      • great for direction-finding: forward to get in the neighborhood, then reverse to find the null where it disappears
      • not much gain though
• W8CRW, CR: Is there a program for windows to map out a computer network?
  • W3DIB, Greg:
    • there are lots of tools to probe and fingerprint machines to try to disclose the host OS.
    • also ping, angryping, etc.

My Week in Radio

• I saw some antennas at the Ham Fest, but I couldn’t bring myself to buy any. I’ll build.
• I passed extra at the Ham Fest
  • I guess enough workbench discussion sunk into my brain.
  • Found I can download and search a copy of the entire ULS database like some of those other helpful websites that show available callsigns.
• POTA along the Susquehanna River.
  • Normal FT8 to get to 10 contacts.
  • 1 CW contact, and it wasn’t painful.
  • I tested out my newest printed EFHW antenna winder.
• Running and comparing Meshtastic and APRS more
  • Why use it?

Other News

• WA3VEE, Ron, PA QSO Party this weekend.
• KC3SCY, Luke, switched his loose couple radio from diode to cat whisker.
• KC3ZSJ, Gary, is playing with new antennas.
• W3FES, Fred, has a new FT-60R
• AF3Z, Jim, is headed to Cornwall Ranger Station for PA QSO Party

Questions

• KC3SZO, Chris: How can I overcome some terrain in the way of my RF?
  • WA3VEE, Ron: Antenna in the attic
  • NA3CW, Chuck: VHF isn’t exactly line-of-sight, so there is hope.
  • KC3WWC, John: Lower YAGI inside had advantages over a higher outside ground plane quarter wave.
• AA3LH, Leon: Let’s confirm repeater settings for this old radio and new antenna going in the car.
• KC3WWC, John:
  • I could change my callsign now.
  • I’ve only used this one for a year, so not super-attached.
  • For contesting, I see the benefit of a shorter call, so I might ultimately consider phonetic and morse weight.
  • How did you choose your vanity call? What strategies should I consider?
  • NA3CW, Chuck: initials.
  • W8CRW, CR: initials.
  • AA3LH, Leon: initials, and wanted an “A” call.
  • AF3Z, Jim: assigned by FCC. Consider how it sounds in CW.
  • WA3VEE, Ron: assigned, and sounds cool.
    • He also has K3DTS for the campus location of his old club.
    • quick and simple for CW
    • 1-by-1 is for special events.
    • easy to understand, so stay clear of confusing letters; V, C, Z, etc.
    • sound in sideband: normal or phonetic.
  • KC3OOK, Bill: assigned.
    • catching phonetic for DX
    • NA3NA was catchy.
    • KC3QQD is funny: Quack Quack Duck
  • Callsign ideas:
    • KD3FN
    • KB3VI
    • KC3VI
    • AA3WW
    • AA3KK

My Week in Radio

• I moved the tape-measure yagi to the top of a 25-foot flagpole in the backyard.
  • 10 W, but not quite doing it.
  • There’s still too much of a hill.
• I upgraded the X6100 baseband, stock firmware, and 3rd-party firmware.
• Some CW
  • barely got 2 CW contacts hunting POTA, but I got into their logs
  • heard AF3Z on 40m out on his trip
  • morsle app to practice copying CW words and call signs
• I redesigned and printed a new antenna winder.
• I heard some AM and some RTTY during contests.
• I cleaned up and organized all the radio stuff from the move instead of contesting.
• I’m going to try for my extra ticket at the next Ham Fest.

Others’ News

• KB3RFG, Jim: all the bands open today in lots of directions
• NA3CW, Chuck: lot’s of AM fun
• AF3Z, Jim
  • spectated some RTTY contesting
  • 10m CW conversations
• WA3VEE, Ron: LMR400 (KMR400) coax is lowest loss practical

Questions

• KN3I, John: How does one make an AM rig sound good? Carrier power, modulation, etc.

My Week in Radio

• Tried some new firmware for X6100, but no good
• Moved Houses
  • installed some antennas
    • 71ft random wire
    • 1/4 wave ground plane
• POTA weekend
  • Michaux State Forest
  • Caledonia State Park
  • King’s Gap Environmental Education Center
  • Pine Grove Furnace
  • Used an EFHW for everything
  • Ran out of battery on Pine Grove Furnace on the second day, so did the whole thing with 1W FT8.
  • Tried calling CQ on CW to see if RBN would pick me up.

Questions

• Charles, KC3SWC: What books about operating do you recommand?
  • Ron, WA3VEE
    • ARRL Operating Guide
    • ARRL: Basic Electronics for Radio
    • Electronics for Hobbyists
  • John, KC3WWC
    • Spend lots of time listening to others
    • Youtube
  • Chuck, NA3CW
    • Lots of people are listening
    • Keep it civil
    • Keep it technical
    • Don’t bore people with aches and pains
    • ARRL Operating Manualy
    • ARRL Handbook
    • ARRL Antenna Book
    • Be helpful
    • Be interesting
• Wayne, KC3SQI: How do you tone squelch for receiving and filtering away QRM from another repeater on the same frequency?
  • Ron, WA3VEE: tone squelch or “split tone”
  • CR, W8CRW: T-SQL = tone squelch
  • Chuck, NA3CW: would be useful when the band opened and a distant DMR is overtaking 985.
• Ron, WA3VEE: Yaesu HTs can only do one of the other, not both.

My Week in Radio

• The photos looked great from Bill’s, KC3OOK, antenna party
• https://ft8.live/ for a more responsive visualization of pskreporter data.
• POTA at Susquehannock
  • No digital, only sideband
  • QSO parties for Hawaii, Kansas, and Ohio
  • Bothered someone with a bit of CW badly
• Morse Machine app on Android for practicing
• I finally confirmed 50 states on QRZ.com with Hawaii
  • generally 5-10W
  • mostly digital, some sideband
• I started playing with a couple Meshtastic nodes
  • Impressive range for low power, ~125mW

Questions

• W8CRW, CR: Is there any device that would log a date-time every time you key your VHF/UHF transmitter?
  • W3DIB: string together an arduino, some AI, and voice recognition
  • WA3VEE: pull it from broadcastify
  • K3VIL: newer ICOM has a recording feature
  • NA3CW: security system that can log contacts opening/closing
  • W8CRW: looking for something radio agnostic
• KC3OOK, Bill: Balanced-L vs T-Match network tuner for open wire feed. Is one better than the other?
  • Balanced L = L-C-L and it’s fed on the low-impedance side.
  • T-Match has a wider range, but maybe less efficient.

My Week in Radio

• Iambic Keying
  • Tap, instead of squeeze, since I’m having trouble releasing the paddles in time.
  • Squeeze Keying at Ham Radio QRP
• I started patching and compiling my own firmware for my Quansheng radios
  • building and flashing works
  • my minor change had no effect
• New R1CBU 0.22.0 firmware for x6100
  • whole firmware is like a new radio
  • minor fixes and conveniences
    • peak marger on S-meter
    • nicer scrolling on waterfall
• POTA by the Susquehanna River in Marietta
  • I heard some lighthouse events
  • I spoke to someone on a nuclear ship in Baltimore
  • I ran into a fellow ham and ex-professor from 25 years ago, Paul Ross, W3FIS.
  • It’s so quiet away from my normal desk of computers, I thought noise reduction was stuck ON
• 10m looking pretty open today to California
• I’ve been keeping the blog up-to-date, and I use this net to document my week.

Topics

• Jeff, W3JAM, is having trouble with an MFJ antenna analyzer that’s not being reliable compared to his other analyzers.
• Bill, KC3OOK, is preparing for the weekend’s antenna party.
• Jim, AF3Z, participated in the QRP Skeeter Hunt with his Penntech, 68ft of wire, and a tuner. 5W on 40M got him 25 CW contacts.
• Luke, KC3SCY, is building a transmitter from 1929.
• Tim, W3QP, is planning some hiking and SOTA in Virginia.
• Harvey, KC3NZT, was in PEI (I think) doing a little HF and listing to ship traffic.
• Question from Jeff, W3JAM: What is Supermon and how does one get started?
  • It’s a web-based interfacet to an Allstar node.
  • ClearNode app runs on Android.
• Question from Harvey, KC3NZT: In 120V wiring, does a voltage between 0V and 120V mean a broken or loose ground or common?
  • KC3RFG: Yes! The AC world is different from the DC world.

My Week in Radio

• Watching APRS
  • trying different radios/antennas w/ aprsdroid
  • slim-jim working better with any radio
  • watching logs and better-understanding the structure of the packets
• N3TWT repeater (South Mountain) looks good for “off grid” communication when camping in Cumberland county
  • heard lots of volunteer event activity
  • also heard N3FYI & N3KZ
• moving in September, so scheming new antennas
• maybe noticing a bug on AUBS firmware on Quansheng. I have copy of code to read and see about a fix.
• I tried another firmware, but missing the killer feature: scan on start

Notes from Others

• Everyone went to Kimberton Hamfest
• AF3Z, Jim: wait 30 years, and that shiny new radio will be affordable.

Questions

• W3JAM, Jeff:
  • using a generator, how important is ground?
    • KC3RFG, Jim:
      • already grounded if connected to home.
      • job site may require a ground rod, but doesn’t do much.
      • for field day, generator is the only “reference”, so no need for ground
      • modern generators have GFI built-in.
    • NA3CW, Chuck:
      • don’t let generator run down and stop under load, because it’ll degauss the residual magnetism
  • Heathkit SB102 w/ 6146B tubes. It wouldn’t tune up. is there concern with using 6146W tubes?
    • NA3CW, Chuck: 6146W is the ruggedized version. it should work. neutralize, and you’re good to go.
    • AF3Z, Jim: be sure to check the tubes with a tube-tester
• AF3Z, Jim:
  • cable management while being able to access and change. beat the rats’ nest. Are there good systems for cable management?
    • WA3VEE, Ron:
      • best if you can walk behind the desk
      • everything slides on felt feet, so must have some slack loosely coiled.
    • NA3CW, Chuck:
      • desk 90 degrees to the wall for easy access to the back.
      • garden velcro: can be snipped to any length you need.
    • KC3JAM, Jeff:
      • military systems require being able to get behind things.
• KC3OOK, Bill:
  • Has anyone used DragonOS / Linux?
    • NA3CW, Chuck: Mint, but not Dragon OS.