Most Complete K7QO Code Course Version I Could Find: 614 files.

 

 Most of the K7QO Code Course files on line are the 131 file version and perhaps the 149 file version is still out in cyberland.

I know there are at least 4 versions of this code course.  The 131 file, 149 file, 514 file, and the 614 file version.  The date stamp is from 2006.  It includes several files along with the 614 mp3 CW files.  There is a gap in the files from 220 to 301.  I remember searching for the missing files from when I first downloaded this version.  Each one builds on itself with additional files.

I did not contact Chuck about the missing files.  Perhaps someone else has this version and can shed light on the missing files.

When Chuck's site still existed, I recall reading where he had expanded his course, but he stated he made a mistake in something.  I do not recall if that was the answers or the manual (that does not seem to change with the course revisions).

Since I could no longer locate the longest version of his course I created this post to the link for the .zip file.  The file is long, 352 MB zipped.  It could take 2 or 3 minutes to download.

 Typical of Google the link will open to a screen warning that the file is too large for Google to scan it for viruses due to its size.

 

K7QO Code Course, 614 files.

Dentron Jr. Monitor Manual, with Dentron addendum

                                                                        Manual

The file is scanned at 300 d.p.i. and google will not preview it in a browser window, you'll need to download it.

 I recently picked up one of these neat antenna couplers.  I've read about them and wanted to find one for myself.  My main interest is in comparing to MFJ and other cheap but expensive units.  

First thing I noticed is like all Dentron antenna couplers, much better quality in components and assembly.  

First there is more space between the inductor and cabinet. Second the plate spacing of the capacitors.

The one commonality that I have found with Dentron and MFJ is that the capacitor knobs are indexed backwards.  Minimum capacitance is 10 and maximum is 0.

I first noticed this when I purchased my first MFJ coupler. In over 30 years as a broadcast engineer and a technician before that I never saw minimum settings of anything at MAXIMUM and maximum setings at MINIMUM.  Except on MFJ and Dentron.  Maybe there are others, and I have not found them.

Maybe that is why MFJ and others tell people incorrectly how to set their antenna coupler.  Instead of maximum capacitance on 160 & 80, and about 75% of full capacitance on the mid bands, and 1/2 capacitance on 20 and above they just tell everyone to set them 1/2 way and let you be confused when you think your lowering capacitance by approaching 0 and increasing it as you approach 10; in reality you are doing the opposite.

Not only that if I would have designed machine control systems like that there would have not only been many confused operators and confusion on the production floor, hazardous operation would have been created.

As for the rest of the unit, I found what everyone else that posts on these notes, is in the design a second toroid was added for 160 meters.  That seems to be the weak link for 300W.  I don't like tiny wire.  If it ain't made to survive full rated power at A.M. it's junk.  I'm as stubborn that way as those who like to call MFJ mighty fine ......

In actuality, if it works it ain't junk.  Things that work, work.  Just some things are built to better quality standards than others.

For the Manual.  There seems to be only one .pdf of this manual on line.  No problem with that.  I post this one because my Jr. Monitor came with a manual.  The manual is a bit wrinkled, but it scanned ok.  

What I found interesting is that Dentron changed the initial settings with an added sheet. 

What else I found is that some of these units had the toroid and some did not.  Some of the units had the ground jumper for the toroid and some did not.  It also is not in a before or after certain serial number.  Search on line and you can find low serial numbers with the toroid and jumper binding post and higher serial numbers without.  I have not yet found any with the correct spelling on the label (MONITER).

So if you remove and reinstall the capacitor knobs the charts are null and void.  Anything Dentron states set to 0 just set to 10.  4 will become 6.  5 will stay 5.

As for operation, this thing works like a charm. I was able to match 80 through 10 on an end fed wire and on a dipole.  I could match 160 through 10 on my vertical.

Worst case SWR was 15:1 and 12.3:1 on the wire antennas measured with a RigExpert AA-55 Zoom.  Same antenna measurements after the Jr. Monitor match were all less than 2:1.

Vertical antenna worst SWR was  18:1 on 160m which matched 2.2:1 and 2.6:1 after the Jr. Monitor.  

Loss? I did not measure antenna current or field strength, but I did make CW contacts Friday and Saturday night to CA and OR as well as the U.K, Germany, and Italy all QRP.

I used 25W on SSB throughout the USA the same 2 nights.

Since MFJ has ceased production we may not get many new (only what is left in stock) MFJ anything, but for years there will be used on the market.

2024 Field Day

I don't keep up with this blog.  There's a lot went on since my last post.

Radio restorations.

Vibroplex restorations.

Antenna experiments. 

And Field Day.

I didn't post anything from last year's Field Day.  

Seems each Field Day gets better with the peaking of the solar cycle.  I like running QRP rather than going to the club Field Day site or working Class 1D as I did one year.

This year I used a compromise antenna. During the day I used a hitch mount telescoping 18 foot vertical mounted on a Palomar 9:1 unun on a trailer hitch on my truck.

Saturday night I changed to a Sigma-Eurocomm SE HF-X80 vertical on a military mast hitch mount using the stock unun that comes on the antenna.

The HF-X80 did better on 80 Meters and even had low SWR across some of the 160 meter band although I do not use 160.

Soon after the start my PC quit.  Died.  R.I.P.  I did the event using paper logs rather than wasting time with a Windows PC which I think was a hardware failure  rather than the OS for a change, but not repairable in short time.

 

Yaesu FT-450AT set to QRP powered by a solar charged battery pack, and Ten-Tec 247 Antenna Coupler to match the antenna. 

Soon after the PC failed and I made a contact or two, we got rain.  I initially set up outside since I set up my portable QRP set up or another rig that I can reduce RF power to 5 watts output. Now I moved into the garage and set up on the work bench.

Saturday was fine for 5W phone.  Saturday evening I decided to try the HF-X80 and put it up.  Thunderstorms.  Took the antenna back down for safety and did not operate during the overnight storms.

Sunday I decided to use the HF-X80 since it would be the first time using this antenna.  I usually use a Mosley RV-4C with counterpoise since it is such an easy antenna to set up and use.  I wanted to try something different this year.

Solar panels and the HF-X80 installed on the hitch mount. Used a small board over the choke balun to protect the connectors from rain.  Yellow thing across side walk is a cable ramp to protect the coax and prevent tripping over the coax.

 

 

There was quite a bit of activity on Sunday and the set up performed better than expected.  Not as good as using a Mosley antenna, but good enough to score more contacts than 2023.

I monitored the Solar controller to see if it would ever switch to battery power since I did not operate at night this year.  I operated from about 1900 Saturday until 1800 UTC Sunday and never used any battery power; all solar.  Next year I may get a new set of panels that are not as large and still as powerful.

I like setting up and operating from outside.  Portable set up is fast and easy. Fresh air and sun and shade, but rain...that forces me into the garage.  Thundershowers and thunderstorms shut things down.

Front Yard Portable for Field Day 2020

It is an understatement to say Covid-19 has thrown a monkey wrench into the gear works for 2020 (and probably the next few years), but the stay at home orders have enabled many of us to get to projects we otherwise may have never done.

One of those projects for me was to use what I have and get on the air QRP for Field Day.  It has been something I've wanted to do ever since getting my license.

In Florida however, I had to many irons in the fire with the both local ham clubs and always worked Field Day with a club -- or two.


After trying different wire antennas, and trying to keep them hidden due to antenna restrictions I decided to give the Hy-Gain AV-18VS a go.

I only ordered it 2 weeks before Field Day.  It arrived about mid-week before Field Day.  Just enough time to get it ready.

I also located a Mosley RV-4C on Craigslist.  I checked it out.  The price was right.  I brought it home, cleaned it, replaced some of the CAD plated steel hardware with stainless steel, mounted it on a speaker stand and tested it.

Out of curiosity I wanted to see what the bands looked like without a counterpoise.  Bad.  Nothing under 2.5:1 VSWR except for a small part of 20 meters fell to about 2:1.  I did not expect it to do anything without radials; it's a vertical.

Four cut to band length radials were included with the antenna. I fastened them to the base and strung them out in the yard and over the wood railing of our deck and ramp.

All 4 bands less than 1.5:1 except 40 Meters.  The band ends increased to between 1.7:1 and 2.0:1 VSWR.  Still very useable, and nothing to adjust.

I decided to verify the bands and brought out my HP 4815A.  This showed resonance across most of the bandwidth of the bands.  I'll be doing some more analysis of this antenna and the AV-18VS once the weather cools.

What I like about Mosley antennas is their great quality and easy assembly.  I've used commercial Mosley antennas in the past, and the amateur radio antennas are just as high of quality.  The RV-4C is the only vertical that went together and on the air without tinkering with section lengths, trap adjustments, add radials, etc.  They work out of the box.

I set up in the yard until I had to move to the deck to get some shade.

Simple and quick set up. I used my IC-70kMKIIG on low power.

I operated QRP so what I got from the Icom is what I used.  Next highest power setting was 7 Watts.

Tower of Power.  A Mosley RV-4C on a speaker stand.  Orange flags are on the counterpoise wires.  Counter poise wires are suspended by attaching the ends to fiberglass driveway markers.

The tidiness did not last long.  By Saturday night I started collecting other things, and by Sunday morning this is what things looked like as soon after sunrise that I had enough light to take the image.

Overall this year's Field Day was quite a bit of fun. I did not make hundreds of contacts or thousands of points, but I did have fun.  To me and many of the hams I know that is what Field Day is about: Fun.  We all like to make as many contacts as possible and earn as many points as possible, but no need to make the week end a burden.

The AV-18VS was installed at the end of the yard behind the deck.  It would be to the top right of the RV-4C in the image of that antenna. I kept it retracted during the day and extended the sections only at night when I wanted to use 80 meters.

For power I used old handicap scooter 12 V, 18 AH batteries. I had 2 wired in parallel and they carried the entire week end.

I've had good results saving the batteries when they get changed out of my XYL's scooter and chair.  I worked several hurricanes in FL using only one 12V 12 AH battery and my HT.  I also worked several hurricanes with my jump kit on one 12V 18 AH batteries same as the two I used in the above image.  Usually a hurricane passes in about a day although one lasted about 3.  I had a generator, but batteries are much quieter. 

Getting a Hy-Gain AV-18VS Ready For Field Day

Review of the AV-18VS is after the images.

I've never been active with this blog, and keeping to that tradition, it's been over 3 years since my last post.

Since the last post we moved from Florida to Michigan.  We chose a quick to purchase and occupy house that would be handicap accessible and we could pay it rather than mortgage one.

Our plans were to casually search for a house that fit our needs, and be in it in about 3 to 4 years or sooner.  Covid-19 put those plans on hold.

2020 was going to be our year.  We will wait.

Because of where we live I am restricted to what antenna I can install.

I worked Field Day 2018 from my home station with a multiband mobile antenna mounted on the rain gutter and grounded the down spout.

That arrangement at least got me on the air.

2019 Field Day I installed a random wire.  Bands were dead.  I planned to work QRP.  I did not do Filed Day 2019.

Field Day 2020.  Goal was all week end QRP on batteries.

I wanted to work 80 meters over night this year so I bought a Hy-Gain AV-80VS. Not much of an antenna and only about 1/16 wavelength on 80. I like messing with short verticals.  This antenna is also quite stealthy compared to the AP8A and many other 24 foot and taller verticals.

Not all that much to get a Hy-Gain AV-18VS put together and mounted on a metal pipe driven into the ground.  The coil is the problem.  See photos.

Out of curiosity I tried the antenna without radials.  As expected VSWR of 3:1 or greater on every band.

Clipped 4, 67 foot long radials onto the antenna base and laid them out in the yard.  Surprisingly most of 80 meters was 2.5 and under with a 1.3:1 dip at 3.25MHz to 3.60MHz.  Suits me.  The old Novice section of the band, and my CW is not all that good. If I do any CW I'll be fine.  The band from 3.60 to 3.75 was about 1.4 and 1.5:1.

I tweaked the antenna by moving the coil tap around and was able to move the VSWR dip a bit higher on the band.  I now had a 1.2:1 dip at 3.62MHz, and a useable 1.4:1 on the Novice frequencies.  I did not measure grater than 1.5 until 3.87Mhz and VSWR was still only 1.7:1 at 3.90MHz.  Plenty for what I expected to do on 80 for Field Day.

Sorry for the bit of blur.  The first thing about the Hy-Gain AV-18VS is the cheap quality.  I can live with the tubing, but the coil could be better built.  As it is if even the correctly sized clip were shipped with the antenna I'd be ok, but the clip is for size 14 wire and the coil is made of  16 or 18 gauge.  Time to order the correct, and much better quality, clips from DXE.  Both clips are screwed together tightly as possible.  DXE on left, Hy-GAin on right.

This is how the clip is properly attached.  No shorting adjacent turns, and fits tight to the turn to which it is clipped.

Good Quality DXE clip on the left. Poorly fitting MFJ clip  on the right.  MFJ owns Hy-Gain.  I am familiar with some pre-MFJ Hy-Gain antennas when the tubing was heavier and better quality parts were used.

Clip supplied with the antenna does not fit tightly no matter how hard the screw is tightened. It is also difficult to not short to an adjacent or both adjacent turns.  Compensation for shorting adjacent turns can be done by relocating the clip to a point where the antenna is resonant or low VSWR, but the clip must be able to be fastened tightly to work reliably.  The tip of the clip is not what is tightened to the coil. It is the part formed for the wire, and it is tightened as tight as possible.  It is loose enough it will fit the turn as seen.

DXE on the Left, HyGain on the right.  Notice the supplied clip shorts to both adjacent turns.

 On a different subject:

The AP8A top section got damaged by the movers. I bought a new tube from DXE, and some of the DXE Guy Line Caps.  I have not installed The AP8A, nor did I plan to use it on Field Day if the Hy-Gain worked.  The Hy-Gain arrived a few days before Field Day.  I had time to check it out.

DXE has much better quality tubing than even the original pre-MFJ Cushcraft tubing.  New top section DXE tubing is inside the next to the top section on the left.  The original AP8A top tube is on the right.  0.03" wall compared to 0.05" wall of the DXE. 

Back to the AV-18VS coil.  I worked with thousands of tapped inductors made from wire and flat edge wound on commercial A.M. transmitters, antenna base coupling units, and phasors.  So the el-cheapo Hy-Gain in a way was no surprise considering it is made for ham radio and by whom it is made.  Seems hams over pay for low quality equipment in many ways.  This coil could be made of heavier wire, spaced nicer, and the clip correctly sized for what the antenna costs.  As it stands this antenna should cost about $75.00, and perhaps even include shipping.

The tubing walls are thinner than that of my Cushcraft or Mosley verticals.  OK, they are taller so they need heavier walled tubing.  Still if the AV-18VS is permanently installed it must withstand wind and depending on location, ice.

The entire base could be better designed to house the coil, and several correct clips could be included with the antenna for easier band changing.

Alternatively the coil could be made like some of the old mobiles with plug in taps to jumper to the correct band.

Finally the base quality is very poor quality.  I worked with first day apprentice machinists that knew enough to break burrs, sharp edges, and smooth all rough edges on stamped metal parts.  None of that was done to this base.

First thing I did when I unboxed the antenna was see the unfinished base. I got one of my smooth files and removed all of the sharp edges and burrs from the base.  Next step was to clean all the holes with a de-burring tool.  Then I was ready to assemble the base. Everyone who does this should charge MFJ to complete the work their shop should be doing. I'm sure if we all charged them $50.00 to de-burr their bases they may ship quality product.

Assembly was simple and straight forward.

Finding the correct tap was easy.  Locations are approximated in the instructions and I found them not to be far off.

I did shorten the jumper lead and installed a DXE clip.  There is no need for the jumper to be as long as what is supplied.  Half as long is more than sufficient.

I only set the antenna for 80 meters.  Results were ok.  I did not work as long into the night as I planned.  Took a nap and resumed again about 0300 EDT Sunday.

Changes I plan for the AV-18VS is test is without the loading coil with my AH-2 which should match the antenna quite good on all bands to 40 meters.  I may need to add a top hat for 80 meters.

I also plan to place clips on the antenna coil as presently built.  I can use short clip leads to clip to the 80M tap and to which ever other band I choose.  The idea is to be able to field deploy this antenna for portable operation.

Meuller #45 clips work quite good for clipping the radials to the base and having a few short jumpers with one on each end can be used on the coil taps.  Rather than moving a clip, let the coil tap clip attached and use clip leads.

When the weather gets a bit cooler I'll do all the bands as well as add an SO-239 to the base. The base is already punched for one (Thanks MFJ/Hy-Gain).
The challenge is to neatly fish the coax through the base tube and out to the coil and base.  Could be as simple as a grommeted hole for RG-8X or an enclosure for the coil too.

Would I recommend the Hy-Gain AV-18VS?  Sure. Considering the cost of other antennas this one is ok if you don't mind manually changing bands. There are ways to work around that.  Those ways will need a post of their own.

Is the AV-18VS worth the price?  Well, those who know me know I'll say no because I think all amateur radio antennas except a few are way over priced.  So much so I have yet to purchase a new one except for the AV-18VS because it is perhaps the cheapest vertical on the market.  Cheapest price-wise, and the cheapest quality-wise I've seen.

Now speaking as strictly a ham radio operator. I know what is out there.  For the price you won't find another antenna this nice.  Put it together and put some radials on it and you have an antenna that will cover from 10 meters to 80 meters. No other antenna for $150.00 will do that.

The AV-18VS can be ground mounted, pole mounted with a counterpoise, or roof mounted with a counterpoise or tuned radials.

The AV-18VS is small enough to be easily raised and lowered in an antenna restricted location.  It may even be small enough to be left up ground mounted in the bushes or even the yard or on beside the deck, and there are probably other places.  As long as a few radials can be laid the antenna should work.

This is the kind of antenna one can experiment with.  Build your own coil and test it.  Add a top hat.  Instead of a top hat try adding a wire. Instead of radials, a counterpoise or a ground plane.

Beware though if you buy one (and maybe other Hy-Gain, Hustler, or Cushcraft antennas) be prepared to de-bur the base.

Kenwood TS-830S Station.

I started my Kenwood station in 2010 with one of my dream radios, the TS-830S.
When I first got my General I searched for my first rig.  I did not know exactly what I wanted. I did like all the Kenwood line especially the TS-530 models since these were more in line with my budget.  I really liked the TS-830 from what I read and what I was told by local hams.

I saved some money and started shopping.  I bought my first rig in 2006, a Yaesu FT-101ZD. It did all I wanted.  It was owned my one of my Elmers.  It cost less than a Kenwood on line.  Even though I like the FT I still wanted a Kenwood.

In 2010 a friend who also was in the same radio club where I belong decided to sell his Kenwood TS-830S.  It only took me a few minutes to get to his house and try the radio.  A trip to the house for the money and I had my start to my dream station, a TS-830S.

After I became familiar with using this radio I decided to buy some of the other accessories with the intent to complete the Kenwood station.  I even hoped to get a TL-922.

I used this for SSB and CW with a straight key.  I have several straight keys that I use including a twin to the one I am including in the sale.

Here are more photos:

This is the entire station.  The black objects in plastic bags are original Kenwood riser feet.

TS-830S with optional KB-1 knob.  Not sure if it is a Kenwood or K4EAA.

Rear panel.  Kenwood does not have a way to decode the serial number for date of manufacture.

 Most of the date codes on the ICs are mid-1986.  Those are the only dates I could find.

Carrying handle is in great shape.  Does not make the radio work any better.  It does make it look better.

This is the scratch I mentioned in my for sale post on Ebay.

All the filters are installed and work properly.

AT-230 Top.  There is a small scuff mark.

More pictures are available on request via email showing output power.

I will also be listing more Kenwood amateur radio equipment as I have some duplicates of some of my equipment and some equipment not shown on the first photo.

73,
Bill