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It is fun to build and even more fun to operate. Attached is photo of 5W20 for 20m, S/N 001 as Diz has S/N 000. He used PCB#1 series and I used PCB#2 which is a production board before a couple of minor cosmetic adjustments. I built this rig using only a schematic. Diz sent me two of the binocular transformers used in the driver and final PA sections. I used all the other parts from my own stock, so the photos will reflect some different parts that you will see in the kit when it comes out in July. Watch the home page of kitsandparts.com for release details. Diz will post on the 1W + 5W reflector. Diz and I exchanged a number of emails and phone calls to get things worked out for you guys and girls. I will release a 200 page PDF build guide sometime after Jun 1. Build and test. I'm fine tuning the manual in the next week and will have Diz review it before final release. I will not be doing videos like I did for the 1W. Not worth it for only 100 people seeing them. I took a photo of almost every part installed, up close and personal. The 5W is a 1W on steroids. The setup you see on the workbench was the final tuneup before making an enclosure (also in the manual). I did the enclosure Saturday in about an hour at lunch time as 20m was dead as a door nail at this QTH. Only a couple of signals heard. Took the rig to my local park 1km away at sunset when the band opened up. This to test my new GPS gel cell you see in the photo, 9AHr 12V bought at the local Gruber plant for $15 and some change. Ran only 4W as I had added a small heat sink to each PA transistor and need to run some more tests before going to a full 5W. I did not want to start an exercise and lose power to the antenna. I worked 52 Qs, 22 states and 6 1E stations. I am glad that I installed the optional CW speed pot. Helped with the wide range of CW speeds. Good to see the new operators on the night shift as the old guys work days and then take a long nap. :-) I'll give a more detailed review in July for your consideration. I used 3-pin 2.54mm headers for the PA finals. Figure they will blow if SWR is high with the higher power level involved. I have several experiments to do in the next few days on the PA section. I added a heat sink with epoxy to each PA transistor after the photo was taken. The kit will use a nut and bolt system. I also recommend a digital display and a 10T pot as the rig tunes a large range on 20m. I'll show a photo of the enclosure in a day or two after the paint drys. Used the bare aluminum enclosure at the park as I knew what everything was. :-) We have a sail covered table and bench with water cooler and restrooms about 10 m away. FYI chuck, k7qo, 22 states to new WAS on 20m at new new power level for me. 1 country down for DXCC.

When designing a broadband transformer, there are several parameters which can be adjusted for an optimized frequency response: Increased coefficient of coupling, decreased leakage inductance, can be achieved by placing the primary and secondary windings closer together. While keeping winding to winding capacitance at a low or optimal value. Ferrite core loss is reduced by increasing the primary winding inductance. While keeping secondary inductance and wire length in range for acceptable leakage inductance and bandwidth. A set of compromises are demonstrated here: https://www.kn5l.net/kn5lEfhwUnun/ Core size, stack of two FT114-43, and primary turn count, four turns, is selected for a Ferrite core loss of about 0.3 dB in the HF band. Two secondary ratios are shown. The secondary turn counts are selected to maintain minimum leakage inductance. The primary windings are interlaced within the secondary windings to increase flux coupling between the primary and secondary. Increasing coefficient of coupling. The location of the primary winding with respect to the secondary winding is selected for optimal winding capacitance. The capacitance will aid in canceling the leakage inductance. The frequency response with the above adjustments is very flat through the 3.5 to 28 MHz HF band. The device enters resonance conditions above about 40 MHz. John KN5L

Gents, In advance of FD, I "inherited" a deep-cycle marine/RV battery and wondring if it's met its maker. Ostensibly in good condition (so sayeth the donor), it's been on an automobile battery charger for three days drawing about 5-6 amps with a terminal voltage of 9 volts. I did the research but a lot of the info is "buy our miracle charger" or "revitalize your dead batteries with our wonder product", etc. Any verdict on this; a few more days? -- William, K6WHP "Cheer up, things could get worse..so I cheered up and, sure enough, things got worse!"

I'm wondering if someone can suggest a method, not involving using an antenna analyzer, to gradually construct this antenna so that it matches on all three bands? I began by putting it together with the measurements suggested in the manual, and it didn't match at all on 20, and barely on 30. Then I started again, tried a piece for just 20, got a match. Added a piece for thirty, and Trap A, and got a nice match on 30 - but no match on 20. Help!

Had a unexpected car repair and need to move a few things out of the shack. I have the following all built by me. Norcal 40A 10T-Pot, Solid 3w out tuned for 7.025-7.070ish at 690Hz with built in Touch keyer 4x100char memory with jackyack software. 100$ Shipped Ultimate3S kit with GPS, 3x bs170 finals installed and filters for 15/20/30/40/80m bands factory reset. 100+ in parts asking 110$ Shipped wired stock for 5v. Hilltopper20 with LCD mod installed with 3D printed mount. asking 115 $ shipped HobbyPCB RS-HFIQ 5W SDR with IQ Keyer: comes with cables for audio and pc usb, sold new north of 350$ yours for 275$ Shipped. Deluxe TennaDipper Custom enclosure 50$ Shipped More pics for e-mail please contact direct/private gud on the zed Paypal preferred. 73 -- N8DAH Shop.Kit-Projects.com ( HTTPS://Shop.Kit-Projects.com ) Kit-Projects.com ( http://Kit-Projects.com )

All: Conditions were not ideal, but we did get some RBN reports. While it's far too soon to say much, it appears the mag loop gives up about 1-2dB over the EFHW, which is up about 60' or so. VE8JY in Alberta heard us, but looking at their antenna system, they can probably still hear Jimmy Hoffa's last conversation. Also, we did get some rain during the test period which forced us to stop for a while. We tried to protect the cap, but were not totally successful. We are going to try again after we iron out some hiccups that showed up during the test. We also need to put it in a protective case. About the design. The feed loop is rotatable (by hand right now), but we do not think it's worth the effort to motorize it. The software driving the cap via a stepper motor works pretty well, but we think we can refine it somewhat. We are about 50' away from the ML and the control aspects seem to work just fine. Why the 4-loop construction? Because we wanted to be able to fit the loop in the truck of a car without killing the efficiency. True, it's not an Alex loop, but we didn't intend it to be. On the other hand, it's going to be cheaper than most portable antennas and it can handle considerably more power than most. We have more tests in mind down the road, but we are encouraged by the results. To all of you who tried to give us a listen today, Al and I very much appreciate your efforts on our behalf. Jack, W8TEE