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Re: Tuner? Well Sure!
¿ªÔÆÌåÓýI am available as a Beta tester as well. ? v/r Fred W4JLE ? ? From: [email protected] [mailto:[email protected]] On Behalf Of Paul Schumacher via Groups.Io
Sent: Sunday, December 31, 2017 15:43 To: [email protected] Subject: Re: [BITX20] Tuner? Well Sure! ? I am willing to beta test. ? Paul K0ZYV ? From: Steve Black via Groups.Io <kb1chu@...> ? ? On 12/31/2017 11:26 AM, K9HZ wrote: Well my company will manufacture the tuner, but i will need a bunch of beta testers to work any bugs out. ? ? Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it: ? email:??bill@... ?
?If you guys make this happen, I'm going to be rather amazed.? ?Even if it merely does a clunky search search search algorithm in the beginning...... ? It can later do the intellituner thing with the smith chart type calculations.? ? ? I'm able to actuate my MFJ 993B intellituner easily on 80 meters and usually on 40 and sometimes higher with my uBitx running just 12 volts to the finals and doing digital.? ?But that thing was about $270........... ? As Ashhar pointed out....someone should form a company.? ?Crowd-fund it if you wish.? ? Get printed circuit boards.? (I even learned how to do that!)? ?think about how to make sure it works for every possible mode & application..... ? For scanning systems like WINLINK, it would be wonderful if it could move to memory positions on RECEIVE (which means the VFO has to output something, or you have to use a frequency counter to watch it) ? For ALE, the freuqncy changes are TOO FAST to follow with relays. ? Cheers. gordon ? ? From: [email protected] <[email protected]> on behalf of Jack Purdum via Groups.Io <jjpurdum@...> ? I agree with Rod...it should have its own Nano. The issue really isn't the processing power, but the ?BITX I/O lines are pretty scarce. Plus, you can buy the Nano for $3, so why not? Finally, it would make the software development a little easier since could be run "alone" during testing. ? Jack, W8TEE ? From: Rod Self <km6sn@...> ? William, On 12/29/2017 07:05 AM, K9HZ wrote: So after finishing up most of my projects a few days ago¡ I really needed something to do¡ so I put on the drawing board¡ a 100w automatic tuner that can work with the uBITx (intended to go inside the same case actually) that provides power, SWR, band memory for same antennas, low power tune, bypass, etc. all in a kit form for about $30.? I¡¯m prototyping the think now and will work on the tuning/communications code (to integrate into the Raduino) shortly.? I¡¯ve contacted a few of you off-channel to work out some protocol/communication issues¡? but Stay tuned (double play on words there)! ??? ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: Like us on Facebook! ? ? email:? bill@... ? From: [email protected] [mailto:[email protected]] On Behalf Of Gordon Gibby ? Good pickups! ? So the ALE (automatic link establishment) crowd, much like the WINLINK crowd, tend to use LOTS of bands....and thus they find ways to make their antenna systems work on mulltiple bands.? ?Here are some of the most popular ways: ? 1.? ?Fan Dipoles (time honored technique of tying multiple dipoles together at the CENTER, and the energy tends to go to the correct one, since all the others present much higher impedances.? ?The wires "fan" out with usually wooden spreaders at the? end and some string involved to keep them somewhat separate.? ?Been there done that many times, my college ham club has a 3-band unit up on the top of an 11 story building rightnow that I built for them.? ?Build for yourself, dirt cheap.? ? 2.? Auto-tuners? --- everyone makes these now and many can tune as soon as they see RF, or even return to previous settings that were memorized.? ?LDG,? and others.? ?Low power versions for $100? ?End fed wire to balanced line fed dipoles---they work with lots of different kinds of wire.? ? 3.? Inherently multiband antennas:? ?example, full wavelength loops.? ?Build for yourself.? ? ? 4.? Carefully tuned end-fed transformer-fed antennas --- there are now several of these on the market and they give an acceptable SWR on mulltiple harmonically related bands.? ?Tend to be close to $100 ? 5.? (the one I dislike)? resistively terminated folded dipoles --- these use a resistor to make up for what a folded dipole can't create and give an SWR that is "acceptable" literally across EVERY FREQUENCY in a decade of frequencies.? ?3-30 MHz.? ?The tradeoff is loss, as much as 10 db at times.? And they generally are pricey. ? 6.? There are some multi-band vertical antennas on the market that are basically vertical fan dipoles, but scrunched up in a nice package.? ?An elderly ham in my city has one, 32 feet tall....a gang of us put it up and doggone it does from from 40 meters all the way through 6 meters ? ? And there are probably many more.... ? Gordon From: [email protected] <[email protected]> on behalf of Arvo KD9HLC via Groups.Io <arvopl@...> ? An automatic tuner protects the rig during TX.? If the SWR is bad during TX, some of the signal coming out of the transmitter is reflected by the antenna back into the radio where it can cause damage. ? ? ?
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