Re: RadI2Cino - I2C replacement kit for the uBITX Raduino Now with Teensy 3.6 adapter
#ubitx
jim I have an Arduino?nano in my Ubitx radio,? I have replaced the nano 328 board loaded ( BLINK)? to test it ok
but when I try to load in file Ubit_UI.INO? it stops at LCD_CREATECHAR? NOT DECLARED?IN THIS SCOPE?
I ACQUIRED?ARDUINO PROJECTS FOR AMATEUR RADIO? AND PROGRAMMING ARDUINO NEXT STEP??
BUT I CANT SEEM TO GRASP WHAT THERE TELLING ME.? NEW TO ARDUINO NANO WORLD.
ANY SUGGESTIONS? OR LINKS TO THE CORRECT FILE? NEEDED WILL BE GREATLY APPRECIATED.
ARTNS7E@...?
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Re: an open message to those unhappy with the volume of messages
#off_topic
The first computer I programmed and saw was the IBM 709 that belonged to the university of Florida.? 5000 12AU7s.? IBM didn¡¯t sell computers in those days but they sold this one to U of F.? The prof who taught the course told us that the computer was obsolete before it was sold.? Also the fact that IBM was selling it rather than renting should have been a tipoff to something not being right.? ? The first computer that I owned was a Heathkit H8.? Tape cassette storage at first and finally a disk drive and a DOS called H-DOS.? It was looked down upon by proponents of CP-M but it was better.? Hdos was stable and came with an assembler.? It was easy to program with syscalls.? Eventually ?Heath made a special ROM for the CPU board that would allow CP-M to run.? I ran it for a while and wondered what all the shouting was about.? I soon went back to HDOS and ran it until 8 bit computers were totally out of date and obsolete.? ? Regards. ? Max K 4 O D S. ? I've Never Lost the Wonder. ? Antique Electronics Site: ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of William Kimber
Sent: Thursday, May 10, 2018 6:35 PM
To: [email protected]
Subject: Re: [BITX20] an open message to those unhappy with the volume of messages #off_topic? My first sight of a computer was a Leo.? I think Leo II, every 3 months (? IIRC) they just changed all the valves.? About 10 feet long L shaped? couple of feet thick and four feet high. ? It used mercury delay line memory!!!?? Pre-core memory. Lots of big tape drives. ? There was also a Ferranti there as well but it was transistorised,? only about the size of large suitcase but more powerful.? The Leo's were specifically designed for a small number of repetitive tasks. ? On 11/05/18 03:02, Kees T wrote: I spent many hours watching the IBM ladies from New York restringing cores on core memory planes at NASA and punched some new TROS tapes myself.
73 Kees K5BCQ
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Doug KD9CYF wrote... Why would we only discuss the ?BITX on a list started
(and titled) about 14 years ago to discuss the BITX20?
</sarcasm> Just to get the coding correct, shouldn't that have been... <sarcasm> Why would we only discuss the ?BITX on a list started (and titled) about 14 years ago to discuss the BITX20? </sarcasm> Someone said... It already takes about 2 hours a day to read emails here. I'm currently 8370 un-read messages behind, plus another 3906 over on the QRP Labs list. I don't think I'll ever get caught up. My current strategy is to try and read just the most recent postings. Of course, if I skipped trying to read everything, I might get my uBITX put together one day! -- 73 Keith VE7GDH
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I have never worked with SMT and have no idea what size various components are. Could someone please enlighten me.
73 Bill WA8VIH/4
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Re: uBITX drive level..
#ubitx
I made the same change, R63 to 10 ohms and R65 to 4K7.? The weak SSB audio appears to be fixed!? I'm using the stock microphone element.? It was low before the mod,. I don't like dealing with surface mount but I was able to lift the old resistors and solder in new ones.? It's tight getting in there around the electrolytics, but with a good soldering iron and a magnifying lens it's doable.? I ended up buying an assortment of 1206 resistors on ebay because I didn't have close values in my spare parts.? I now have huge supply of 1206 resistors purchased for less than $5 including free shipping.
My next plan is to fix the weak 28MHZ tx power using the mod listed elsewhere.? I purchased some 1206 caps.? When they come in, I'll do the mod.
I'll be looking for some way to limit output power to 5W for QRP operations.? Maybe using a variable power supply with a slightly lower voltage.
Rich - KE1EV
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Re: Antenna Impedance Confirmation
Bill,
I can imaging the result of putting power to it.
Activating it with a push-button and relay switching it IN/OUT of the RF line helps and is "clean".
73 Kees K5BCQ
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"-You may route the positive power line through the ON/OFF switch on the volume control
The 2 tabs on the back of the volume potentiometer that come with the BITX40 kit are switched.
-Use another PA POWER line to feed power to the Power Amplifier. "
You have the option to wire your PA power to the same incoming source as the rest of the radio or feed it with a different power source --
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Re: Antenna Impedance Confirmation
I recall building a
little noise bridge, based on the 555 timer chip as I recall,
for the same purpose. Worked well until one day I forgot to
disconnect it before transmitting. I rebuilt it, intending to
incorporate it into my homebrew atu? but never got back to
that project.
As I recall that
would have been back in about 1979 and the original design
came from an ARRL Handbook from around that time.
Bill, VK7MX
On 11/05/2018 8:11 AM, William Cullison
wrote:
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Kees,
I'm fairly new to the BITX group and never heard of his idea.
Thanks for bringing it up again. I have always listened to the
background noise to do my rough tune but like the idea.
73 Bill WA8VIH/4
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Re: an open message to those unhappy with the volume of messages
#off_topic
My first sight of a computer was a Leo.? I think Leo II, every 3
months (? IIRC) they just changed all the valves.? About 10 feet
long L shaped? couple of feet thick and four feet high.
It used mercury delay line memory!!!?? Pre-core memory. Lots of
big tape drives.
There was also a Ferranti there as well but it was
transistorised,? only about the size of large suitcase but more
powerful.? The Leo's were specifically designed for a small number
of repetitive tasks.
On 11/05/18 03:02, Kees T wrote:
toggle quoted message
Show quoted text
I spent many hours
watching the IBM ladies from New York restringing cores on core
memory planes at NASA and punched some new TROS tapes myself.
73 Kees K5BCQ
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hello, everyone.. I want to ask about how to wire up bitx40.
In Bitx40 website ()
There is explanation about how to wire up the DC Power Connections.. Here is what the explanation says..
- "-You may route the positive power line through the ON/OFF switch on the volume control
- -Use another PA POWER line to feed power to the Power Amplifier. "
Can someone explain more further about this part? What will happen if I didn't use a potentiometer with on/off switch, just an ordinary potentiometer??
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Re: Antenna Impedance Confirmation
It's on Don's website at ND6T.com
I may not be able to get some sort of visual indicator attached to it but the basic circuit and how it works is on Don's website.
73 Kees K5BCQ
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Re: Antenna Impedance Confirmation
Where do I find the circuit?
73, Dennis
W7DRW
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Re: Antenna Impedance Confirmation
Kees,
I'm fairly new to the BITX group and never heard of his idea. Thanks for bringing it up again. I have always listened to the background noise to do my rough tune but like the idea.
73 Bill WA8VIH/4
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Re: RadI2Cino - I2C replacement kit for the uBITX Raduino Now with Teensy 3.6 adapter
#ubitx
Well, we NO LONGER have any of the Teensy 3.6 Adapter board kits. ?They are now all gone. ?Thanks to everyone who bought the kits.
Jim Sheldon, W0EB
------ Original Message ------
Sent: 5/10/2018 9:14:43 AM
Subject: [BITX20] RadI2Cino - I2C replacement kit for the uBITX Raduino Now with Teensy 3.6 adapter #ubitx
We still have some RadI2Cino (I2C replacement card for the Raduino) kits available and are sweetening the pot a little by including at no extra charge an adapter card that will allow the use of a Teensy 3.5 or 3.6 (preferrably the 3.6) to be used in place of the Nano.? This offer will stand until the supplies of TeensyDapter cards are exhausted and at that time it will be withdrawn.
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Antenna Impedance Confirmation
I'll make one more pass over the target................can't seem to get any interest on other threads.
As far as a quick and easy "Antenna Confirmation", I still like that little circuit Don, ND6T, came up with....and maybe others out there. Just a broadband noise generator and tune for the null with the receiver part of the Transceiver. No meters, no digital values to convert (which may or may not be correct) ....just a subjectively monitored "noise dip" as you tune the receiver while the noise generator is activated. If you are in the "dip", great, hit the PTT, ......if the dip is off frequency, just retune until it's on frequency. A bit different, a bit unusual, but very inexpensive and located under the covers of the BITX with no Nano code change required.?
Might be able to add a red LED to provide "null" feedback to reduce the subjectivity.?
I've discussed installing it under the covers (vs externally) with Don and he tried it on his BITX-40 and says it works well.?
73 Kees K5BCQ
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Re: I find this hard to believe.....
I was almost afraid to open the package because I was thinking I might find a small brick or something in it.
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Re: Thunderbolt and lightning, very, very frightening me
Hi Jerry, what you are describing is called a Ufer Ground.? Here in Olathe Kansas they are code.? Not sure but I believe it also requires all the rebar in the foundation to be tied together.
73, Bill? N0YUD
Concrete is apparently conductive enough.
A really good ground can be had by tying into the rebar (steel reinforcement bars)
embedded in a basement wall or the footing of a building or a concrete slab for a patio.
Something to keep in mind if ever doing new construction.
Maybe even worth digging a bit into the concrete of an existing structure,
assuming you don't compromise it structurally or create a groundwater leak.?
Jerry
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On Wed, May 9, 2018 at 08:25 pm, Robert Alexander wrote:
Just what does any of this have to do with the bitx or units radios
Who cares? It's a great trip down memory lane for many of us! ? -- John - WA2FZW
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On Thu, May 10, 2018 at 07:11 am, Jerry Gaffke wrote:
An important part of communicating better.
And I was always under the impression?that hams are always trying to communicate better! Did I miss something here? ? -- John - WA2FZW
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Re: an open message to those unhappy with the volume of messages
#off_topic
There are probably a few optimizations a human can make that would be missed by a compiler, but most probably aren't worth the effort. I've done that binary stuff and if you value your time at more than a penny and hour, IDE's are worth it.
Jack, W8TEE
On Thursday, May 10, 2018, 2:38:37 PM EDT, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:
Ah, you clearly missed the point.
All those editors and compilers and stuff are sissy too.
They were hand coding binary bits into those transformers.
Got us to the moon!
Haven't been back since.? ? ;-)
I've often heard from people who insist on coding in assembly, though not so much anymore.
And vaguely recall somebody advocating machine code as the way to go if you want to keep it really tight.
I very seldom find any reason to use anything less than C, even on small machines.
Jerry
On Thu, May 10, 2018 at 11:14 am, Jack Purdum wrote:
What? I think IDE's make life easier. Those who want to use discrete editors, compilers, assemblers, and linkers are welcome to it. I prefer to be a sissy.
?
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Jim Sheldon