Keyboard Shortcuts
Likes
- BITX20
- Messages
Search
Analog Smeter
#smeter
Just for fun for 15€...
On my first Bitx40 i added an analog smeter with simple circuit on audio line and a 500 microA vu-meter. Al was fine except that without AGC it is just a signal level. On my Ubitx i add a Chinese Audio Vu-meter that is better... Around 15€ with a circuit and 2 vu-meters. And with the input circuit it is just like an AGC. For fun i have nice warm lights.. And for the same price you have another Vu-meter and a second input.... sevral shops in China. For axample: (the hole in front panel is not perfect. I am going to make a new panel...) Radio is magik ! 73 Jean-Luc F6HOY |
Re: Bitx40 75KHz Spurious, How to solve it.
#bitx40
Dear Jerry aa1of, The modification for suppress the spurious of this time is as follow. 1) Add 3.3uF electrolytic capacitor and 0.1uF x 2 bypass capacitor to VCC line of Arduino board =>PIC1-1a? PIC1-2a |
Re: #ubitx-help Strong Audio Tones in and outside audio receive passband
#ubitx-help
Hi Jack,
I haven't seen other tested options and if my memory serves me right, that worked for two units. Not a fun exercise in my opinion. Good luck, 73, John |
¿ªÔÆÌåÓýThis is ingenious.? With the low price
of arduino clones, this makes a lot of sense.
Mike ZL1AXG On 4/07/18 12:50 AM, Tom, wb6b wrote: Hi,
|
Re: Easy, Inexpensive Cooling Fan, Excelway Case
¿ªÔÆÌåÓýWell the good news is that is not how
it works.? It works in semi-break-in mode, where the TX mode only
goes back to RX with a reasonable pause in sending characters
(adjustable in the menu).?? You should be fine in connecting the
fan to the TX voltage line.
Mike ZL1AXG On 4/07/18 9:42 AM, Arvo KD9HLC via Groups.Io wrote: On Tue, Jul 3, 2018 at 06:46 am, Gary Anderson wrote:
|
Re: Hijacked: C vs C++
Oh, that reminds me.
toggle quoted message
Show quoted text
Scared the crap out of me to have to walk through the barn on my way to? the outhouse after dark when I was about 5. Perhaps I had seen The Wizard of Oz or something, but specifically remember lions as a major source of fear. All right, we must bring this back on topic. Too bad Dorthy didn't have a Bitx with her? so she could reassure the folks back home that she was ok. Though come to think of it, I guess she wasn't ok, and it really would not have been of much use to her... Jerry, KE7ER On Wed, Jul 4, 2018 at 08:12 pm, Arv Evans wrote:
|
Re: Hijacked: C vs C++
Most old timers have several war stories regarding how things were in the bad old days before computers and toilets had been invented.? 40 years from now today's youngsters will be telling their own war stories about how bad things were in the early BITX days.? They too will feel justified in off-topic posts because it is part of their own history.? _._ On Wed, Jul 4, 2018 at 8:40 PM Jack Purdum via Groups.Io <jjpurdum=[email protected]> wrote:
|
Re: Hijacked: C vs C++
Jack Purdum
When I was doing my dissertation research in the late 60's, I too used the 80-column punch cards on an IBM 360. I was doing a lot of stepwise multiple regression, but I remember dropping my cards into the hopper and walking over to the printer just as my output was being spooled out. I finished up my research where I took my first teaching job, which only had an IBM 1130. I was still doing some final runs and dropped my cards into the hopper and walked over to the printer to catch my output. Nothing... I told the systems tech that the system crashed and I didn't get my printout. He glanced over at the main console and said: "Everything's fine...it's thinking... Jack, W8TEE
On Wednesday, July 4, 2018, 5:04:15 PM EDT, gw0div@... via Groups.Io <gw0div@...> wrote:
Ah!! The days of the DEC 20/60 and VAX11/740 with IBM 29 card punches!! And the joy of COBOL! Rhys? GW0DIV? |
Re: Hijacked: C vs C++
¿ªÔÆÌåÓýWhen I was attending USF back in the 70s, the system and four
mainframe printers (the old ultra-high-speed drum printers) were
in the room where we submitted our punch card stacks.? They
routinely had several huge packing-crate boxed of tractor-feed
paper behind each printer - all connected together, and it would
print out a page (lots of text) in a couple of seconds or so.? One
day I saw one of the funniest sights I've ever seen connected to
computers - somehow all four printers had been put into full
page-feed mode.? The paper was flying vertically out of the top of
the printer and hitting the ceiling above it (all four printers),
first it would pile up against the ceiling and then fall forward,
then backward.? The sysop for that day was in the back of the room
running around in a little circle while shouting "Turn it off!?
Turn it off!!! Turn it off!!!" - and although they had everything
shut down in less than a minute - the area behind the counter was
waist deep in loose printer paper.? It took them (as I remember)
at least a day to get everything cleaned up and back in
operation.? (We had to come back a few days later with our cards.) I had one of those printers, along with a mainframe given to me several years ago, but could never find the right adapter or terminal to use them... and the Florida humidity got to them and ruined them.? I forget all the specs now, but it had for it's day a huge hard drive, a fast high-capacity platter drive, and SCSI connectivity (except you couldn't program through the SCSI port). On 07/04/2018 04:49 PM, Clark Martin
wrote:
|
Re: Hijacked: C vs C++
Jack Purdum
That's why you see "Hijacked" in the subject line. Jack, W8TEE
On Wednesday, July 4, 2018, 8:27:05 PM EDT, Robert Alexander <ralexander22@...> wrote:
I don¡¯t see anything about the BITX or UBITX radios in this thread. ? 73 Robert (N5RHA) ? ? ? From: [email protected] <[email protected]> On Behalf Of Jerry Gaffke via Groups.Io ? Forty years ago, programming might involve typing into an ADM-3 terminal 'Twas midnight, and the UNIX hacks Did gyre and gimble in their cave All mimsy was the CS-VAX And Cory raths outgrabe. ? "Beware the software rot, my son! The faults that bite, the jobs that thrash! Beware the broken pipe, and shun The frumious system crash!"
|
Re: #ubitx-help Strong Audio Tones in and outside audio receive passband
#ubitx-help
Is replacing the Arduino?still the easiest way to fix the 13kHz tone in the headphones?
Jack KG4GJY |
Re: Hijacked: C vs C++
¿ªÔÆÌåÓýI don¡¯t see anything about the BITX or UBITX radios in this thread. ? 73 Robert (N5RHA) ? ? ? From: [email protected] <[email protected]> On Behalf Of Jerry Gaffke via Groups.Io ? Forty years ago, programming might involve typing into an ADM-3 terminal 'Twas midnight, and the UNIX hacks Did gyre and gimble in their cave All mimsy was the CS-VAX And Cory raths outgrabe. ? "Beware the software rot, my son! The faults that bite, the jobs that thrash! Beware the broken pipe, and shun The frumious system crash!"
|
Re: RFI from uBitx TX after AGC and other mods installed
Glad to help in solving the problem. Regards to all Lawrence On Tue, Jul 3, 2018 at 6:21 AM, Kees T <windy10605@...> wrote:
|
Re: Hijacked: C vs C++
¿ªÔÆÌåÓýI started with a 110 baud teletype (also in high school). ?We learned BASIC on it. ?Once I learned ¡®C¡¯ I never went back to BASIC. I don¡¯t recall getting reams of paper due to Fortran errors. ?I remember that you could get a very large stack of paper if you botched the first character (carriage control). ?It would feed the paper at maximum speed and only the CARRIAGE STOP button would stop it. ?It was always something to see the operator come flying out of their seat to reach over the printer and blindly slap the CARRIAGE STOP button (inconveniently located on the other side of the printer). Clark Martin KK6ISP
|
Re: Hijacked: C vs C++
¿ªÔÆÌåÓýTalk about bringing back memories! I learned on a 300baud teletype in high school - my school was
the second in the nation (so I understand) to offer computer
programming, and I took it the second year it was offered.? We had
access to the school system's mainframe through the teletype.? We
also got introduced to our first computer game - "Star Trek". Then I progressed to Fortran on punch cards.? And waited for the (hopefully thin) stack of printout.? (For those who don't understand, if you did the job right, you got a very thin stack of fanfold paper.? If you made a mistake in your programming, you got a big pile with all of the messages and errors caused by your mistake.) Back on Topic - I'd wondered why Arduino code seemed familiar and
why I had little problem figuring out the routines I needed.? I'd
studied C on my own several years ago. On 07/04/2018 03:05 PM, Jerry Gaffke
via Groups.Io wrote:
Forty years ago, programming might involve typing into an ADM-3 terminal |