I wonder my BITX has less sensitivity or not.
I maesured it about -117dBm using my HP8656B SG.
Not reached to 120dBm. My K2 reached to -127dBm. hi...
How is your BITX?
ja9mat Hidehiko.
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Re: PD8W code - TFT Display version - Taking another Look - Button issues - Solved
I have the PD8W code working here so far just need to connect the VFO to the Bitx and get the LSB/USB change working
Adrian
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PD8W code - TFT Display version - Taking another Look - Button issues - Solved
Having looked at the PD8W code for the Bitx40 - (which uses a Si5351 , rotary encoder and a tft display) a few weeks ago and not being able to figure out ?the issue of erratic or no control when using push buttons. I put the code away and worked on some hardware. A few days ago I thought I would try again to see if I could figure out the problem. ?Well, I got it to work. The first issue was a hardware one. I had tried pull ups and downs and every wiring configuration I could find, but no go. Then I tried one more config and Wow - the push buttons now work - smooth transitions, no jumping etc etc I wired up the rotary encoder and used the rotary push button switch on the back of the rotary for the vfo frequency time step - works great. Works well on the bitx40. Now I am looking at how to make the MODE - LSB / USB etc work. ?I can control the mode functions on the display but it does not actually change to USB on the Bitx  I attached the button configuration and the sketch I am using? Hope there is some interest and can help figure out ?the mode issue. Thanks Joe VE1BWV
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I had " The Art of Electronics", loaned it to a
young Engineer!? Never got it back!
Expensive Book, $60.? Kind of an odd book, goes
randomly describing circuit design?
Useful?? and interesting.
I would advise the free ones mentioned here, a
much better deal.
Hans Summer describes the first couple years of Electrical
Engineering in College.
On 7/3/2017 7:19 PM, Ashhar Farhan
wrote:
Demaw, Goodman, Mccoy were pertinent in their own
times and did produce great stuff. One could always visit them
for inspiration and nostalgia.
the experimental methods in rf design is really
the most contemporary book. It not only updates but also
points out the mistakes made by traditional understanding. For
instance, the hum from direct conversion was not understood by
the earlier works. Similarly, working with hexfets, broadband
amplifiers,etc. The things that make homebrewing so much
easier now are not found in the old texts. So, if I were you i
would buy the EMRFD. My second recommendation would be the Art
of Electronics.
- f
--
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID "MotDog@..."
Mike@...
|
Demaw, Goodman, Mccoy were pertinent in their own times and did produce great stuff. One could always visit them for inspiration and nostalgia. the experimental methods in rf design is really the most contemporary book. It not only updates but also points out the mistakes made by traditional understanding. For instance, the hum from direct conversion was not understood by the earlier works. Similarly, working with hexfets, broadband amplifiers,etc. The things that make homebrewing so much easier now are not found in the old texts. So, if I were you i would buy the EMRFD. My second recommendation would be the Art of Electronics. - f
On 4 Jul 2017 6:12 a.m., "Michael Hagen" < motdog@...> wrote:
I started looking at Hans Summers.? Wow,? I never
saw this before!
So much detail!
Great Stuff!
Mike, WA6ISP
On 7/3/2017 2:19 PM, John Backo via
Groups.Io wrote:
I agree. All the books and articles of Doug Demaw (and Joseph Carr).
The two great books by W7ZOI, especially EMRFD.
See the introduction to fundamentals on Hans Summers
website, a very good source:
Good hunting. If you see something on the internet, archive it.
It won't be long before you have several GB worth. But it
has a way of disappearing overnight, so get it while you can.
john
AD5YE
--
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID "MotDog@..."
Mike@...
|
I started looking at Hans Summers.? Wow,? I never
saw this before!
So much detail!
Great Stuff!
Mike, WA6ISP
On 7/3/2017 2:19 PM, John Backo via
Groups.Io wrote:
I agree. All the books and articles of Doug Demaw (and Joseph Carr).
The two great books by W7ZOI, especially EMRFD.
See the introduction to fundamentals on Hans Summers
website, a very good source:
Good hunting. If you see something on the internet, archive it.
It won't be long before you have several GB worth. But it
has a way of disappearing overnight, so get it while you can.
john
AD5YE
--
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID "MotDog@..."
Mike@...
|
Double pole double throw switch ????????????????????? ?????????To in??????? to out ?????????????of the agc board ¡¤??????? ?????????????*???????? ??Audio ?in?????? *?????????????? *??? Audio out ??????????? ???????????????????????*----------* ? Rough drawing but in one position audio is routed to the agc board and the agc out is routed to the speaker In the other position the agc circuit is bypassed. ? v/r Fred W4JLE
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of EA3IAV
Sent: Monday, July 3, 2017 15:57
To: [email protected]
Subject: Re: [BITX20] AGC working ... ? Sorry I have just build the circuit. How do I connect it?
speaker + ?to input -> output to speaker?
I power it with 12v?
any hint to best turn it off or on? Just power off? Will it bypass?
thanks
?
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A ton of good information can be found searching the QST archives at
I've learned so much by reading the articles by hand summers and Rick campbell....now I need to search the other names mentioned in this thread.
73 AC3AX
On Jul 3, 2017 5:19 PM, "John Backo via Groups.Io" <iam74= [email protected]> wrote: I agree. All the books and articles of Doug Demaw (and Joseph Carr).
The two great books by W7ZOI, especially EMRFD.
See the introduction to fundamentals on Hans Summers
website, a very good source:
Good hunting. If you see something on the internet, archive it.
It won't be long before you have several GB worth. But it
has a way of disappearing overnight, so get it while you can.
john
AD5YE
|
Ok I think it woks! I get sound comming from the speaker. How can I confirm that it is doing its job? If something had go wrong with the wiring I suppose I woukd hear nothing I guess.
thank you
|
I agree. All the books and articles of Doug Demaw (and Joseph Carr).
The two great books by W7ZOI, especially EMRFD.
See the introduction to fundamentals on Hans Summers
website, a very good source:
Good hunting. If you see something on the internet, archive it.
It won't be long before you have several GB worth. But it
has a way of disappearing overnight, so get it while you can.
john
AD5YE
|
Ok, i just changed wires. Does it bypass if I cut 12v?
thanks
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Sorry I have just build the circuit. How do I connect it? speaker + ?to input -> output to speaker? I power it with 12v? any hint to best turn it off or on? Just power off? Will it bypass? thanks  ?
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I had a cable that was +5 power only, no Data!
I guess for charging stuff?
Yikes, cut in half and into trash.
Mike, WA6ISP
On 7/3/2017 12:17 PM, Arv Evans wrote:
Mike
WA1MAD
What
OS (Windows, Linux, OS-X, Android, etc.) are your running?
Which
IDE version are you running (1.8 is the latest)?
On
Linux....disconnect your USB cable, on a terminal enter
"lsusb".
??????????? then
plug in your USB cable and again enter "lsusb".
??????????? the
difference between listings should be the USB port that is
??????????? connected to the Arduino ttl/USB port.?
On Linux, problems
might be:
???????????
Arduino type selected does not match the actual Arduino
that is connected.
??????????? USB
cable is not connected
??????????? 5V is
not getting to the Arduino (shorted peripheral...?)
???????????
Arduino is DEAD!?? 8-(
Only
Linux here so I can't help you with other operating systems.
Arv
K7HKL
_._
--
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID "MotDog@..."
Mike@...
|
Mike WA1MAD
What OS (Windows, Linux, OS-X, Android, etc.) are your running?
Which IDE version are you running (1.8 is the latest)?
On Linux....disconnect your USB cable, on a terminal enter "lsusb".
??????????? then plug in your USB cable and again enter "lsusb".
??????????? the difference between listings should be the USB port that is
??????????? connected to the Arduino ttl/USB port.?
On Linux, problems might be:
??????????? Arduino type selected does not match the actual Arduino that is connected.
??????????? USB cable is not connected
??????????? 5V is not getting to the Arduino (shorted peripheral...?)
??????????? Arduino is DEAD!?? 8-(
Only Linux here so I can't help you with other operating systems.
Arv K7HKL
_._
On Mon, Jul 3, 2017 at 1:06 PM, Michael Davis <maddmd818@...> wrote: My comm port selection is greyed out and I see no baud speed option. Hmmmm
Sent from Mike's iPad WA1MAD
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My comm port selection is greyed out and I see no baud speed option. Hmmmm
Sent from Mike's iPad WA1MAD
|
Ah yes.? CH340 communication with the cheap Nano clones. ?google nano clone usb.
Larry
On Mon, Jul 3, 2017 at 2:01 PM, Jack Purdum via Groups.Io <econjack@...> wrote: Sometimes you need to install the drivers that are distributed with the IDE. Look in the drivers subdirectory if the IDE directory and run the *.EXE that applies to your system.
Jack, W8TEE
I was so proud of myself, using 1.17.1 ...until I got to the upload step. I get "problem uploading to board" message see Etc etc. could it be a bad cable, wrong cable, bad connection? I have the Bitx turned off and when it is plugged in to the computer usb port it (the screen on the Bitx) looks normal. A:7.1145 LSB. I'll read the error message link to see what it says. Thanks WA1MAD
Sent from Mike's iPad WA1MAD
|
Sometimes you need to install the drivers that are distributed with the IDE. Look in the drivers subdirectory if the IDE directory and run the *.EXE that applies to your system.
Jack, W8TEE
From: Michael Davis <maddmd818@...>
To: [email protected]
Sent: Monday, July 3, 2017 12:14 PM
Subject: Re: [BITX20] Pins and colors
I was so proud of myself, using 1.17.1 ...until I got to the upload step. I get "problem uploading to board" message see Etc etc. could it be a bad cable, wrong cable, bad connection? I have the Bitx turned off and when it is plugged in to the computer usb port it (the screen on the Bitx) looks normal. A:7.1145 LSB. I'll read the error message link to see what it says. Thanks WA1MAD
Sent from Mike's iPad WA1MAD
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Radio Havana broadcasts a monstrously powerful, ridiculously wide bandwidth signal out Cuba on 6.0 MHZ. The 2nd harmonic of that frequency is 12 MHZ, which is the same frequency as the IF stage. I've picked them up at 7.035, which is supposed to be a QRP calling frequency. If there is any other carrier at or near that frequency, it knocks Radio Havana out. I also find that when I orient my antenna East to West, but turn slightly south of west (heading 260), Radio Havana falls into one of my antenna's null zones.?
Although, listening to socialist propaganda on the CRI re-broadcasts is always amusing....
On Mon, Jul 3, 2017 at 12:59 PM, chris gress <Chrisg0wfh@...> wrote: Hi I am talking broadcast stations in the? 7,100 to 7,200 mhz part of the band I have put in rg174 between dds and vfo input on bitx also used some for my rf gain control r13 to 1k pot?
--
Andrew KrauseGeneral Class Amateur Radio License: KM4ZJO
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Re: VU2ESE AGC Schematic redrawn
Steve,
No, the Bit40 has not changed, so you do it if
you want AGC circuit.
73's
Mike, WA6ISP
On 7/3/2017 9:48 AM, Steve Saslow
wrote:
Does this audio age circuit apply to my very recently
purchased new BITX40? Is this a message or instruction to add or
change something in what I am about to assemble? Thank you! -Steve
K7EW?
--
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID "MotDog@..."
Mike@...
|
Hidehiko Komachi - JA9MAT