Is it a Problem with the BFO circuit ? .. Ide have a look here ..
On Sat, 18 Feb 2017 at 21:21, Mark Underkofler <mark@...> wrote: I built a BITX40.? It has a clicking noise in the audio different from the clicks from the Raduino when tuning.? It appears to be a problem in the front end.? When I first connected the antenna there was a great increase in band noise.? When I can somewhat ¡°tune¡± a signal, it is just wide band grunting noise when the person talks.? I¡¯ve made a movie of it and can post if anyone is interested.
Fahran said it may be the power supply so I switched to a 12 battery and still have the clicking.? No real signal gets through.? The audio works and the Raduino seems to tune frequency at least it reads 7.200 etc¡
Looking for suggestions.? I built it in a plastic box so there doesn¡¯t seem to be a shorting problem.? No cold solder joints.? No loss toroids.? Shortened all the cables and that did nothing.
Any suggestions would be appreciated.
Mark Underkofler W5MCU
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Re: compressor or processor for BITX40?
I just wired up a cheap CB microphone, I'm using a Sadelta Bravo Plus ..I ?bought it as it was cheap and it's been in my box of Bits for sometime, I knew it would come in handy though ?:-)
On Sun, 19 Feb 2017 at 0:37, Allard PE1NWL <pe1nwl@...> wrote: With QRP levels it is often a challenge to make SSB QSO's on 40m. With my BITX40 I need to shout in the mike to produce some TX power.
It would seem logical to increase the "talking power" somewhat by using a compressor or processor.
Does anybody have suggestions how this could be realized in a simple way?
73, Allard PE1NWL
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Re: compressor or processor for BITX40?
Hello Allard ,
I have the same experience and therefore I am thinking about building the PA0FRI RF speech processor for the Bitx40.
Go to
Select: "MISC "
And then select: " double-sideband speech processor", the sixth item in the list .
A kit can be ordered at www.kent-Electronics.nl
73, Cor - PA4Q
With QRP levels it is often a challenge to make SSB QSO's on 40m. With my BITX40 I need to shout in the mike to produce some TX power.
It would seem logical to increase the "talking power" somewhat by using a compressor or processor.
Does anybody have suggestions how this could be realized in a simple way?
73, Allard PE1NWL
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Re: GPS corrected Arduino controlled VFO
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On Sun, Feb 19, 2017 at 12:21 PM, Ramesh v via Groups.Io <vu3vrl@...> wrote:
Adi Ramesh
Sent from Yahoo Mail on Android
On Sun, 19 Feb, 2017 at 4:02 AM, gene marcus Hello Bob,
I authored the article that you are referring to. The article is located
at: < >. ??I recently
modified the code to run on the Raduino. ?GPS frequency correction?is optional. If anyone is
interested in receiving a copy of the Raduino?version just send me an email.
Gene W3PM GM4YRE
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Re: GPS corrected Arduino controlled VFO
Adi Ramesh
Sent from Yahoo Mail on Android
On Sun, 19 Feb, 2017 at 4:02 AM, gene marcus <gmarcus@...> wrote: Hello Bob,
I authored the article that you are referring to. The article is located
at: < http://www.knology.net/~gmarcus/Si5351/Si5351_VFO_QEX.pdf>. ??I recently
modified the code to run on the Raduino. ?GPS frequency correction?is optional. If anyone is
interested in receiving a copy of the Raduino?version just send me an email.
Gene W3PM GM4YRE
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Re: bitx output harmonics
use what you have. if it blows up. write about it.
- f
On Sun, Feb 19, 2017 at 12:01 PM, John Smith via Groups.Io <johnlinux77@...> wrote: I'm on it. I only have a basic ceramic cap marked 101 will this do? Or does it need to be monolithic or something different? We shouldn't have any noticeable differences in our daily operating styles, shall we?
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Re: bitx output harmonics
I'm on it. I only have a basic ceramic cap marked 101 will this do? Or does it need to be monolithic or something different? We shouldn't have any noticeable differences in our daily operating styles, shall we?
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Re: bitx output harmonics
Pay attention to this one, guys. It is important.
john
AD5YE
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Wayne has provided a one-capacitor fix for the spectral output of the bitx. Just solder a 100pf across the L7. Read his email here
- f
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Hi Ross,
Please test, lets know how you go.
73 Alf vk2yac
bellrossjr@... wrote:
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Hi Alf:
Any chance of compiling the Radiono fix to a hex file and upload it the files?
Thanks and 73 Ross K7RSB
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Hello,
This email message is a notification to let you know that a file has been uploaded to the Files area of the [email protected]
group.
File: raduino.ino
Uploaded By:
Alf Edwards
Description:
Raduino with calibration updates : includes binary hex files
You can access this file at the URL:
/g/BITX20/files/aussieyac/raduino.ino
Cheers,
The Groups.io Team
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Hello,
This email message is a notification to let you know that a file has been uploaded to the Files area of the [email protected]
group.
File: raduino.ino.eightanaloginputs.hex
Uploaded By:
Alf Edwards
Description:
Raduino with calibration updates : includes binary hex files
You can access this file at the URL:
/g/BITX20/files/aussieyac/raduino.ino.eightanaloginputs.hex
Cheers,
The Groups.io Team
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Hi Ashhar,
I put it here, does this help?
73 alf vk2yac
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I would also be interested to see how well the RS-HFIQ works.? If it turns out to be a stable platform pairing it with a Teensy 3.6 + audio board might yield a very nice portable SDR rig.?
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Hi Alf: Any chance of compiling the Radiono fix to a hex file and upload it the files? Thanks and 73 Ross K7RSB
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Hi Ashhar,
I have not used GitHub before, I will register and try to upload.
Thank you
Alf vk2yac
Ashhar Farhan wrote:
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Alf,
If you could push your code to GitHub, i can pull it.
- f
On 19 Feb 2017 7:20 a.m., "alf" <fpdbase@... <mailto:fpdbase@...>> wrote:
Hi all,
Added a change to Raduino.ino to retrieve the stored
calibration offset, I have tested on my bitx40, could someone
check the code to see if there are any gotchs?
Thanks
Alf vk2yac
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Alf, If you could push your code to GitHub, i can pull it. - f
On 19 Feb 2017 7:20 a.m., "alf" < fpdbase@...> wrote: Hi all,
? ? ? ? ? ?Added a change to Raduino.ino to retrieve the stored calibration offset, I have tested on my bitx40, could someone check the code to see if there are any gotchs?
?Thanks
?Alf vk2yac
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I don't think I could put up with the freq jumping around like that, should have a bit of hysterisis in raduino code. ?So you have to reverse direction 2 or 3 clicks before anything happens. ?Somebody in a recent post found that putting the supplied 0.1uf cap on the raduino pins instead of at the tuning pot on the other end of the wires made it behave somewhat better. ?I might eventually go to the shuttle tuning scheme described by Don Cantrell here: ?
On Sat, Feb 18, 2017 at 06:07 pm, John Smith wrote: Mine did this too. When the frequency readout is flicking back and forth there is a corresponding click. When the readout is not flicking a quieter clicking sound can still be heard until I keep fiddling with the knob to get the freq steady, then it's all quiet. It's like the clock generator is changing frequency in small enough amounts that it doesn't change the display. But then after changing the tuning poteniometer for a smaller one with a knurled shaft, it doesn't do that anymore. The freq still flicks back and forth like it did before, but no more quiet clicking. I just did this for a more convenient knob choice. ?I also noticed before, that when it does that quiet clicking, my transmitted signal would also waver back and forth in freq while I monitored with a receiver. ?
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Re: compressor or processor for BITX40?
Allard, your final amplifier is not being driven enough. You have low transmit power. If you have followed the wire up process by inserting your amp meter in the PA positive brown wire and it read 100mA but not 1Amp when you spoke into the mic, then you need to adjust R136. It's a flat silver trimmer on the same side of the board as the PA. Adjust it counter clockwise to increase your drive until speaking into the mic with a long aahhh gets you 1 Amp on your meter. If your meter doesn't show 100mA first, then you need to adjust RV1 blue trimmer counter clockwise until you do get the 100mA the adjust R136 to get 1Amp. This really does need to be included in the wire up notes. It could have saved me a whole dang month Farhan! Not to mention the diode I needlessly removed while desperately trying any possible solution to the low TX power problem. At least you changed the red vs. brown calibration wire kills the raduino thing. I'm still bitter! Sorry Allard, just read the first paragraph.
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Marc Jones