Re: Ideas for AM, NB FM Demod and CW filter board
Yes that is true but we must not forget that Bitx and uBitx are affordable for a beginner amateur radio and that adding a lot of additional features will confuse more than one if the price was a lot most important. What makes Bitx interesting is the price that allows a beginner to start and a seasoned enthusiast to experiment with many things. We are still in the QRP traffic domain. Or we must add these features in the form of additional cards that can be purchased or manufactured later. I think the most desirable goal would be to make a modular package that everyone can change as they see fit.
That's just my opinion
73 QRO
@Gilles,
Lets not forget that in some countries HF equipment is quite expensive and therefore many of the new radio enthusiasts are starting in CB 27Mhz AM/FM.
In my opinion this modes are also quite useful.
Also on amateur radio level in 10 meter band in the summer when the propagation is open many nice QSOs can be made in FM around 29600Mhz.
So in these case why not to have AM/FM
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Re: Ideas for AM, NB FM Demod and CW filter board
FM is used on 29 Mhz!
Raj
At 05-06-18, you wrote:
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Hello
Questions to ask:
Is the AM still used at amateur radio level
Is the FM used in the HAM band, except that the uBitx attacks a 144 or
430mhz transverter?
73
2018-06-05 12:44 GMT+02:00
<tutdavid@...>:
- Hi,?
- Yes I think this would be a great improvement to implement also AM/FM
to the uBITX.?
- Does anyone have some ideas ?
- Thanks !
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Re: Ideas for AM, NB FM Demod and CW filter board
@Gilles,
Lets not forget that in some countries HF equipment is quite expensive and therefore many of the new radio enthusiasts are starting in CB 27Mhz AM/FM.
In my opinion this modes are also quite useful.
Also on amateur radio level in 10 meter band in the summer when the propagation is open many nice QSOs can be made in FM around 29600Mhz.
So in these case why not to have AM/FM
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Take some help Hakan! many here who are your age and I am only a few years younger!
Raj
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At 05-06-18, you wrote: I have a little more than 0.6v across base and emitter on all of them. 7.7v across collector and earth on Q10 and Q30 and 11.9v on the rest. Seems ok.
I have only unsoldered and ckecked one trifilar (T3). No short between windings. It was a pain for an old man with not so good eyes anymore and used to vacuum tubes..
H?kan
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Re: Ideas for AM, NB FM Demod and CW filter board
Hello
Questions to ask: Is the AM still used at amateur radio level Is the FM used in the HAM band, except that the uBitx attacks a 144 or 430mhz transverter?
73
Hi,?
Yes I think this would be a great improvement to implement also AM/FM to the uBITX.?
Does anyone have some ideas ?
Thanks !
|
Re: Ideas for AM, NB FM Demod and CW filter board
Hi,?
Yes I think this would be a great improvement to implement also AM/FM to the uBITX.?
Does anyone have some ideas ?
Thanks !
|
According to the website, the only difference in the Raduino¡¯s is the firmware. Are you saying this is not the case?
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I have a little more than 0.6v across base and emitter on all of them. 7.7v across collector and earth on Q10 and Q30 and 11.9v on the rest. Seems ok.
I have only unsoldered and ckecked one trifilar (T3). No short between windings. It was a pain for an old man with not so good eyes anymore and used to vacuum tubes..
H?kan
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Re: RF power chain mods and improvements..
Ok. To attenuate spurs at an acceptable level we might add a high pass filter for the 10m band. However for the 15 and 12m band I don't see an easy solution
Il 05/giu/2018 06:19, "Tim Gorman" < tgorman2@...> ha scritto: Arv,
This is how I've always operated my linear amplifiers. Tune for max in
CW and then mark that level on the oscilloscope. When in SSB never go
above that level with your modulation. It's a pretty conservative way
to operate but it's also the easiest. You don't have to worry about
trying to read a trapezoid display for linearity!
tim ab0wr
On Mon, 4 Jun 2018 15:20:24 -0600
"Arv Evans" <arvid.evans@...> wrote:
>As long as the microphone port audio input is below 45
> millivolts the spurs seem
> to be down at least 50db, but can be pushed even further down by
> reducing the audio
> level to around 32 millivolts.? This seems to be where oscilloscope
> peak-to-peak RF level
> is about the same as when using CW mode.
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Re: micro bitx: strong signals from broadcasting stations
That can be removed with a high pass filter especially if you don't mind for the 160meters band. It can be done with three small toroids and high voltage ceramic capacitors. Just put externally. You might also try a notch filter that eliminates the offending frequency. Of course all this assumes that the MW broadcast does not emit spurs on the HF, in this case you could not do much
Il 05/giu/2018 07:26, "vu3jyt" < vu3jyt@...> ha scritto: The signals from MW broadcast.
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I renamed the files excactly like the popup states and still the same error...?
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Re: micro bitx: strong signals from broadcasting stations
The signals from MW broadcast.
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Fortunately, the way git (the software used by github) is structured, it doesn't really need a server! git is a distributed source control system. that said, it does have? server mode that can quickly be setup anywhere on even a raspberry pi.? If Microsoft makes any controversial move, I can see the repositories quickly move away from them. That said, I am not sure that they have the lee-way to do much in terms of changing licensing of the hosted repositories.
- f
On Tue, Jun 5, 2018 at 9:24 AM, Thomas Sharka via Groups.Io <sharkatw@...> wrote: Corporations are not evil, they're indifferent. That makes them quite dangerous indeed. Microsoft hasn't changed all that much from their adopted philosophy of "embrace, extend and extinguish" since the 90's. If you do a little research, you'll find that most of the corporations have pretty much that same bias. If there's competition, eliminate it. If it's a small start-up, all the more so.
How's that Skype working for you? ?
On Monday, June 4, 2018 11:18 PM, "Tom, wb6b" <wb6b@...> wrote:
I certainly would not change from Git. It is a standard that is not tied to GitHub.
I also have an account on BitBucket??BitBucket and GitHub both have free accounts. GitHub bases their paid accounts on the number of repositories, BitBucket on the number of users. Often companies I do consulting for have BitBucket accounts rather GitHub accounts. BitBucket seems to have features that bigger organizations like.?
Microsoft does not seem as evil as they were in the past, but as big companies start buying and consolidating things, and the internet just becomes more of an extension of your cable company and the entertainment industry, the shape of the open internet and open source could change over time. But, that is likely a long way off.
If GitHub becomes an undesirable place to host projects, other companies will will respond with new offerings.
Tom, wb6b
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Re: The new uBITX boards are here
Jamie, Check on ebay for old GE and Motorola communication speakers. I found several of $6. You can either use them as an external speaker or pull the speaker out and mount it inside your case. The best communication speaker I have ever had was an old drive-in movie theater speaker I picked up when one was closing down and selling everything off. I wish I had bought 20 of them! tim ab0wr On Mon, 04 Jun 2018 09:42:35 -0700 "Jamie Anderson" <jamiea@...> wrote: I also found a 50 ohm version of the Visaton that Mouser carries, so
there are 8, 16, and 50 ohm versions of this water resistant
speaker.? No 32 ohm version, but if 16 or 50 would work I bet this
would be a good sounding speaker for SSB voice on this radio.
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Re: RF power chain mods and improvements..
Arv, This is how I've always operated my linear amplifiers. Tune for max in CW and then mark that level on the oscilloscope. When in SSB never go above that level with your modulation. It's a pretty conservative way to operate but it's also the easiest. You don't have to worry about trying to read a trapezoid display for linearity! tim ab0wr On Mon, 4 Jun 2018 15:20:24 -0600 "Arv Evans" <arvid.evans@...> wrote: As long as the microphone port audio input is below 45
millivolts the spurs seem
to be down at least 50db, but can be pushed even further down by
reducing the audio
level to around 32 millivolts. This seems to be where oscilloscope
peak-to-peak RF level
is about the same as when using CW mode.
|
Corporations are not evil, they're indifferent. That makes them quite dangerous indeed. Microsoft hasn't changed all that much from their adopted philosophy of "embrace, extend and extinguish" since the 90's. If you do a little research, you'll find that most of the corporations have pretty much that same bias. If there's competition, eliminate it. If it's a small start-up, all the more so.
How's that Skype working for you? ?
On Monday, June 4, 2018 11:18 PM, "Tom, wb6b" <wb6b@...> wrote:
I certainly would not change from Git. It is a standard that is not tied to GitHub.
I also have an account on BitBucket??BitBucket and GitHub both have free accounts. GitHub bases their paid accounts on the number of repositories, BitBucket on the number of users. Often companies I do consulting for have BitBucket accounts rather GitHub accounts. BitBucket seems to have features that bigger organizations like.?
Microsoft does not seem as evil as they were in the past, but as big companies start buying and consolidating things, and the internet just becomes more of an extension of your cable company and the entertainment industry, the shape of the open internet and open source could change over time. But, that is likely a long way off.
If GitHub becomes an undesirable place to host projects, other companies will will respond with new offerings.
Tom, wb6b
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You have to have 12V in the RX biDi amps Hakan.
Q10,11,12 and 30,31,32 must have 12v on rx, if not I suspect the relay K1, please check!
Raj
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At 04-06-18, you wrote: To check if the trifilars are shorted I have to unsolder them, so I wait a little with that.
But I measured the 3904:s. All of them had zero volts between base and emitter.
I also measured the voltage between each leg and earth. The highest voltage was around 0.005 volt. Looks strange to me..
And I must tell it was 30 years since I was an active ham, I am 70 now so I'm a little rusty on the electronic skills ;-)
H?kan
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Hex files scare me. Nope just unpacked fhe zip file and tried to open the .ino file like I did before.
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Did you upload a hex file or actually compile the source code? There's a big difference.
Jack, W8TEE
On Monday, June 4, 2018, 11:25:54 PM EDT, kj6etl <pa1zz@...> wrote:
You mean the Arduino application?
its in the Applications folder of MacOS 10.13.5
I can upload basic sketch into the Nano. Further I used this same Application to upload the kd8cec into an other Nano successfuly.
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You mean the Arduino application?
its in the Applications folder of MacOS 10.13.5
I can upload basic sketch into the Nano. Further I used this same Application to upload the kd8cec into an other Nano successfuly.
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Raj vu2zap
kj6etl