The "Building Guides" link on the WIKI directs back to the home page
rather than the "Building Guides" page.

The "Building Guides" link on the WIKI directs back to the home page
rather than the "Building Guides" page.

Mike N.

K5ESS

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I'm intending to do the same. ?The 40m bandpass filter at L1,L2,L3 will block 10mhz. ?So was going to just put a wire across from the top of C1 to the top of C7. ?With no bandpass filter and assuming stock low-side vfo injection at 12-10=2mhz, we would get an image from any 12+2=14mhz station, but should work well enough.

Jerry, KE7ER

Hello Jack,

may I ask you for a code validation?

I wanted to allow me to increase the tuning speed by pressing the button connected to A3.

So I made a modification to the doTuning function.

Seems to work, but I am not sure, if this has some flaws the way I did it. Could you please take a look at it and tell me what you think?

As you know, I am not yet familiar with coding Arduino sketches.

I attached my test sketch. Hope attaching workes.

BTW, there are warnings for every printLine1 and printLine2

E:\bitx40\raduino_new_library\raduino_new_library.ino:666:34: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]

? ? ?printLine1("Raduino v1.01");

I fugured out, that there must be some reason why it does not want a string as paramater for the function. So I changed all this calls for example from

printLine1("Raduino v1.01");

to

? strcpy(c, "Raduino v1.01");

? printLine1(c);

I saw in the code that the frequency upper and lower limit is preset in software. I am sure it could be set for your band permissions if someone wanted to. But how far out can it receive with it's hardware limitations? I would like to receive 10 Mhz for WWV clock for frequency calibration.

Tried the calibrate function using the firmware in a unit as shipped end of January. ?When I move a station up the dial by 1khz, the offset shown is -0235000. ?But at least when I am done calibrating it really is moved up the dial. ?Not sure if it successfully read back from EEPROM after a power down and retained the new calibration, didn't try that out.

I then updated the Raduino with the firmware from??using the adjustments for calls to the new Si5351 library. ?Totally different behavior with the github code. ?Offset for calibrate() is now conveniently displayed in Hz. ?But when I release the calibrate switch, the station is still where it was before. ?That's consistent with my reading of the code from github: ? The variable "cal" is local to function calibrate(), and no attempt is made to use it by doTuning() or setFrequency(). ?No call to si5351_set_correction(). ?

The github code executes this line in calibrate() just before writing to the EEPROM:

??cal = (cal * 10000000l) / frequency;

That looks nonsensical to me, though it may help explain the weird offset values that get displayed during calibrate() in the code as shipped.

I've wasted a couple days on this, and I suspect a dozen others have done so as well. ?Would be good if the code most people are using (the code in units getting shipped) could be posted to github. ?Meanwhile, I guess I write my own calibrate() and give up trying to understand what this stuff was supposed to do. ?The calibration procedure should include a step where we zero-beat the vfo to the bfo so we can measure where the analog bfo is. ?(That step won't be necessary if the Si5351 also drives the bfo.) ? Then after lining up with a station of known frequency as the current code does, calculate the vfo error in ppb for a call to Si5351.set_correction(). ?That makes the correction proportional to the Si5351 vfo frequency, not just an offset, and thus remains correct across multiple bands.

I now have the Bitx40 ordered on Jan 30 mostly working. ?But seeing just a few mW of 7mhz out to dummy load when whistling into the microphone, and R136 does not help. ?May need to ask John Smith for advice.

Jerry, KE7ER

On Sat, Feb 25, 2017 at 01:39 pm, Jerry Gaffke wrote ?(in thread?Re: CW or not to CW?)

The "Building Guides" link on the WIKI directs back to the home page rather than the "Building Guides" page.?

Mike N.

K5ESS

开云体育

That's very generous. ?But somehow we have to manage this stuff going forward or we will exceed the extended limits.

Thanks a lot Jack for the detailed answer. That totally makes sense. Especially on a limited space environment, you have to be very carefully with resources. I use to program desktop applications, where that is not that important and so I prefere readability of the code over ewficiency. That's one of the main reasons I stick to Pascal (in my case Delphi) instead of moving to some kind of C. I like the readability and the clearity of the pascal source code.

Nevertheless I will take a look at your books and consider buying them. Hopefully they are available on Amazon.de or as ebook, because shipping from the US will probably be more expensive than the books themselfes.

Any way, thank you so much for all your effort you put in here.

I'm perfectly fine with $1/yr, but that sort of thing will be tough to manage. ?Exactly who should pay? ?Casual browsers interested in the Bitx? ?Somebody who built one from scratch 10 years ago who takes it camping once a year and occasionally checks in? ?Is this on the honor system, or do we keep a list somewhere of who paid so we can hound them off the list if they are regularly asking questions? ?Who collects the money, and what happens if there's a shortfall/surplus? ?Getting 120 people to pass a dollar on through paypal every year for the next decade sounds like a real hassle, especially if interest starts to die a bit. ?The hfsigs pc board is a relatively new thing, but once the issues are sorted out and a wiki has answers easily available, traffic here may subside. ?What's the new limit, and how do we avoid exceeding it when folks start uploading high-res videos of their latest expedition?

Accessing all the old photos and files from yahoo is easy enough, and everything could be archived on a thumb drive in case yahoo goes down. ?Removing photos from groups.io that are more than a year old would solve this for a very long time if folks show some restraint. ?Long term, we could use the wiki to curate what gets saved in files and photos here on groups.io. ??

Jerry, KE7ER ?

Thanks Jack, I'll give your suggestions a try when I get home this afternoon.?

I notice your suggested code for the step change does not have the 'break' command. Does that mean it doesn't use the button? I haven't had a chance to look up your Fast Tune code yet, so sorry if it's covered there.?

73 de KB1VNA

Eric

Finally on a rare day off, have got it all connected up.

About 5W out for just over 1A, now to try and get a few contacts.

Phil G7BZD.