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Re: Bitx40 for visually inconvenienced ham #bitx40


 

Don't have a QCX, so can't compare the two except to say the QCX does not do SSB.
The QSX should come out someday, and will do CW and SSB, and a bunch more.
Downside is that the firmware of the QCX/QSX is closed source.
Though both have a CAT interface, should be possible to use that to make it usable
for the visually impaired.? And if not, Hans may be inclined to make it usable
once he has some time.

The Bitx40 can be clean, except for this spur:? /g/BITX20/message/62326
Reports vary on whether that spur is within legal limits, but it is fairly close,
so better than the v3,v4 uBitx in that regard.
Spur can be cured with a high side vfo by going to Allard's v2 firmware and mods:
? ??


The Bitx40, like the uBitx, could use AGC and a pop fix, as per the kits that Kees?
had out in the past (but no longer has).? Worth copying that stuff into any Bitx40/uBitx.?
Could also use protection for Q13 if a nearby transmitter or electrical storm might blow it.
Somewhere in this thread, Kees talks about those kits, and where he hid all the?
design notes up in our groups.io files section:
? ??/g/BITX20/topic/nd6t_agc_implementation_for/18098324
Or look for "AGC" and "pop fix" over on ubitx.net

The best thing about the Bitx40 for this application is that it is simple and open source.
So somebody competent in programming an Arduino could make it friendly to a blind person.
Or do away with the Arduino entirely and drive it from a RasberryPi,? has the computing power
and memory available to do most anything you want.?
With an easy path to the uBitx if more bands are ever wanted.

You might take a look at some of the previous work reported in this forum:
??/g/BITX20/topic/17349156
??/g/BITX20/topic/4181753
??/g/BITX20/topic/4192181

Jerry, KE7ER?

??

On Thu, Dec 27, 2018 at 02:58 PM, Mike Short wrote:
I am looking at options for a 40M qrp radio for a mostly blind ham. He would like to have SSB and CW if possible. Ease of use is paramount.?

He has looked at the qcx40. How does the bitx40 compare?

?I will be putting together whatever we come up with.?

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