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And the speaker jack is STILL wired up to both the tip and ring. As has been pointed out, a mono plug plugged into it shorts the audio to ground.

As you see fit.
Your project.
However,

Would be nice to somehow address errors in the "official" instructions
in a timely way.
Otherwise it's up to the forum here to sort that stuff out.
Again and again and again.

For example, the wireup page still has this:
The 1N4007 has to be installed with reverse polarity. Its purpose is
to conduct
if you have supplied reverse voltage to the radio and burn itself out
instead of the radio.

As has been pointed out here several times, that section of the wireup
is incorrect.
When the diode blows, the next thing to go is the radio.
It might work if you have a big schottky diode and a fuse at the supply
so the fuse can blow first, but no mention is made of a fuse.
A faulty reverse protection scheme is worse than none at all, as some
people will assume it works.

And where does something like the WX TDA2822 get sorted out?
That should probably be in the wireup page, new information being put up
as it becomes available.

I'd prefer to see a link to a specific curated webpage of errata at the
top of the hfsignals wireup page,
not just a website homepage, with appropriate disclaimers.
Either that, or somebody at hfsignals has to be monitoring the forum
closely and editing the information
in a timely manner.

Jerry, KE7ER


On Tue, Mar 13, 2018 at 10:52 pm, Ashhar Farhan wrote:

On thr hfsigs site, or anything else that I endorse or recommend, I
never do that without having tried it myself. That is the
unfortunate part of pursuing experimental methods. It is also good
in that whatever mods are on hf, if any, they are robust.
There is the bitxhacks blog, the ubitx.net <> for
the rest.
I am going to put those links with the caveats on the ubitx page. Is
that a good option?
This reminds me of a software piece that knith once wrote about : be
careful with the abive code, i have only proved it to be correct, i
havent tried it.
- f

The 12mhz crystals not 12mhz but rather 11,984,800 and currently I have my sidebands at 11994420 for USB and 11996450 for LSB.

On thr hfsigs site, or anything else that I endorse or recommend, I never do that without having tried it myself. That is the unfortunate part of pursuing experimental methods. It is also good in that whatever mods are on hf, if any, they are robust.

There is the bitxhacks blog, the for the rest.?

I am going to put those links with the caveats on the ubitx page. Is that a good option?

This reminds me of a software piece that knith once wrote about : be careful with the abive code, i have only proved it to be correct, i havent tried it.

- f

Hello Ian

Made some test transmissions with the new version and, as you can see on , the signals are heard all around from the uBitx on a 42m vertical delta loop. All settings left as per factory, no corrections anywhere.

Is it not possible to adjust the soundlevel by the software to control the output?

Many thanks and 73, Gerald - HB9CEY

Hello Everyone,

I've been working on my own digital VFO/BFO for my BITX40. The goal:
Switch sidebands without inverting the VFO to 19mhz for 40M and 26mhz for
20M. I've got it working, mostly, but I'm having one heck of a time with
audio quality. The 12mhz crystals not 12mhz but rather 11,984,800 and
currently I have my sidebands at 11994420 for USB and 11996450 for LSB.
These are 2030 and 4060hz away from the crystal frequency, and I am having
a hard time visualizing how that works. But at any rate, these are the
what I came up with mostly through trial and error.??

I'm currently using a modified version of the uBITX sketch. I've added the
offset frequency (11984800, named vfoOffset) and lsbCarrier and am using
the following to do my tuning:

if (isUSB){ si5351bx_setfreq(0, vfoOffset + frequency);
si5351bx_setfreq(1, usbCarrier); } else{ si5351bx_setfreq(0, vfoOffset +
frequency); si5351bx_setfreq(1, lsbCarrier); } I've also added menu items
for adjusting the USB/LSB and Offset easily, and using these I adjusted
for best inbound audio and ended up with the aforementioned values. When I
tune the radio to 7074mhz and select USB, I'm not getting *any* decodes on
FT8- but it works on LSB... What on earth? The other thing is that audio
output (as tested by transmitting into a dummy load and listening on my
Kenwood) is just terribly choppy and unintelligible. I've tried varying
the signal output strength of the si5351 clocks from 2ma to 8ma, no
difference. It sounds terribly over-modulated.

I have gotten in over my head, but I'm determined. Can somebody help me
understand this so I can not just complete this project but get a better
understanding???Thanks so much.

--??
Ryan Flowers - W7RLF
MiscDotGeek.com ( )
Multi Band BITX40 ( )
The BITX40 FAQ ( )