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Accidentally included the same picture twice - here's the one I intended to post showing the real time clock & voltage monitor on the screen -- that V308b is a beta version of software and even though it was compiled on 04/01, it isn't an April Fool's Day joke.

Jim - W0EB

My mic has its own processor?

Finally have this one where it will get it's top cover put on and the radio goes into the "go box".? With the addition of one of our RadI2Cino cards, an I2C 4 line by 20 character display, a Teensy 3.6 adapted to plug in place of the NANO, this one is on the air in what will be it's final configuration except for software updates when we release them.? (External USB connector in place so the cover need not be removed for remote control or Teensy 3.6 programming. One nice thing about using the Teensy is the built-in Real Time Clock!? UTC time displayed on the screen and with a backup coin cell battery, the clock stays active even when no +12V is applied to the radio.Also, I added Don, ND6T's neat little AGC mod and boy does that work nicely.?

Here are a few pix of the radio as it now stands.

Jim Sheldon, W0EB

Max,
Here are the direct links to the images showing TX/RX LED wire-up for Sunil's (VU3SUA)?enclosure.

3 wires soldered to PCB:


Proto board connected to LED with series resistors:

If this doesn't work for you, I can include the images in an email to the address shown on your funwithtubes site.

Regards,
Gary
AG5TX

You were getting 25 watts Peak-to-Peak? Or you were getting 25 volts
peak-to-peak?

tim ab0wr

On Fri, 20 Apr 2018 05:00:23 -0700
davesters@... wrote:

I wasn't really trying but this is still only the 4th day that I have
had my ubitx. Using phone I was able to work stations from coast to
coast of the united states. I did it on the 80 meter band. and used a
homemade trap 80/40 dipole.?My radio could put about 25 watts pp. My
power source is a 10 amp linear 13.8v Tripp-Lite. Logged stations in
Maryland, Florida, NY,Montana, Utah, California and states in
between. Most gave me signal reports of 5/4 to 5/9 I got a couple of
4s and a 3/3 I got a 2/1 when working a Missouri station, I am in
Missouri. The longest contact was 1500 miles in Northern California.

I am using the stock electret microphone.

Have also done some CQ ing on 7277. I did find two Hams with bitx
radios One that had his radio out of the box but had not put it
together. The other was N3GO Gary in Raleigh NC, He had a bitx40 that
was modified. I talked to him on both my ubitx and my bitx40. He said
that there was not much difference in signal. I definitely hear
better on the ubitx.??

Dave?
K0MBT

Gee.... I wonder who gave me the idea for my mic?? :)?
Thanks, Jack!
Tom
AB7WT

Unless the display is changed by one of the other tasks there is no
reason to update the display. It's not like you are preventing the
other tasks from running while you automatically update the display on
a regular basis. The speed of sending display updates via I2C really
isn't that much slower than doing it direct. In essence, the I2C
backpack on the display is just another co-processor that offloads
controlling the display from the main processor.

I can't argue with the fact that multiple processors provide more
computing power. However, as you point out, all those processors have to
communicate with at least the main processor which, in turn, slows down
the main control processor while it is communicating.

You might cast an ADC unit that communicates with the main processor
over I2C on an as-requested basis as a co-processor. The main processor
isn't required to actually process the voltage on an analog pin, the
ADC does that. The main processor just gets the result of the read of
the analog value, it doesn't have to actually read the analog value
first before it processes it.

tim ab0wr





On Thu, 19 Apr 2018 21:36:27 -0700
"NNicholas via Groups.Io" <NNicholas@...> wrote:

No, it's not a big difference in speed, that is until you consider
that the display in this radio isn't the Arduinos only task. I
haven't started on this all just yet, but from previous projects.? In
the past ,? ive found cop-rocessing with multiple prcoessors on an
I2C bus to not only offer greatly improved speed up of operations,
over all; it makes dividing up the project a bit easier too. The only
challenge, that I ever found in multiple processors , is at start up,
where you want to make sure that all the processors are talking
before entering into each of their program loops . It's not that hard
to code and you can find plenty of examples on how to do this.

Unless the antenna is picking up a static charge and the antenna tuner is
acting like an impedance to ground draining that charge off. Don't laugh,
it happens.


Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ

Owner - Operator
Big Signal Ranch – K9ZC
Staunton, Illinois

Owner – Operator
Villa Grand Piton – J68HZ
Soufriere, St. Lucia W.I.
Rent it: www.VillaGrandPiton.com
Like us on Facebook!

Moderator – North American QRO Group at Groups.IO.

email:? bill@...

Here is one of mine made in a aluminum pen tube with PTT inside.

Joel
N6ALT

Usually a tuner will increase noise, at least atmospheric noise, as the
tuner creates a match between the receiver and the antenna. A matched
antenna shouldn't "tame" the noise. If that is actually happening then
a closer look at the system might be appropriate.

tim ab0wr



On Fri, 20 Apr 2018 11:39:39 +1000
"John Sharpe" <johsharpe@...> wrote:

Hi all,

I just had a thought about new users of the uBitx and the Bitx40.

I have both of these fine rigs but with my good antenna - a ZS6BKW
<> at 30
feet - the receivers are swamped by noise and big signals on 40
metres.

When I tested just now a 59+ 10 signal on my IC-7300 was unreadable
on the Bitexes with the big antenna (which has a low SWR at 40
metres) because of noise. With an antenna of just 6 feet of wire in
the shack the signal was readable (but weak) on the Bitexes!

I usually use a tuner beween the antenna and the Bitexes - that works
fine to tame the noise. Also I have fitted an RF control to the
Bitx40 that helps quieten big signals.

But if you have lots of noise in the receiver and no tuner - try a
smaller antenna on receive (it will be no good for transmitting). If
that improves things maybe you need a tuner or an RF control.

73s John V2VOL

I would love to compete but I don't think UK stations ,can tx over 7.200. rgds John 2e0eii

7277 kHz in North America, 7177 kHz elsewhere.

Mic gain control:

Remove R62 and R63

Add a 1K preset or Pot .. extreme end connections to PIN 2 - emitter of Q6 and ground.
Connect the center pin to + of C62.

If the gain is increasing in the wrong direction interchange the ends of the preset/pot.
An antilog pot should be smoother in control.

Raj

Hello Norm.
Mine needs every bit of mic gain I can't think of any instance where less would be better.? Is yours too loud or do you have distortion?

I have one of those mic pre amps and compressor boards (about half the size ofa postage stamp) I want to make a separate mic to try it out. It has optional compression and mic gain settings.