If those issues were solved, I'm sorry I missed it.? I've seen others with the same issues.? In any case I'm glad you are going to give it a real shakedown on CW.? Please report the results of your tests.? Looking forward to trying this out.?

Thanks,
Mark
KC4GIA

On Fri, Sep 21, 2018 at 02:58 PM, Jeff Omundson wrote:
It is a little hard that parts become obsolete and so the projects might be difficult to build as is.?

I have booth books and more even old copies of HamRadio, 73, CQ, Pop'tronics.? Its rare I
find a circuit that can't be built because the device usually a transistor or tube is unobtainium.
As a experimenter that's part of the game to figure out what part that is available might be
a good match.? For the most parts Diodes are easy, most transistors are not magic either.
I still pull down SSD and play with ideas.? Spice, rarely and I've driven that and many others,
then again I can drive sim or a slide rule its just numbers and if you don't understand what
their significance its data not information.

The rest of the parts are coils, caps, and resistors and they are fare from rare.? There may
be exceptions but they are far from the rule.??

True thing that ubitx would take people into parts of tech they would never have gone.
Playing with the user interface (raduino firmware) has been the big fun for me.? I was
shocked how few understand superhet radio being a near 90 years old and well
understood.? I suspect that from it being new to people that have never worked with it.
So they get to learn it and all the little things that go with it.

Allison

i have a uBitx that I want to use primarily for SOTA using a straight key and the stock 2-line display. Of all of the firmware options, which one should I?install for 2-line display and straight key cw?

tu dit-dit

I’ve taken a look at this circuit, too. I think Sunil is talking about the power to the first bi-directional amplifier (receive +) before the mixer. I don’t know how well that would work, but I guess it could be worth a try. I’ve added a manual RF gain control to my Bitx using Fig. 6.42 from EMRFD. It could be connected to something like that and probably work.

Thank you for the thoughtful responses!? Great ideas to digest.? I have the Solid State Design book but have not worked my way through it.? May be that is homework :-)? The explanation at the start for biasing transistors always made more sense to me than what I read in other books, including EMRD.? It is a little hard that parts become obsolete and so the projects might be difficult to build as is.? I suppose it could be broken down into smaller bits and then modelled in SPICE with best guesses at replacements for hard to find bits.

I thought buying the uBitx would be kind of a simple and unchallenging project radio.? I bet a lot of people didn't expect it to take us where it has!I haven't done any of the work to make it better, but I appreciate all the work that is being done.? It has prompted me to think deeper about multi band transceivers and it has been interesting to observe the community (and certain individuals in particular) work out solutions.? I think we are all learning more than if we were content to just play radio on the major commercial offerings.

Thank you to Ashar and all of you who have spent so much time working on this and sharing the knowledge!

-Jeff
AG7NW

I find clarity and precision of instructions--if any--sadly lacking from many electronic kits and projects.? The same goes for illustrations that lack important details such as part locations, pinouts, part numbers, flow charts, etc.? Some of our good ham writers and editors might offer to help, but it's an uphill battle.

--
Jon Titus, KZ1G
Herriman, UT USA

Hi everyone. I’m up and running and the radio sounds good!

I went in and did a Set Calibration and then Set BFO and all is good. Boy you can really get this thing out of whack if you’re not careful!

I’ve already had my first QSO between my home QTH near Pittsburgh, PA and Winfield, MO, which is nearly 600 miles. The guy was running a net and said that he was impressed that I could make it that far today on nearly QRP power.?

Thanks for for your help.?

Curt

Anyone of you having TFT file for 3.2 inch basic display?
The one which is in a zip package is too small, loads ok but looks strange in the upper right corner...and my fingers are way too
thick to press those small buttons. The previous one looks good.

Kai OH3WE

Couldn't get it even in as the display says it is not for this 3.2 standard.

How can this be so damn difficult?...

Kai OH3WE

Hi guys,

can't see any NOT ENHANCED tft file for 3.2 in screen which I use in my radio.
Tried 32E_F_0_2d.tft but no go...

Or do I just miss something?

73
Kai OH3WE

I was only citing K2 as example, yes now unobtainable or costly parts as I alluded to. Some of its circuits, like the uBITX, have legacy to discussion in those 2 W7ZOI et al books. The older one has lots of interesting concepts, but many unobtainium parts. What we can get cheap enough can change rather quickly.

I respect many folk around the world cannot afford a K2, hence the uBITX paradigm. Lets see how that new QSX related IRF510 PA works when it comes out.

73 curt

I just got done posting a couple of medium resolution videos of our 2.8" color display (touch screen) but with a "non-touch" feature, control by wired or wireless MOUSE.

The videos are not professionally done and were made using my Samsung phone's camera.? I had to really compress them (the on-camera raw videos were over 1 gigabyte each) so the screen resolution isn't the best but it is readable and does show the capabilities of using a mouse for control.

This display comes with a small plastic stylus which can be used for "Touch" control and I'll post a video or two later demonstrating the stylus for touch control of the uBITX.? On the small display though, the mouse is really easy to use and is actually my personal preference for controlling the rig.? With the mouse (or our optional wired/wireless keyboard) there is no need at all to touch the screen and also no need to use the encoder or function button to control the rig.? They still work though, we haven't eliminated them altogether.

The videos are posted on the TSW website, in the files section.? They are contained in a directory labeled Experimental Videos and are accessible to all.? We hope they are informative and that you get usable information on our display operation from watching them.

Thanks,
Jim Sheldon, W0EB
for the TSW team

Hello again to all HAM,

I should ask again because the Ubitx doesn't receive like it should, till till today..nothing has found but this should not right when see the?Ubitx v3 (FCI)?first batch first shematic from ubitx constructor Farhan and when look the pin in this doesn't contact toghether...

Please help me again the issue from bad receive like not able to hear ssb stations right and one other pointmi found, no AM stations can be hearable right only bad stuff that shows an idea of an AM radio station and this can not be...

Please help he

开云体育

Andy I just ordered a 3.2 screen. I’m excited. Can’t wait to get it. This radio has been a fun build so far despite any technical imperfections.?

Keep going back? as errors and adds may be part of life.

Allison

Curt,

Those would be good solutions if you can get 2sc2166s at acceptable price and quantity
without incurring the problem of fakes.? Its part of why the K1 was discontinued.

We cannot rely on unobtainium.? ?Not that that was not a good solution but the challange
is to find widely available inexpensive parts.? As a professional designer and home builder?
I have an acute realization for that.

HINT:? 3904 can be used it employed at a performance level it can do.? The other is
board layout in a multiband radio is more critical.? Particularly the PA area.

Allison
Engineers build what they want with things they can get.

Jim,

Replacing RV1 with a 10K is not good as it would put all the adjustment in the last 5 degrees of rotation.
A 500 ohm may be better.

But you begging 1 db of gain increase for what reason?? ?Replace the 3904 in that stage prior and the
performance jumps a greater degree and fixes the actual problem there.

Allison