Try clamping the mic on TX. No room audio. De-thump should still work. (Theoretical :-) ).
de ZL2DEX

Hi Armin,

1. The file I used from Gary was an ino file. (he also sent along a hex file, but I couldn't get ArduinoBuilder to work)
2. I originally used the zip file from Github - this file contained several ino files - I didn't (don't) know how to compile them altogether to create one compiled file to upload to the Arduino.
3. I am using Arduino IDE on three different machines.
issue with the mac - I would get a "failed to upload" message. This seems to be a port assignment issue.
issue with the win10 machine - I would get a "failed to upload" message. Again this seems to be a port assignment issue, but I didn't spend the time to try and resolve the issue.
Win 7 machine ran without issue after I properly assigned the port.
I couldn't get Arduino Builder to work on the Mac again I suspect a port assignment issue as within the port pull down menu there were no ports to assign.

My most pressing questions are: 1. how to assign the port on the Mac and 2. how do I compile the several files included in the zip file from GitHub into one combined file for upload.

Thanks for you help,

73, Dennis
W7DRW

I want upgrade the firmware of ubitx from stock one particularly for ft8 ( ptt over usb). Some one told me that upgrading firmware associated and followed with recalibration of raduino. Any expert advice please. I dont want to ruin my raduino by venturing unknown territory of calibration and zerobeating.

Thank you, Raj

I found some tips for my Hakko iron that are wide with a square notch in the end that straddles the part and melts both sides at once.?

开云体育

With the amount of rework and component changes on the board to get higher power, wouldn't a better strategy be to get the cleanest output possible, and spend the time designing an external PA that compliments the uBitx?

I too don't note much heat on them but the little 3904s sure heat up.?
I did put one of the tiny Raspberry pi 5v fans with a dropping resistor to give them a little air. You have to add a 7805 regulator or hook onto the big on on the Raduino.
Bo W4GHV?

But unfortunately he's 2000 miles away and I can't help him . ?. ?He is a great QRP lifelong ham too!

Microsoft has done a good job with Minecraft after buying it from Mojang. I’m keeping an open mind.

One comment on higher power...

The T30-6 toroids are way to small for more than 10W.? So all the low pass filters in
the corner wold require revisiting.

Most people at 10W use T37-2 or t37-6 and designs for higher power T50-2
and t50-6.?


Allison

Jerry,

I can post in 18 point type if need be.? Why so large in you posting?

The 2n2369A smt has a suffix and I'd have to look it up.? Last time I ordered it it was 4 years ago.
That is what datasheets are for.??it would only be better than the 2n3904.? It would not be better than
BFR106 what I used

I used the original cores.? I may change them later.

For more than 10W you on your own to experiment there.? I never considered more than 10W as
it was not the stated goal.? ? A reminder if you want more power the rule is quadruple.? If you going
from 5W the next stop is 20 and from 10W its 40.??Anything less is not going to show on the other
guys S meter.? ?FYI typical power steps are 1,5,20 for portable manpacks that can vary power.
Why?? As it takes that much to make a difference.

IF you going for higher power make sure the stages before the finals can supply the needed
drive.? ?You can't use wimpy transistors there.? I would never use SOT parts when I need
watts of power there is no way to cool them well.

I did change the DC fed to the finals and changed it back.? No advantage at 10W.

For driver and predriver SOT anything will not work.? Your on your own to try them
and figure out how to mount them on the existing board.??I specified TO18 for a
reason I've stated many times before.? Note: The four in the driver are required
at time to produce at least a half watt of power if not more.

C77 to ground the output side of the 470uf cap.? It keeps the cap charged
when nothing is plugged in.? ? Why in the world would I put it on C74?

For now Q11 and 12 are the existing 3904s and may be changed.? Need to test first.

One Note, The list of things are what I did and if you copy them and copy means
EXACTLY what I did it may behave the same.? ?Any variations are not what I did
and cannot even guess the result.? I may add its the current state of my radio
and is subject to change.? ?The goal was 10W and not less than 1-2 watts less
on 10M (I'm close).

Allison

Mike,
I'm glad you posted this because I hadn't thought of it before.? I put a 6V regulator in the supply line for the audio amp.? The regulator cost 29 cents, so that could be a good way to power the AGC board without attempting to cut other traces, which is an operation that makes me nervous.
Dan, W2DLC

That's a shame because there are really no changes necessary.? Just put it together correctly and it will work

On Sun, Jun 3, 2018 at 09:44 am, Ghericoan wrote:

what current and voltage do you run when doing WSPR?

?

I don't want to become famous for this, but I accidentally ran a WSPR transmission on 40 M without the antenna connected.? My PS is 12V.? I don't know what the current draw is.? The heatsinks are stock with no fans.

The finals got very hot.? I do not recommend this procedure.? I did not have any reports for that transmission on the map.

The finals survived to transmit after they cooled off.

49.152 MHz crystals can be obtained in fundamental mode (mostly in SMD package; 5x7mm is not too difficult to work with, but smaller packages certainly are), however, check datasheets carefully and confirm with manufacturer if in doubt, as many also are offered in 3rd overtone or don't specify. Above 49.152 MHz, fundamental mode crystal seem to be rare.

That said, I believe the project should consider making the 45 MHz filter normally used in the project available for sale to homebrewers as a component or spare part (perhaps in quantity increments of 1, 10, 25, or something like that); this would greatly help those that want to duplicate or otherwise follow the commercial design and help support volume purchases by the project from OEM in China, and would help homebrewers focus on individually interesting parts of the design without having to resort to making individual design changes in that part of the circuit.

Thank you,

Dave

tim,

I think it would be ok but I have not tested.
Try it and let us know.? I didn't get to that.

Allison

Skip D used printed shcematic and the print is about.01 high.? Oops, it is T9 collector of Q90.

Allison

Thanks Allison..
stupid me i simply did not think before i asked?, i am not young any more and it is very hot in denmark right now
and it was also a lot?easier if someone knew
Vy 73 De OZ1LQB / Claus

William,

Short answer not required.? Though I could as I have I2C displays handy.

The UI will not use a rotary encoder.? There will be an up button and down buttons that
operate as push once briefly you get an increment of frequency change push and
hold it starts stepping like? keyboard key repeat.? So the encoder uses three IO I can
reusefor my needs.

No menu.? There will be a set of buttons one each for U/L(toggle) , VFO A/B(toggle),
SPLIT/On/OFF(toggle), BAND (ring list), and frequency increment (ring list).
Calibrate is an internal function button or serial/USB port as its a one and done.

Since I do not plan to use this radio for CW (I have radios with higher tx power with
less current burn) The unused signals are handy.

Allison

1n4148 should be OK. Silicon diodes.

Raj