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I wonder why the earphone jack must not be grounded? When i measure from speaker (minus) to ground there is connection. I plan to install in a metal case an mount the jack in the front.

Tilman

you can ignore this warning. If you want to disable warnings with printLine function calls you could try to use statements like this:

printLine2( (char *) " ? ? ? ? ? ? ? ? ? ?");

For more Infos look at:

/g/BITX20/message/22696?p=Created,,,20,1,0,0?

there already was a discussion about this.

Armin, DJ2AG

Ron

Thank you so very much.

I changed for version 1.1.2.

After a "verify-run" I still get a number of varnings though. I have not changed the code, so all is the original-code to start with.

The warnings I get are along the line of :

In function 'void setup()':

warning: depecated conversion from string constant to 'char*' [-Write-strings]

printLine2(" ? ? ? ? ? ? ? ? ? ?");

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ^

The library LiquidCrystal 1.0.5 is installed

Then doing a "Tools - Get board info" - The output I get is "BN: Unknown board"....

I use ARDUINO 1.8.1 ?installed from Windows store.

------------

Would be handy to have a doc that describes what need to be installed to have a working programming environment .... ?;-)

/ Tilman SM0JZT

Just to be obnoxious: ?Mostly right, though not absolutely right. ?Voltages at K1-14 are around 200mv rms max of 7mhz during transmit, 1n4148's there would not conduct more than a few microamps till voltages got beyond double that. ?But I'll agree with John that ?K1-12 to ground is the logical place, that's where I put them.?

Hi Sandeep jee,

?The capacitor under discussion is for carrier removal and Audio in/ out can happily work even with 0.1uF value, I suppose, sir.

sarma

?vu3zmv

The diodes are to protect Q13's base from strong signals during receive only, the diodes shouldn't be connected to Q13 in transmit (Q13 is a transmitter pre-driver). Using the K1 pin numbers shown on the schematic at , they should be between K1 pin 12 and ground - that way they will only be connected during receive and also provide protection to the RX circuitry. On the top of the BITX40v3 board, you can see the trace coming from C132 (which goes to Q13 base) and connecting to K1 pin 12. If the diodes are connected to K1 pin 14, they will always be in the circuit, even during TX. Without these diodes, a number of people have had Q13 fail when a strong (100W) TX is on an antenna located near the BITX40v3 antenna.

Damb you Ashhar... now I have another project to add to the ever growing list.... uBitx looks like a very interesting rig, I am sure it will evolve a bit in the next few months so it is probably lucky I have 3 other rigs partly completed that I need to finish first.

Thanks Ashhar and the others involved with this project it looks to be an excellent piece of home brew work that many will replicate.
--
Mike VK3XL

?OOPs meant to say?

"The attached photo shows the diodes attached from Pin 12 to Pin 16 (K2-14 to Gnd) and two wires for TX LED (pin 1 to Gnd)."

Pinout also got reformatted hope below version is better.

Gene

Hi all,

I am still working on my BitX40 v3 and having a great time!

Thanks to everyone for all there help in my debug so far.

Quick question. ?I have the schematics but is there a complete corresponding parts list somewhere?

Seems trivial but it would make it easier to replace some parts if the part number was quickly available (some of the devices are difficult to read).

Thanks,

Gene?

N2IJF

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That QST article suggests the return loss might not be acceptable across more than one band. ?The topology agrees but Ashhar's values differ significantly from those recommended, might be something more going on here.

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