you are using earbuds from a cellphone? It has 4 connections on the plug- tip - ring - ring - sleeve. The jack supplied in the kit is 3 conductor - tip - ring - sleeve. It is closed circuit type. You are probably shorting out the audio when plugging in - get proper 4 cond jack. Or you use an old speaker maybe from a radio or computer 8 ohm type 1/4 to 1 watt type. DON't connect the black wire from the board to negative or ground. If mounting the jack on a metal panel then you must get an isolated ground type jack. You still have to key the radio PTT somehow, can't do that with earbuds. I use a 3 conductor jack for microphone and PTT on one cable. Separate speaker jack.? ALSO connect a dummy load to the antenna B4 playing with PTT and MIC connections just to be safe. You probably don't have a 2.5Amp fuse inline with the power yet either??
Hope that helps. Remember there is no dumb questions, just answers!
73 Tom

Hello Paul,

I asked myself the same question and poking around the datasheets I believe that 15V for the main board should be the absolute maximum, with some precautions.

The reason being is that the audio amplifier absolute voltage limit is 15V. I think all the other components can handle the 15V voltage.

This assumes of course that the 5V regulator on the raduino has a heatsink and better also a series resistor to limit it power dissipation.


Before I changed the finals to RD16HHF1s, I added a 12V LM7812 regulator for the main board supply, and fed the IRF510 finals directly with the 16.8V from the 4S lithium battery.?

That way you have a maximum voltage for your finals and a safe one for your main board.

With the 12V regulator you only need a heatsink on the raduino 5V regulator (no series resistor) as the heat dissipation is more reasonable.

73, John (VK2ETA)

Worked and confirmed Scott W1ENK in CT and Willy W1LY in RI almost 59 at times this afternoon around 4PM (2000hrs UTC). Might have heard/worked WB2BLJ and KG4NFT in VA?
Heard absolutely nothing from 7PM local onward on or about 7.277. We gotta move away from the top end of 40M, in my opinion. Too much noise for QRP.
Worked W1LY on his virgin uBITX - still haven't put mine together!?

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Nice Ivan,

Looks like a Gianta enclosure.They make a lot of different sizes in these.

Raj

At 19/02/2018, you wrote:

Okay, I have played with boatanchors and know how to work on tube type radios. Time
to learn some coding for the BitX and/or Arduino. I have a Mac computer. Where should I?
start? Which books are best? I am open to all recommendations? 73 Mike KF6KXG

You may find of interest. He as been working of digital VFO’s and digital displays for the BITX radios, as well as another crystal controlled radios.

Bob nz2z

Yup, a clean miss?
Was a thread early last June on pin headers and cable connectors? for the Bitx/uBitx:
? ? /g/BITX20/topic/5162271

This link from that thread looks about right:
? ??
Though Mike preferred Mouser?538-08-50-0114? pins as they come already cut apart,
others sources give you a strip that must be cleanly sheared, meant for automatic machines.

As stated in the thread, you might want a crimping tool also, or might prefer
crimping with a pliers and soldering.

Jerry, KE7ER

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I have always felt "Deprecated"!

And I am sure not "Polymorphic"!

?

Mike, WA6ISP

Deprecated calls occur because the the function expects a character pointer but you're passing in a string literal (i.e., a string within double quotes). For example, the error:

C:\Users\kb3vgw\Documents\Arduino\bitx40\bitx40.ino:267:34: warning: deprecated

conversion from string constant to 'char*' [-Wwrite-strings]

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

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

is fixed by changing the offending line to:

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

Since it's only a warning, that's not your real problem.

I think I know the problem with the Si5351 library. Your error shows:

???? C:\Users\kb3vgw\Documents\Arduino\libraries\Si5351Arduino-master\src/si5351.h:

The library subdirectory MUST match the name of the header file. In your case, the library subdirectory you are using is Si5351Arduino-master but the header file is si5351.h. Try renaming your subdirectory from what you have to:

???? C:\Users\kb3vgw\Documents\Arduino\libraries\Si5351

The contents of the subdirectory should remain as it is...only change the subdirectory name.

Let us know if that works.

Jack, W8TEE

---

From: Richard E Neese <kb3vgw@...>
To: [email protected]
Sent: Sunday, February 18, 2018 6:53 PM
Subject: [BITX20] bitx40 amatures srccode build error

I am having build issues with the current code

Virus-free.

-- 
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID  "MotDog@..."
Mike@...

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I have a yellow version of the 4x20 I2C on my uBit.? They have jumper addresses to get it's address away from the SI Generator on Raduio.? Sometimes they are even cheaper with the I2C adapter than a parallel one?

I see some guys on here with the .96 OLED on there radios.?? You can even get a Yellow First Line!

Adafruit has Libraries.

73's Mike

Are you thinking about these displays?
Anyone here used them?

-- 
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID  "MotDog@..."
Mike@...

Are you thinking about these displays?
Anyone here used them?

I didn't hear anything.