?? Mounting holes chart.

I am building, creating a Bitx40v3 Metal Enclosure and intend to put speaker mounting holes in the top lid for a 3" round and 4" round speaker.? Would like to know what speaker size people are choosing for their Bitx40v3 Radio.? 2", 2 1/2" , 3", 4", 5", 6", 3"x5" oval??? It was mentioned that approximately 2" size sounded tinney??? Your experience?

ps.? add any URLs for for mount Mounting holes

In a former job I used to buy plastic enclosures from a company that would machine/paint/silk screen them per my specifications. They would also spray the inside with a conductive paint for RF shielding. I tried recently to find a similar paint but nothing was available in reasonable quantities and reasonable cost.?

Cold Galvanizing paint is an interesting option. Rustoleum even sells that in a spray can. Any idea how we could test the effectiveness of that paint for RF shielding??

The guy who turned me onto the BITX 40 got the analog one shortly before I got the digital tuning one. He had the same parts, but not assembled like the Raduino. It made sense to him to run the raduino code and put the parts together in a similar way. If you go back to the hfsigs.com site, look at the circuit description, download the schematic, connect the parts accordingly. Run the original sketch from-??And use a 10k potentiometer for tuning to start with. Then make your changes to the code for a rotary encoder.

The original code has the settings you need to get it on the right frequency. I just happened to think, you could look at the Raduino code for the specific info you need for your code.

And I don't know if he ever finished it. He's a linux admin, and father of two. And our Tech Net repeater is down.

Good evening folks.

I'm hoping someone out there can give another assist with the Arduino code. I'm getting pretty frustrated with this thing and I just can't find the part(s) of the code I'm getting wrong. I'm sure it's something basic. I just can't see it.

I'm working with a non-raduino Bitx40 (#80!) and am trying to tune it with an Adafruit Si5351, rotary encoder, and a Arduino nano. I'll attach code, taken from AK2B's blog, below.

The two issues I'm having are:

1) I cannot seem to put the right numbers in the code to get the rig on frequency. I've measured my Bix40 BFO at around 11.97MHz, so the Si5351 should be running around 4.97MHz on clock 0 correct? No matter where I put those numbers I cannot get in the band. I was able to receive signals today but there was nothing I could find that would give me a good fix. It's pretty much deaf to the LC VFO for the 40 DC receiver I've got in parts on the desk next to it. This is beginning to drive me up a wall.

2) while you all were kind enough to help before, and the frequency readout on the LCD does change when the encoder is turned, the actual frequency does not until the button that changes the increment is pushed (the encoder does not have an integral button). I've tried adding the display_frequency() command in a couple places (as you can probably see below) to see if the sequence made a difference, but it doesn't seem to change the behavior.?

So those are the issues. Like I said, I'm sure I'm betraying my ignorance of something simple, but I've run out of ideas at this point. The code below is probably as much an illustration of that as could be. My apologies to it's original author.

73 de KB1VNA

Eric

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The Vu2xes layout for mounting

/g/BITX20/files/Enclosures_Metal_or_Plastic/Metal_Box_files/vu2xes_Aluminum_Case
http://bitxhacks.blogspot.com/2017/02/vu2xes-cad-files-for-bitx-box.html
Bitx40v3 PCB holes layout pattern? for mounting to a metal case with standoffs. ?
4 Holes sized 3.5 mm Diameter, 1.75 Milimeters radius,? in a 115 mm x 117.5? mm rectangular pattern for the Bitx40v3 Printed Circuit board mounting holes.? Front to Back 117.5 mm , Left to Right 115 mm
Holes offset from left edge of metal about 21.2 mm in Vu2xes aluminum box overall layout of 299 mm length front to back, 160 mm width left to right, ~9.8 mm tabs on left and right sides.

Fold lines at 70.5mm? from the front and then at (158 mm + 70.5 mm) or 70.5 mm from the back.

The LCD cut out does not match the dimension file from

The Vu2xes LCD? 3.5 mm hole pattern is 75 mm length by 30 mm width and the cutout is 24 mm wide by 71.5 mm

The CrystalFontz LCD 2.5mm hole pattern is? 80 length by 31 mm width and the cutout is 25.2 mm wide by 71.2mm

I made two kits, chosen for their audible side tone. The way the BITX seems setup to work CW is audio cable mic level input. Not line in level input. And especially not headphone level output. Phone level would be like putting an audio cable between a CW kit with a side tone and headphone jack, into the mic jack. Boom!

We need an audiophile to tell us how to produce mic level sound to put CW into the BITX mic jack from a simple code practice oscillator circuit. Instead of the circuit driving a speaker.

It seems like some people don't understand that CW is a single side band signal from a CW transmitter. But with a SSB transceiver like the BITX 40, any sound you can make will be transmitted on the back of the BITX signal being transmitted. It doesn't matter what sound you make, whether it's speaking, whistling, or a fart. If you are communicating, it works.

You don't have to rebuild it to produce a signal the same way a CW transceiver does. It's the Morse Code you want.

That's my opinion. And if it's wrong... Enlighten me, please.?

?

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