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Remove L4 to disable the analog VFO. Also a good idea to remove C91 and C92, as Allard's sketch sometimes has the Si5351 VFO operating at 19mhz instead of 5mhz. Then follow the instructions here:

That seems an excellent idea Willy! Let me think this over - perhaps we can implement this ingenious idea! 73 Allard PE1NWL

I might put the "Do not bend" on it, but I don't really want to lie about it. I'll give it a try. Jack, W8TEE To: [email protected] Sent: Friday, June 2, 2017 10:39 AM Subject: Re: [BITX20] #W8TEE

Hi all, I got the original Bitx40 then purchased the Raduino add on later. I've only just got time to do something with it but can't find the instructions for connecting the two up, can anyone point

Allard, I applaud you for the all your excellent work.I love to operate but know little about writing code but had an idea about the mode button. How about avoid adding a mode button by telling the

seems to be very dependent on battery volts. i put my battery on charge and got over 6 watts out terry

Jack, try this... 1) pick someone on the list that's overseas. 2) call the PO and ask what a 1st class letter would cost to send to them. 3) put a piece of circuitboard (doesn't have to be one of the

No. Do not connect 12v to your black ground wire. The coaxial power connector where 12v from your power supply comes into the rig has three lugs on it. I suggest you remove any wires already soldered

See below: To: [email protected] Sent: Friday, June 2, 2017 2:52 AM Subject: Re: [BITX20] #W8TEE Foreign orders Hi Jack I have several comments on this! 1) I think $2.62 was a little optimistic to

I'll try to find some cardboard stiffeners and give it a try. Jack, W8TEE To: [email protected] Sent: Thursday, June 1, 2017 11:30 PM Subject: Re: [BITX20] #W8TEE Foreign orders Hi Jack With boards

terry, divide the peak to peak voltage by two times of the square root of 2 = 2 *1.414 and divdide teh result by the antenna impedance = 50 ohms, so 30 Vpp / (2* 1.414) = 30 Vpp /2.82 = 10.606 V rms

I put a 3" (80mm) brushless 12V fan in the back of my enclosure and found it made a lot of electrical noise. I cured this by putting a 47 ohm 2W resistor in series with it. That took the voltage at

my bitx40 receiver is working well but i have not been able to get out. I thought that i would measure my power o/p so i connected my scope across the antenna connector and got a trace of 30 volts

Regarding ferrites - not to add any confusion, but Jack Smith of Clifton Labs (not any longer found in search) has done much testing with Steward cores (now Laird) Theses are available from Mouser and

So after building this amazing circuit what is the wiring diagram to the raduino? And how to code it to have it displayed on the second lcd line? thanks

So you suggest i better put 12v on it? Thanks!

Don's been on an incredible roll! brilliant stuff. now, i am off to the lab to try some of that - f

So after building this amazing circuit what is the wiring diagram to the raduino? And how to code it to have it displayed on the second lcd line? thanks

Hi I just become a proud owner of BITX40. After 2 evenings tinkering,?I got "first smoke" out (as literally, not virtually ,?whew). I found this?RF spur issue, with among some others, but I think

Hi Jack I have several comments on this! 1) I think $2.62 was a little optimistic to start with ;-) 2) If it was me I'd send it with ordinary first class mail in an ordinary envelope. Perhaps wrap a