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Nice work, Jc. I can see this as being easily made with automated equipment, but... that's a lot of holes to drill at home. And all of them have to be precise. Is it possible that a muppet style of

You might need a more solid ground plane. ?Perhaps stitch some of the islands on the backside together using traces on the front side. ? You are using 1n4148's in the mixers, Farhan is using BAT54

It looks good! If it were mine I would change tow minor things. The resistors I would show as 4K7 for 4.7 because my old eyes have trouble with those little tiny decimal points any more, and I would

"...the snippets I copy and paste..." Therein is why I corrected it, because it would have confused some people. If you had "copied and pasted" it from code that worked, it would have been an 'L', not

Hi Fellows This is only a prototype to work with a PCB. I have the file with the Sprint layout from ABACOM. Any concern about the design please forward to-Heriberto- cl2kmk@...

I ordered 2 kits thankfully because both were missing parts and I could make 1 kit from the 2 ..seller non-responsive.. can anyone tell a newbee how/where to connect the "audio" and "to AGC" to the

Ah, come on. ?You're tougher than that. ?It's how you learn. ?You've learned a fair bit these last couple months. Now go clean up that wireup documentation. Jerry

Noel Used this code - it works great! More reliable and responsive than the original.? Thanks, Howard, VK4BS

That's really great Jerry. Thank you. Now be sure you save it somewhere so you can post it again the next time it comes up. Maybe a mini book to point newcomers towards might be a good thing.

OK, here is where I am so far. I removed C91 and C92. I changed the 1.05 Raduino sketch by? adding code to read pin D7. In the original sketch, this was reserved for the TX/RX line monitor, which I

John Smith, Here's your paper. Assume for now that we are transmitting an AM signal at 12.000mhz with a 1khz tone from the microphone. ?The two diode modulator get's a 12.000mhz carrier from the

So the high value resistor will get swamped by that low impedance node when you power up the microphone amp. I think. and? Will it affect the POP? jgaffke@...> wrote:

I never said anyone proposed it. But I am now saying it has come up several times. After the earliest conversations of operating CW, on this BITX someone had looked it up and provided greater detail

Okay thank you! Sent: Friday, April 07, 2017 3:49 PM To: [email protected] Subject: Re: [BITX20] AD9850 instead of Raduino Yes, it's ignored. I actually have a pre-raduino and post-raduino version

Yes, it's ignored. I actually have a pre-raduino and post-raduino version and this is the only difference I could spot. I'm using a 10-turn pot connected to the Arduino to tune similar to the

Would you think the whole circuit behind C93 and L4 is ignored? Also, did you not remove the tuning pot? Do you use the rotary encoder to tune? Sent: Friday, April 07, 2017 3:41 PM To:

I removed C93 and L4. Works perfectly. 73 - Ben billy.shepherd@...> wrote:

So the high value resistor will get swamped by that low impedance node when you power up the microphone amp. ?I think.

I purchased my Bitx40 last December. Everything works great. I'm trying to use items I already own to build a DDS. I connected a AD9850 with an Arduino Mega 2560. I added a contrast control, an LCD

When the microphone amp drives the modulator, it sees the two diodes plus R37,R38,R39. ?A very low impedance load.