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200 on receive 500 on tx but it doesn’t flick when talking or ? whistling

Great work! In the doc you mention the need to be careful in selection of the I2C display controller and talk about a board from Amazon by seller "IC Module". Would provide a link? My search for IC

Good Idea Dave, I did that on one of mine earlier. I used 1206 size, but 0805 might fit better. No current so wattage is not a factor. Jim - W0EB

Yes, current goes up when PTT is pressed because the rig is now powering the four stages of the transmit power amp, starting with Q90. How many mA on receive? How many mA on transmit?

Ian The v.30 with Ron’s CW Keying code does include adding the 4.7k pull-up at A7, as a modification to hardware. I’m planning on adding both 4.7K chip resistors directly on the pads of the

All valid inputs. But with the atmega2560 the user has more inputs and output pins then one could ever use. With the radio all wired I would estimate more than 25 spare

I begin the tuning process yaving the two blue pots placed fully clockwise but when I have it like this i have much more mA when ptt than if it is turned a bit counterclockwise Is it normal?

I have checked that c51 and r70 have continuity on rx and the opposite on tx (when ppt) i can hear myself on a receiver but no visible output i have tried several bands. Nothing i have checked all ( 1

Hello Still thinking about IRF510 failures and ways to avoid making smoke..... It seems that there may be two ways to limit current in BITX RF PA stages that use the IRF510 device.? First would be

Or build the wa2eby amp with two IRF510's in push pull. Which works great and is pretty much flat through 30mhz

Additional info to what I just posted - I forgot to mention, now that we're using Digital inputs for the CW and PTT functions, this actually freed up 3 analog lines - A6, A7 and the A3 PTT line so you

Ever since we first released the code using analog line A7 (the so called "spare") as the keyer paddle "dash" connection, I've received a number of comments privately and one or two public ones saying

The ubitx I ordered on Dec 14th shipped yesterday according to the email I just got from paypal. Let the adventure begin..I had added DHL shipping so I will keep you posted.. Brian K9WIS

Well it’s this way. You can either spend a little more on the transistor (with the nice input characteristics) and design with minimal parts (e.g. one set of broad band impedance matching

If an oscilloscope is not available you can use a diode probe to measure RF level at various points in your circuits. N5ESE has documented a nice probe along with how it works and how to use it.

Easy to check TX, put the ?Bitx into TX CW mode with a power meter and dummy load attached. If the output is ok, the power meter should show power. I used this method as my mike was not connected

Great job on the website Sent from my iPhone

I had never heard of elegoo.com, that looks like a good steer. They have some nice Arduino starter kits. However, their 2.8" TFT display is not well documented, and burns an awful lot of pins. Here's

I am experiencing the same issue. I see no needle movement on the power meter but i get heard on a nearby receiver. i have changed seceral times the transistors just in case. The same results

Mike : This is an awesome idea ! ? Right away I can see that over time, this could really help to reduce group traffic from "uBITX newbies" looking for? solutions to problems that have already