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Arv, I said that on the basis of the results shown in the table by Hiro. At 15m he has shown the biggest spur at 42Mhz not the one Allison first detected on 23Mhz. For the one at 42Mhz a CB low pass

i put it on my website.. it is a larger image if anyone needs one. https://www.hamlogbook.com/microphonepreampwiring.jpg

The Raduino's used with the uBITX and BITX40 are identical with one exception, the 16 pin P3 connector. The uBitx used a 16 pin right angle header to plug into the main board. The BITX40 uses a 5 pin

oh, it doesn't show up as larger.. oh well. kevin

hi John, thanks from everyone for the schematic. I made a larger copy for everyone just in case it helps. Kevin Rea

Hi, You need to goto ubitx.net and download the nextion 3.2 file These are files modified to support your full screen. There are nextion files for 3.5 and 7 inch Joe VE1BWV Joe

Joe: Take your voltmeter and monitor the voltage at the blue wire pin 2 on the Raduino. It should be ~ 0 volts when the key is pressed and +5V when not pressed. If it isn't you have a wiring issue, if

2N3866’s work even better… Sent: Friday, August 17, 2018 1:35 PM To: [email protected] Subject: Re: [BITX20] #ubitx. Increasing power output Bo have you tried the 2N2222A or 2N2219’s yet?

Hi, I recently built my ubitx, and after assembling it received perfectly. I just got my HAM license, so I decided to see how the cw key function worked. There seems to be a problem. I am using the

Official Support GUI is for? 2.4", 2.8" *LCD* , but include 3.2, 3.5 for test (just converted from 2.8")

Bo have you tried the 2N2222A or 2N2219’s yet? Although I haven’t added sockets I did replace all 2N3904s with 2N2222A starting with Q90. My output has increased on the upper bands. Skip Davis,

Iz Oos Might not want to encourage uBITX users to expect that a CB filter will make it legal on 15 meters. The 15M spur is in the 23 MHz range so would not be attenuated by a 30 MHz LPF. Arv K7HKL _._

Hiro san, To do testing on SSB a audio tone signal source is needed. There are aps for android and Iphone that do this.? The procedure is generate the 1.5khz tone and inject it into the microphone

I forgot, the Nextion file is V3.0. Joel N6ALT

Hi all, I have updated the uBitx to KD8CDC's 1.097 firmware and the the latest Nextion 3.2 E tft file to the 3.2 inch display. The display updates and shows up okay except it doesn't fill the right

I have the same problem. It started after I added an Adafruit 2.5W audio amp in the speaker line. The audio volume is great now but the microphone. Would shielding on the audio lines help?

Hiro, Very nice summary chart showing the effect of adding an external Pi tuner.? 73 Kees K5BCQ

Thanks. Its been years since I have had to think about electronics. Sometimes its as if I never taught it. The reason for this project is I was getting bored with 100 watts and at the same time had

I updated to 1.97 and developed two problems. 1. On 40 meters, when FT8 or WSPR finishes a cycle, the transmitter switches to LSB and stays keyed. Power off on the Randuino required. 2. My iambic

I know this is an old topic, but I want to do some SIMPLE tinkering & learning. I put 'socket pins' in for the 6 3904s thinking I could simply find some 'hotter' replacements. ? Well I tried some