Occasionally there are actions that have great potential to affect ham radio as a whole but start as small local changes. Maybe the topic for posts about these events should be labeled "info-topic" so

https://pjmedia.com/trending/cal-fire-moves-to-dismantle-ham-radio-system-endangering-lives-amid-blackouts-and-wildfires/

Ben Not all mike jacks are built the same. A quick check might be to use your ohm meter to verify that mike jack conections are going to the proper pads on the PCB. After verifying jack-to-board conne

#ubitx #ubitx-help

CAREFUL!

Ian The microphone operating voltage can be isolated from the transistor input with a suitable value capacitor (observe polarity if using an electrolytic cap). The output of your transistor amp can be

The original BITX: http://www.phonestack.com/farhan/bitx.html Arv K7HKL _._

#bitx20help

Topic and focus of this group is BITX designs, builds, modifications, support, and operation...but there is probably room for limited deviation from the theme and for individual sales of personal QRP

Bill K8JUI stty [-F DEVICE | --file=DEVICE] [SETTING]... stty [-F DEVICE | --file=DEVICE] [-a|--all] stty [-F DEVICE | --file=DEVICE] [-g|--save] Should let you verify the I/O settings and change them

To answer the original question... 1) Original BITX was single-band, mostly 20M. Some were modified for other bands. Analog (L-C) VFO was standard. 2) MKARS-80 was a UK BITX for 80 meters. 3) Kit deve

Some thoughts... If the 2.8 MHz spurious is rough sounding and drifts a bit then it could be some sort of parasitic oscillation. If it is stable and a pure note then it is probably related to internal

#ubitx

Jerry posted multiple comments about using CHIPQUICK but that is for possible component removal after troubleshooting has identified a defective part. First step might be to check for RF getting into

#ubitx

Si5351 I2C interface to Arduino should be 3.2 volt pull-up with 4.7K resistors. This can be obtained from 3.2 regulated volts in the arduino. Puulling I2C up to 5 volts may damage the Si5351 ( I found

#arduino #bitx40help #radiuno #firmware

Norm This is not a political forum. Arv K7HKL _._

He is still in the group and appears here from time to time. Arv K7HKL _._

Apparently you did not read the HFSignals web site where it says that this group is the support mechanism. Farhan does monitor this group and provides his assistance when needed. Arv K7HKL

Chuck The VOL-High side of the volume control is probably not the culprit unless the volume potentiometer hot side has become shorted to ground. Temporarily shorting this to ground would probably not

Sam Confused here. You said you do not have an oscope, so what is it that is making weird lines? If injecting audio at the mixer output did not produce audio at the regular output then you have probab

I will try to help. Since I have not been following your specific thread, can you bring me up to speed. The topic indicates you are using a V5 uBITX. What have you tried thus far? Did it ever work? If

Sam Difficult to troubleshoot remotely without more information, but if there is no local oscillator signal into the BFO mixer there would be no audio output from that stage. You might connect your ex

On-line information can read by using features of the computer to magnify text and image size. If available, a large screen TV usually can be connected to your computer to show things in larger format