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All you have to do is tune to the frequency that you want to boot to and the switch between VFO A and B This saves the new freq into A. Switch back to VFA A.. next power up your VFO A choice will be

As you can tell, I still haven't got my uBITX thrown together yet! A friend has one with the stock firmware from when the uBITX was first released. He commented that when powered on, it always comes

A close up sharp photo will help to check. V3 or V4 ? Raj

One of the first thing I tried was shielding. The PA, 30MHz LPF and 45MHz filter and even the first BiDi amp. The whole effort made a little improvement but I was not satisfied. I even tried soldering

I have a factory stock Raduino for sale. It has the KD8CEC software now but came with the factory software installed. Only used a couple of hours until I got my original board fixed and calibrated.

Or walls: https://s3.amazonaws.com/files.qrz.com/m/zl2ctm/Tramping_Radio.JPG 73

Mad, Going to Axicom relays looks like it pretty much cleans up our issues with harmonics. But this thread is about spurs, not harmonics. Raj has found that replacing the toroids at L5,L7 around Y1

Maybe a shield between the PA / LPF section and Mixer sections. Aand changing the relays. and maybe a few SMD inductors in the power feed to the RX section.... 73 Nick VK4PP

It’s the PCB tracks/ /layout and relays that are the problem… not the toroids/ toroid layout. MRM Sent: Monday, October 15, 2018 5:45 PM To: [email protected] Subject: Re: [BITX20] Simpler spur fix

I plan on doing the same. I already safely removed the 8 pin Op amp very clean too. So I shouldn’t have any issue with the relays, hopefully. Waiting to order mine. Joe

Maybe this is a stupid question but wouldn't it be possible to just shield the original toroids from electromagnetic influences? I have a small copper cube made from plumbers Sheet copper in mind

Just assembled mine, had a faulty joint on encoder. Check it as I suspect it is associated with no tuning. Display is sign much is working. Once tuning is working, the work the audio. Rig does not

I will buy the AGC board with components. $15.00 ?

Looking for some insight from the group as where to look. I assembled my unit, checked all connections, and turned it on. All I am getting on the display is "CW 7.150", no audio and no action with the

Hello All, I just finished implementing the 45 Mhz crystal filter fix with the 7:2 impedance matching transformer on the output of the crystal. Now I am hearing myself in the speaker when I transmit

Hi Dave, I'll take one, let me know how to contact/pay you. Nigel.

Mounted the AXICOM V23105-A5303-A201 this evening. Replaced all HFD27. And bingo - the harmonics on 3,5 / 7 /10.5 meet the german RegTP requirements (-40 dB). Would also meet the -43 FCC limit. For

Hello John the boards are by N6 DT and come with all componants plus circuit diagram, $10 is fine for one full set of agc...pop fix boards, plus post to your country ill ifnd out what that is.regards

the AGC & POP fix boards are by N6 DT..

Jerry - thank you so much for the positive words. The encouragement is much appreciated. I may have contributed to my own problems by overdriving the audio via my sound card or ground loops, etc.? So