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Has anyone tried remounting the toroids at right angles to each other. That is what I all ways do and have read no shielding is required. Could be replacing the toroids with SM devices lowers the Q so

I have noticed different capacitance datasheet 'specs' for the AXICOM White D2n and the Black D2n*, although the same part number. The RF characteristics are the same. Capacitance

Giles I'm not sure yet that the relays are the source of the problem. They are probably contributors, but there may be other culprits as well. I noted your earlier suggestion that we might try

Has anyone tried mounting the original inductions from the bottom of the board? Maybe laying flat if possible? Better shielding? Thanks. Nick VK4PP

Thank you.

Gary, Thank you for pointing that out to me. I see that now. 73s Ripley The words are mine but this iPad does what it will with them.

Gilles, the only naive questions are the ones not asked .....or something like that ;o) Arv, we (AQRP Wed lunch guys) were speculating that the Constant K filter design used on the uBITX was suspect

Ripley, stay mindful of the audio signal path through the K3 relay that also switches antenna for RX, TX. This is a common reported / resolved audio problem. Implemented in conjunction with the 'pop'

Hello Kees, Arv I am attentive to your discussions on relays. I am not a professional technician so I will definitely ask a silly question. But too bad I start. Could the relays be replaced by other

Nick, no replies posted so here goes... I don't have a "GOOD SA" but I have a good receiver and I would be keen to work on this with you. In particular if you get some boards made I would be happy to

It looks good, but I'm hoping that Al will find the print file in the next day or two. Let's wait until then to see if it shows up. Jack, W8TEE

Kees Some possible areas to look into: - Are there resonances in the relay activation path when (activated, or inactive)? Thinking about permeability change in relay coils when current is flowing? -

I think I am pretty close.? I do not have the OLED or enclosure to test so I would not be comfortable posting the file to the group not knowing if this even works.? Do you have access to a

You may have seen all the discussion on using AXICOM relays. Until that is flattened and I understand the "why" I am refunding your money for the K5BCQ LPF board kits which were ordered as I continue

The “ I can hear myself in the speaker when I transmit” problem has nothing to do with 45 mhz crystal filter board that I installed for spurious signal suppression on the higher bands. I confirmed

Metrics are for smart people. Note that the vertical separator is tangent to the OLED recess, which makes it perfect for wedging a 9V battery between the case and the separator. See below: Jack, W8TEE

A few years back I did a dummy load in much the same fashion Jack did, but using ten pieces, 510 ohm, 2 W resistors. Used flat copper flashing strips instead of wired to mount the resistors. Intended

Appreciate the input. Similar output from the computer audio output compared to my microphone. Most of my contacts have been with FT8. Keep looking at it and can't figure out why 20V and 24v outputs

I have been a QRP OP since my Novice License. I don't call out QRP. What difference does it make? If another station hears you and begins conversation that is all that matters. when we exchange

Jack, I haven't built your dummy load but figured I would take a shot at recreating the panel to help out those that need it. A few more dimensions would be very helpful. * thickness of panel *