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This panadaptor looks perfect as an addition to the qcx mini etc.

A description can be seen here:?https://youtu.be/jKqXBvsrGsI

Nice idea. But then the QCX-mini is by far the smallest part of the whole setup.

This is just an antenna switch.
You supply a RX and panoramic display yourself.

73 Alan G4ZFQ

Hi Alan, correct, but you can buy a RTL SDR usb adaptor for very little expense. I think mine cost around 20 euros.

Paul DJ0CU

Would a panadaptor be pretty useless with a direct conversion receiver though, because you'd see a whacking great big signal at the frequency of the QCX?

Trystan

Would a panadaptor be pretty useless with a direct conversion receiver though, because you'd see a whacking great big signal at the frequency of the QCX?

No, SDRs are direct conversion. Many do not avoid this situation although it is suppressed to varying degrees. The exact centre is best avoided in many SDRs
Note that the actual local oscillator is right at the centre and the ADC sees it as zero Hz. No actual response at 0Hz.

73 Alan G4ZFQ

On 29/10/2021 11:38, Alan G4ZFQ via groups.io wrote:

What I wrote below probably makes little sense, SDR is not easily explained. Note that all Hans' receivers are SDR front ends.
2 mixers, I and Q signals produced and cancelled.

I do not know where the basics are presented simply. I wrote something on this page and other Softrock pages in a crude attempt to explain.

This refers to soundcard SDR which is what you get when you feed IQ signals to a soundcard but fundamentally any SDR is the same.

73 Alan G4ZFQ

Trystan

Would a panadaptor be pretty useless with a direct conversion receiver though, because you'd see a whacking great big signal at the frequency of the QCX?

No, SDRs are direct conversion. Many do not avoid this situation although it is suppressed to varying degrees. The exact centre is best avoided in many SDRs
Note that the actual local oscillator is right at the centre and the ADC sees it as zero Hz. No actual response at 0Hz.

I have a PX3 Panadapter for my Elecraft KX3. I have wondered whether it could be adapted to my QCX radios.

On 29/10/2021 12:44, K9NUD-Steve wrote:

I have a PX3 Panadapter for my Elecraft KX3. I have wondered whether it could be adapted to my QCX radios.

Steve,

Possibly, it depends on what frequency (IF?) it is designed to work with and if you can convert to that frequency.

Maybe easier is to feed the QCV IQ to a soundcard and use a SDR program.

73 Alan G4ZFQ

Hi

The PX3 expects an audio I and Q input. It's the P3 that needs an IF signal.

Jim? G4EQX

The PX3 expects an audio I and Q input. It's the P3 that needs an IF signal.

Jim

Yes, I've looked at the manual.... and the price!
Looks like it could work Steve, just be careful.

I'm not sure how much bandwidth you'd get. On the QCX C43-46 would have to be considerably reduced and IC5's feedback changed.

73 Alan G4ZFQ

This video shows usage with SSB, which is fine.? However,? with QCX in full QSK mode, the T/R switch is much faster than in SSB mode.? ?Also need to consider QCX output of PPT is high(+5) for transmit,? low for receive, while most transceiver , and I believe this T/R switch expect? low ( ground) for transmit, high (float) for receive.??