Icom 7300 IF output adaptor, finally

The G4HUP designed buffer amp is now being sold by SDRKits in the UK if that helps.

https://www.sdr-kits.net/index.php?route=product/category&path=66_73_84

Frank

 

I had a reply from Radio Analog:

Hi Frank,

Thank you for your interest and we appreciate your valuable feedback.
As you see in homapage text, we mentioned that ICOM-7300 is direct sampling receiver. We know that there is no frequency conversion but actually we havent find better term than IF and supposed every amateur know how their rigs works already. Taking your feedback seriously we are going to add a short explanation.

Keep watching website for updates please.

Kind regards,
Radio Analog Team.

 

This made my day...

73/
Karl-Arne
SM0AOM

 

@VE7BPB

I had another look at the PTRX-7300. I think I get it now. The following features are of interest:

Dual Receivers Mode: YES
Simultaneous Operation: YES
RX/TX Monitoring: YES
SDR Port to RF tap Point Isolation: High (>60 dB (average), Amplifier Reverse Isolation)

If you are getting one, please let us know how it performs in actual use.

 

For me, this solution is too restrictive.
Having the band pass filters in line will no doubt help a cheap SDR dongle but this comes at a cost.
The band pass filters restrict any second RX's usefulness to the band currently selected. With the higher bands, the filter bandwidths are greater but operating on say 80m, the 2nd RX could not be used on a different band.

Having two receivers on the same band is not something I need.

Frank

 

Hmm, i'm fairly tempted to try one out with my SDR Play.

 

My main rig is a Flex 6400, but I also own am Icom IC-7300 and and SDRPlay RSP1A receiver. When working DX pileups, I often use the Flex's second receiver slice to listen to the stations calling the DX. This usually help me figure out the split more quickly than just parking on a clear spot and calling blindly. I never really use the second receive slice to listen to another band, so the PTRX-7300 might allow me to the same thing by using my RSP1A as a second receiver with the IC-7300.

I would love to see a review on PTRX-7300 and see if this works as advertised. This might not be a bad upgrade for my style of operating.

 

I suppose the PTRX-7300 would not resolve the typical time lag between the TRX and SDR processing? I currently use a RSP1a and it lags maybe 0.3 seconds behind my TS 450. Not much but enough to be annoying and too late in pile up situations. I guess it’s due to the computer processing and since PTRX-7300 simply provides a different signal source the time lag would still apply? Anyone with any experience on this?

 

It looked interesting until they grabbed new distributors and jacked up the price. I would be interested to see if someone does a direct comparison of the cheeper versions vs their new fancy one.

 

I made this one for split IF(RF) to FLEX-1500. It works fine.
Technically loose 3dB because of split 50:50, but I could not recognize so many differences with my ears.
I don't have the IC7300 here, but I remember that the connection place is before the band pass filter of IC7300.
So I could hear like 15m FLEX-1500 and 20m IC7300 at a time with my dual-band antenna.