Mat, I believe the incandescent bulb is used as a fusible link for the SDR and is in series withe the coax center conductor. The neon bulb is supplying static protection. John, k0ebc
Thanks for the great video overview. I got mine today and replaced the MFJ switch for my Icom IC-9100. When I turned it on, the red TX light was lit, and SDR did not work (SDRUno). I finally figured out that even though I didn't need to connect anything to the "SEND" port in the back, I did need to put a plug into that port to defeat the transmit and allow receive to occur. Once I did that, SDRUno received perfectly with the TX light no longer lit until I was actually transmitting on the radio. The one drawback to this unit is a lack of instructions. Otherwise I love it.
Another quality video Mat. The SDR switch you featured 3 years ago is currently selling for $44 USD. The MX-S1 is $122 USD. How would you explain the cost difference? They both seem to do exactly the same thing although the cheaper one goes up to 160 MHz. Thoughts?
The MFJ unit has a control for the T/R switching delay with a minimum delay of, I believe, 50 milliseconds. This is too slow to support QSK keying. Does the MXS1 provide any indication of its switching delay time?
4 Relays, wow. I wonder how good the isolation is between TX and SDR at 60 MHz? I also wonder how they split the receive RF between the HF Transceiver and the SDR? Do they just connect them in parallel? I believe the Toroid in the right is probably for the SWR bridge, and I don't see anything that looks like a 2 way rf divider.
I tapped the IF on my TS-850 and could use an RTL-SDR receiver. It did not last long before RF in the shack blew the SDR chip. You have to be very careful about isolation.
Where did you find instructions about tracking the frequency of the transceiver and the SDR monitoring in SDR# (or other SDR software)? I assume you are using OmniRig, but I am searching for some modern days instructions 🙂
Is there any appreciable attenuation caused by this new kit? I watched a video just before this on a new feature in SDRAngel. I’m curious about the attenuation because the signal in the SDRAngel vid was neatly buried in the noise floor and if it had been attenuated even slightly the signal would’ve never been discernible. Thanks for the video!
in the first one you showed I'm working, but with the jumper to hear the reception sound from the transceiver it gives two outputs. One for the transceiver and one for the sdr, they have 25 ohm impedance each. Did they fix this? does anyone know?
Hi Mat, i purchased one of these but cant seem to get audio over to my SDR, no response when using ptt on radio. unit powers on and my radio rx’s but is unresponsive on the sdr side. thanks for the great content!
@@TechMindsOfficial Yes, I have the schematic of the plug but it has several pins relating to TX. There’s a TX INH, a TX GND, a TX D and a GND. It’s a new radio and I don’t want to violate the warranty if I blow it up. Thanks for your patients.
Yes, exactly that. But you need to connect an SDR to the SDR connection on the switch, as shown and demonstrated in the video. If you have the 7100, then check out one of my past videos where I show how to tap into the low level RX output. That way you do not need a switch. Cheers
@@danielymilva I've never used it but I think it just allows you to also switch the audio source as well. I suppose if you wanted to use monitor on the transceiver when transmitting for example. Then you'd have SDR audio only for receive.
Mat, I believe the incandescent bulb is used as a fusible link for the SDR and is in series withe the coax center conductor. The neon bulb is supplying static protection. John, k0ebc
Thanks for the great video overview. I got mine today and replaced the MFJ switch for my Icom IC-9100. When I turned it on, the red TX light was lit, and SDR did not work (SDRUno). I finally figured out that even though I didn't need to connect anything to the "SEND" port in the back, I did need to put a plug into that port to defeat the transmit and allow receive to occur. Once I did that, SDRUno received perfectly with the TX light no longer lit until I was actually transmitting on the radio. The one drawback to this unit is a lack of instructions. Otherwise I love it.
can you elaborate a little more? i just got mine and it wont send audio to my SDR, really unsure of what to do
make a vidoe on how to hook everything up from the begging to the end to the monitor please KD9JRU
Very nice and the fact that you can change frequencies at the same time is a plus.. Bringing life to old rigs!! Good stuff!
This is a relay with a baseband audio tap. I would add a diode in the SDR antenna line.
Another quality video Mat. The SDR switch you featured 3 years ago is currently selling for $44 USD. The MX-S1 is $122 USD. How would you explain the cost difference? They both seem to do exactly the same thing although the cheaper one goes up to 160 MHz. Thoughts?
Link to the $44 version?
th-cam.com/video/jKqXBvsrGsI/w-d-xo.htmlsi=VVPNWHCrVGjMoN9H
Bidenomics and inflation radio gear I bought 4 years ago at a good price now sells 50 to 100 percent more .
@@DCDura th-cam.com/video/jKqXBvsrGsI/w-d-xo.htmlsi=bbQMtEC6fDs-8uRW
The $44 dollar one comes from Banggood and I've had one 2 years on my FTDX10 for over 2y without problems.
Great piece of kit. I may need to look into it:)
The MFJ unit has a control for the T/R switching delay with a minimum delay of, I believe, 50 milliseconds. This is too slow to support QSK keying. Does the MXS1 provide any indication of its switching delay time?
4 Relays, wow. I wonder how good the isolation is between TX and SDR at 60 MHz? I also wonder how they split the receive RF between the HF Transceiver and the SDR? Do they just connect them in parallel? I believe the Toroid in the right is probably for the SWR bridge, and I don't see anything that looks like a 2 way rf divider.
Could you use this on a 10/12 meter rig?
Wouldn't a diode in the SDR antenna protect the SDR from any TX power from the radio going into the SDR ?
hi Mat, interessting as always. Does the unit come with manual because there are quiet some interfacing possibilities?
It looks nicer, but is it triple-the-price nicer?
I tapped the IF on my TS-850 and could use an RTL-SDR receiver. It did not last long before RF in the shack blew the SDR chip. You have to be very careful about isolation.
A very handy bit of kit Matt, the board looks very tidy
What’s the insertion loss of the switch?
Where did you find instructions about tracking the frequency of the transceiver and the SDR monitoring in SDR# (or other SDR software)? I assume you are using OmniRig, but I am searching for some modern days instructions 🙂
Thanks Mat! Another FB review. 73.
My pleasure!
I know it says that it's only rated up through 6m, but does anyone know if it will work on VHF/UHF, say up to 432 Mhz?
Is there any appreciable attenuation caused by this new kit? I watched a video just before this on a new feature in SDRAngel. I’m curious about the attenuation because the signal in the SDRAngel vid was neatly buried in the noise floor and if it had been attenuated even slightly the signal would’ve never been discernible.
Thanks for the video!
Thanks, Matt 👍
My pleasure!
in the first one you showed I'm working, but with the jumper to hear the reception sound from the transceiver it gives two outputs. One for the transceiver and one for the sdr, they have 25 ohm impedance each. Did they fix this? does anyone know?
Nice, I wish at had auto sense on transmit. Many of my radios dont have a PTT TRX to send to this device
Which radios? I’m sure there would be a way, even if an adapter of some kind was made inline with the mic plug.
I tested the switching by shorting two wire ends so there's going to be a way to do this somewhere in the PTT chain.
The discount code is not working outside UK and Australia 🙂
Looks like it worked for me in the US.
Hi Mat, i purchased one of these but cant seem to get audio over to my SDR, no response when using ptt on radio. unit powers on and my radio rx’s but is unresponsive on the sdr side. thanks for the great content!
Hi ya, please detail how you have everything wired.
@@TechMindsOfficial I appreciate the reply, i ended up figuring out what the problem was and have it working now. Much nicer than the MFJ version.
Can you provide the pin IDs for the Yaesu plug?
Look in the radios manual, it will be there.
@@TechMindsOfficial Yes, I have the schematic of the plug but it has several pins relating to TX. There’s a TX INH, a TX GND, a TX D and a GND. It’s a new radio and I don’t want to violate the warranty if I blow it up. Thanks for your patients.
Well done as usual!!! Thanks Mat!! 73 de N9RAN
Thank you too!
Can you explain exactly what this does ? I have the 7100 too. Does this provide a full color scope on your computer?
Yes, exactly that. But you need to connect an SDR to the SDR connection on the switch, as shown and demonstrated in the video. If you have the 7100, then check out one of my past videos where I show how to tap into the low level RX output. That way you do not need a switch. Cheers
Great ...
I have (and still prefer) the old one - this is almost triple the price for a few LED's...
Hi, I also have the "old" one but have difficulties to figure out for what there are these sockets SDR, TRX, AUDIO OUT. Can you help?
@@danielymilva I've never used it but I think it just allows you to also switch the audio source as well. I suppose if you wanted to use monitor on the transceiver when transmitting for example. Then you'd have SDR audio only for receive.
@@stewartrv Thank you for your feedback Sterwart. Will try this.
Nice overview video, God bless.
jai un mfj mes sa fonctionne pas beaucoup derf dans le sdr
De vu2sto