I note it states upto 30MHz. Given that I will switch it with the PTT control line could I also pass UHF / 437MHz at 5watts safely through this device ??

@TheArtofEngineering

17 күн бұрын

No idea, but doubt it will work well? The attenuation will be very high and perhaps the SWR. I still need to check the attenuation, as rumour has it that attenuation even within the quoted frequency range is high?...let me know if you find out! 73 de VK2AOE

Mate, looks like a perfect switch for SDR pan adapter. Will have to investigate it. Good content as always.

@TheArtofEngineering

9 ай бұрын

Yes it works well...but if you like SSB, you will need to use the PTT input as the relay chatters (i.e. it works but will drive you mental with the noise without it). Thanks for the comment. Been having fun of late! 73 de VK2AOE

@klejzbigniew

9 ай бұрын

I'm trying to free up some time so I can setup my workshop.

why not swap out the female pl259s for some chassis mount BnC jacks and not use the adaptors.

@TheArtofEngineering

5 ай бұрын

Yes would lower insertion loss. I still need to check this out. Thanks for the comment 73 de VK2AOE

Does the mfj 1708 .. have that feature of Dual Receive when jumper is removed ???

@TheArtofEngineering

3 ай бұрын

Sorry not sure about that? I bought the switch as I’m going to build a receive only loop to use with my Airspy SDR receiver. 73 de VK2AOE

@jorgezuni2818

3 ай бұрын

@@TheArtofEngineering 73”

Time, time, I wish I had more time! Two Yes's. Yes the construction looks to be very sturdy and well put together. Yes, there is nothing like single malt. 73 VK5WB

@TheArtofEngineering

9 ай бұрын

Yes...but too many times the single malt has resulted in the release of smoke!! 😆😆🤣🤣 73 de VK2AOE

I just received one in the mail. I thought I would need the PTT connection to a radio to disable the transmit to the SDR. Does it just disconnect when you transmit? So you only have power, antenna and sdr connected?

@TheArtofEngineering

6 ай бұрын

Technically yes it disconnects. Other users I researched said quick enough not to damage SDR. I use 5 watts QRP and it worked without PTT and didn’t cook my Airspy SDR …. BUT on SSB the relay chatter will drive you mad and wear the relay out prematurely. Also I’m yet to check attenuation on it. It also will not detect lower QRPP type rigs ( which is what I wanted it for). I did hook up the PTT on my Hermes and it worked well that way (less clatter etc). 73 de VK2AOE.

Too much insertion losses on this device

Great! I have one too, i was think about to make a mod for J5 jumper and put a "on/off switch! on the front but if i do need to use cable and those need to be shield can make interference or or problem? 73 de iz3qvb

@TheArtofEngineering

8 ай бұрын

Actually not sure if the switch would cause a problem? My guess would be it would not cause issues… but ONLY a guess ! 😂 73 de VK2AOE