Is That Radio Really Safe?

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Concerned about the safety of your radio? In this video, we dive into a popular radio/antenna switch to figure out if it's as good as the manufacturer states in the documentation. This switch is rated for fairly high power, and I want to know if I can trust the docs for it. Does it really allow me to run 2 radios and two antennas at the same time? Can I switch between them safely?
Learn about RF isolation, RF switches, and more in this video to ensure your radio is safe to use.
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Опубликовано:

26 апр 2024

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Комментарии : 24

@TheSmokinApe 12 дней назад

Solid work Jeem

@Puttertorium 10 дней назад

Nice test Jim and it confirms my suspicions regarding RF switches in general. I have several switches for multiple antennas but I built a manual patch panel for the transceivers so that at no time, are two radios connected to the system. I agree with your summary as well, $100 switch, multi-$1000 radio. Keep them separate!

@rickbaish7199 12 дней назад

Thanks Jeem, good information to keep in mind.

@ScottGrammer 11 дней назад

Forty-seven years in electronics have taught me that slide switches are garbage I would not trust that thing.

@MrDmjay 12 дней назад

Good PSA. Thank you.

@ronwolenski-n8wcr 13 дней назад

I read it as the switches are rated at 300 watts before it burns up, not the isolation would be 100 watts. Isolation would be stated as dB, not in watts. The 100 watts is meant to be how much power the contacts on the switch it can handle.

@FEPLabsRadio 13 дней назад

You may be on to something there, that's an interesting point. If that's what they're saying, it's subtle as can be. However, the only number mentioned is 300W. Also, I was a little slack in using the correct term db vs dbm in the right places. No they don't mention isolation, but if it's rated at 300W, that implies very strongly, that there is at least 55dbm of isolation, even though they don't mention isolation. Since they pimp this thing as a radio/xcvr switch, and don't mention anything other than "don't switch while xmitting" (duh), again, it implied to me originally that i can have 2 radios on this thing, with two antennas, potentially both on. It may just be bad documentation, but clearly, she won't handle 300W as there ain't 55db of isolation between the two connections. Thanks for watching, Ron!

@stevencristofero968 13 дней назад

Good info Jim.

@WECB640 13 дней назад

Excellent analysis Jim. Bravo. I think I'd be timid, but OK if I put 30 watts into this device, but certainly not 300 watts. Perhaps it's a typo in the MFJ labeling / PR dpt. It is simply a DPDT sliding switch that is not designed for RF and certainly has no isolation between contacts. 73 OM

@marcfeakins1158 13 дней назад

Thanks for the video. I've had one of these sat on my desk for 6 months. You kind of confirmed my thoughts. I know there're a lot MFJ fans out there, but my experience with their products is not great. I have a NanoVNA so will attempt to replicate your test. 73

@FEPLabsRadio 13 дней назад

Glad I could help!

@MikeN2MAK 12 дней назад

Dingleberry 🤣 Great job, Jim.

@ToiToiTrimmer 13 дней назад

Is that your community service uniform shirt you are made to wear ? Informative vid, cheers mate 😊

@DonzLockz 12 дней назад

Thanks Jeem. I dont have any of their products but its a shame they're shutting down. There will be a huge hole in the market.🍻🤠

@porcoutah9967 13 дней назад

I will say most of HF radio can handle power level of 10mW +10dBm into receiver without getting damaged , so from 100 watts 50 dBm , 50 dBm - 10 dBm = 40 db. it may only need 40 db isolation. if the Receiver can handle 100mW 20 dBm, it only need 30 db isolation. AG6JU

@FEPLabsRadio 7 дней назад

Yes, I've heard that as well. I suppose it's a matter of trusting that. I would say, if I see it in the manufacture manual, I'd for sure believe it.