Yaesu AD-2 diplexer

[thesavo]

So, I picked up a Yeasu AD-2 VHF/UHF duplexer at a recent ham fest. I wanted to use it with a dual band antenna, 2m radio and a GMRS radio. However the rating say 400--450 mhz. Since GMRS is 462 /467 mhz, would that rule out this diplexer?

There is very little documentation on this accessory. It is only mentioned in a few Yeasu transceiver user guides.

Any insight would be appreciated.
Savo

 

[AK9R]

However the rating say 400--450 mhz. Since GMRS is 462 /467 mhz, would that rule out this diplexer?

Possibly. Diplexers are designed with a passband. If the passband on this one is 400-450 MHz, it may attenuate frequencies at 462-467 MHz.

BTW, it's Yaesu.

 

[thesavo]

ooh. i thought it looked right. so the pass-band on the UHF side starts to drop off over 450 MHZ. Thank you for that clarification; and the other thing. I always have a hard time with their name.

 

[AK9R]

so the pass-band on the UHF side starts to drop off over 450 MHZ.

You'd have to sweep it with a spectrum analyzer to know for sure.

 

[K9KLC]

If you can get inside of it, you may be able to tweak around on it a little bit. I'd probably use a VNA of some sort. Even a Nano VNA would likely work to see what it's passing and what it's attenuating.

 

[thesavo]

Ohh. May be a reason to purchase some trat equipment or ask a friend. These are great. Thanks

 

[K9KLC]

Honestly a Nano VNA is pretty cheap in the grand scheme of things and while I've checked many antennas, feedline and such many years without one, now that I have one I can't imagine life without one.