Antenna Sweeps

[tweiss3]

Does anyone have sweeps of the Diamond X300a or the Comet GP6? I'm in need of a 10' dual band antenna that will handle GMRS + VHF ham, and unfortunately I can't get a hold of a DB-315.

[mbrun]

I have the GP6 for my amateur rig. If performs much better on VHF than UHF. Works well for Amateur stuff, but not well for GMRS. I use use the GMRS version of the Comet 712 for use that.

I can perhaps take some screen hots of the VNA this evening and post them if someone does not get them for you before then.


Michael
WRHS965
KE8PLM

[tweiss3]

20 minutes ago, mbrun said:

I have the GP6 for my amateur rig. If performs much better on VHF than UHF. Works well for Amateur stuff, but not well for GMRS. I use use the GMRS version of the Comet 712 for use that.

I can perhaps take some screen hots of the VNA this evening and post them if someone does not get them for you before then.


Michael
WRHS965
KE8PLM

Thanks. Both cut off their claimed performance at the edge of the band. I suspect the X300a would be better, as the dip on the GP6 looked pretty sharp.

[axorlov]

Not exactly what you are asking for, but I hope it helps: I have Diamond X50NA, and the SWR tests I did replicated the graph in the factory manual quite precisely.

[mbrun]

Thanks. Both cut off their claimed performance at the edge of the band. I suspect the X300a would be better, as the dip on the GP6 looked pretty sharp.

Here are the sweeps of my GP6 off a freshly calibrated VNA.






GMRS band is tolerable. Not as bad as I recalling.

Good luck.


Michael
WRHS965
KE8PLM

[tweiss3]

12 hours ago, mbrun said:

Here are the sweeps of my GP6 off a freshly calibrated VNA.






GMRS band is tolerable. Not as bad as I recalling.

Good luck.


Michael
WRHS965
KE8PLM

That really isn't bad at all, actually quite comparable to the commercial UHF antenna I have. Actually looks similar to the Tram1480 I have for my base station. Thanks for the input.

 

 

Anyone have the X300a they could sweep?