I've heard of them for VHF/UHF, not HF but they may be out there. If they 
are, I'd go with the usual rule of thumb, the best feedline you can get away 
with. Here my HF antenna has RG-213 but for something stealth that might not 
be best.
----- Original Message ----- 
From: "Shawn Pearson" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, July 03, 2012 4:54 PM
Subject: vent pipe antennas suitable for hf?


> Hello List:
>
> Does anyone have experience with vent pipe(stealth antennas for the hf =
> amateur  bands?
>
> If so, do they slip over the existing vent pipe on the roof?  Are they =
> "tunable, and what type of transmission line is recommended between the =
> antenna, and transceiver?  Lastly, is there a limit to the output power =
> they can handle, and what is the approximate cost?
>
> Sincerely yours,
>
>
>
> David S. Pearson-wa4dsp