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BBT Delivered Hy-Gain Penetrator 500 Today
- Thread starter Eastside
- Start date
Haven't had a opportunity to go out into the backyard to measure it. Will do so tomorrow morning.??
I assume they provide the tubing long enough to resonate on the CB. According to my 5/8ths vertical calculator, the length for resonance at 28.8 will be 20' 4". YMMV, depending on on the feed system. I will be using my trusty MFJ 259B to set the length correctly.
B
BOOTY MONSTER
Guest
idk for sure but if was me id think between 22-23 feet from tip to tip for 11 meters
would be a great starting place
would be a great starting place
it is a difficult question...i think they are covering their liability as far as producing a metal cb antennna here, but then they put a cb label on the box! who knows, enjoy it and be careful with install. no offense meant
here are original instructions for cb if you want to go that route http://www.cbtricks.com/ant_manuals/hygain/model_500/graphics/hy-gain_500_penetrator_1975_early.pdf
(end up with about 22'10")
or use bm's numbers to center it more for 10 and 11 meters
I talked to them on the phone just a few minutes ago and they could not tell me were they came up with 19 feet. He said he thought it was for the 10 meter phone area of the band at 28.3 to 28.5 but was not for sure. I mentioned that the old cb antenna was almost 23 feet in length and he got defensive about it saying it was not a cb antenna.
it is a touchy area, which is why i did not suggest calling, i did not figure you would get an answer. i spoke to tom before and he made sure I understood it was for 10 meters
just tweak it for what you need, they just covering their liability.
just tweak it for what you need, they just covering their liability.
IMO, this Hy-Gain antenna kit and the instructions were always designed to be constructed as fixed-tuned with no tuning instructions included. Hy-Gain either physically marked all the tubing elements and/or indicated in the manual how the exposed lengths for each tube was to be set.
If the parts are pretty close to those in the older kits, then I would use the measurements in the latest old manual for 27 mhz and forget about the reasons and the signage. Common sense should tell us that 19' feet is NOT correct for this particular styled antenna at 27 mhz, and is closer to 10 meters. If there are legal issues involved in any product, it is normal to be careful, and that too...is a good reason to NOT include any tuning instructions in the paperwork.
If you want to tune it for a different frequency, then you're on you own as to adjustments. A little math, and some "trial an error" should get you close.
If the parts are pretty close to those in the older kits, then I would use the measurements in the latest old manual for 27 mhz and forget about the reasons and the signage. Common sense should tell us that 19' feet is NOT correct for this particular styled antenna at 27 mhz, and is closer to 10 meters. If there are legal issues involved in any product, it is normal to be careful, and that too...is a good reason to NOT include any tuning instructions in the paperwork.
If you want to tune it for a different frequency, then you're on you own as to adjustments. A little math, and some "trial an error" should get you close.