Rick:

If my trig is correct, to get a g5rv in a 79 foot space, with the ends at 
ground level, hight of center will be 32 feet 3 and 1/8 inches.

Increase that by ten, and use ten foot poles to anchor your ends, and you'll 
be fine.
----- Original Message ----- 
From: "Rick" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, January 19, 2010 8:30 PM
Subject: Re: Cushcraft R7 and 75 meters.


> It actually works better than I thought it would.
> I've only made a few short contacts on 75 with it.
> I talked to Florida, Georgia, and Mississippi on it, and a couple other
> states I forget.
> It's just a temporary solution until I can get a wire up.
> I plan to put up a G5RV, but I need to figure out what I need first. Like
> how much mast I can get away with, and if I can use guy wire instead of
> rope.
> I plan to put it up as an inverted V, and I have a feeling that if I use
> rope somebody would keep cutting it.
> I don't have much room for antennas but I think I can squeeze in a G5RV
> along side the house.
> I have 79 feet there, and I think if I get the center up high enough I can
> fit the ends of a 102 foot G5RV into that space.
> I really don't know though.
> ----- Original Message ----- 
> From: "John Miller" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Tuesday, January 19, 2010 5:48 PM
> Subject: Re: Cushcraft R7 and 75 meters.
>
>
>> If the SWR can be brought down with the tuner, you *can* use it, but 
>> don't
>> expect much for performance out of it, and I would not run any power
>> through
>> it more than 100 watts. Fact is, at a special event setup around here a
>> couple years ago, I did run an R5 on 75 meters and it tuned, and worked
>> well
>> enough for me to check in to an  NTS net I was trying to check in to but
>> the
>> signal was down and really, for general 75 meter use it would not have
>> worked out. R7 is bigger, and will work better but I'd doubt if you'd be
>> happy with it, as compared to an antenna made for the band.
>> ----- Original Message ----- 
>> From: "Rick" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Tuesday, January 19, 2010 12:17 PM
>> Subject: Cushcraft R7 and 75 meters.
>>
>>
>>> Hi list.
>>> I know the R7 isn't designed to work on 75 meters, but with my TS-50 and
>>> =
>>> autotuner I can get an SWR of 1.4 to 1, and reflected power of 4.4.
>>> With the manual tuner I can get the SWR down to 1.0 to 1.
>>> I know I won't get out as well as if the antenna was designed for 75 =
>>> meters.
>>> What I want to ask is, can I use 75 and not hurt the antenna, or radio?
>>> Also would it hurt to run power through the r7 on 75?
>>> Thanks in advance for any help, and 7 3.