Tom, I have a feed through wire I used when I rented.  It  uses RG174 and is 
probably 16 inches long.  It has SO239 connectors on each end.  The idea is 
that you can put it through a window, close the window almost totally on it, 
and connect your rig to an outside antenna.  I used one on HF and one on 
VHF, UHF and while there was some loss I am sure, it let me use outdoor 
antennas without having to punch holes through my apartment wall.  73, Jim 
WA6EKS


-----Original Message----- 
From: Tom Behler
Sent: Friday, November 22, 2013 2:57 PM
To: [log in to unmask]
Subject: Re: Jetstream, JTM3BM,

    Ron:

Well, I'll give the other antenna some thought, although I'm a bit reluctant
to purchase it, only to find out that it still can't overcome my challenging
conditions in the office.

May try making a wire j-pole to try next.

Will be a lot cheaper, and I still have your instructions.

Oh, what I would give for an office window I could open!!  (grin)

Tom Behler: KB8TYJ

----- Original Message ----- 
From: "Dr. Ronald E. Milliman" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, November 22, 2013 4:47 PM
Subject: Re: Jetstream, JTM3BM,


> Tom, the Jetstream JTM3BM is about 43" from top to bottom including the
> mag-mount base. It is a 1/2 wave on 2 m and two 5/8 waves on 440. However,
> if your other mag-mounts didn't work, I doubt if this one would; though,
> admittedly, it out-performs my other two mag-mount antennas. Jetstream
> sells
> one that is even better than the one I have in terms of the gain. The only
> reason why I didn't purchase the other one is because it has more coils in
> the whip and presents slightly more wind load, and I was afraid it might
> come off the top of the van when we were traveling at high speeds on the
> interstate. Here is the information on the other one I almost purchased
> that
> has slightly better gain figures:
>
> JETSTREAM JT7505BM
> Dual band (2m/70 cm) mobile antenna with mag-mount
> 3.5/6.0 DB gain -- R & L price: $49.95
>
> As you can see, it has 3.5 db gain on 2 m compared to 3 db for the one I
> purchased and 6.0 db on 440 compared to 5.5 for the one I purchased. For
> my
> purposes, I felt the lower wind load out-weighed the slightly higher gain.
> So, I purchased the JTM3BM. There is a difference of $10 in the price, but
> that was not a factor at all in my decision. For you, if you want every
> possible db gain you can get, the JT7505BM might be a better choice for
> you.
> It is also slightly longer, by about 1 or two inches, I believe, in case
> that is a consideration.
>
> My suspicion is that you are just in a very poor place with too many
> obstacles that are blocking and/or shielding your signal from getting out.
> Evidently, you don't have a window that you can open, right? If you did,
> you
> could jury-rigged something that would work.
>
> Ron, K8HSY
>
>
> -----Original Message-----
> From: For blind ham radio operators [mailto:[log in to unmask]]
> On Behalf Of Tom Behler
> Sent: Friday, November 22, 2013 1:17 PM
> To: [log in to unmask]
> Subject: Re: Jetstream, JTM3BM,
>
> Ron:
>
> How long is this antenna?
>
> I am still struggling with accessing the local 2-meter repeater in my area
> from my University office.  The repeater is only about 10 miles from my
> office, but my office window is facing exactly in the wrong direction.
> Furthermore, the steel in the office building, and all of the computer
> electronics in my office and the offices around me are, I think, further
> degrading my situation.
>
> I've already tried a magmount antenna with a cookie sheet as a ground
> plane,
> but no joy.
>
> This antenna may be worth my looking at.
>
> Tom Behler: KB8TYJ
>
> ----- Original Message -----
> From: "Dr. Ronald E. Milliman" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Friday, November 22, 2013 2:03 PM
> Subject: Jetstream, JTM3BM,
>
>
>> Colleagues, just to share with you, I received a new Jetstream, JTM3BM,
>> mag-mount antenna today from R & L Electronics. This is a dual band, 2
>> meter/70CM antenna rated at 3 DB gain on 2 meters and 5.5 on 70 CM. I am
>> extremely impressed with this antenna. It is very well built, has an
>> excellent magnet and out-performs any of my other mag-mount antennas. The
>> 2
>> meter repeater is about 25 miles from me, and I can hit it easily, at
>> full
>> quieting, on 1 watt with the new Jetstream antenna. It was only $39.95
>> from
>> R & L, including the antenna, base, and 16 1/2' of coax. If you are
>> looking
>> for such an antenna, I highly recommend this one.
>>
>> Ron, K8HSY
>>
>