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Subject:
From:
Tom Behler <[log in to unmask]>
Reply To:
For blind ham radio operators <[log in to unmask]>
Date:
Fri, 22 Nov 2013 19:05:42 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (154 lines)
That's very likely going to be my next plan of attack, Dave, if I can't get 
some sort of magmount to work better.

I don't know if it will work, but it certainly will be cheap enough to try.

Tom Behler: KB8TYJ

----- Original Message ----- 
From: "Dave Marthouse" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, November 22, 2013 6:03 PM
Subject: Re: Jetstream, JTM3BM,


> Tom,
>
> Have you thought of a j-pole made of 300OHM twinlead.  There have been
> articles about them over the years.  Maybe you can obtain one and hang it 
> in
> front of your office window and see what happens.
>
> Dave Marthouse N2AAM
> [log in to unmask]
>
>
>
> -----Original Message-----
> From: For blind ham radio operators [mailto:[log in to unmask]]
> On Behalf Of Tom Behler
> Sent: Friday, November 22, 2013 5:57 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
>>>
>>
> 

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