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CX2SA > SATDIG 31.01.20 05:51l 859 Lines 30273 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. Re: [Video] Preamp test in front of radio / satellite ground
station build update (Hasan al-Basri)
2. Re: [Video] Preamp test in front of radio / satellite ground
station build update (Hasan al-Basri)
3. Re: [Video] Preamp test in front of radio / satellite ground
station build update (Bob)
4. Re: [Video] Preamp test in front of radio / satellite ground
station build update (Hasan al-Basri)
5. Re: [Video] Preamp test in front of radio / satellite ground
station build update (W3AB/GEO)
6. Re: [Video] Preamp test in front of radio / satellite ground
station build update (Zach Metzinger)
7. Re: [Video] Preamp test in front of radio / satellite ground
station build update (Selwyn Cathcart)
8. Just curious XW series (RG)
9. Re: Arrow Antennas for terrestrial work (Rick Tejera)
----------------------------------------------------------------------
Message: 1
Date: Tue, 28 Jan 2020 15:39:41 -0600
From: Hasan al-Basri <hbasri.schiers6@?????.???>
To: John Brier <johnbrier@?????.???>
Cc: AMSAT BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] [Video] Preamp test in front of radio /
satellite ground station build update
Message-ID:
<CAM4UQf1ujwp0APbBer=kG0LG2CVHTD1xkDPwvUB8xKy81FDx=w@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Hi John,
You referenced my old article in Amsat so I thought I would make some
observations that might help you. First, to evaluate the effect of the
preamp on FM you don't use the S-Meter at all, it will tell you have gain,
but tell you next to nothing about noise floor. What you need to do is find
a weak signal on FM, that has some noise on it that is caused by the weak
signal, not by another noise source. Do this with no preamp connected. Get
a feel for how much noise is present. Now, connect the preamp and what you
should hear is the background noise decreasing (in other words, better
quieting on the FM signal). If this happens, then you are benefiting from
the preamp. If this doesn't happen, then it is not helping, but we aren't
sure why. I will post more info in reply to your message on the amsat list.
Let's look at a better way to evaluate your preamp. Do these steps, it will
get you in the ballpark, without fancy test equipment:
0. No preamp connected.
1. Turn the agc off on your radio, if you can. If not, we can live with it.
2. Tune your radio to one of the satellite downlink frequencies like 145.733
(upper sideband, noise blanker off)
3. Disconnect your antenna from the radio.
3a. If you have a 50 ohm dummy load, connect it to your antenna. If not,
skip this step and leave your antenna connection open (no antenna)
4. Turn your RF Gain to Maximum. Turn your audio up to a reasonably high
level so you can clearly hear the noise.
5. Take notice of "how loud" the noise is
6. Now, connect your antenna (replacing the 50 ohm load, or replacing the
lack of an antenna.
Question: Did the noise level jump up markedly (a lot) when you connected
the antenna? (compared to the 50 ohm load or compared to no antenna)?
If it didn't, your rx sensitivity is poor. If it did, you can at least hear
your ambient noise level with your antenna and existing radio front end.
The good news is, if your ambient noise level is low, then you are doing
very well. If it is high, then your ambient noise level is artificially
killing some of your receiver sensitivity and a preamp won't be of much
help.
Now, let's evaluate the preamp:
Do the same procedure above, with the preamp connected, i.e.,
Take notice of the noise level with the 50 ohm resistor (or open antenna)
Resistor is better, but we use what we have. Set your audio volume so you
have a good "feel" for how much noise is from the resistor or open circuit
antenna.
*Now connect the antenna...did the noise jump up considerably , i.e. is the
noise from the antenna/preamp overriding the internal noise of your radio's
front end?*
If it jumped up, again, that's good.
To evaluate whether or not your local ambient noise is ruining the
effectiveness of your preamp or not, without fancy equipment you can do
this:
Have someone generate a weak signal on 2m FM, such that you have some
noticeable noise on the FM signal (with no preamp connected, but with your
antenna connected).
Note how much 'background' noise there is on that deliberately weakened FM
signal. Now, turn on or connect your preamp. Did the signal get quieter? If
it did, the preamp is helping. If it didn't, it isn't and one of two things
is taking place:
1. Your radio front end has as low a noise figure as your preamp. VERY
UNLIKELY if that is an ARR 2m GASFET preamp.
2. Your ambient noise is so high that the improved noise figure / noise
floor of your system is being masked by the external noise your antenna is
picking up.
Hope this helps,
73, Hasan, N0AN
On Tue, Jan 28, 2020 at 2:58 PM John Brier via AMSAT-BB <amsat-bb@?????.???>
wrote:
> Here is a little update on my satellite ground station build project
> and a demonstration of a test I did with my Advanced Receiver Research
> 2 meter preamplifier.
>
> https://youtu.be/BNai203eUnI
>
> 73, John Brier KG4AKV
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 2
Date: Tue, 28 Jan 2020 15:44:53 -0600
From: Hasan al-Basri <hbasri.schiers6@?????.???>
To: John Brier <johnbrier@?????.???>
Cc: Steve A <onmontauk@?????.???>, AMSAT BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] [Video] Preamp test in front of radio /
satellite ground station build update
Message-ID:
<CAM4UQf2ok8Ht7BMQVyqWoih=BGP-tDwG5wbWJMo3s7_D0=rsXQ@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
ARR Gasfet preamps for 2m are every bit as good as the SSB Electronics
ones. The issue is power handling. The SSB units handle high power, the
limit for a switching preamp on ARR's (that were still available) was 25
watts. I believe they stopped making the 160w jobs.
I think you can still get the ARR 25w RF switching preamps. I looked last
month and they were still available, but perhaps they have thrown in the
towel.
73, N0AN
Hasan
On Tue, Jan 28, 2020 at 3:38 PM John Brier via AMSAT-BB <amsat-bb@?????.???>
wrote:
> SSB Electronics has mast mount preamps that some people prefer over
> ARR, that I assume are comparable. But my googling produced a website
> that has an error loading.
>
> 73, John Brier KG4AKV
>
> On Tue, Jan 28, 2020 at 4:05 PM Steve A <onmontauk@?????.???> wrote:
> >
> > Now that Advanced Receiver Research has stopped production, is there a
> suitable replacement? I am looking for my ground station.
> > Steve W2AKK
> >
> > On Tue, Jan 28, 2020 at 3:56 PM John Brier via AMSAT-BB <
> amsat-bb@?????.???> wrote:
> >>
> >> Here is a little update on my satellite ground station build project
> >> and a demonstration of a test I did with my Advanced Receiver Research
> >> 2 meter preamplifier.
> >>
> >> https://youtu.be/BNai203eUnI
> >>
> >> 73, John Brier KG4AKV
> >> _______________________________________________
> >> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> >> to all interested persons worldwide without requiring membership.
> Opinions expressed
> >> are solely those of the author, and do not reflect the official views
> of AMSAT-NA.
> >> Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> >> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 3
Date: Tue, 28 Jan 2020 16:53:00 -0500
From: Bob <WB4SON@?????.???>
To: John Brier <johnbrier@?????.???>
Cc: Steve A <onmontauk@?????.???>, AMSAT BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] [Video] Preamp test in front of radio /
satellite ground station build update
Message-ID:
<CAPonRZ9OuMW9TxB8fx2yr-OA+LWpNNxNYiMtP52v7wYx-9F-bw@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
US Site for SSB-Electronics seems to be down.
The German site is still up:
https://www.ssb.de/en/amplifiers/preamplifier/vox/100w
See SP-200 and SP-70
73, Bob, WB4SON
On Tue, Jan 28, 2020 at 4:38 PM John Brier via AMSAT-BB <amsat-bb@?????.???>
wrote:
> SSB Electronics has mast mount preamps that some people prefer over
> ARR, that I assume are comparable. But my googling produced a website
> that has an error loading.
>
> 73, John Brier KG4AKV
>
> On Tue, Jan 28, 2020 at 4:05 PM Steve A <onmontauk@?????.???> wrote:
> >
> > Now that Advanced Receiver Research has stopped production, is there a
> suitable replacement? I am looking for my ground station.
> > Steve W2AKK
> >
> > On Tue, Jan 28, 2020 at 3:56 PM John Brier via AMSAT-BB <
> amsat-bb@?????.???> wrote:
> >>
> >> Here is a little update on my satellite ground station build project
> >> and a demonstration of a test I did with my Advanced Receiver Research
> >> 2 meter preamplifier.
> >>
> >> https://youtu.be/BNai203eUnI
> >>
> >> 73, John Brier KG4AKV
> >> _______________________________________________
> >> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> >> to all interested persons worldwide without requiring membership.
> Opinions expressed
> >> are solely those of the author, and do not reflect the official views
> of AMSAT-NA.
> >> Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> >> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 4
Date: Tue, 28 Jan 2020 16:12:02 -0600
From: Hasan al-Basri <hbasri.schiers6@?????.???>
To: Steve A <onmontauk@?????.???>
Cc: AMSAT BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] [Video] Preamp test in front of radio /
satellite ground station build update
Message-ID:
<CAM4UQf3aFNPQjjCZAs8gBB0t4iYQOt4LZRiTW0JCNBsDR77vDg@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
https://www.ebay.com/itm/Receive-Preamp-Masthead-RF-Switched-for-2m-type-RP2SM
-/282754438832
...and these are very good, from what I can tell:
https://www.minikits.com.au/electronic-kits/rf-amplifiers/rf-preamplifiers/eme
220-2m
Hasan
On Tue, Jan 28, 2020 at 4:02 PM Steve A <onmontauk@?????.???> wrote:
> I talked to him on the phone, and he says he is done. I even asked for
> some, I would pay extra, no reply.
> Steve W2AKK
>
> Sent from my iPhone
>
> On Jan 28, 2020, at 4:45 PM, Hasan al-Basri <hbasri.schiers6@?????.???>
> wrote:
>
> ?
> ARR Gasfet preamps for 2m are every bit as good as the SSB Electronics
> ones. The issue is power handling. The SSB units handle high power, the
> limit for a switching preamp on ARR's (that were still available) was 25
> watts. I believe they stopped making the 160w jobs.
>
> I think you can still get the ARR 25w RF switching preamps. I looked last
> month and they were still available, but perhaps they have thrown in the
> towel.
>
> 73, N0AN
> Hasan
>
>
> On Tue, Jan 28, 2020 at 3:38 PM John Brier via AMSAT-BB <
> amsat-bb@?????.???> wrote:
>
>> SSB Electronics has mast mount preamps that some people prefer over
>> ARR, that I assume are comparable. But my googling produced a website
>> that has an error loading.
>>
>> 73, John Brier KG4AKV
>>
>> On Tue, Jan 28, 2020 at 4:05 PM Steve A <onmontauk@?????.???> wrote:
>> >
>> > Now that Advanced Receiver Research has stopped production, is there a
>> suitable replacement? I am looking for my ground station.
>> > Steve W2AKK
>> >
>> > On Tue, Jan 28, 2020 at 3:56 PM John Brier via AMSAT-BB <
>> amsat-bb@?????.???> wrote:
>> >>
>> >> Here is a little update on my satellite ground station build project
>> >> and a demonstration of a test I did with my Advanced Receiver Research
>> >> 2 meter preamplifier.
>> >>
>> >> https://youtu.be/BNai203eUnI
>> >>
>> >> 73, John Brier KG4AKV
>> >> _______________________________________________
>> >> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
>> >> to all interested persons worldwide without requiring membership.
>> Opinions expressed
>> >> are solely those of the author, and do not reflect the official views
>> of AMSAT-NA.
>> >> Not an AMSAT-NA member? Join now to support the amateur satellite
>> program!
>> >> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>> _______________________________________________
>> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
>> to all interested persons worldwide without requiring membership.
>> Opinions expressed
>> are solely those of the author, and do not reflect the official views of
>> AMSAT-NA.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>>
>
------------------------------
Message: 5
Date: Tue, 28 Jan 2020 14:29:28 -0800
From: W3AB/GEO <w3ab@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] [Video] Preamp test in front of radio /
satellite ground station build update
Message-ID: <ee706aa8-6e40-4626-9abf-9369c573ed2e@?????.???>
Content-Type: text/plain; charset=UTF-8
I can vouch for the minikits preamp. Easy to build and align. Relatively low
noise figure
?___
Sent from my two way wrist watch
73 de W3AB/GEO?
On Jan 28, 2020, 14:21, at 14:21, Hasan al-Basri via AMSAT-BB
<amsat-bb@?????.???> wrote:
>https://www.ebay.com/itm/Receive-Preamp-Masthead-RF-Switched-for-2m-type-RP2S
M-/282754438832
>
>...and these are very good, from what I can tell:
>https://www.minikits.com.au/electronic-kits/rf-amplifiers/rf-preamplifiers/em
e220-2m
>
>
>
>
>Hasan
>
>
>On Tue, Jan 28, 2020 at 4:02 PM Steve A <onmontauk@?????.???> wrote:
>
>> I talked to him on the phone, and he says he is done. I even asked
>for
>> some, I would pay extra, no reply.
>> Steve W2AKK
>>
>> Sent from my iPhone
>>
>> On Jan 28, 2020, at 4:45 PM, Hasan al-Basri
><hbasri.schiers6@?????.???>
>> wrote:
>>
>> ?
>> ARR Gasfet preamps for 2m are every bit as good as the SSB
>Electronics
>> ones. The issue is power handling. The SSB units handle high power,
>the
>> limit for a switching preamp on ARR's (that were still available) was
>25
>> watts. I believe they stopped making the 160w jobs.
>>
>> I think you can still get the ARR 25w RF switching preamps. I looked
>last
>> month and they were still available, but perhaps they have thrown in
>the
>> towel.
>>
>> 73, N0AN
>> Hasan
>>
>>
>> On Tue, Jan 28, 2020 at 3:38 PM John Brier via AMSAT-BB <
>> amsat-bb@?????.???> wrote:
>>
>>> SSB Electronics has mast mount preamps that some people prefer over
>>> ARR, that I assume are comparable. But my googling produced a
>website
>>> that has an error loading.
>>>
>>> 73, John Brier KG4AKV
>>>
>>> On Tue, Jan 28, 2020 at 4:05 PM Steve A <onmontauk@?????.???> wrote:
>>> >
>>> > Now that Advanced Receiver Research has stopped production, is
>there a
>>> suitable replacement? I am looking for my ground station.
>>> > Steve W2AKK
>>> >
>>> > On Tue, Jan 28, 2020 at 3:56 PM John Brier via AMSAT-BB <
>>> amsat-bb@?????.???> wrote:
>>> >>
>>> >> Here is a little update on my satellite ground station build
>project
>>> >> and a demonstration of a test I did with my Advanced Receiver
>Research
>>> >> 2 meter preamplifier.
>>> >>
>>> >> https://youtu.be/BNai203eUnI
>>> >>
>>> >> 73, John Brier KG4AKV
>>> >> _______________________________________________
>>> >> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum
>available
>>> >> to all interested persons worldwide without requiring membership.
>>> Opinions expressed
>>> >> are solely those of the author, and do not reflect the official
>views
>>> of AMSAT-NA.
>>> >> Not an AMSAT-NA member? Join now to support the amateur satellite
>>> program!
>>> >> Subscription settings:
>https://www.amsat.org/mailman/listinfo/amsat-bb
>>> _______________________________________________
>>> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum
>available
>>> to all interested persons worldwide without requiring membership.
>>> Opinions expressed
>>> are solely those of the author, and do not reflect the official
>views of
>>> AMSAT-NA.
>>> Not an AMSAT-NA member? Join now to support the amateur satellite
>program!
>>> Subscription settings:
>https://www.amsat.org/mailman/listinfo/amsat-bb
>>>
>>
>_______________________________________________
>Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
>to all interested persons worldwide without requiring membership.
>Opinions expressed
>are solely those of the author, and do not reflect the official views
>of AMSAT-NA.
>Not an AMSAT-NA member? Join now to support the amateur satellite
>program!
>Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 6
Date: Tue, 28 Jan 2020 16:50:37 -0600
From: Zach Metzinger <zmetzing@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] [Video] Preamp test in front of radio /
satellite ground station build update
Message-ID: <b5b7c9f0-5107-7d9e-7559-a93c1b0c8a91@?????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
On 2020-01-28 14:56, John Brier via AMSAT-BB wrote:
> Here is a little update on my satellite ground station build project
> and a demonstration of a test I did with my Advanced Receiver Research
> 2 meter preamplifier.
Hello John,
As others have said, FM is not ideal for this testing.
Ideally, you'd want to run SSB and feed that into your rig. Then, take
the audio output and put it into Spectrum Lab or similar.
For a weak CW signal (less than 1 S unit), you should see a peak at the
signal just above the noise. This ensures that AGC is inactive, if it
can't be disabled.
Now, switch in the LNA. The CW tone should jump by the gain of the
preamp. Ideally, the noise floor will not change at all. If it does,
then the preamp is not a low-noise type or something else (overload) is
going on.
Even with low-loss coax, putting the LNA at the antenna is the right way
to do it. Use the following calculator to experiment with this lineup:
https://www.pasternack.com/t-calculator-noise-figure.aspx
(Noise-dB / Gain-dB)
Case 1: LNA (1/20) -> Coax (2.5/-2.5) -> Rig (6/90) == 1.2dB
Case 2: Coax (2.5/-2.5) -> LNA (1/20) -> Rig (6/90) == 3.6dB
You're giving up 2.4dB of NFdB for the convenience of putting it
indoors. The numbers above assume LMR-400 at 100' loss.
https://www.rtl-sdr.com/tutorial-on-properly-positioning-a-preamp-lna-in-a-rad
io-system/
Local noise sources, unless they are incredible broadband, won't impact
the usefulness of a quality LNA. The thing to look for here is
linearity, which is indicated by the 3rd order intercept (IP3) of the
LNA. Most modern designs have eye-popping linearity and noise figures as
compared to the lowly, ancient U310-based amplifier.
https://www.maximintegrated.com/en/design/technical-documents/tutorials/5/5429
.html
--- Zach
N0ZGO
------------------------------
Message: 7
Date: Wed, 29 Jan 2020 13:12:29 +1300
From: Selwyn Cathcart <zl2bjo@?????.???>
To: "AMSAT bbs" <amsat-bb@?????.???>
Subject: Re: [amsat-bb] [Video] Preamp test in front of radio /
satellite ground station build update
Message-ID: <01d101d5d638$cddaf850$6990e8f0$@?????.???>
Content-Type: text/plain; charset="utf-8"
IMHO A good Italian 50, 144 & 432mHz low noise masthead amplifier, at a
reasonable price?
https://www.jghitechnology.com/gb/30-vox-pole-mount-100w
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@?????.???? On Behalf Of W3AB/GEO via
AMSAT-BB
Sent: Wednesday, January 29, 2020 11:29 AM
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] [Video] Preamp test in front of radio / satellite
ground station build update
I can vouch for the minikits preamp. Easy to build and align. Relatively low
noise figure
?___
Sent from my two way wrist watch
73 de W3AB/GEO?
On Jan 28, 2020, 14:21, at 14:21, Hasan al-Basri via AMSAT-BB
<amsat-bb@?????.???> wrote:
>https://www.ebay.com/itm/Receive-Preamp-Masthead-RF-Switched-for-2m-type-RP2S
M-/282754438832
>
>...and these are very good, from what I can tell:
>https://www.minikits.com.au/electronic-kits/rf-amplifiers/rf-preamplifiers/em
e220-2m
>
>
>
>
>Hasan
>
>
>On Tue, Jan 28, 2020 at 4:02 PM Steve A <onmontauk@?????.???> wrote:
>
>> I talked to him on the phone, and he says he is done. I even asked
>for
>> some, I would pay extra, no reply.
>> Steve W2AKK
>>
>> Sent from my iPhone
>>
>> On Jan 28, 2020, at 4:45 PM, Hasan al-Basri
><hbasri.schiers6@?????.???>
>> wrote:
>>
>> ?
>> ARR Gasfet preamps for 2m are every bit as good as the SSB
>Electronics
>> ones. The issue is power handling. The SSB units handle high power,
>the
>> limit for a switching preamp on ARR's (that were still available) was
>25
>> watts. I believe they stopped making the 160w jobs.
>>
>> I think you can still get the ARR 25w RF switching preamps. I looked
>last
>> month and they were still available, but perhaps they have thrown in
>the
>> towel.
>>
>> 73, N0AN
>> Hasan
>>
>>
>> On Tue, Jan 28, 2020 at 3:38 PM John Brier via AMSAT-BB <
>> amsat-bb@?????.???> wrote:
>>
>>> SSB Electronics has mast mount preamps that some people prefer over
>>> ARR, that I assume are comparable. But my googling produced a
>website
>>> that has an error loading.
>>>
>>> 73, John Brier KG4AKV
>>>
>>> On Tue, Jan 28, 2020 at 4:05 PM Steve A <onmontauk@?????.???> wrote:
>>> >
>>> > Now that Advanced Receiver Research has stopped production, is
>there a
>>> suitable replacement? I am looking for my ground station.
>>> > Steve W2AKK
>>> >
>>> > On Tue, Jan 28, 2020 at 3:56 PM John Brier via AMSAT-BB <
>>> amsat-bb@?????.???> wrote:
>>> >>
>>> >> Here is a little update on my satellite ground station build
>project
>>> >> and a demonstration of a test I did with my Advanced Receiver
>Research
>>> >> 2 meter preamplifier.
>>> >>
>>> >> https://youtu.be/BNai203eUnI
>>> >>
>>> >> 73, John Brier KG4AKV
>>> >> _______________________________________________
>>> >> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum
>available
>>> >> to all interested persons worldwide without requiring membership.
>>> Opinions expressed
>>> >> are solely those of the author, and do not reflect the official
>views
>>> of AMSAT-NA.
>>> >> Not an AMSAT-NA member? Join now to support the amateur satellite
>>> program!
>>> >> Subscription settings:
>https://www.amsat.org/mailman/listinfo/amsat-bb
>>> _______________________________________________
>>> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum
>available
>>> to all interested persons worldwide without requiring membership.
>>> Opinions expressed
>>> are solely those of the author, and do not reflect the official
>views of
>>> AMSAT-NA.
>>> Not an AMSAT-NA member? Join now to support the amateur satellite
>program!
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>Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
>to all interested persons worldwide without requiring membership.
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>are solely those of the author, and do not reflect the official views
>of AMSAT-NA.
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_______________________________________________
Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
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Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 8
Date: Wed, 29 Jan 2020 00:29:30 +0000 (UTC)
From: RG <marzo7088@?????.???>
To: "amsat-bb@?????.???? <amsat-bb@?????.???>
Subject: [amsat-bb] Just curious XW series
Message-ID: <1929696336.497313.1580257770799@????.?????.???>
Content-Type: text/plain; charset=UTF-8
I have had trouble hearing XW satellites lately.I have a Kenwood ts 2000 and
for some reason don't hearing much if anything.I used to hear the beacon
pretty loud at least for a few moments and most of the pass okay but not as
much.I was wondering if other Op's. are having the same problem.Maybe I need
to set up? my 706 as a receive radio,It worked good.I dont have any problems
with the Kenwood working other modes.It would be nice to use one radio.I
run? a vertical and realize it's not the best set up but again I haven't had
this problem in the past.Just looking for some opinions.Thanks a
lot73RichKB1FGC
marzo7088@?????.???
------------------------------
Message: 9
Date: Tue, 28 Jan 2020 18:05:31 -0700
From: "Rick Tejera" <SaguaroAstro@???.???>
To: "'Fernando Ramirez'" <framirezferrer@?????.???>, "'Greg D'"
<ko6th.greg@?????.???>, "'AMSAT'" <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Arrow Antennas for terrestrial work
Message-ID: <017201d5d640$3697d9b0$a3c78d10$@???.???>
Content-Type: text/plain; charset="us-ascii"
I agree with Fernando. I used my Elk during the winter VHF contest and for
VHF/UHF simplex work on SOTA. The mounting is easily rotated to accommodate
vertical or horizontal polarization
Rick Tejera (K7TEJ)
Saguaro Astronomy Club
www.saguaroastro.org
Thunderbird Amateur Radio Club
www.W7TBC.org
-----Original Message-----
From: AMSAT-BB <amsat-bb-bounces@?????.???> On Behalf Of Fernando Ramirez
via AMSAT-BB
Sent: Monday, January 27, 2020 4:28 PM
To: Greg D <ko6th.greg@?????.???>
Cc: AMSAT <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Arrow Antennas for terrestrial work
In my opinion, the Elk Log Periodic is better suited than the Arrow for
permanent mounting.
The downside is the gain on 70 cm compared to an Arrow. Even then, it will
work. I used one during the June VHF contest and was able to work UHF with
20w to the same places I did on VHF with 50w (around 250 miles).
A plus is having both bands on the same polarization.
73
Fernando, KF7R
On Mon, Jan 27, 2020, 3:58 PM Greg D via AMSAT-BB <amsat-bb@?????.???>
wrote:
> Besides the mechanical issues that others have noted, one thing to
> consider is that the 2m / 70cm elements are at 90 degrees from each
> other. If you want to mix repeater and weak-signal uses, you may need
> a way to rotate the beam so that the polarization is optimized for the
> band and use you are engaged in.
>
> Greg KO6TH
>
>
> John Geiger via AMSAT-BB wrote:
> > Most of the reviews I have seen for the Arrow Antenna dualband yagis
> > are regarding their use on the satellites, which I think is what
> > they are mainly made for. Has anyone on the list used one of their
> > dualband antennas mounted permanently for terrestrial work as well?
> > They do sell
> a
> > mounting bracket for permanent mounting to a mast.
> >
> > Do they seem well made enough to withstand the outside elements for
> > a few years on end? Do they seem to perform as well as other
> > antennas which
> have
> > approximately the same boom size and number of elements?
> >
> > 73 John W5TD
> > _______________________________________________
> > Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum
> > available to all interested persons worldwide without requiring
membership.
> Opinions expressed
> > are solely those of the author, and do not reflect the official
> > views of
> AMSAT-NA.
> > Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> > Subscription settings:
> > https://www.amsat.org/mailman/listinfo/amsat-bb
>
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership.
> Opinions expressed are solely those of the author, and do not reflect
> the official views of AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
_______________________________________________
Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available to all
interested persons worldwide without requiring membership. Opinions
expressed are solely those of the author, and do not reflect the official
views of AMSAT-NA.
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Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Subject: Digest Footer
_______________________________________________
Sent via amsat-bb@?????.???.
AMSAT-NA makes this open forum available to all interested persons worldwide
without requiring membership. Opinions expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT member? Join now to support the amateur satellite program!
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------------------------------
End of AMSAT-BB Digest, Vol 15, Issue 21
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