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CX2SA > SATDIG 13.01.11 02:04l 847 Lines 29805 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Elk vs Arrow (Clint Bradford)
2. Re: Yaesu FT-8800 (Zachary Beougher)
3. Re: Yaesu FT-8800 (Clint Bradford)
4. Re: Yaesu FT-8800 (Zachary Beougher)
5. Re: Yaesu FT-8800 (Patrick STODDARD (WD9EWK/VA7EWK))
6. Re: Yaesu FT-8800 (Ernie Howard)
7. Re: Yaesu FT-8800 (Edward R. Cole)
8. Re: Elk vs Arrow (John Neeley)
9. TH-D7A Transmit Issues - Or Maybe Arrow Issues????
(Zachary Beougher)
10. Re: Yaesu FT-8800 (Ari Kosonen)
11. Re: TH-D7A Transmit Issues - Or Maybe Arrow Issues????
(Zachary Beougher)
12. Re: Zack's Setup (Clint Bradford)
13. Re: Zack's Setup (Clint Bradford)
14. Re: Zack's Setup (Zachary Beougher)
15. Re: TH-D7A Transmit Issues - Or Maybe Arrow Issues????
(Edward R. Cole)
16. Re: TH-D7A Transmit Issues - Or Maybe Arrow Issues????
(Rick Tejera)
----------------------------------------------------------------------
Message: 1
Date: Wed, 12 Jan 2011 12:03:25 -0800
From: Clint Bradford <clintbrad4d@xxxxxxxxx.xxx>
Subject: [amsat-bb] Elk vs Arrow
To: amsat-bb@xxxxx.xxx
Message-ID: <6790169F-32E5-4803-9FAA-1271D7F82038@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
>> ... The Arrow does not publish any gain numbers ...
>> ... ELK publishes the normal numbers you would expect ...
Now, after reading previous posts the past day on this, the FIRST thing that
comes t mind is whether or not the writer got his antenna as a freebie as he
demeans other antenna alternatives ... AND I WISH NONE OF US HAD TO THINK
LIKE THIS.
Because a writer here wrote a mini-review of the Elk, and stated it was
"very impressive" as compared to the Arrow. I have to tip my cap to him for
his honesty - he apparently (and hopefully!) won't let "availability of
freebies" sway his opinion of actual performance. But another AMSAT member
is "impressed" with receiving free equipment - which is being shown to cloud
the truth as to performance between competing equipment.
Some think Arrow's owner is "arrogant" in that he didn't commission a formal
test on the gain of his antennas. On the other hand, those of us that have
used them know that they work. I had an engineer client purchase one from me
back when I worked for HRO about five years ago. He was standing outside,
waiting for me to open shop the next morning, carrying his Arrow to return.
"This cannot possibly work," he adamantly exclaimed. "It is engineered all
wrong. I want a refund."
Because i had recommended the product due to me own personal experience with
them, part of me wanted to professionally "challenge" him and learn more
about his overnight experience with the Arrow. But seeing how determined he
was about it being "engineered all wrong," I changed my thinking to, "Hey, I
can purchase it myself at a "open item" discount."
And I did. And it is the VERY SAME antenna I use to this day for demos and
presentation.
BUT - back to the last few messages. What should we all learn?
Unfortunately, we now have to think "behind the scenes" when we read felow
AMSAT members' product reviews. We're seeing the fact that some vendors give
away products has been able to sway and taint honest reporting.
Clint Bradford, K6LCS
909-241-7666
------------------------------
Message: 2
Date: Wed, 12 Jan 2011 15:40:26 -0500
From: "Zachary Beougher" <zack.kd8ksn@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Yaesu FT-8800
To: "Clint Bradford" <clintbrad4d@xxxxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <SNT111-DS228564C07CD10E62121D41B3F10@xxx.xxx>
Content-Type: text/plain; format=flowed; charset="utf-8";
reply-type=original
Hi Everyone!
I don?t mean to be the odd guy on the block, but I do not like the 8800 for
satellite work. I enjoy the full duplex function, and it is very easy to
maneuver through the frequencies/bands using the mic, but I do not like the
receive sensitivity. Every time I have tried to use it for satellite work I
feel like I fight it the entire time trying to get a strong signal. I can?t
exactly make a very accurate judgment on it either since I have only used it
a few times. If others say it works well, I would have to go with the
general consensus since I don't use it much. The 2 THG71As, and now the
THD7A and 1 THG71A (yeah, I know the D7 is full duplex, but that is another
story) are my regular satellite equipment.
73!
Zack
KD8KSN
-----Original Message-----
From: Clint Bradford
Sent: Wednesday, January 12, 2011 2:19 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Yaesu FT-8800
Great for sat work - like Patrick mentioned.
For portability, I have installed mine in an ice chest ... photos at ...
ttp://tinyurl.com/cooler-radios
Clint Bradford, K6LCS
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 3
Date: Wed, 12 Jan 2011 12:43:53 -0800
From: Clint Bradford <clintbrad4d@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Yaesu FT-8800
To: "Zachary Beougher" <zack.kd8ksn@xxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <FFAB7D55-C04D-4705-A60F-CA1F567F4341@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
>> ... I do not like the receive sensitivity ...
Hmmm ... I just didn't experience that. Does your '8800 work fine for
local/repeater work?
Clint, K6LCS
------------------------------
Message: 4
Date: Wed, 12 Jan 2011 15:51:23 -0500
From: "Zachary Beougher" <zack.kd8ksn@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Yaesu FT-8800
To: "Clint Bradford" <clintbrad4d@xxxxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <SNT111-DS5E80A659B05D99EF2EA44B3F10@xxx.xxx>
Content-Type: text/plain; format=flowed; charset="utf-8";
reply-type=original
The 8800 is sweet for everything else that I use it for - repeaters, x-band
repeat (handy function!), simplex, you name it, but I never seemed to have
good success using it for satellite work. Maybe I need to pull it out again
and give it another try.
Like I said, I can?t make an accurate judgment on it since I have only used
it a few times. I do know that in my experience the receive sensitivity of
radios (of the same make/model) differ from radio to radio. I have 2
THG71As sitting on my desk that are proof of that. I have to use a certain
one for receive because the other one doesn?t produce as good results.
Just my 2 cents.....
Zack
KD8KSN
-----Original Message-----
From: Clint Bradford
Sent: Wednesday, January 12, 2011 3:43 PM
To: Zachary Beougher
Cc: amsat-bb@xxxxx.xxx
Subject: Re: Yaesu FT-8800
>> ... I do not like the receive sensitivity ...
Hmmm ... I just didn't experience that. Does your '8800 work fine for
local/repeater work?
Clint, K6LCS
------------------------------
Message: 5
Date: Wed, 12 Jan 2011 14:17:01 -0700
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb@xxxxxx.xxx>
Subject: [amsat-bb] Re: Yaesu FT-8800
To: amsat-bb@xxxxx.xxx
Message-ID:
<AANLkTinNpWFeYDzqvH_gP-E7HSrVqwR1c1GuZ8+-UAKj@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=windows-1252
Hi Zack!
> I don?t mean to be the odd guy on the block, but I do not like the 8800 for
> satellite work. ?I enjoy the full duplex function, and it is very easy to
> maneuver through the frequencies/bands using the mic, but I do not like the
> receive sensitivity. ?Every time I have tried to use it for satellite work I
> feel like I fight it the entire time trying to get a strong signal. ?I can?t
> exactly make a very accurate judgment on it either since I have only used it
> a few times.
Don't apologize for posting an opinion. As you mentioned with your
TH-G71As, there can be differences between two of the same model
of radio.
I bought two FT-8800s a year or so ago. One is in Mexico with an Elk
antenna I left down there, and the other one needs to have those knobs
replaced. The 8800 is my backup to that IC-2820H I mentioned in an
earlier post as my full-duplex FM satellite radio. The sensitivity could
be a little better, but I'm happier with it than other radios like my
DJ-G7T. I probably should send it off to Yaesu to get those knobs
replaced, and then try it again on the FM birds.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
> ?If others say it works well, I would have to go with the
> general consensus since I don't use it much. ?The 2 THG71As, and now the
> THD7A and 1 THG71A (yeah, I know the D7 is full duplex, but that is another
> story) are my regular satellite equipment.
>
> 73!
>
> Zack
> KD8KSN
>
> -----Original Message-----
> From: Clint Bradford
> Sent: Wednesday, January 12, 2011 2:19 PM
> To: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] Re: Yaesu FT-8800
>
> Great for sat work - like Patrick mentioned.
>
> For portability, I have installed mine in an ice chest ... photos at ...
>
> ttp://tinyurl.com/cooler-radios
>
> Clint Bradford, K6LCS
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 6
Date: Wed, 12 Jan 2011 16:49:40 -0500
From: Ernie Howard <w8eh.ernie@xxxxx.xxx>
Subject: [amsat-bb] Re: Yaesu FT-8800
To: amsat-bb@xxxxx.xxx
Message-ID: <4D2E21F4.1070803@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I have three of the FT-8800 mobiles. They work great for satellite. It
is my FM radio for sat operation installed here at home. I've tried
other dual band radios, but the FT-8800 is much preferred.
The downside is that I too have noticed that they lack sensitivity
especially on 70cm. Yes, I measured it on a signal generator. They are
more than 5 to 7 db down from other radios that I have. But they do have
better intermod immunity that most radios.
I have used one of my FT-8800 units with a hand held Arrow antenna and
short coax for club and class demos with good success.
Don't expect it to hear the weaker sats well, like SO-50, on the end of
about 75' of coax on steerable beams on the roof. My solution for this
at home was to place a SSB preamp at the antenna on the roof. With that
setup I can hear SO-50 horizon to horizon. Without the preamp I have
drop outs and signals are very weak at the horizon.
Ernie W8EH
On 1/12/2011 3:43 PM, Clint Bradford wrote:
>>> ... I do not like the receive sensitivity ...
> Hmmm ... I just didn't experience that. Does your '8800 work fine for
local/repeater work?
>
> Clint, K6LCS
>
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 7
Date: Wed, 12 Jan 2011 13:02:54 -0900
From: "Edward R. Cole" <kl7uw@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Yaesu FT-8800
To: amsat-bb@xxxxx.xxx
Message-ID: <201101122202.p0CM2sJ6093061@xxxxx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
At 12:17 PM 1/12/2011, Patrick STODDARD (WD9EWK/VA7EWK) wrote:
>Hi Zack!
>
> > I don't mean to be the odd guy on the block, but I do not like the 8800
for
> > satellite work. I enjoy the full duplex function, and it is very easy to
> > maneuver through the frequencies/bands using the mic, but I do not like
the
> > receive sensitivity. Every time I have tried to use it for
> satellite work I
> > feel like I fight it the entire time trying to get a strong
> signal. I can't
> > exactly make a very accurate judgment on it either since I have
> only used it
> > a few times.
>
>Don't apologize for posting an opinion. As you mentioned with your
>TH-G71As, there can be differences between two of the same model
>of radio.
>
>I bought two FT-8800s a year or so ago. One is in Mexico with an Elk
>antenna I left down there, and the other one needs to have those knobs
>replaced. The 8800 is my backup to that IC-2820H I mentioned in an
>earlier post as my full-duplex FM satellite radio. The sensitivity could
>be a little better, but I'm happier with it than other radios like my
>DJ-G7T. I probably should send it off to Yaesu to get those knobs
>replaced, and then try it again on the FM birds.
>
>73!
>
>
>
>
>Patrick WD9EWK/VA7EWK
>http://www.wd9ewk.net/
Just reading the mail. I wonder if anyone uses the TM-700 or TM-710
for satellite? Are they duplex? They are supposedly the mobile mate
to the TH-D7 and new TH-D72. Looking at them for potential future
use on both APRS and Sat as a mobile.
73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 144-1.4kw*, 432-100w*, 1296-testing*, 3400-winter?
DUBUS Magazine USA Rep dubususa@xxxxxxx.xxx
======================================
*temp not in service
------------------------------
Message: 8
Date: Wed, 12 Jan 2011 12:27:45 -0800 (PST)
From: John Neeley <w6zkh@xxx.xxx>
Subject: [amsat-bb] Re: Elk vs Arrow
To: Clint Bradford <clintbrad4d@xxxxxxxxx.xxx>, amsat-bb@xxxxx.xxx
Message-ID: <911828.54380.qm@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
You sure that fellow didnt spell engineer---"injuneer'....afterall, he was
looking for an Arrow... ahemmmmm..
________________________________
From: Clint Bradford <clintbrad4d@xxxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Sent: Wed, January 12, 2011 12:03:25 PM
Subject: [amsat-bb] Elk vs Arrow
>> ... The Arrow does not publish any gain numbers ...
>> ... ELK publishes the normal numbers you would expect ...
Now, after reading previous posts the past day on this, the FIRST thing that
comes t mind is whether or not the writer got his antenna as a freebie as he
demeans other antenna alternatives ... AND I WISH NONE OF US HAD TO THINK LIKE
THIS.
Because a writer here wrote a mini-review of the Elk, and stated it was "very
impressive" as compared to the Arrow. I have to tip my cap to him for his
honesty - he apparently (and hopefully!) won't let "availability of freebies"
sway his opinion of actual performance. But another AMSAT member is
"impressed"
with receiving free equipment - which is being shown to cloud the truth as to
performance between competing equipment.
Some think Arrow's owner is "arrogant" in that he didn't commission a formal
test on the gain of his antennas. On the other hand, those of us that have
used
them know that they work. I had an engineer client purchase one from me back
when I worked for HRO about five years ago. He was standing outside, waiting
for
me to open shop the next morning, carrying his Arrow to return. "This cannot
possibly work," he adamantly exclaimed. "It is engineered all wrong. I want a
refund."
Because i had recommended the product due to me own personal experience with
them, part of me wanted to professionally "challenge" him and learn more about
his overnight experience with the Arrow. But seeing how determined he was
about
it being "engineered all wrong," I changed my thinking to, "Hey, I can
purchase
it myself at a "open item" discount."
And I did. And it is the VERY SAME antenna I use to this day for demos and
presentation.
BUT - back to the last few messages. What should we all learn?
Unfortunately, we
now have to think "behind the scenes" when we read felow AMSAT members'
product
reviews. We're seeing the fact that some vendors give away products has been
able to sway and taint honest reporting.
Clint Bradford, K6LCS
909-241-7666
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 9
Date: Wed, 12 Jan 2011 17:29:02 -0500
From: "Zachary Beougher" <zack.kd8ksn@xxxxxxx.xxx>
Subject: [amsat-bb] TH-D7A Transmit Issues - Or Maybe Arrow
Issues????
To: <amsat-bb@xxxxx.xxx>
Message-ID: <SNT111-DS7AE71F2E2041C5E94FF35B3F10@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Since we are on the subject of satellite equipment, I have a question:
I was on AO51 a bit ago, and I was able to get in okay at the beginning
using the THD7A for transmit, but as the pass went on it was impossible for
me to get in, even when there was dead silence. I tried the D7 afterward
(using the Arrow like I would for a pass) on a couple local repeaters, and I
was having a hard time getting into them, when usually I could hit them with
a duck. I pulled the Arrow off and stuck the duck on, and I can get into
all the repeaters fine. Keeping all of that in mind, I went back to the
Arrow and put a THG71A on in place of the D7 (same battery that was in the
D7), and I could hit the repeater okay. I put the D7 faceplate back on, and
it would not work.
With the above information, I am getting indications of both an issue with
the radio and/or Arrow.
Any ideas as to what the issue might be????
Zack
KD8KSN
------------------------------
Message: 10
Date: Thu, 13 Jan 2011 00:34:20 +0200
From: Ari Kosonen <ari.kosonen@xxxxx.xxx>
Subject: [amsat-bb] Re: Yaesu FT-8800
To: amsat-bb@xxxxx.xxx
Message-ID:
<AANLkTimn6XbjApyheh9qO4pinCirKk=1G3h+3KheYbkj@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
2011/1/12 Ernie Howard <w8eh.ernie@xxxxx.xxx>
> I have three of the FT-8800 mobiles. They work great for satellite.
I have FT-8900 in my car (which is pretty much the same radio, except with
2 additional bands, 28 and 50 MHz).
I am quite happy with the sensitivity of the radio, no problems hearing
AO-51
and having few QSOs with suitable passes with Diamond NR770 mobile whip
in the tailgate of my vehicle. Usually passes rising not higher than ~60
degs
are quite good but the whip is not that good in higher elevations.
What I particularily like (besides the sat-capability) is that normally I am
using
the left side of the radio for monitoring the local repeaters while right
side acts
as an APRS transmitter (with TinyTrak attached).
What I don't like is the wobbly and fragile feeling of knobs of the radio.
The first FT-8900 I bought was DOA right out of the box, but after it got
replaced with another one, the current unit has served few years flawlessly.
73 de Ari OH3KAV
Tampere, Finland (grid: KP11)
------------------------------
Message: 11
Date: Wed, 12 Jan 2011 17:42:32 -0500
From: "Zachary Beougher" <zack.kd8ksn@xxxxxxx.xxx>
Subject: [amsat-bb] Re: TH-D7A Transmit Issues - Or Maybe Arrow
Issues????
To: <amsat-bb@xxxxx.xxx>
Message-ID: <SNT111-DS16BCE011E522A6C3726A75B3F10@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
I did an additional test since my last email....... I tried two different
radios (D7 and G71) using the same battery and I CANNOT get into the local
repeater now. I came inside the house, put the duck on, and I can hit the
repeater fine.
This would narrow it down to an issue with the Arrow. Does anyone have any
ideas what might cause these symptoms? I have not changed anything with it.
Zack
KD8KSN
From: Zachary Beougher
Sent: Wednesday, January 12, 2011 5:29 PM
To: amsat-bb@xxxxx.xxx
Subject: TH-D7A Transmit Issues - Or Maybe Arrow Issues????
Since we are on the subject of satellite equipment, I have a question:
I was on AO51 a bit ago, and I was able to get in okay at the beginning
using the THD7A for transmit, but as the pass went on it was impossible for
me to get in, even when there was dead silence. I tried the D7 afterward
(using the Arrow like I would for a pass) on a couple local repeaters, and I
was having a hard time getting into them, when usually I could hit them with
a duck. I pulled the Arrow off and stuck the duck on, and I can get into
all the repeaters fine. Keeping all of that in mind, I went back to the
Arrow and put a THG71A on in place of the D7 (same battery that was in the
D7), and I could hit the repeater okay. I put the D7 faceplate back on, and
it would not work.
With the above information, I am getting indications of both an issue with
the radio and/or Arrow.
Any ideas as to what the issue might be????
Zack
KD8KSN
------------------------------
Message: 12
Date: Wed, 12 Jan 2011 14:44:17 -0800
From: Clint Bradford <clintbradford@xxx.xxx>
Subject: [amsat-bb] Re: Zack's Setup
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Message-ID: <90B52F9A-E362-45BD-95CD-2014AACC76B2@xxx.xxx>
Content-Type: text/plain; CHARSET=US-ASCII
>> ... having a hard time with the Arrow ... stuck the duck on, and I can
get into all the repeaters fine ...
Check out Arrow ops on both 2M and 440 - and see if there might be a short
or problem with either of the gamma matching elements.
Are there any connectors or jumpers between the Arrow's leads and your
equipment? If so, check their integrity.
It just sounds like it's going to be a simple fix, Zack!
Clint, K6LCS
909-241-7666
------------------------------
Message: 13
Date: Wed, 12 Jan 2011 15:46:59 -0800
From: Clint Bradford <clintbradford@xxx.xxx>
Subject: [amsat-bb] Re: Zack's Setup
To: John Neeley <w6zkh@xxx.xxx>
Cc: AMSAT BB <amsat-bb@xxxxx.xxx>
Message-ID: <6FD7BAB8-A30E-4381-8930-62A30D51583A@xxx.xxx>
Content-Type: text/plain; CHARSET=US-ASCII
>> ... Arrow diplexer ...
Didn't think of that! Hasn't been a recent major issue for Arrow ... but
definitely a possibility!
Clint, K6LCS
------------------------------
Message: 14
Date: Wed, 12 Jan 2011 18:55:45 -0500
From: "Zachary Beougher" <zack.kd8ksn@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Zack's Setup
To: "AMSAT BB" <amsat-bb@xxxxx.xxx>
Message-ID: <SNT111-DS1939904F7796C0560EF5A9B3F10@xxx.xxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Thanks for the tips guys! I should have thought about it beforehand, but
the issue was the 2m coax. Never though to check it.
Thanks for putting me back on the air! ;-)
73!
Zack
KD8KSN
-----Original Message-----
From: Clint Bradford
Sent: Wednesday, January 12, 2011 5:44 PM
To: AMSAT BB
Subject: [amsat-bb] Re: Zack's Setup
>> ... having a hard time with the Arrow ... stuck the duck on, and I can
>> get into all the repeaters fine ...
Check out Arrow ops on both 2M and 440 - and see if there might be a short
or problem with either of the gamma matching elements.
Are there any connectors or jumpers between the Arrow's leads and your
equipment? If so, check their integrity.
It just sounds like it's going to be a simple fix, Zack!
Clint, K6LCS
909-241-7666
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 15
Date: Wed, 12 Jan 2011 15:34:19 -0900
From: "Edward R. Cole" <kl7uw@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: TH-D7A Transmit Issues - Or Maybe Arrow
Issues????
To: "Zachary Beougher" <zack.kd8ksn@xxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <201101130034.p0D0YJax013519@xxxxxx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
Zack,
Do you have any way to measure RF output power from the radio? A
power meter (or SWR meter) that indicates forward power. If you do,
measure power with Arrow connected to output of the meter. Measure
reflected power (or SWR). If you have a dummy load connect it to the
meter and test the radio with that and compare that with what you see
with the antenna connected.
A duck is not a good 50-ohm load and depends on the field of the
radio case to provide a good match. So connecting a duck to a power
or SWR meter will not give an accurate indication. If the arrow is
pointed at the repeater in the proper polarity it should indicate at
least couple s-units higher received signal than a duck because the
Arrow has gain and a duck actually has loss.
Another thing that might "get" you with your simple comparison is the
battery. Can you measure the voltage? Even though radios and
antennas "seem" to be different a soft battery can drive you nuts
with varying results. If you have fresh charged spare battery try it
with your comparison tests.
73, Ed
At 01:42 PM 1/12/2011, Zachary Beougher wrote:
>I did an additional test since my last email....... I tried two
>different radios (D7 and G71) using the same battery and I CANNOT
>get into the local repeater now. I came inside the house, put the
>duck on, and I can hit the repeater fine.
>
>This would narrow it down to an issue with the Arrow. Does anyone
>have any ideas what might cause these symptoms? I have not changed
>anything with it.
>
>Zack
>KD8KSN
>
>From: Zachary Beougher
>Sent: Wednesday, January 12, 2011 5:29 PM
>To: amsat-bb@xxxxx.xxx
>Subject: TH-D7A Transmit Issues - Or Maybe Arrow Issues????
>
>Since we are on the subject of satellite equipment, I have a question:
>
>I was on AO51 a bit ago, and I was able to get in okay at the
>beginning using the THD7A for transmit, but as the pass went on it
>was impossible for me to get in, even when there was dead
>silence. I tried the D7 afterward (using the Arrow like I would for
>a pass) on a couple local repeaters, and I was having a hard time
>getting into them, when usually I could hit them with a duck. I
>pulled the Arrow off and stuck the duck on, and I can get into all
>the repeaters fine. Keeping all of that in mind, I went back to the
>Arrow and put a THG71A on in place of the D7 (same battery that was
>in the D7), and I could hit the repeater okay. I put the D7
>faceplate back on, and it would not work.
>
>With the above information, I am getting indications of both an
>issue with the radio and/or Arrow.
>
>Any ideas as to what the issue might be????
>
>Zack
>KD8KSN
>_______________________________________________
>Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>Not an AMSAT-NA member? Join now to support the amateur satellite program!
>Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 144-1.4kw*, 432-100w*, 1296-testing*, 3400-winter?
DUBUS Magazine USA Rep dubususa@xxxxxxx.xxx
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------------------------------
Message: 16
Date: Wed, 12 Jan 2011 17:45:08 -0700
From: "Rick Tejera" <saguaroastro@xxx.xxx>
Subject: [amsat-bb] Re: TH-D7A Transmit Issues - Or Maybe Arrow
Issues????
To: "'Zachary Beougher'" <zack.kd8ksn@xxxxxxx.xxx>,
<amsat-bb@xxxxx.xxx>
Message-ID:
<20110113004653.WYOK4818.fed1rmmtao101.cox.net@xxxxxxxxxxxx.xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Zack,
I use my TH-D7A with a home brew Dual band yagi (Kent Brittan's Plans). I
note that once I dial in the proper polarization on the antenna I can work
most of the pass with only slight adjustments. As the pass nears it's end
(these are South to North passes) I notice I have to readjust the
polarization of the antenna quite radically.
One thing with the arrow is that the two bands are at 90 degrees to each
other, I've always wondered how that affects things. If you're dialed in on
70cm, you're going to be off on 2m and vice versa. My homebrew antenna has
both bands on the same plane.
Clear Skies
Rick Tejera
Editor SACnews,
Public Outreach Coordinator
Saguaro Astronomy Club
Phoenix, Arizona
www.saguaroastro.org
saguaroastro@xxx.xxx
K7TEJ, AMSAT 38452
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Zachary Beougher
Sent: Wednesday, January 12, 2011 15:29
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] TH-D7A Transmit Issues - Or Maybe Arrow Issues????
Since we are on the subject of satellite equipment, I have a question:
I was on AO51 a bit ago, and I was able to get in okay at the beginning
using the THD7A for transmit, but as the pass went on it was impossible for
me to get in, even when there was dead silence. I tried the D7 afterward
(using the Arrow like I would for a pass) on a couple local repeaters, and I
was having a hard time getting into them, when usually I could hit them with
a duck. I pulled the Arrow off and stuck the duck on, and I can get into
all the repeaters fine. Keeping all of that in mind, I went back to the
Arrow and put a THG71A on in place of the D7 (same battery that was in the
D7), and I could hit the repeater okay. I put the D7 faceplate back on, and
it would not work.
With the above information, I am getting indications of both an issue with
the radio and/or Arrow.
Any ideas as to what the issue might be????
Zack
KD8KSN
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 6, Issue 22
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