| |
CX2SA > SATDIG 12.08.12 20:03l 238 Lines 8128 Bytes #999 (0) @ WW
BID : AMSATBB7256
Read: GUEST
Subj: AMSAT-BB-digest V7 256
Path: IZ3LSV<IR1UAW<IK1NHL<CX2SA
Sent: 120812/1901Z @:CX2SA.SAL.URY.SA #:64987 [Salto] FBB7.00e $:AMSATBB7256
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Icom AG-35 Preamp Question (Mike Seguin N1JEZ)
2. Re: How the Amateur Radio OSSI-1 Satellite Works (Trevor .)
3. Re: How the Amateur Radio OSSI-1 Satellite Works (Vu Trong Thu)
----------------------------------------------------------------------
Message: 1
Date: Sun, 12 Aug 2012 09:05:22 -0400
From: "Mike Seguin N1JEZ" <n1jez@xxxxxxxxxxxxxxxxx.xxx>
To: "Mike Seguin N1JEZ" <n1jez@xxxxxxxxxxxxxxxxx.xxx>,
<kc6uqh@xxx.xxx>, "'Lawn, Richard'" <RLawn@xxxxx.xxx>,
<amsat-bb@xxxxx.xxx>, "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] Re: Icom AG-35 Preamp Question
Message-ID: <2667C4AB30654B57BD8C9E66A676075A@xxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=response
Sorry guys, thought you were talking AG1200, not AG35....
73,
Mike, N1JEZ
AMSAT 29649
"A closed mouth gathers no feet"
----- Original Message -----
From: "Mike Seguin N1JEZ" <n1jez@xxxxxxxxxxxxxxxxx.xxx>
To: <kc6uqh@xxx.xxx>; "'Lawn, Richard'" <RLawn@xxxxx.xxx>;
<amsat-bb@xxxxx.xxx>; "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Sent: Sunday, August 12, 2012 8:57 AM
Subject: [amsat-bb] Re: Icom AG-35 Preamp Question
> Hi Mark,
>
> That is the way they're supposed to work. +12v receive - 0v on xmit.
>
> It is fine with a Yaesu FT-736R using the built in preamp feed system -
> power up the coax. Just have to watch out for any DC block.
>
> It also would work with a Yeasu FT-847 if it had 1296.....
>
> I had one for a while. I found I had to open it up and retune as it was
> set for the low end of the 23cm band?!? My biggest problem was that it was
> only good for about 15 watts. I had to use it after my DL2AM 80 watt
> amp....
>
> Mike
>
>
> ----- Original Message -----
> From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
> Subject: [amsat-bb] Re: Icom AG-35 Preamp Question
>
>
>> Hi All,
>>
>> Somebody please clarify---I may be wrong, but I thought the Icom preamps
>> did the following with Icom radios:
>>
>> In receive, 12V is powered up the coax. Device is powered, preamp is ON.
>> In transmit, the 12 power feed is stopped. Device is not powered, and
>> it's bypassed during xmit.
>>
>> If this is the case, it complicates greatly the use of Icom preamps on
>> non-Icom radios (means there isn't a typical RF-sensed bypass circuit,
>> which means it would be easy to blow in a non-Icom radio).
>>
>> Am I remembering this wrong?
>>
>> Mark N8MH
>>
>> At 09:30 PM 8/11/2012 -0700, Art McBride wrote:
>>>Rick,
>>>I suggest you use a VOM or DMM to measure the current drawn on 12 volts
>>>going to the power injector. If everything is connected correctly It will
>>>draw 30-200 mA. Confirm that you have continuity in your coax. Some
>>>lightning arrestors have a DC block built in. It is best to test it with
>>>a
>>>short run of coax between the preamp and the power injector at the radio
>>>while listening to a local repeater to see if the signal increases when
>>>you
>>>apply power to it. If it operates then you can proceed to determine if
>>>there
>>>are problems with the coax to the antenna, not carrying the 12 VDC.
>>>73
>>>Art,
>>>KC6UQH
>>>
>>>-----Original Message-----
>>>From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
>>>Behalf Of Lawn, Richard
>>>Sent: Saturday, August 11, 2012 3:30 PM
>>>To: amsat-bb@xxxxx.xxx
>>>Subject: [amsat-bb] Icom AG-35 Preamp Question
>>>
>>>I bought an Icom AG-35 preamp about a year ago. The fellow ham advertised
>>>it
>>>as virtually brand new and it was/is. I planned to use it this summer
>>>with a
>>>TS-2000 which doesn't supply 12v voltage to the coax to power a preamp as
>>>other xcvrs do. I used a Mirage KP2 unit to inject power to the coax to
>>>drive mast mounted the preamp. When I turn the power on there seems to be
>>>little or no noticeable difference in background noise and worse than
>>>that I
>>>cannot here any signals on FO-29 downlink, and I know the bird has been
>>>active. Any suggestions? Is the preamp fried? I can't even get the
>>>weather
>>>proof case off to trouble shoot, not that I'd know what to look for. Any
>>>suggestions on repair?
>>>
>>>TNX
>>>73
>>>Rick
>>>W2JAZ
>>>
>>>
>>>_______________________________________________
>>>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
>>
>> _______________________________________________
>> 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: 2
Date: Sun, 12 Aug 2012 17:38:51 +0100 (BST)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: g0mrf@xxx.xxxx amsat-bb@xxxxx.xxxx Vu Trong Thu <thuvt@xxx.xxx.xx>
Subject: [amsat-bb] Re: How the Amateur Radio OSSI-1 Satellite Works
Message-ID:
<1344789531.83328.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
--- On Sun, 12/8/12, Vu Trong Thu <thuvt@xxx.xxx.xx> wrote:
> With only 4 LEDs, I wonder how OSSI-1 compares to FITSAT-1 (NIKAWA)
Hi Thu,
I understand that due to the high power consumption of the FITSAT-1 LED's
they will only be activated when FITSAT-1 is within range of the command
station in Japan. I guess Vi?t Nam may also be in range at the same time.
I am hoping that the lower power consumption of the fewer LED's on OSSI-1
will mean that it may be available to be seen in other parts of the world as
well.
73 Trevor M5AKA
> OSSI-1 General Overview http://www.uk.amsat.org/?p=9600
------------------------------
Message: 3
Date: Mon, 13 Aug 2012 01:29:38 +0700
From: "Vu Trong Thu" <thuvt@xxx.xxx.xx>
To: "'Trevor .'" <m5aka@xxxxx.xx.xx>, <g0mrf@xxx.xxx>,
<amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: How the Amateur Radio OSSI-1 Satellite Works
Message-ID: <004a01cd78b8$7b3b6ca0$71b245e0$@xxx.xxx.xx>
Content-Type: text/plain; charset="UTF-8"
Hi Trevor,
Thank you, it makes sense to me. However, with only 4 LEDs if OSSI-1 can be
visible to the naked eye, or even to a digital camera with long exposure
setting, that'll be incredible!
I'll bring out my telescope and camera ready for both satellites :)
73,
Thu
-----Original Message-----
From: Trevor . [mailto:m5aka@xxxxx.xx.xxx
Sent: Sunday, August 12, 2012 11:39 PM
To: g0mrf@xxx.xxxx amsat-bb@xxxxx.xxxx Vu Trong Thu
Subject: RE: [amsat-bb] Re: How the Amateur Radio OSSI-1 Satellite Works
--- On Sun, 12/8/12, Vu Trong Thu <thuvt@xxx.xxx.xx> wrote:
> With only 4 LEDs, I wonder how OSSI-1 compares to FITSAT-1 (NIKAWA)
Hi Thu,
I understand that due to the high power consumption of the FITSAT-1 LED's
they will only be activated when FITSAT-1 is within range of the command
station in Japan. I guess Vi?t Nam may also be in range at the same time.
I am hoping that the lower power consumption of the fewer LED's on OSSI-1
will mean that it may be available to be seen in other parts of the world as
well.
73 Trevor M5AKA
> OSSI-1 General Overview http://www.uk.amsat.org/?p=9600
------------------------------
_______________________________________________
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 7, Issue 256
****************************************
Read previous mail | Read next mail
| |
