| |
CX2SA > SATDIG 27.02.12 22:10l 311 Lines 10559 Bytes #999 (0) @ WW
BID : AMSATBB765
Read: GUEST
Subj: AMSAT-BB-digest V7 65
Path: IZ3LSV<I0OJJ<VE3UIL<LZ3NP<CX2SA
Sent: 120227/2003Z @:CX2SA.SAL.URY.SA #:52412 [Salto] FBB7.00e $:AMSATBB765
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: th-d72 using external speaker?
(Patrick STODDARD (WD9EWK/VA7EWK))
2. Memorial to Dick Daniels, W4PUJ (Robert McGwier)
3. AMSAT-BB from K9TSU (Vince Waelti)
4. GAAS FET Preamp Component Question (Eugene Crist)
5. Re: GAAS FET Preamp Component Question (i8cvs)
6. Re: Motor for Yaesu G5500 Azimuth Rotator? (Phil Karn)
7. Looking for a copy of the 2011 San Jose Proceedings
(Alan P. Biddle)
8. Re: GAAS FET Preamp Component Question (Simone)
----------------------------------------------------------------------
Message: 1
Date: Sun, 26 Feb 2012 14:11:51 -0700
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb@xxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: th-d72 using external speaker?
Message-ID:
<CAN6TEUe0P7_xp08stmG8vH7RLLqAN+hKSKUL8Xuam-1UY4nJBA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi Scott!
> hi folks, starting to get the hang of this new radio. Is there a way to use
> an external (power) speaker?. i have the smc-34 speaker mic that came
> with the unit and cannot just plug the mic jack in my itself is there some
> kind of adaptor ?like a pigtail to seperate the mic and speaker jacks?
I'm not aware of any pigtail/splitter to do what you describe, but you
could plug the speaker into the small jack on the bottom of the mic.
It's the same small (3/32" or 2.5mm) jack as on the radio, so you may
need an adapter to plug in many speakers and headphones/earbuds
with the more common 1/8" or 3.5mm plugs.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
Message: 2
Date: Sun, 26 Feb 2012 19:22:59 -0500
From: Robert McGwier <rwmcgwier@xxxxx.xxx>
To: amsat bb <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Memorial to Dick Daniels, W4PUJ
Message-ID:
<CA+K5gzdN+PiB1bpen+piycS=A_oqj44k1bU0VwBiCEWQ9U51Jw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Yesterday at Little Falls Church in Arlington, VA Family, friends, and
colleagues had a memorial for Dick Daniels W4PUJ (SK) who died recently
after a very brief fight against lung cancer. Barry, WD4ASW, President of
AMSAT read a tribute written by Jan King W3GEY/VK4GEY.
http://youtu.be/pGhn1eC52Wo
I apologize for the audio transients at the beginning, typical problems
from hand holding a smart phone. But the auto stabilization from YouTube is
simply awesome.
Bob
--
Bob McGwier
Facebook: N4HYBob
ARS: N4HY
------------------------------
Message: 3
Date: Sun, 26 Feb 2012 19:06:39 -0600
From: Vince Waelti <k9tsu@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] AMSAT-BB from K9TSU
Message-ID: <SNT135-W1588011260E6ED22996CC9EF690@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Hello fellow ham-ers, I am proud to say that I will start a Saturday Night
Sat-Chat on the *AMSAT* Echolink server. This will be Saturday Nights,
every Saturday Night, from 7PM central time to 8:30pm central time. That's
0100 Sunday (UTC) to 0230 Sunday (UTC). I will be 'net manager,' but this is
an open net. Every satellite operator is welcome to jump in. This will
basically be a large round-table, and after every rotation people are
welcome to jump in. I will not be "net control." There won't be a "net
control." Just a place/time for an open net of satellite operators or hams
wanting to be satellite operators to ask questions or talk about that rare
satellite DX. Feel free to connect your -L or -R nodes, or just yourself.
Please keep the participants to hams that are interested in becoming
satellite ops or are already satellite ops, or ones that are curious what
this is about. Thanks, K9TSU, Vince, en52, Wisconsin.
Vince R. Waelti, K9TSU
Green County ARES/RACES
Winnebago County ARES/SKYWARN
www.k9tsu.tk
608.312.0138
------------------------------
Message: 4
Date: Sun, 26 Feb 2012 19:41:37 -0700
From: Eugene Crist <ejcristjr@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] GAAS FET Preamp Component Question
Message-ID:
<CAOEfJ4hW_m6Susg=B5XC4f6ScPWotbF-DD7ceQTEpCm4p43HOA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I'm planning to build the GAAS FET Preamp for 430 MHZ that's in the 2008
ARRL Handbook on page 14.37. One of the components on the drain of Q1 looks
like a ferrite bead. I've never used these in construction before and the
parts list doesn't specify any particular value or rating. Does anyone know
what value/rating should be used? Any info would be greatly appreciated.
Thanks, Gene (KB3ONA)
------------------------------
Message: 5
Date: Mon, 27 Feb 2012 12:25:43 +0100
From: "i8cvs" <domenico.i8cvs@xxx.xx>
To: "Eugene Crist" <ejcristjr@xxxxx.xxx>, "Amsat - BBs"
<amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: GAAS FET Preamp Component Question
Message-ID: <001101ccf542$8b21da40$0401a8c0@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Gene, KB3ONA
As described into your Handbook at page 10.30 Chapter 10, the ferrite
bead is slipped over the drain lid of a GaAsFET to prevent a possible
autooscillation of your MGF-1402 and in your case a ferrite bead of
Fair-Rite no.43 material is expecially suitable for this purpose.
BTW any ferrite bead of 3 mm in diameter is suitable provided that the
ohmic resistance of material as measured with an ohmmeter across the
ends of the single hole is around 30 K
Take care when handling a GaAsFET as it is very sensitive to static
charges on your hands so that all working tools and as well your body
must be grounded in order do not destroy the device.
In addition if your solder iron is not a low voltage 12 volt AC statically
insulated from the AC line for solder GaAsFET's and active devices
it is recommended to solder the GaAsFET at the end of the job using the
solder iron sufficiently hoth but disconnected from the AC line supply.
Have fun.
73" de
i8CVS Domenico
----- Original Message -----
From: "Eugene Crist" <ejcristjr@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Monday, February 27, 2012 3:41 AM
Subject: [amsat-bb] GAAS FET Preamp Component Question
> I'm planning to build the GAAS FET Preamp for 430 MHZ that's in the 2008
> ARRL Handbook on page 14.37. One of the components on the drain of Q1
> looks like a ferrite bead. I've never used these in construction before
and the
> parts list doesn't specify any particular value or rating.
> Does anyone know what value/rating should be used? Any info would be
> greatly appreciated.
>
> Thanks, Gene (KB3ONA)
> _______________________________________________
> 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: Mon, 27 Feb 2012 03:39:14 -0800
From: Phil Karn <karn@xxxx.xxx>
To: i8cvs <domenico.i8cvs@xxx.xx>
Cc: Amsat - BBs <amsat-bb@xxxxx.xxx>, karn@xxxx.xxx
Subject: [amsat-bb] Re: Motor for Yaesu G5500 Azimuth Rotator?
Message-ID: <4F4B6B62.2030107@xxxx.xxx>
Content-Type: text/plain; charset=UTF-8
On 2/26/12 3:02 AM, i8cvs wrote:
>
> If you are interested in a very simple but effective "Single to 3-PHASE
> Power Converter for azimuth and elevation motors currently used for
> EME, look at this web page made by John Yurek, K3PGP
>
> http://www.k3pgp.org/3phconv.htm
This is a classic "rotary phase converter" that uses a surplus 3-phase
'idler' motor to generate something resembling 3-phase AC from a single
phase utility supply. The idler motor itself needs a starting mechanism;
this one seems to do it with running capacitors but I've also seen it
done with a separate single-phase starting motor.
These things are commonly homebrewed to run 3-phase machine shop tools
when a 3-phase utility feed isn't available. They usually work well
enough, but the output is not ideal 3-phase AC.
It's also fixed frequency. A variable frequency supply is what you
really want when driving antennas.
------------------------------
Message: 7
Date: Mon, 27 Feb 2012 09:29:21 -0600
From: "Alan P. Biddle" <APBIDDLE@xxxxxx.xxx>
To: "AMSAT-BB" <amsat-bb@xxxxx.xxx>, "SAREX-BB" <SAREX@xxxxx.xxx>
Subject: [amsat-bb] Looking for a copy of the 2011 San Jose
Proceedings
Message-ID: <8E7CDA8294D94C9B9B2B6A0058E58423@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
Hi,
I am looking for a hard copy, gently used, of the Proceedings. If you have
one gathering dust which you would be willing to part with, drop me a note
off list.
73s,
Alan
WA4SCA
------------------------------
Message: 8
Date: Mon, 27 Feb 2012 09:12:53 +0100
From: Simone <terrando@xxxxxxx.xx>
To: Eugene Crist <ejcristjr@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: GAAS FET Preamp Component Question
Message-ID:
<CAKQMVSec8i9BbB6uN+z+Dz+Q+7in-9jxc0wdfBwTNzs8cAOERQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi Gene,
I don't have read the scematic yet (I will do later in the morning), but I
suppose your schematic is a common source LNA.
If it's so, the ferrite on the drain it's a choke, used as a bias tee to
isolate the RF portion of the circuit (the GaAs FET) from the power supply.
For this purpose, you can use any ferrite bead that has an equivament
impedance in the range of the kOhms in the band of interest. As an
alternative, you can use a big inductance, that should do the trick.
Cheers
Simone - IW1FYV
Il giorno 27 febbraio 2012 03:41, Eugene Crist <ejcristjr@xxxxx.xxx> ha
scritto:
> I'm planning to build the GAAS FET Preamp for 430 MHZ that's in the 2008
> ARRL Handbook on page 14.37. One of the components on the drain of Q1 looks
> like a ferrite bead. I've never used these in construction before and the
> parts list doesn't specify any particular value or rating. Does anyone know
> what value/rating should be used? Any info would be greatly appreciated.
>
> Thanks, Gene (KB3ONA)
> _______________________________________________
> 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 7, Issue 65
***************************************
Read previous mail | Read next mail
| |
