OpenBCM V1.08-5-g2f4a (Linux)

Packet Radio Mailbox

IZ3LSV

[San Dona' di P. JN]

 Login: GUEST





  
CX2SA  > SATDIG   09.03.11 20:51l 693 Lines 21880 Bytes #999 (0) @ WW
BID : AMSATBB6147
Read: GUEST
Subj: AMSAT-BB-digest V6 147
Path: IZ3LSV<F6CDD<JE7YGF<XE1FH<VE2PKT<VE1DRG<CX2SA
Sent: 110309/1844Z @:CX2SA.LAV.URY.SA #:57526 [Minas] FBB7.00e $:AMSATBB6147
From: CX2SA@CX2SA.LAV.URY.SA
To  : SATDIG@WW

Today's Topics:

   1.  Voyager 1 Still Gathering Data (B J)
   2. Re: Fwd: Allocation of 433 ? 434 MHz Band for  Short  Range
      Devices in VR2 (Trevor .)
   3. Re: Fwd: Allocation of 433 ? 434 	MHz Band for  Short  Range
      Devices in VR2 (Tony Langdon)
   4. Re: Fwd: Allocation of 433 ? 434 MHz Band for  Short  Range
      Devices in VR2 (Miguel A. Vallejo, EA4EOZ)
   5. Re: RARE Photo of AMSAT ACs (Steve Meuse)
   6. Re: Fwd: Allocation of 433 ? 434 MHz Band for  Short  Range
      Devices in VR2 (Trevor .)
   7. Re: RARE Photo of AMSAT ACs (Clint Bradford)
   8. Re: RARE Photo of AMSAT ACs (Ng, Peter)
   9.  Elmer (Pete Rowe)
  10.  Daylight Savings Time in US (Clint Bradford)
  11. Re: [PNWVHFS] Fwd: Allocation of 433 �	434 MHz Band
      for Short R	ange Devices in VR2 (WB6FFC)
  12.  Another Terrific View Of ISS From Space Shuttle (B J)
  13. Re: Daylight Savings Time in US (Dee)
  14.  presentation Thursday, hamfest Saturday
      (Patrick STODDARD (WD9EWK/VA7EWK))
  15.  AO-51 reports indicate transmitter(s) are OFF (Mark L. Hammond)
  16.  Welcome Back, Discovery! (B J)
  17.  IC-821H Frontend Overload? (Paul Delaney - K6HR)
  18. Re: IC-821H Frontend Overload? (Mark L. Hammond)


----------------------------------------------------------------------

Message: 1
Date: Tue, 8 Mar 2011 12:05:46 -0800 (PST)
From: B J <top_gun_canada@xxxxx.xxx>
Subject: [amsat-bb]  Voyager 1 Still Gathering Data
To: amsat-bb@xxxxx.xxx
Message-ID: <958540.11903.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii

http://www.jpl.nasa.gov/news/news.cfm?release=2011-069&cid=release_2011-069&ms
ource=11069&tr=y&auid=7897889

73s

Bernhard VA6BMJ @ DO33FL





------------------------------

Message: 2
Date: Tue, 8 Mar 2011 20:07:45 +0000 (GMT)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
Subject: Re: [amsat-bb] Fwd: Allocation of 433 ? 434 MHz Band for
Short  Range Devices in VR2
To: amsat-bb@xxxxx.xxxx "Edward R. Cole" <kl7uw@xxxxxxxxx.xxx>
Cc: Johnny Siu <vr2xmc@xxxxx.xxx.xx>
Message-ID: <291191.61976.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8

Short Range Devices (SRDs) in 433-434 are bad news.

The United Kingdom opened up 433/434 to SRDs in the 1990's. Automobile
remote control key fobs used it - very short range, very low power stuff but
the killer was the receivers.

The Key Fob receivers had wide-open front-ends and collapsed in the presence
of nearby RF. The result was that some UK Amateur 70cm repeaters were forced
to shutdown to protect the unlicensed SRD's. The UK regulator Ofcom made it
mandatory that applications for UK 70cm (430-440MHz) repeater licenses had
to prove that they wouldn't cause "interference" to these unlicensed
devices, eg wouldn't block wide-open RF front-ends!

Following on from Automobile key fobs came a host of other low power SRD
applications that were keen to use 433/434MHz. These have caused
interference over a wide area, see

Thames estuary SRD Interference on 433.500MHz
http://www.g4uvj.btinternet.co.uk/isleofgrain.html

SRD in 433/434MHz also impacts the Amateur Satellite Service. Manufacturers
of 10 milliwatt walkie-talkies for 433/434 have cleverly run some leads
through the battery compartment. If the user cuts these leads their 10mw
433/434MHz walkie talkie or base station gets converted into a 4 watt output
transceiver that operates from 433.075 right up to 435.525MHz - well into
our satellite allocation, see

http://www.southgatearc.org/news/august2009/intek_drs5070_pmr446_radio.htm

YouTube - Intek MT 5050 Export
http://www.youtube.com/watch?v=Sgk5NDRP5sQ

Industry needs a Globally allocated license exempt UHF allocation between
400 and 2400MHz - there isn't one !! - Global UHF license exempt spectrum is
fragmented - Industry is currently trying to get 433-435MHz allocated as
Global Unlicensed Spectrum so equipment can be sold anywhere.

Belatedly Europe is attempting to allocate 915-921MHz (in-between European
cell-phone frequencies) to SRD's.

If 915-921MHz doesn't become the Global UHF SRD band then Amateurs will lose
433-435MHz for ever.

Other URL's that may be of interest:

Australia - SRD Interference causes Repeater to move
http://www.southgatearc.org/news/jun2005/repeater_move.htm

New Zealand 3.6 and 433 MHz SRDs
http://www.southgatearc.org/news/august2010/nz_revised_gurl.htm

Short range devices in the 433 MHz band
http://www.southgatearc.org/news/august2008/short_range_devices_in_433mhz_band
.htm

73 Trevor M5AKA








------------------------------

Message: 3
Date: Wed, 09 Mar 2011 07:57:23 +1100
From: Tony Langdon <vk3jed@xxxxx.xxx>
Subject: Re: [amsat-bb] Fwd: Allocation of 433 ? 434 	MHz Band for
Short  Range Devices in VR2
To: "Trevor ." <m5aka@xxxxx.xx.xx>, amsat-bb@xxxxx.xxxxxxxxxxxx R.
Cole" <kl7uw@xxxxxxxxx.xxx>
Cc: Johnny Siu <vr2xmc@xxxxx.xxx.xx>
Message-ID: <4d76983b.500edf0a.63b6.3d7b@xx.xxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed

At 07:07 AM 3/9/2011, Trevor . wrote:
>Short Range Devices (SRDs) in 433-434 are bad news.

Tell me about it! :/


>The United Kingdom opened up 433/434 to SRDs in the 1990's.
>Automobile remote control key fobs used it - very short range, very
>low power stuff but the killer was the receivers.

Australia also allowed SRDs in the mid-late 1990s.


>The Key Fob receivers had wide-open front-ends and collapsed in the
>presence of nearby RF. The result was that some UK Amateur 70cm
>repeaters were forced to shutdown to protect the unlicensed SRD's.
>The UK regulator Ofcom made it mandatory that applications for UK
>70cm (430-440MHz) repeater licenses had to prove that they wouldn't
>cause "interference" to these unlicensed devices, eg wouldn't block
>wide-open RF front-ends!

This problem has been noted in certain locations, but they are not
offered protection from this sort of interference here.

>SRD in 433/434MHz also impacts the Amateur Satellite Service.
>Manufacturers of 10 milliwatt walkie-talkies for 433/434 have
>cleverly run some leads through the battery compartment. If the user
>cuts these leads their 10mw 433/434MHz walkie talkie or base station
>gets converted into a 4 watt output transceiver that operates from
>433.075 right up to 435.525MHz - well into our satellite allocation, see

Ouch!  Haven't seen those here.

>Australia - SRD Interference causes Repeater to move
>http://www.southgatearc.org/news/jun2005/repeater_move.htm

There's many examples of repeaters having to move.  The problem for
us here was that there was no limit put on the duty cycle of the
SRDs.  The most troublesome devices down here have been industrial
crane controllers, which have a 100% duty cycle.  I for one had
interference from these from an industrial area 1-2km from my
repeater.  The ACMA effectively legislated that these devices don't
exist, when it comes to protection from interference.  The walkie
talkies disappeared off the market quickly here.  I think the well
established UHF CB service out competed them, offering more power
(200 mW - 5W) legally, and more features for a similar price, as well
as compatibility with a larger installed base.

The other big problem here is cordless headphones, which tend to
drift up and down the band, and even outside the SRD band.

73 de VK3JED / VK3IRL
http://vkradio.com



------------------------------

Message: 4
Date: Tue, 08 Mar 2011 22:42:50 +0100
From: "Miguel A. Vallejo, EA4EOZ" <ea4eoz@xxxxx.xx>
Subject: Re: [amsat-bb] Fwd: Allocation of 433 ? 434 MHz Band for
Short  Range Devices in VR2
To: amsat-bb@xxxxx.xxx
Message-ID: <4D76A2DA.5080607@xxxxx.xx>
Content-Type: text/plain; charset=windows-1252; format=flowed

Trevor wrote:

> The UK regulator Ofcom made it mandatory that applications for UK
> 70cm (430-440MHz) repeater licenses had to prove that they wouldn't
> cause "interference" to these unlicensed devices, eg wouldn't block
> wide-open RF front-ends!

Unlicensed devices imposing restrictions to licensed users? I hope you
are joking, otherwise you have a serious problem with Ofcom and your
national society (RSGB?).

73!


------------------------------

Message: 5
Date: Tue, 8 Mar 2011 17:03:42 -0500
From: Steve Meuse <smeuse@xxxx.xxx>
Subject: [amsat-bb] Re: RARE Photo of AMSAT ACs
To: Clint Bradford <clintbradford@xxx.xxx>
Cc: AMSAT BB <amsat-bb@xxxxx.xxx>
Message-ID: <20110308220342.GA28213@xxxx.xxx>
Content-Type: text/plain; charset=us-ascii

Clint Bradford expunged (clintbradford@xxx.xxxxx

> Some of my fellow AMSAT friends may not have seen this group photo of
AMSAT area coordinators ... I use it in my presentations ...
>
> http://tinyurl.com/SKEDS

What's that funny thing you're holding? ;)

Is that an abacus or something?

<tongue firmly implanted in cheek>

-Steve

N1JFU -  http://n1jfu.blogspot.com - smeuse@xxxxxxx



------------------------------

Message: 6
Date: Tue, 8 Mar 2011 22:12:01 +0000 (GMT)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
Subject: Re: [amsat-bb] Fwd: Allocation of 433 ? 434 MHz Band for
Short  Range Devices in VR2
To: amsat-bb@xxxxx.xxxx " EA4EOZMiguel A. Vallejo" <ea4eoz@xxxxx.xx>
Message-ID: <507669.7882.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8

--- On Tue, 8/3/11, Miguel A. Vallejo, EA4EOZ <ea4eoz@xxxxx.xx> wrote:
> Unlicensed devices imposing restrictions to licensed users?
> I hope you
> are joking, otherwise you have a serious problem with Ofcom

No I'm not joking, when devices are sold in large numbers Governments will
protect them even if they are unlicensed.

The UK now has 15 million automoblies using 433 MHz to open the doors and
start the engine.

Is the UK Government going to say to 15 million voters they've got to pay a
lot of money to have a decent receiver installed or are they going to shut
down a few Amateur repeaters ? That's the simple choice, no prizes for
guessing which they choose.

The same will hapen in any part of the world where SRD's are allowed on
433/434 MHz - it's the number of votes that count - doesn't matter what
International Regs may say.

73 Trevor M5AKA







------------------------------

Message: 7
Date: Tue, 08 Mar 2011 14:15:50 -0800
From: Clint Bradford <clintbradford@xxx.xxx>
Subject: [amsat-bb] Re: RARE Photo of AMSAT ACs
To: Steve Meuse <smeuse@xxxx.xxx>
Cc: AMSAT BB <amsat-bb@xxxxx.xxx>
Message-ID: <A09DB763-D897-4C20-A1B6-7AB3538C0B7E@xxx.xxx>
Content-Type: text/plain; CHARSET=US-ASCII

Depending upon the audience, I'll sometimes stop to say:

"How many presentations have you attended the past decade where "slide rule"
was mentioned?"

(grin)

Clint

>> ... What's that funny thing you're holding? ;)


------------------------------

Message: 8
Date: Tue, 8 Mar 2011 14:26:35 -0800
From: "Ng, Peter" <Peter.Ng@xxxxx.xx>
Subject: [amsat-bb] Re: RARE Photo of AMSAT ACs
To: "'Clint Bradford'" <clintbradford@xxx.xxx>, Steve Meuse
<smeuse@xxxx.xxx>
Cc: AMSAT BB <amsat-bb@xxxxx.xxx>
Message-ID:
<44D6D682B38A5D4FAA2DBDE4AFD3B87D0307E74C@xxxxxxxx.xxxxxx.xxxxxx.xx>
Content-Type: text/plain; charset="us-ascii"

...primitive, but effective.  took us to the moon!

http://en.wikipedia.org/wiki/Slide_rule

Aluminium Pickett-brand slide rules were carried on five Apollo space
missions, including to the moon, according to advertising on Pickett's N600
slide rule boxes

Peter VE7NGP


-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Clint Bradford
Sent: Tuesday, March 08, 2011 2:16 PM
To: Steve Meuse
Cc: AMSAT BB
Subject: [amsat-bb] Re: RARE Photo of AMSAT ACs

Depending upon the audience, I'll sometimes stop to say:

"How many presentations have you attended the past decade where "slide rule"
was mentioned?"

(grin)

Clint

>> ... What's that funny thing you're holding? ;)
_______________________________________________
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: Tue, 8 Mar 2011 15:28:28 -0800 (PST)
From: Pete Rowe <ptrowe@xxxxx.xxx>
Subject: [amsat-bb]  Elmer
To: amsat-bb@xxxxx.xxx
Message-ID: <577393.99917.qm@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii

I have shipped an S band downconverter to Paul AC0Z. I'm sure he will need a
bit of Elmering from those of you who work the sats on 2401 MHz. Thanks to
Paul, AMSAT has a donation and I have a bit more room in my garage.
73,
Pete
WA6WOA





------------------------------

Message: 10
Date: Tue, 08 Mar 2011 18:51:38 -0800
From: Clint Bradford <clintbradford@xxx.xxx>
Subject: [amsat-bb]  Daylight Savings Time in US
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Message-ID: <1059DA44-5261-4028-A5CC-76BD6925174C@xxx.xxx>
Content-Type: text/plain; CHARSET=US-ASCII

US Daylight Saving Time Starts on Sunday

http://tinyurl.com/4pswl5y

Make sure your satellite tracking programs know about it!

Clint, K6LCS


------------------------------

Message: 11
Date: Tue, 8 Mar 2011 18:44:36 GMT
From: "WB6FFC" <eaglepoint.or@xxxx.xxx>
Subject: [amsat-bb] Re: [PNWVHFS] Fwd: Allocation of 433 �	434
MHz Band for Short R	ange Devices in VR2
To: kl7uw@xxxxxxxxx.xxx
Cc: amsat-bb@xxxxx.xxxx microwave@xxxxx.xxxxxxx.xxxx
pnwvhfs@xxxxxxxxxxxx.xxx
Message-ID: <20110308.104436.18041.3@xxxxxxxxx.xxx.xxxx.xxx>
Content-Type: text/plain; charset=windows-1252

Ed, many of the wireless WX stations here in the US are on 433 MHz as well
as some of the key-less automotive entry devices.

Mike
WB6FFC



____________________________________________________________
Get Free Email with Video Mail & Video Chat!
http://www.juno.com/freeemail?refcd=JUTAGOUT1FREM0210



------------------------------

Message: 12
Date: Tue, 8 Mar 2011 21:24:22 -0800 (PST)
From: B J <top_gun_canada@xxxxx.xxx>
Subject: [amsat-bb]  Another Terrific View Of ISS From Space Shuttle
To: amsat-bb@xxxxx.xxx
Message-ID: <485063.21317.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii

http://spaceflight.nasa.gov/gallery/images/shuttle/sts-133/html/s133e010480.ht
ml

73s

Bernhard VA6BMJ @ DO33FL






------------------------------

Message: 13
Date: Wed, 09 Mar 2011 10:19:45 -0500
From: Dee <morsesat@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Daylight Savings Time in US
To: "'Clint Bradford'" <clintbradford@xxx.xxx>,	"'AMSAT BB'"
<amsat-bb@xxxxx.xxx>
Message-ID: <B1961F5ECD8E4D089F66669CFC184403@xxxxxxxx>
Content-Type: text/plain; charset=us-ascii

Yes,
Of course we had to consider this while calculating when the pass is for our
Monday contact at a local high school.  Good thing I mentioned this a few
weeks ago....Check your tracking programs...
Dee, NB2F

-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Clint Bradford
Sent: Tuesday, March 08, 2011 9:52 PM
To: AMSAT BB
Subject: [amsat-bb] Daylight Savings Time in US

US Daylight Saving Time Starts on Sunday

http://tinyurl.com/4pswl5y

Make sure your satellite tracking programs know about it!

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: 14
Date: Wed, 9 Mar 2011 07:31:31 -0800 (PST)
From: "Patrick STODDARD \(WD9EWK/VA7EWK\)" <amsat-bb@xxxxxx.xxx>
Subject: [amsat-bb]  presentation Thursday, hamfest Saturday
To: amsat-bb@xxxxx.xxx
Message-ID: <654546.20242.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii

Hi!

The next few days will be busy for me, but definitely fun.  Tomorrow
morning, I will head out to San Diego.  I will give a presentation for
the Escondido Amateur Radio Society at their regular monthly meeting
tomorrow night at 1930 local (0330 UTC Friday) on satellite operating
away from home.  The club meets at the Escondido Salvation Army
building on Las Villas Way, east of the I-15 freeway in grid DM13kd.
More information about the club and the meeting is available at:

http://www.earsclub.org/

About 25 minutes before the meeting, there is a VO-52 pass that I hope
to be on for a demonstration.  If you hear WD9EWK on there, please feel
free to call.  Many thanks to John W9EN, the club's program chairman
(and satellite operator) for the invitation.  This will be my first time
in the San Diego area since 2004, and I'm looking forward to this.

There may be some other opportunities to work satellites from the San
Diego area, or during the driving between Phoenix and San Diego on
Thursday and Friday.  For the road trip, I will have my TH-D72A on APRS
as WD9EWK-9.  That should be visible at:

http://aprs.fi/wd9ewk-9

After heading back home on Friday afternoon/evening, I will attend the
Scottsdale Amateur Radio Club's annual spring hamfest on Saturday morning
with an AMSAT table.  The hamfest is a half-day event, starting around
0600 local (1300 UTC) and running until noon.  More information about the
hamfest, including a flyer with a map of the new location, is available
at:

http://scottsdaleamateurradioclub.ning.com/

During the hamfest, I will have demonstrations using various satellites.
If you hear WD9EWK on any of those passes, please call and say hello to
the crowds listening in on the demonstrations.

If you work WD9EWK on any satellite passes over the next few days,
whether at the club meeting Thursday evening, the hamfest Saturday
morning, or somewhere between Phoenix and San Diego on either
Thursday or Friday, I will be happy to QSL those contacts.  If you
want a QSL card, just e-mail me with the QSO details.  All QSOs
will be uploaded to Logbook of the World as well.

73!






Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/




------------------------------

Message: 15
Date: Wed, 9 Mar 2011 11:16:50 -0500
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb]  AO-51 reports indicate transmitter(s) are OFF
To: Amsat - BBs <amsat-bb@xxxxx.xxx>
Message-ID:
<AANLkTinq-fx=ZUf71pLQUqSisrzo0Lu5YWE8e84X9X45@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1

Hi All,

We are receiving and reading multiple reports that AO-51 is OFF, since
about 1400 utc today.

Additional reports will be appreciated, especially to note if the
435.150 transmitter is active or not; if ON, it should be in 9k6
packet mode.

http://oscar.dcarr.org/

It will be a few more hours (around 2100utc) before the bird is in the
footprint of a command station, so we'll hope for the best (a quick
reset after a voltage trip).

73,

--
Mark L. Hammond [N8MH]


------------------------------

Message: 16
Date: Wed, 9 Mar 2011 08:59:05 -0800 (PST)
From: B J <top_gun_canada@xxxxx.xxx>
Subject: [amsat-bb]  Welcome Back, Discovery!
To: amsat-bb@xxxxx.xxx
Message-ID: <225711.62444.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii

The orbiter just landed at Kennedy Space Centre.  It was a perfect
touch-down, a fitting end to its last mission.

73s

Bernhard VA6BMJ @ DO33FL





------------------------------

Message: 17
Date: Wed, 09 Mar 2011 10:11:30 -0800
From: "Paul Delaney - K6HR" <paul.hamradio@xxxxxxx.xxx>
Subject: [amsat-bb]  IC-821H Frontend Overload?
To: <amsat-bb@xxxxx.xxx>
Message-ID: <7E02F7F9009A4F97B97666CD8303A0B4@xxxxxxx>
Content-Type: text/plain;	charset="iso-8859-1"

I'm setting up for satellite operation and considering the AR2 SP432VDG 24db
preamp. A friend suggests this will likely overload the frontend of the
radio (an 821H) The antennas are M2 eggbeaters. Would the SP432VDA 15db be a
better choice?

Can anyone using these preamps give me some feedback on the 15db vs. 24db
preamps and which might be the best way to go considering the radio and
antennas I have?

Paul Delaney
paul.hamradio@xxxxxxx.xxx
http://k6hr.dyndns.org:8080

------------------------------

Message: 18
Date: Wed, 9 Mar 2011 13:27:30 -0500
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] Re: IC-821H Frontend Overload?
To: Paul Delaney - K6HR <paul.hamradio@xxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<AANLkTinSvYqC5Q2TQi5rTr+Ajj4fTFK9zFYd1izdOyop@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1

It's all about noise figure....I say get the AR2 SP432VDG 24db!    If
the front end is "too hot" you can use crummy coax to attenuate the
signal ;)

Does the 821H have a preamp that you could turn off if necessary?
Probably won't be necessary, but just in case...

Mark N8MH

On Wed, Mar 9, 2011 at 1:11 PM, Paul Delaney - K6HR
<paul.hamradio@xxxxxxx.xxx> wrote:
> I'm setting up for satellite operation and considering the AR2 SP432VDG
24db preamp. A friend suggests this will likely overload the frontend of the
radio (an 821H) The antennas are M2 eggbeaters. Would the SP432VDA 15db be a
better choice?
>
> Can anyone using these preamps give me some feedback on the 15db vs. 24db
preamps and which might be the best way to go considering the radio and
antennas I have?
>
> Paul Delaney
> paul.hamradio@xxxxxxx.xxx
> http://k6hr.dyndns.org:8080
> _______________________________________________
> 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
>



--
Mark L. Hammond [N8MH]


------------------------------

_______________________________________________
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 147
****************************************


Read previous mail | Read next mail


 13.04.2026 17:27:35lGo back Go up