[amsat-bb] Re: 2 ht vs. 1-duplex ht

Zachary Beougher zack.kd8ksn at hotmail.com
Fri Jan 28 06:15:33 PST 2011


Hi Patrick!

>>>For most FM satellite work, the S-meter is an amusement at
most.  You're working based on what you hear, since the
downlinks are generally weak.  If you hear the ISS, the S-meter
may be pegged due to that downlink's strength.

Again, this is an area in which I was spoiled by the G71A.  On a typical 
AO27, HO68 and SO50 pass the s-meter generally peaks S5-S7, and on an AO51 
pass (with it running over a watt), it is almost always S7-S9.  With the ISS 
it is obviously S9.

Time to pull the D7 out and give it another try.

73!

Zack
KD8KSN

-----Original Message----- 
From: Patrick STODDARD (WD9EWK/VA7EWK)
Sent: Friday, January 28, 2011 12:51 AM
To: amsat-bb at amsat.org
Subject: [amsat-bb] Re: 2 ht vs. 1-duplex ht

Hi Zack!

> You are the go-to guy for any Kenwood HT questions - have you owned/used 
> all
> of them??? ;-)

Not exactly  Until the past 3 months, I have not owned any
Kenwood gear since the mid-90s.  The G71 was my ex-wife's
HT, and I used it for some satellite work a few years back.  A
nice radio.  I've bought two new Kenwood HTs since November,
a TH-F6A I use for my SSB work and the TH-D72A I've written
about here.  Good radios.

> The toggling between VFOs was not as big of an issue for me (like you say,
> small price for a full duplex HT), but the receiver seemed weak.  I know I
> commented a few weeks ago about the 8800 having a weak receiver, but I 
> think
> after using the G71As for so long, I got spoiled with the receiver in it.

I haven't tried out the D7's I picked up recently.  I need to get
new battery packs for them, and then I can try to work the
satellites with them.  Pair the D7's up with an Elk antenna, and
I'll have two stations ready to go for FM satellites.  And ready
to be left somewhere, for someone else to use...

> The s-meter is also practically useless on the D7.  You have to toggle 
> back
> and forth between bands to see it, and it also never goes above approx.
> s3-s5, on a good pass.  It makes it difficult, especially when a bird is
> quiet, to tell if you are on it or not.  You need to have keen ears to 
> tell
> whether you are listening to the carrier or noise.

For most FM satellite work, the S-meter is an amusement at
most.  You're working based on what you hear, since the
downlinks are generally weak.  If you hear the ISS, the S-meter
may be pegged due to that downlink's strength.

> I didn’t use the D7 for much satellite work before I went back to the G71A
> for receive, so I probably need to try the full duplex again and give a 
> more
> accurate observation.

Give it another try, and don't worry about S-meter readings.
Most of the time on any of my radios, I see no movement on
the FM passes.  On SSB, that can be very different.

73!






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

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