I track my walston on 217.084 all the time with my fm reciever. I actually
witch it back and fourth from am to fm, doesn’t seem to affect anything in
the bird becon sense....
-----Original Message-----
From: Kurt
Sent: Tuesday, June 02, 2015 2:13 PM
To: Altus Metrum
Subject: Re: [altusmetrum] DF with Yaesu VX-6R
Yes,
By all means they work. Just don't go buy an FM 1.25M (220Mhz) Ham rig and
expect it to do rocket hunter or walston
tracking at range. They use different modulation and you won't be able to
tune any run of the mill ham rig to their
frequencies. Trust me, I made that very mistake in the beginning. A TH-F6A
may be workable but the best receiver for those
devices are likely the pricey ones provided by the manufacturer. Kurt
--------------------------------------------
On Tue, 6/2/15, Kevin Trojanowski <[email protected]> wrote:
Subject: Re: [altusmetrum] DF with Yaesu VX-6R
To: "Altus Metrum" <[email protected]>
Date: Tuesday, June 2, 2015, 8:13 AM
You can do RDF with any 70cm handheld
with a Tele* product. You don't need to decode the packers
for RDF
-Kevin
On Jun 2, 2015, at 7:44 AM, Kurt <[email protected]>
wrote:
The ham stuff is only good with FM trackers only.
Walston/Comspec use SSB or CW modes that
perhaps a Kenwood F6A might be workable with.
I've ground tested but not done any range checking.
Arrow sells an offset attenuator and so does Marvin
West: http://www.west.net/~marvin/k0ov.htm
I've also have one of his 2 Meter beacons for
fun: http://www.west.net/~marvin/microhnt.htm
I thought Keith was using a VX-8GR and then went with
an FT1DR for APRS tracking. The -6R doesn't do APRS but
could be used for FM RDF. Loop antenna might not be as
sensitive at range than a yagi.
A good offset attenuator like Marvin's helps very close
so I don't think you have to invest in a loop.
I've never seen anyone use a loop in six Midwest Powers
I've attended. Granted a loop is smaller and easier to
carry. If you can get close enough with a
Yagi/attenuator, you should be able to find it.
Kurt KC9LDH
-------------------------------------------
On Mon, 6/1/15, Max McHatton <[email protected]>
wrote:
Subject: Re: [altusmetrum] DF with Yaesu VX-6R
To: [email protected]
Date: Monday, June 1, 2015, 9:48 PM
Rob, Kevin stated correctly, that
you will need a directional antenna and attenuators or
a
variable attenuator. An in-line analogue signal
strength meter is also very usefull. I used my
VX-6R
last year, during my successful L-2 flight. I had
a 3
element arrow yaggi antenna. I didn’t yet have
an attenuator. So I utilized a trick I learned
when
DFing ELT’s. When I got close, I disconnected
the antenna. WARNING: Do Not Transmit without an
antenna. A loop antenna is more directional than
a
yaggi; so I plan to buy one, and a set of in-line
attenuators. There are some other helpful tricks,
like
body shadowing to determine if the signal is in front
or
behind. Another trick I tried with limited
success was
utilizing the top null of a whip. Most whip
antennas
have a radiation pattern like a doughnut, with a null
on
top. So theoretically, if you pan the HT
horizontally,
you should have a null, when pointing the whip antenna
directly at the RF source. Max Mc in
Medford
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