Thanks Kurt. I'll put it on my wish list. On Wed, Jun 17, 2015 at 6:23 PM, Kurt <[email protected]> wrote:
> Yes, > > I have one. The F6A is a nice unit and has the potential of being able > to track the > stuff on the 1.25cm band because it can receive in several different modes > on VFO B. (hi-SSB, lo-SSB or CW modes) > Stick an offset attenuator on your YAGI and you're in business. > This one is pretty decent: > > http://www.west.net/~marvin/k0ov.htm > > You can lookup schematics or other kits too. Alot easier spinning a pot > than changing antennas or what have you. > > One needs to keep in mind if one's rocket is lying in an open area, piece > 'o cake > to find it via RDF. If it's hiding in tall grass, corn, between > hedgerows, in furrows and shallow depressions, > that's when being able to hold an accurate bearing up close will help you. > > If you are using a GPS tracker and are able to get this close, you'll be > receiving a valid > GPS packet unless there is some malfunction with your tracker or it's not > receiving a > vaild lat/long. In that case, if it's hidden, being able to home in via > RDF might be useful. > > Heck, the open squelch technique is perfectly valid and I use it every > time with an APRS tracker. > For a rocket that's down, if one can open the squelch and faintly "hear" a > packet that's too distorted to be decoded, viola' they know > immediately the APRS tracker is still working. This is especially > reassuring for a flight where there is no visual confirmation > of any of the events. If one sees valid altitudes coming across, they can > surmise by the rate of descent reported that the > drogue has deployed and the main made it out. Walk to the last known > reported position and likely one will receive > the position of the final resting place if the rocket is not already seen. > > This is where GPS tracking really shines on flights where small rockets go > "way high", "way fast" and land "way far" away. > Way far away may just be just 1/2 mile. My Wildman Jr., I nor anyone else > has ever seen a complete flight on the five J motors > I've flown in it. Every time the rocket disappears I can tell the events > have occurred and which direction to try to look for the main chute. > Never seen it under the main but the altitude indications show it's > deployed and it looks nice as can be when walking up to it. > One of these days I'll fly it on an I motor to see what is looks like. Oh, > I do pop the main at 1000' to increase the chances it's seen. > Kurt KC9LDH > > > -------------------------------------------- > On Wed, 6/17/15, Chris Attebery <[email protected]> wrote: > > Subject: Re: [altusmetrum] RDF on the cheap > To: "Altus Metrum" <[email protected]> > Date: Wednesday, June 17, 2015, 2:02 PM > > Do any of > you have experience with the Kenwood TH F6A HT? There are a > couple on ebay for reasonable prices. > > _______________________________________________ > altusmetrum mailing list > [email protected] > http://lists.gag.com/mailman/listinfo/altusmetrum >
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