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Hmmm....now I need to save money to get a Quasar 70cm. /sigh
So many projects, so little time (and money!).
So many projects, so little time (and money!).
my dual band HT fell off my speaker and broke the antenna base and the volume knob shaft. I may have to get one of those cheap-a$$ Baofeng radios. Mine was a Kenwood G-71 that my BIL gave me and it will cost me too much to get it repaired.Hmmm....now I need to save money to get a Quasar 70cm. /sigh
So many projects, so little time (and money!).
The Eggtimer website doesn’t yet show the Quasar Assembly Instructions Document.No accelerometer. I wanted to put one in originally, but the one that we use in the Proton (which was the only reasonably priced high-G accelerometer around) went EOL, and a replacement would be much more expensive. I didn't want to have to jack up the price a lot for a feature that is, frankly, not really essential for most flyers. BTW, we are re-doing the Proton around a different accelerometer... and unfortunately the "new" Proton is going to cost more.
Thanks. That’s what I’ll be needing to do.Correct... we don't post the documents until we have the final production boards, since we need take assembly pictures. We don't like to do that with prototypes... the boards don't look the same.
The Quasar is a single-battery design (like the Quark), that makes powering it easier. If you need to shut off the power, just put a switch on the battery leads, like you would do with any other altimeter. The GPS in the Quasar generally acquires a fix very quickly... typically in 30 seconds or less. The large ground plane (compared to the Mini, for example) makes a big difference.
There IS a way to use a pull-pin switch just on the deployments... maybe I'll put that in the docs.
Because I can. That's about it.What if any, is the advantage of the 70cm ham band to the 900 MHz band? Just curious...
outside of what is mentioned above, it is easier to place 900 Mhz antennas within the airframe that has less impact to the radiation pattern of the antenna. Generally speaking you try not to have much of anything within a wavelength of the antenna that can alter the impedance which in turn changes the resonance of the antenna and thus the efficiency of putting RF out. This is the biggest obstacle to get the best range. In reality it is almost impossible inside a rocket (outside is best but...). If you have the means, tuning the antenna in the place where it will transmit from is best (if the antenna can be tuned). yes wandered waaay off topicWhat if any, is the advantage of the 70cm ham band to the 900 MHz band? Just curious...
The 900 MHz transmitter is compatible with the current Eggtimer GPS receiver equipment.outside of what is mentioned above, it is easier to place 900 Mhz antennas within the airframe that has less impact to the radiation pattern of the antenna. Generally speaking you try not to have much of anything within a wavelength of the antenna that can alter the impedance which in turn changes the resonance of the antenna and thus the efficiency of putting RF out. This is the biggest obstacle to get the best range. In reality it is almost impossible inside a rocket (outside is best but...). If you have the means, tuning the antenna in the place where it will transmit from is best (if the antenna can be tuned). yes wandered waaay off topic
I have done a bunch of university team inspections and they do not seem to know about the "magic" of RF. Buried antennas in the ebay, right next to the support rods, right next to the GPS antenna, need a whole class on that.
I have found that once on the ground, along with what Cris said in the air, is you have about 2-3 times the distance to get something (favoring 70cm). Receiver sensitivity and antenna are big factors here.
David
HI HI de K6OIBecause I can. That's about it.
73 de W5NNH
I ordered 2 Quasars with the OpenLog option. OpenLog is an add on board that writes the data output to a microSD card. From the holiday sale page:Is this able to record GPS data (internally or on an add-on board)? Asking before I order one in the next day or two.
I've had a few people ask for a picture of the bottom (where most of the components are), so here it is. It's similar to a Proton in parts count. We got a shipping notice for the PC boards, so assuming that our shipment of RF modules comes in as expected we should be able to ship these out around the end of November.
View attachment 546703
Thank you! I totally understand.I'll see what I can do, but it may be a few days. I'm really busy just trying to catch up with invoicing and shipping what we have in stock.
The assembly guide is now on the Eggtimer Rocketry web site...
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