Differences

This shows you the differences between two versions of the page.

--- projects:jimbob [2013/09/28 15:50] – kevwal
+++ projects:jimbob [2020/05/21 08:44] (current) – [Launches] kevwal
@@ Line 1: / Line 1: @@
-====== Project JimBob & HabTrk ======
+====== Project Master - Kevin Walton ======
 This is the master page for all of my Near Space Ballooning projects
@@ Line 18: / Line 18: @@
   * [[projects:jimbob:habtrk|HabTrk V006 - B1]] - V006 Board 1 - Successfully worked in Launch 3
   * [[projects:jimbob:habtrkv006b2|HabTrk V006 - B2]] - V006 Board 2
+===== HabSml =====
+Aiming for smaller and lighter than HabTrk, using TPS61200 for improved voltage regulation and [[guides:crystal_pulling|crystal pulling]] for [[http://ukhas.org.uk/guides:rfm22b#dominoex|DominoEX]] with an RFM22B.
+   * [[projects:jimbob:habsml|HabSml V007 - B1]] - V00X Board 1 - In progress
 ====== Launches ======
@@ Line 24: / Line 30: @@
   * [[projects:jimbob:launch2|Launch 2 - awaiting HabTrk for backup tracker]]
   * [[projects:jimbob:launch3|Launch 3 - Foil launch using just HabTrk V006 tracker - Completed 07/08/13]]
+  * -
+  * [[projects:jimbob:launch4|Launch 4 - Foil launch using TTGO TBEAM tracker]]
@@ Line 30: / Line 40: @@
   * [[projects:jimbob:frequency|Frequency - documentation of my own thoughts on frequency use]]
+  * [[projects:jimbob:Radiosonde|Radiosonde - playing with a RS41-SG Radiosonde from Tom]]
-Frequency range legally available is 434.04MHz - 434.79MHz according to IR2030.
-Point in time analysis using SDR and external collinear:
-  * 434.040MHz - Start of legal band
-  * 434.046Mhz - Weak interference
-  * 434.075Mhz - NTX2
-  * 434.078Mhz - Weak interference
-  * 434.099Mhz - Weak interference
-  * 434.110Mhz - Weak interference
-  * 434.112Mhz - Weak interference
-  * 434.121Mhz - Weak interference
-  * 434.127Mhz - Weak interference
-  * 434.169Mhz - Medium interference
-  * 434.267Mhz - Weak interference
-  * 434.320 to 434.330 - Strong interference
-  * 434.330Mhz - Weak interference
-  * 434.347Mhz - Weak interference
-  * 434.361Mhz - Weak interference
-  * 434.369 to 434.379 - Strong interference
-  * 434.375Mhz - Emergency Comms
-  * 434.392Mhz - Weak interference
-  * 434.475Mhz - Internet voice gateway, 25khz
-  * 434.500Mhz - Internet voice gateway, 25khz
-  * 434.518Mhz - Weak interference
-  * 434.525Mhz - Internet voice gateway, 25khz
-  * 434.550Mhz - Weak interference
-  * 434.581Mhz - Weak interference
-  * 434.600Mhz - Repeater input, 25khz
-  * 434.613Mhz - Weak interference
-  * 434.625Mhz - Repeater input, 25khz
-  * 434.650Mhz - NTX2
-  * 434.650Mhz - Repeater input, 25khz
-  * 434.675Mhz - Repeater input, 25khz
-  * 434.700Mhz - Repeater input, 25khz
-  * 434.725Mhz - Repeater input, 25khz
-  * 434.750Mhz - Repeater input, 25khz
-  * 434.775Mhz - Repeater input, 25khz
-  * 434.790Mhz - End of legal band
-Thinking about frequency spacing, to be able to receive multiple transmissions with one dongle:
-Typical RTTY bandwidth is 650Hz, we probably want at least 3,000Hz gap to keep audio spectrum separate.
-Frequency drift research is very difficult, actual examples found are down at 1.1 or 5.7khz, advice is that they could drift 20khz.  50khz spacing seems a reasonable suggestion to allow for +20khz of one and -20khz of another.
-We want to restrict the spacing to the FunCUBE Dongle bandwidth of 192,000hz, 50khz plus drift fits easily within this bandwidth.
 Any questions you can get in touch with me at kevin a t unseen d o t org.