February 2019 - AMSAT-BB - mailman.amsat.org

MarconISSta spectrum analyzer experiment results
by Scott 10 Feb '19

10 Feb '19

Hello everyone. Sometime around 5-Feb-2019, there was an appeal from the Project Team running the MarconISSta spectrum analyzer experiment on the ISS for Amateurs to transmit on 70cm when the ISS was visible. The reason for this was because apparently the experiment was going to be powered off in just a few days. https://marconissta.com/2019/02/05/urgent-call-all-power-to-the-iss/ Along with a lot of other folks world-wide, I chose a frequency not "claimed" by anyone else nor close to other cubesats & transmitted a constant tone (FM) with a periodic 1200 baud packet ID through several passes of the ISS during the period requested. Thanks to a tweet from IW1DTU (I believe correct call sign), https://twitter.com/supertrack_it/status/1094665078853562369 ... I was alerted to the fact that there were result graphs online from the MarconISSta project. https://marconissta.com/2019/02/08/all-power-to-the-iss-first-results/ Using the dates, times, & frequency that I had transmitted, I'm pretty sure that I found myself on a couple of the waterfall graphs. Nothing surprising or particularly unique here, but I thought it was pretty neat to match up my transmission to their results. Here is a tweet I posted on this with an image showing "me". https://twitter.com/scott23192/status/1094681761458597889 73, -Scott, K4KDR

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Re: [amsat-bb] IC9700 Update
by Bob Hammond 10 Feb '19

10 Feb '19

Thanks! Astron it is. Bob W7OTJ On Sun, Feb 10, 2019 at 8:56 AM David J. Schmocker <kj9idave(a)charter.net> wrote: > Bob: > I echo Frank¹s good input. I would append this with recommendation to use > a linear (not switching) Astron Power supply because they¹re electrically > quiet. If your P/S needs to power the radio only, an Astron RS-35M would > be large enough. On the other hand, if you also need to power other > devices (such as linear power amplifier), then you¹ll need to go bigger or > use multiple RS-35Ms, etc. Remember the ratings on these P/Ss are > Intermittent Carrier as used in Amateur Service (ICAS) meaning 50% > (approx.) duty cycle.. Great for CW or SSB. However for any full duty > cycle mode such as WSJT, FM? etc, then you need to derate the power supply > so it¹s capabilities are not exceeded. > Switch-mode Power Supplies (switching supplies or 'switchers¹) are smaller > and lighter weight with the trade-off that they generate electrical noise > (because of how they regulate the output level) and inherently are noisy. > Linear supplies are bigger and heavier (and less power-efficient) but for > those trades, one gets absolute electrical quiet performance because they > don¹t hot-switch power signals away from a zero-crossing. If you wish to > see an animated Œhow switching power supplies work¹ video (approx. 14 > minutes), here¹s one I share when explaining this concept. > https://www.youtube.com/watch?v=vwJYIorz_Aw > > Very 73, > > Dave KJ9I > > On 2/10/19, 10:32 AM, "AMSAT-BB on behalf of Frank" > <amsat-bb-bounces(a)amsat.org on behalf of K6FW1(a)verizon.net> wrote: > > >I have used Astron power supplies for years. Pick the appropriate > >current rating. > > > >Frank > >K6FW > > > >> On Feb 10, 2019, at 7:15 AM, Bob Hammond <propgrinder(a)gmail.com> wrote: > >> > >> I'm ready to order mine along with a power supply. Any suggestions on > >>PS? > >> > >> Bob W7OTJ > >> > >> On Sat, Feb 9, 2019 at 8:21 PM Thomas Schaefer <ny4i(a)ny4i.com> wrote: > >> > >>> FYI - When I ordered mine from DXEngineering (due to the reservation I > >>> placed), they said if the price drops from the $2098 before it ships, > >>>it > >>> will sell for the lower price. That also do not charge one¹s credit > >>>card > >>> until it ships. > >>> > >>> Tom NY4I > >>> > >>>> On Feb 9, 2019, at 9:44 PM, radiomb <radiomb(a)bellsouth.net> wrote: > >>>> > >>>> Just purchased a IC9700 today at Hamcation. It was great to see one > >>>>in > >>> person. I got it for $1995. Icom said all back orders should be filled > >>>by > >>> end of April. They said they should have enough in stock so that anyone > >>> that wants one at Dayton can get it. I was happy to get it for $1995. > >>>No > >>> tax or shipping. > >>>> _______________________________________________ > >>>> Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available > >>>> to all interested persons worldwide without requiring membership. > >>> Opinions expressed > >>>> are solely those of the author, and do not reflect the official views > >>>>of > >>> AMSAT-NA. > >>>> Not an AMSAT-NA member? Join now to support the amateur satellite > >>> program! > >>>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb > >>> > >>> _______________________________________________ > >>> Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available > >>> to all interested persons worldwide without requiring membership. > >>>Opinions > >>> expressed > >>> are solely those of the author, and do not reflect the official views > >>>of > >>> AMSAT-NA. > >>> Not an AMSAT-NA member? Join now to support the amateur satellite > >>>program! > >>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb > >>> > >> _______________________________________________ > >> Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available > >> to all interested persons worldwide without requiring membership. > >>Opinions expressed > >> are solely those of the author, and do not reflect the official views > >>of AMSAT-NA. > >> Not an AMSAT-NA member? Join now to support the amateur satellite > >>program! > >> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb > > > >_______________________________________________ > >Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available > >to all interested persons worldwide without requiring membership. > >Opinions expressed > >are solely those of the author, and do not reflect the official views of > >AMSAT-NA. > >Not an AMSAT-NA member? Join now to support the amateur satellite program! > >Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb > > >

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FT-847 ISS Voice
by NA1SA Loon ?? 10 Feb '19

10 Feb '19

Attempting to set up ISS voice frequencies on a Yaesu FT-847 using OmniRig CAT control. Enter 145.800 FM for RX and 144.490 FM for TX. Rig recognizes frequencies when ISS is selected, and tracks for doppler. When I push PTT, I get "ERROR" on the TX Frequency. Any thoughts on how to correct the problem? Loon NA1SA

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Dopler Adjust in IC-7100
by lu9cbl＠gmail.com 10 Feb '19

10 Feb '19

Hi to all! In my groundstation, i'm have orbitron to track the satellite, and WISPDDE to interact with the rotor (Yaesu) and the transceiver (IC7100). Reading the WispDDE software (from the source code that it's publicly available), we use the template of IC-910 to command the equipment, but acctually have a problem when we try to adjust dopler correction via USB, for both VFOs. Aparently to adjust the frequency of the VFOB, need first to put this VFO in the MAIN VFO. It's there any way to adjust the frecuency via USB, for BOTH VFOs (A and B), but mantain the MAIN VFO only for the VFO A? i cant find any information in the equipment manual. Thanks in advance. Mati LU9CBL --- El software de antivirus Avast ha analizado este correo electrónico en busca de virus. https://www.avast.com/antivirus

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G-5500/LVB Tracker
by George Sakai 10 Feb '19

10 Feb '19

Has anyone experienced problems with the Elevation or Azimuth indicator (meter) of G-5500 rotator ? The Elevation meter does not move at all. The LVB Tracker shows correct Azimuth and Elevation angles and the G-5500 rotator follows the correct angles. However, the Elevation meter of G-5500 remains at zero degree. The Azimuth meter works just fine. Thanks. 73, George N3GS

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IC9700 Update
by radiomb 10 Feb '19

10 Feb '19

Just purchased a IC9700 today at Hamcation. It was great to see one in person. I got it for $1995. Icom said all back orders should be filled by end of April. They said they should have enough in stock so that anyone that wants one at Dayton can get it. I was happy to get it for $1995. No tax or shipping.

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rotor feedback please?
by David J. Schmocker 10 Feb '19

10 Feb '19

Hello everyone: Has anyone direct experience using ProSistel PST-RR-55D ring or Creative Design ERC-51D or ERC-5AD (DC motor if there is one of these available)? with satellite antennas specifically a WiMo WX-220 2m RHCP cross-polarity yagi 4.3kG and 4.7m long boom, and also Helix 70cm per G3RUH design 16 Turns, 4.0 kG 2.8m boom length. These will be on a standard cross-boom of fiberglass tube which is 0.250 inch wall 2 inch OD). Please share good or bad rotator experiences. My personal requirement is to build major over-design capability into rotators because my experience (in the upper midwest) includes ice, snow, winds and I don¹t climb so I must rely on hired help for repairs. What has been your direct experience with these ProSistel and/or Creative Design rotors please? Thank you Very 73, Dave KJ9I

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SSTV suggestion
by Greg D 10 Feb '19

10 Feb '19

Hi folks, A quick suggestion for future SSTV events... I notice that with the 12 images sequence, and current orbit times, every pass tends to have the same images come up. I recorded several passes today, and have several full or partial copies of the same images (7, 8, and 10). Could we add or remove a few images so that the sequence is different each time the Station comes around? Probably easier than implementing a randomization routine, unless that's already present. Thanks, Greg KO6TH

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Re: [amsat-bb] ISS-SSTV
by Roy Dean 09 Feb '19

09 Feb '19

Do you guys have your times correct? The email below was sent at 17:36z. --Roy K3RLD > Got a picture on the 1911 UTC pass in EM79ji. Steve AI9IN On 2019-02-09 > 12:19, alex weimer wrote: > Great resolution even at 10 degree pass 2 > pictures at 1810Z > _______________________________________________ > Sent > via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available > to > all interested persons worldwide without requiring membership. Opinions > expressed > are solely those of the author, and do not reflect the official > views of AMSAT-NA. > Not an AMSAT-NA member? Join now to support the > amateur satellite program! > Subscription settings: > http://www.amsat.org/mailman/listinfo/amsat-bb

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FUNcube Warehouse Development
by David Johnson 09 Feb '19

09 Feb '19

Hi, A quick heads-up to say that there may be several short outages over the next few days as I add more features. As always, the Dashboards will catch up when the server comes back online. Will keep you updated. 73 - Dave, G4DPZ

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