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by Cotejaune2＠aol.com 04 Sep '06

04 Sep '06

Is ao27 back ?

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External sequencer with the IC-910H
by Stan,WA1ECF 04 Sep '06

04 Sep '06

Hello the NET: A sequencer is needed to properly transition the PA, IPA, transverter, transceiver, and preamplifier when going from RX to TX and TX to RX. The objective is to add a very short time delay to avoid sending QRO RF power into the preamplifier or into an open, just closing relay contact, like "hot switching" which significantly reduces contact life. I use my IC-706MK2 transceiver with a Lunar Link QRO amp for terrestrial modes. These techniques are applicable to any transceiver, PA, IPA preamp configuration. Just different microphone connectors are used. I apply the same techniques to the FT-847 and the FT-1000MP (IF rig). DEMI offers a sequencer kit at about 35$US, Advanced Receiver Research, SSB, JWM engineering, LNA technologies, W1GHZ, and others also offer non kit versions. The DEMI design uses relays with a 2 amp contact rating, others can be much less. All have their unique variations. I grab the microphone PTT line, before it gets to the radio, route it to the sequencer input, then take the sequenced outputs: DC power to the preamp and bypass RF relays, 2 each SPDT legal limit rated RF relays PTT, ground to TX, to the QRO PA, PTT, ground to TX, to the IPA (or transverter) PTT ground to TX, to the transceiver For RX to TX, preamp and transfer relay power is dropped, bypassing the preamplifier time delay ~ 250 milliseconds in the unmodified DEMI sequencer PA TX is enabled time delay, ~ 250 milliseconds IPA/transverter TX is enabled time delay, ~ 250 milliseconds transceiver TX is enabled for SSb , CW, FM, whatever modulation This timing constant, in the DEMI sequencer, is a RC network and can be modified for a faster time delay. For TX to RX, The sequence is reversed. Some sequencers simultaneously change all output states, without a sequenced delay. Most sequencers allow enough flexibility to configure PTT ground to TX, or PTT +V to TX Mostly with "dry"relay contact closures for a real 0.00V on grounding, unlike a solid state switch. I put the sequencer in a diecast box with a 4 pole multi position mechanical switch to route the sequencer outputs. pole #1 is for local indicator LEDS to show what band I am controlling. pole #2 for the preamp/bypass relay power pole #3 for the PA PTT control pole #4 for the IPA/transverter PTT control The transceiver PTT is always the same, and not switched. Your configuration may vary. Avoid any break in CW keying. always force TX mode (with a manual PTT switch), before using CW One switch position per band. Stan, W1LE FN41sr Cape Cod

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Re: PCSAT2 Testing on 10 meters
by Bob Bruninga 04 Sep '06

04 Sep '06

All, Marty and Walter seem to be reporting some success through the PCSAT2 10 meter PSK-31 uplink! Here is a preliminary report, and it seems to imply that the frequency is off and so that may be why many people have had no success. I am stealing their thunder here to encourage others to try the transponder if they have plenty of uplink power on 10 meters. > He starting drifting down in frequency, and I could see it > come up on the water-fall in MIXW, when he was 3.6khz > lower that what it was supposed to be. > > I was not able to decode any data, but the data stream > was there, and we validated that it was him, by when he > un-keyed, and re-keyed, it went away, and returned > respectfully. Thanks for the testing! Only a few days to go before PCSAT2 goes QRT. (first EVA shut down will be 9 Sept). The PSK-31 FM downlink is on 435.275 and the uplink is supposed to be 29.400 to 9.403, but the report above suggests it might be below 29.400 a few KHz. To activate the PSK-31 transponder, send a AX.25 connect request to PCSAT2 on the 145.825 packet uplink. de Wb4APR, Bob

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Icom CT-16
by Stargate 04 Sep '06

04 Sep '06

Would there be any advantages/disadvantages to current or future satellite operation when using 2 Icom 706mk2G's and a CT-16 satellite converter? Thanks, RoD KD0XX

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Disregaerd...
by Tim Tapio 04 Sep '06

04 Sep '06

Got it off the tape.I wrote Q instead of K..old age is settling in.. Tim T.

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M-V-7 Flight Sequence
by Mineo Wakita 04 Sep '06

04 Sep '06

22Sep06 21:00-22:00, 1st stage ignition 75 sec: 2nd stage ignition, 1st stage separation 186 sec: Nose fairing open 200 sec: 2nd stage separation 202 sec: 3rd stage nozzle extension 347 sec: Attitude turn start 400 sec: Attitude turn end 510 sec: Spacecraft separation 683 sec: Sun search start 830 sec: HITSAT separation 990 sec: SSSAT separation 34 min: SAP panel deploy 40 min: Sun pointing establish http://www.isas.jaxa.jp/e/countdown/index.shtml --------------------------------------------- Name: Mineo Wakita / JE9PEL, JAMSAT member Mail: ei7m-wkt(a)asahi-net.or.jp URL : http://www.ne.jp/asahi/hamradio/je9pel/ QTH : Yokohama Japan, GL:PM95TJ Date: Sep 4, 2006 ---------------------------------------------

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WD9EWK AO-51 V/S, Sunday 3 Sept.
by Patrick STODDARD (WD9EWK/VA7EWK) 03 Sep '06

03 Sep '06

Hi again! Another day, another chance (or two) to make more V/S QSOs via AO-51 before the mode change. I woke up a little early this morning, so I decided to combine a quick shopping trip with a trip to a nearby city park that sits on the DM33/DM43 boundary. I was on the AO-51 pass around 1550-1600 UTC from the park with my portable V/S setup, and made 7 QSOs. The most activity I've heard in the 5 AO-51 passes I've tried since Friday. I worked W0LMD (CO), KU7Z (UT), N8BBQ (OH), W2NBJ (MD), KB0JQO (IA), WA4SCA (TN), and AI7W (OR). On the next pass, around 1730 UTC, I was back home and worked W0LMD and KU7Z again - the only ones on there with me. I was in the driveway in front of my house, using the car as my base of operations again. For much of the pass, I left the 2m Yagi laying on the car's roof and took the downconverter in one hand to point and twist it. AO-51's 145.920 MHz receiver is very sensitive, even when my Yagi was pointing parallel to the ground and the satellite was up at 20-30 degrees elevation. Assuming the mode change happens tonight (early Monday, UTC time), this will be the last chance to try V/S for a little while. I made 14 contacts on 5 different passes. I worked two stations on each of 3 passes (W0LMD, KU7Z), and those stations were in 10 different states. When I grow up :-) I would like to set up a proper satellite station at home. Until then, I am happy to be able to set up portable stations and do this stuff. Fun stuff, even if it is 95F/35C outside at the moment. 73! Patrick WD9EWK/VA7EWK - Phoenix, Arizona USA http://www.wd9ewk.net/

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WD9EWK and AO-51 V/S, Saturday (2 Sep) morning
by Patrick STODDARD (WD9EWK/VA7EWK) 03 Sep '06

03 Sep '06

Hi! I took a short drive to a nearby park that straddles 112 degrees West longitude (the DM33/DM43 boundary), and set up for a low western pass for AO-51 around 1808-1818 UTC. Maximum elevation was only 10 degrees, but I wanted to give it a try with my portable V/S setup I've started using. No contacts, but I know I could hear the S-band downlink from about 4 or 5 degrees elevation from that location. I had a lot of time to talk to myself. :-) An impressive thing, the AO-51 S-band downlink. Very easy to hear even at low elevation, and I'm hoping to try at least one pass tonight and one Sunday morning before the mode change. 73! Patrick WD9EWK/VA7EWK - Phoenix, Arizona USA http://www.wd9ewk.net/

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I: ionic propulsion motor
by Francesco Grappi 03 Sep '06

03 Sep '06

HI Luc, Very interesting animation and explanation ... Thank you 73" Francesco IW4DVZ -----Messaggio originale----- Da: amsat-bb-bounces(a)amsat.org [mailto:[email protected]]Per conto di Luc Leblanc VE2DWE Inviato: sabato 2 settembre 2006 9.27 A: AMSAT-BB(a)amsat.org Oggetto: [amsat-bb] ionic propulsion motor HI Here is a link explaining the ionic motor propulsion system with a nice animation (in French) the SMART-1 first lunar European space probe will crash on the moon on September 3 at 0541 UTC. Could be usable for our HEO fleet? It seems pretty simple at the first look. http://www.radio-canada.ca/nouvelles/AFPanimation/SmartFR3008/ "-" The medium is the message...The content is the audience...;) Luc Leblanc VE2DWE Skype VE2DWE www.qsl.net/ve2dwe _______________________________________________ Sent via AMSAT-BB(a)amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb

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Icom 910 Aux Switching
by Bruce 03 Sep '06

03 Sep '06

Keith With the help of K5VH I was already working on your question of aux switching the 910. I'am working towards using my 70 watt amp for TX L-band. Per Toms help I am using a reed relay from radio shack & perf board. I was successful in using the ACC socket, pin 2 & 3 to switch the relay on & off, controlling 12V to my 1270 Mhz amp PTT. Works great when you key the mike & with Wisp it correctly TX's my TNC & 1270 amp automatically. 73 Bruce KG4YEV

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