September 2006 - AMSAT-BB - mailman.amsat.org

XE2AT NEW GRIDS !!!!!!
by Alvaro de Leon Romo 04 Sep '06

04 Sep '06

Hi boys tomorrow Tuesday 5th I will fly to a little town close to the DL75/76 boundary. I will try if the pasangers are in time to be in both pass of AO51 1434 and 1612 UTC, cross your fingers :-) GL to all 73 de Al XE2AT Ps I have almost 15 QSLs to answer , sorry about delay but I have some problems with the printer, I will send back soon, be patience :-) my status is now 99.9 in answer the QSLs _________________________________________________________________ Platica con tus amigos en linea con MSN Messenger http://messenger.t1msn.com.mx/

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9k6 satellite signal source SO-33
by Andrew Glasbrenner 04 Sep '06

04 Sep '06

I was playing around with my 9k6 digital equipment today, and found SO-33 is a pretty decent signal source when AO-51 and GO-32 are not around. Not much to see, but will serve in a pinch. SEDSAT-1 > TIME-1 :Uptime is 001/13:25:00 SEDSAT-1 > -1 SEDSAT-1 > TIME-1 :Uptime is 001/13:27:00 SEDSAT-1 > -1 [SAT-1 > j:|,-96: SEDSAT-1 > TIME-1 :Uptime is 001/13:28:00 SEDSAT-1 > -1 SEDSAT-1 > TIME-1 :Uptime is 001/13:29:00 SEDSAT-1 > -1 Z>wSAT-1 > @Sjx-64: SEDSAT-1 > TIME-1 :Uptime is 001/13:31:00 73, Drew KO4MA AMSAT LM 2332

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IC-475 Repair Inquiry
by Roy 04 Sep '06

04 Sep '06

I am having a problem in the PLL section of my IC-475 radio. It doesn't appear to be the classical "bad trimmer capacitor" problem seen in a Google search for Icom Radios. In my case the 30.72mHz Reference Oscillator, Q17, is not operating. I would like to hear direct from anyone else having that problem. I would also like to find out how to access the Icom Service Bulletins/Notes for these radios. I used to be able to go directly to a library of these notes but they seem to have either walled them off from direct access or I am not searching in the right URLs now. -- Roy -- W0SL

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Miscopied call
by Tim Tapio 04 Sep '06

04 Sep '06

I had an N3 station call me this morng.I wrote down N3PQC in FN21 (PA). I either transposed letters or got the whole thing wrong.. Could the station please give me the correct call? I haven't been able to pick it out from the tape. Only my third contact. 73 de Tim, K4SHF FM04

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(no subject)
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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