AMSAT-BB August 2013

110 participants
149 discussions

Re: Help with 75 mtr Qrn problem
by Dave Larsen PhD 03 Aug '13

03 Aug '13

I have called PG&E and the guy came out with a 430 Rx with a beam saying it's not there problem - humm - The Lev stays at a S-7 and then when sun comes up it goes to a S-9 20 over both Ants were fine for 2 years .. then the QRN .. it did go away for about 1 week now back for 1 month Tnx for all responce . Dave ----- Original Message ----- From: "K4FEG" <K4FEG(a)K4FEG.COM> To: "Dave Larsen PhD" <doc(a)volcano.net> Sent: Friday, August 02, 2013 3:50 PM Subject: Re: [amsat-bb] Help with 75 mtr Qrn problem > On 8/2/2013 05:23 PM, Dave Larsen PhD wrote: >> I have 2 dipoles up at 60+ ft - one set running East-West other North >> South .. From 2.6 to 5 Megs I >> have a S-7 Qrn lev at 4 Am .. buy noon I have a 10-20 over QRN Lev .. I >> live on 10 acres and have >> turned off main power to house and still have QRN .. so not coming from >> anything in house .. This one >> has me stumped .. 6 moths ago my Qrn was a S-2 .. waiting for a G6 radio >> to try and track this down >> but does anybody else have any idea's ? >> >> Tnx >> >> Dave >> N6CO >> _______________________________________________ >> 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 >> >> > there is a possibility that you have a nearby electrical transformer that > has a corroded connection on it, these connections can be a major source > of noise and they will come and go with changes in humidity or > precipitation. will it suddenly stop at times are is it a fairly constant > level? > > your local utility company can find and repair these connections but they > need a better idea of the direction it is from your QTH. > > Those are my thoughts on your problem > Good Luck > Frank; > K4FEG

5 4

Re: Newbie needs advice on which transceiver to get
by Angelo Glorioso 03 Aug '13

03 Aug '13

Alan, Thanks for the reply. I usually don't reply to many emails here, but I feel this was necessary. I bare to disagree with you Alan. If I would have known the rig had a birdie right on the downlink frequency of two of the most popular fm birds, I would not have purchased the rig years ago. Making a statement of a "few quirks" does not give a person a fair assessment of the rig. I just feel it is a very important fact. Angelo / N5UXT > ----- Original Message ----- > From: "Alan" <wa4sca(a)gmail.com> > To: "'Angelo Glorioso'" <n5uxt(a)hotmail.com> > Sent: Friday, August 02, 2013 2:14 PM > Subject: RE: [amsat-bb] Re: Newbie needs advice on which transceiver to > get > > >> Angelo, >> >>>>rig it does have a few quirks. >> >> There was no need to bury him with details. >> >> Alan >> WA4SCA >> >> >> -----Original Message----- >> From: amsat-bb-bounces(a)amsat.org [mailto:[email protected]] On >> Behalf Of Angelo Glorioso >> Sent: Friday, August 02, 2013 7:34 AM >> To: amsat-bb(a)amsat.org >> Subject: [amsat-bb] Re: Newbie needs advice on which transceiver to get >> >> Hi Oscar and Alan, >> >> Please be aware of the birdie right on the downlink of SO50. This is an >> internal birdie. I think it is very important to pass this on. It will >> affect AO27 also if it comes back to life or any >> satellite that uses 436.800 as a downlink. >> >> >> 73 de Angelo >> >> >> ----- Original Message ----- >> From: "Alan" <wa4sca(a)gmail.com> >> To: "'Oscar Ortega'" <oscaro(a)mindspring.com>; <amsat-bb(a)amsat.org> >> Sent: Friday, August 02, 2013 7:07 AM >> Subject: [amsat-bb] Re: Newbie needs advice on which transceiver to get >> >> >>> Hi Oscar, >>> >>> Call? >>> >>> Any of those should work fine, and you should include the Kenwood >>> TS-2000 >>> in your search list. It is >>> still in production, and well thought of, though like nearly every other >>> rig it does have a few >>> quirks. >>> >>> The FT-847 is still a great rig, and is usually snapped up whenever a >>> good >>> used one becomes available. >>> The first batch had "write only" CAT control, with all of the following >>> ones having bidirectional >>> capability which is needed for modern control programs such as SatPC32. >>> Many of the first ones where >>> modified, but if you consider one, make certain it has the update. >>> >>> Note that you can use two regular rigs together to form a satellite >>> station. Some people find a good >>> eBay or flea market rig as a second unit. Again, programs like SatPC32 >>> will work with this >>> combination and make it look like a single rig. For instance, our >>> Dayton >>> Hamvention demo station uses >>> two FT-817s. >>> >>> 73s, >>> >>> Alan >>> WA4SCA >>> >>> >>> >>> >>> -----Original Message----- >>> From: amsat-bb-bounces(a)amsat.org [mailto:[email protected]] On >>> Behalf Of Oscar Ortega >>> Sent: Thursday, August 01, 2013 6:52 PM >>> To: amsat-bb(a)amsat.org >>> Subject: [amsat-bb] Newbie needs advice on which transceiver to get >>> >>> Hi, >>> >>> I recently got interested in trying satellite communications. I bought >>> an >>> Arrow antenna and I am >>> wondering >>> which transceiver to get. So far I have found the FT-847, IC-910h and >>> IC-9100. >>> >>> The FT-847 scares me since it is a bit old, however I have heard it is >>> very good for satellite and >>> EME. >>> >>> Any advice would be appreciated!! >>> >>> Regards, >>> Oscar >>> _______________________________________________ >>> 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 >>> >>> _______________________________________________ >>> 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 >>> >> >> _______________________________________________ >> 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 >> >> >

6 6

Newbie needs advice on which transceiver to get
by Oscar Ortega 02 Aug '13

02 Aug '13

Hi, I recently got interested in trying satellite communications. I bought an Arrow antenna and I am wondering which transceiver to get. So far I have found the FT-847, IC-910h and IC-9100. The FT-847 scares me since it is a bit old, however I have heard it is very good for satellite and EME. Any advice would be appreciated!! Regards, Oscar

5 4

Re: Newbie needs advice
by Michael Farkas 02 Aug '13

02 Aug '13

Depends on what you plan on doing and how much money you want to spend. I would suggest for portable operations getting a new or used name brand dual band ht like the Yaesu VX-7R or maybe a VX-8R. Check the suppliers for close outs and specials. I got my Yaesu VX-7R at real deal because they were clearing them out for the newer model VX-8 something because they actually came out with two new variants of the model. Keep in mind they work four bands. I'm starting to hear some bad things about the new "cheap" models that are out that as with I suggested staying Icom, Kenwood, Yaesu etc. I run both Elk and Arrow antennas.For base operations do the same but look for reviews on the different rigs. There are a ton of different ways to setup a home station. My rule of thumb when shopping is doing what your doing now then check the suppliers for deals, then look for used e-bay is a good source along with Hamfests!73,sMike/N8GBU

1 0

(no subject)
by nick pugh 02 Aug '13

02 Aug '13

HI All who want to go to HEO Please watch video below it is a 3 minute video. If this resonates please pass it on and comment on the list 73 nick http://www.youtube.com/watch?v=9DIxnO3CGrY Thanks nick ARS K5QXJ EM30xa 30.1N 92.1W Office 337 593 8700 Cell 337 258 2527 Helping UL become a world Class Engineering and Educational School

1 0

ISS Ham-tv
by Robert C. Campbell 02 Aug '13

02 Aug '13

I got my TechnoTrend S2-1600 the other day and tried to get it to work on a Windows XP and a Windows 7 machine. Both machines are presently out of commission because of driver issues and an array of error codes. Seems all is not as simple as plug and play with these little monsters. I don't think I will ship it back to Europe for some other victim got get his hands on. Destruction with a 5 lb. hammer seems most likely. Anyone with a recommendation for another product that has good drivers packaged with it along with good vendor support would be welcome to contact me off line at the above address. Thanks in advance. Bob KB3PMR

3 2

D Star net
by damon runion 01 Aug '13

01 Aug '13

D Star Amsat users net tonight at 01;00 UTC on REF 60 B Hope to see you there with news about grid trips new operators and things you may want to sell or buy Damon WA4HFN em55 Memphis, TN

2 1

Re: V/U Linear Transponder
by Tanan Rangseeprom HS1JAN 01 Aug '13

01 Aug '13

Dear All Thanks respond for help to me 1.Thailand has regular to forbid for transmitt UHF band but can receive the signal for amateur radio satellites only. we need to used VHF band same like transponder of Japanes (FO-29) , AmSat AO-51 , Saudiarabia SO-50 and other satellites. for interference from China Thailand and other countries on VHF is normal. 2.Ok, I do not have knowledge 100 khz bandwidth is too much for the over power. please advice me for 30 khz uplink 145.90-145.92 MHz VHF / 435.10 - 435.12 MHz UHF of liner transponder. 3.We have to design FM repeater use to modify HX1 / RX2A RADIOMETRIX VHF / UHF transmitter module we have change x-tal to 145.90 MHz / 13.59 MHz and used MC3361 with x-tal 10.245 MHz and CML IC FX465 CTCSS Encode/Decode build test it to be successful. We and technical team of TAMSAT group would like to help and advice for circuit diagram of V/U transponder same like transponder of Japanes (FO-29) and other satellites. We had mail to Mr.William Leijenaar PE1RAH but do not have respond feedback. Mrs Thida of 100watts ham radio magazine of thailand sugges me to know Mr.William.because she meet him on Tokyo ham fair 2009. On this time we and technical team of TAMSAT group need help very urgent. we need advice of circuit diagram or datasheet IC for build V/U Liner transponder for payload 1U cubesat of JAISAT satellite project. best regards Tanan Rangseeprom HS1JAN Project Manager of JAISAT-1 member of RAST email : hs1jan(a)tamsat.org ----- Original Message ----- From: <g0mrf(a)aol.com> To: <hs1jan(a)tamsat.org> Sent: Monday, July 29, 2013 5:24 PM Subject: Re: [amsat-bb] V/U Linear Transponder Dear Tanan. Thanks for the mail via AMSAT.org My name is David Bowman G0MRF and I'm a member of the team building FUNcube, due for launch this November. I can help with transponder design, but there are some points which you need to consider. 1) The use of V band for the uplink will be a poor choice for your location. The interference from China and other countries on 145MHz will mean the transponder will not be usable. Using U band for the uplink is a much better choice. 2) The 100kHz bandwidth is too much for the typical power available from a CubeSat. If you get your RF team to do a link budget analysis, you will see the cubesat power budget will not support 100kHz of bandwidth. Ususally 30kHz is as much as you can do with a 1U cube. 3) You may want to consider a FM 'repeater' as there is now only 1 in orbit, while there are several linear transponder satellites ready to be launched. The FM design will allow you to run a very efficient power amplifier (70%) and power can be saved over oceans and areas of low population by using a 67Hz access tone (CML FX465) I can assist with design but would need to know if you are planning a 1U 2U or 3U design. William PE???? is good, but will probably just offer to sell you a transponder. Regards David G0MRF some old info is available at www.g0mrf.com/transponder.htm The attached powerpoint has some pictures of the UV transponder and other boards in FUNcube from AMSAT-UK

2 1

Alpha Spid Big-RAS AZ & EL Rotator
by Sion Chow Q. C. (9W2QC) 01 Aug '13

01 Aug '13

Dear All, I understand that the Alpha Spid Big-RAS AZ & EL Rotator requires 4 control cables each for it Azimuth and Elevation control. However, I am not able to find out if the connector on the outdoor rotator end consist of 2 separate connectors for the AZ and EL motor (like the Yaesu G-5500) or if they are connected all together at one point. Also would be great if someone could advice if the connection point consists of screw on terminals or some kind of connector plug is used. This is in preparation of ISS HAM TV reception and would like to understand the above before deciding if I should purchase this rotor. Thank you. 73, Sion Chow Q. C., 9M2CQC, WQ2C

2 2

Jump to page:

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

AMSAT-BB August 2013