Re: [amsat-bb] Trakbox pricing ?
Are you talking about the TAPR/JAMSAT TrakBox? I bought a nice one a couple years ago for about $200 USD shipped from Canada. I found a turbo kit available from someone here on AMSAT to speed up the CPU and installed it. The turbo kit if still available is a bargain, new CPU, Y2K firmware, a faster crystal and another faster chip. Apart from soldering the crystal, there is not much to do but follow instructions. I also plan to install a back-lighted LCD display to be easy on my eyes. They work pretty well. The only drawback is the RS232 interface for the KEPS. I am going to try and add an Ethernet to RS232 adapter so I can use a browser to upload the KEPS. What I like is that it has real time tracking, _doppler __correction _and autonomous operation in one package. I don't think there is anything on the market that has everything these have. Assuming the lithium battery has not leaked and the kit is well constructed, you should be able to recoup your investment. They are no longer available. Joe K4SAT Hi Gang I'll be selling a Trakbox soon; would be grateful for advice on what price to ask (in UK money). Original price AFAIRC 100-150 UK pounds. For those who don't know this item, its an az/el rotator controller. Feed it keplers on the RS232 input occasionally and it'll track both rotators at the right time. 73 Richard G3 -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: G5400B calibration problems
Tim; I believe there are two pots each for the azimuth and elevation meter adjustments. One pair are for the internal meters, the other pair for 0-5V to be used by the TrakBox (or similar) ADC. Make sure you turned the correct pair. However first I would make sure the internal 7806 voltage regulator is producing 6 volts and does not oscillate or have noise on it. Dig out a DVM and scope to make sure. Those regulators, if not properly bypassed with a capacitor may oscillate. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] crude receiver
You could. My concerns would be: 1) Noise figure. You will need a low noise amplifier with sufficient gain to overcome the mixer loss. 2) How will you stabilize the frequency of the YIG? You may have better luck with one of the more easily attainable crystal controlled Brick oscillators. Hi all! Could I build a microwave receiver for satellite using a yig, mixer, the appropriate Local oscillator and an SDR dongle for receive of some kind? I do have an IF filter and so forth. Norm n3ykf -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: DTMF on HF?
Since DTMF has two tones for each number, it would seem possible that you could have some DSP detect the difference frequency of each pair and then either adjust its decoders or QSY the receiver's VCO to get a lock. There are a ton of small development boards like Raspberry PI that have hardware that might be able to do this. Has anybody got the AMSAT-bb daily digest to work through their e-mail provider other than Gmail? -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: DTMF on HF?
The software could first solve for one pair of tones then another, then add or subtract the offset and choose the pair that has the correct fundamental tones. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Fwd: Re: Re: DTMF on HF?
True, But fixing on the receive end would be more spectrum efficient. And you need to autotune the suppressed carrier anyway requiring receiver side complexity, so why not give DSP a challenge to do it in the blind? With DSP so readily available, I am surprised doppler correction of voice has not been explored. On 1/11/2014 12:05 AM, kc6...@cox.net wrote: Joe, A -16dB pilot carrier would solve the frequency offset problem. This was a common solution for Marine shore stations in the last century. Art, KC6UQH -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Joe Leikhim Sent: Friday, January 10, 2014 2:31 PM To: amsat-bb@AMSAT.Org Subject: [amsat-bb] Re: DTMF on HF? Since DTMF has two tones for each number, it would seem possible that you could have some DSP detect the difference frequency of each pair and then either adjust its decoders or QSY the receiver's VCO to get a lock. There are a ton of small development boards like Raspberry PI that have hardware that might be able to do this. Has anybody got the AMSAT-bb daily digest to work through their e-mail provider other than Gmail? -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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 -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: Confirm Message (Moderator please help??)
Bruce; I sent a message to paul, but no answer. Not even sure any messages from amsat.org are getting to me at all. On 12/16/2013 5:45 PM, Bruce wrote: might you deal with the administrator, paul, kb5mu. i am sure talking with him might be more fruitful than a lot of messages back and forth on the amsat-bb. i am sure all it takes is one spam message sent to the bb and the domain will be caught and treated as a spam site. 73...bruce Sent from Yahoo Mail for iPhone http://overview.mail.yahoo.com?.src=iOS *From: * Joe Leikhim rhyol...@leikhim.com; *To: * apbid...@mailaps.org; amsat-bb@amsat.org; *Subject: * [amsat-bb] Re: Confirm Message (Moderator please help??) *Sent: * Mon, Dec 16, 2013 9:44:17 PM I am still not receiving daily digests since Nov 26. Apparently SPAMCOP has blacklisted it repeatedly. Who is the adminstrator for AMSAT.ORG? - www.amsat.org Whois: ISP University of California, San Diego 169.228.66.5 listed in bl.spamcop.net (127.0.0.2) If there are no reports of ongoing objectionable email from this system it will be delisted automatically in approximately 23 hours. Causes of listing * System has sent mail to SpamCop spam traps in the past week (spam traps are secret, no reports or evidence are provided by SpamCop) * SpamCop users have reported system as a source of spam less than 10 times in the past week Additional potential problems (these factors do not directly result in spamcop listing) * Too many delisting requests were made. Next request might be allowed after 5.0 days Because of the above problems, express-delisting is not available Listing History In the past 20.1 days, it has been listed 6 times for a total of 18.4 days Dispute Listing If you are the administrator of this system and you are sure this listing is erroneous, you may request that we review the listing. Because everyone wants to dispute their listing, regardless of merit, we reserve the right to ignore meritless disputes. Dispute listing of 169.228.66.5 http://www.spamcop.net/w3m?action=dispute;ip=169.228.66.5 - On 12/15/2013 6:42 AM, Alan wrote: Joe, This is a problem which has been around for some time, and is getting worse. Small ISPs, and some larger ones, use spam control programs such as Spam Cop and Iron Key. They have various ways of detecting spam sources, and these are blocked at the ISP level, so you never see the messages sent to you. Unfortunately they block entire domains, such as AMSAT.ORG, usually for 24 hours unless the block is reset. If your ISP is blocked, you have about a 50-50 chance of getting a bounce message when you send a message. I have to get my internet from a small rural phone company, and eventually had to give up on using their email. Their domain was frequently blocked, so I never knew whether email would go through. When I found out about a problem, I could contact their tech people who were good about fixing it, but the same thing might happen the next day. I finally moved to Gmail, which is so huge no one would dare block them, and they have resources to handle incoming spam. 73s, Alan WA4SCA -Original Message- From: amsat-bb-boun...@amsat.org javascript:return [mailto:amsat-bb-boun...@amsat.org javascript:return] On Behalf Of Joe Leikhim Sent: Saturday, December 14, 2013 8:01 PM To: amsat-bb@amsat.org javascript:return Subject: [amsat-bb] Confirm Message (Moderator please help??) I just got the following message from AMSAT-BB implying a problem sending the digest to my e-mail account. Can anyone tell me if I am alone with this problem? I had another person complain of bounces to my account. I really want to fix this if I can. My ISP Inmotionhosting claims that dome other e-mail servers are blocked globally due to spam. I have no idea how to fix this. I had to resubscribe to the BB. Your membership in the mailing list AMSAT-BB has been disabled due to excessive bounces The last bounce received from you was dated 30-Nov-2013. You will not get any more messages from this list until you re-enable your membership. You will receive 1 more reminders like this before your membership in the list is deleted. To re-enable your membership, you can simply respond to this message (leaving the Subject: line intact), or visit the confirmation page at -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com javascript:return 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@amsat.org javascript:return. 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 -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik
[amsat-bb] Re: Confirm Message (Moderator please help??)
I am still not receiving daily digests since Nov 26. Apparently SPAMCOP has blacklisted it repeatedly. Who is the adminstrator for AMSAT.ORG? - www.amsat.org Whois: ISP University of California, San Diego 169.228.66.5 listed in bl.spamcop.net (127.0.0.2) If there are no reports of ongoing objectionable email from this system it will be delisted automatically in approximately 23 hours. Causes of listing * System has sent mail to SpamCop spam traps in the past week (spam traps are secret, no reports or evidence are provided by SpamCop) * SpamCop users have reported system as a source of spam less than 10 times in the past week Additional potential problems (these factors do not directly result in spamcop listing) * Too many delisting requests were made. Next request might be allowed after 5.0 days Because of the above problems, express-delisting is not available Listing History In the past 20.1 days, it has been listed 6 times for a total of 18.4 days Dispute Listing If you are the administrator of this system and you are sure this listing is erroneous, you may request that we review the listing. Because everyone wants to dispute their listing, regardless of merit, we reserve the right to ignore meritless disputes. Dispute listing of 169.228.66.5 http://www.spamcop.net/w3m?action=dispute;ip=169.228.66.5 - On 12/15/2013 6:42 AM, Alan wrote: Joe, This is a problem which has been around for some time, and is getting worse. Small ISPs, and some larger ones, use spam control programs such as Spam Cop and Iron Key. They have various ways of detecting spam sources, and these are blocked at the ISP level, so you never see the messages sent to you. Unfortunately they block entire domains, such as AMSAT.ORG, usually for 24 hours unless the block is reset. If your ISP is blocked, you have about a 50-50 chance of getting a bounce message when you send a message. I have to get my internet from a small rural phone company, and eventually had to give up on using their email. Their domain was frequently blocked, so I never knew whether email would go through. When I found out about a problem, I could contact their tech people who were good about fixing it, but the same thing might happen the next day. I finally moved to Gmail, which is so huge no one would dare block them, and they have resources to handle incoming spam. 73s, Alan WA4SCA -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Joe Leikhim Sent: Saturday, December 14, 2013 8:01 PM To: amsat-bb@amsat.org Subject: [amsat-bb] Confirm Message (Moderator please help??) I just got the following message from AMSAT-BB implying a problem sending the digest to my e-mail account. Can anyone tell me if I am alone with this problem? I had another person complain of bounces to my account. I really want to fix this if I can. My ISP Inmotionhosting claims that dome other e-mail servers are blocked globally due to spam. I have no idea how to fix this. I had to resubscribe to the BB. Your membership in the mailing list AMSAT-BB has been disabled due to excessive bounces The last bounce received from you was dated 30-Nov-2013. You will not get any more messages from this list until you re-enable your membership. You will receive 1 more reminders like this before your membership in the list is deleted. To re-enable your membership, you can simply respond to this message (leaving the Subject: line intact), or visit the confirmation page at -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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 -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Confirm Message (Moderator please help??)
I just got the following message from AMSAT-BB implying a problem sending the digest to my e-mail account. Can anyone tell me if I am alone with this problem? I had another person complain of bounces to my account. I really want to fix this if I can. My ISP Inmotionhosting claims that dome other e-mail servers are blocked globally due to spam. I have no idea how to fix this. I had to resubscribe to the BB. Your membership in the mailing list AMSAT-BB has been disabled due to excessive bounces The last bounce received from you was dated 30-Nov-2013. You will not get any more messages from this list until you re-enable your membership. You will receive 1 more reminders like this before your membership in the list is deleted. To re-enable your membership, you can simply respond to this message (leaving the Subject: line intact), or visit the confirmation page at -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: ICOM IC-PCR-1000
Brock; I bought one of these receivers a year ago to use for LMR signal strength measurements. It is a very versatile receiver multimode receiver, It is NOT SDR however, so extracting some digital modes may require a discriminator tap which is well documented on various sites. As was pointed out, the lack of a serial port on the host computer will require a USB to serial dongle-thingy. The biggest complaint by users is support of USB. That being said, I got mine working, so if you have any trouble I will give it a shot. Hope my memory serves. I did however download a whole lot of software and info. I would recommend avoiding the BONITO software that was often bundled with it. Mine just plain did not like their product and acted in very funny ways. I got worse than no support, very cryptic people to ask for help. Try the ICOM software to get it going and then branch out. Beware of any utilities to back up, retune or modify the firmware. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: My Take
Has there been any though about a mailing to some of these thousands of past AMSAT alumni who are not SK, to try to get them interested in rejoining and contributing to future projects? No doubt a few are still active on the sats, others may be interested in future endeavors. This might take some work finding correct addresses. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: So Long
Along the same thinking, sequentially launched flotillas of MEO cubesats with identical linear transponders, each with GPS derived local oscillator. If done correctly, antennas phased alike, the power from two or more would be additive and the uplinks would provide diversity. Like Project Westford Needles dipole experiment, but having system gain. -- Message: 4 Date: Wed, 18 Sep 2013 11:42:32 -0500 From: Tom J. Gentry t.gen...@verizon.net To: amsat-bb@amsat.org amsat-bb@amsat.org Subject: [amsat-bb] Re: So Long Message-ID: 769da5e9-2900-4d29-86fb-c55eadd22...@verizon.net Content-Type: text/plain; charset=us-ascii While the frustration evidenced in this digest is understandable, perhaps unknown to us AMSAT are already trying to innovate an alternative to Highly Elliptical Orbit. Certainly a longer lived orbit would be desirable and a bird lighter that a P3 sat would perhaps find a cheap ride easier but let us rethink our path to get to where we want to be. As sure as E=mc^2, Upmass=$$$. Even though we started out as hitch hikers to the galaxy, AMSAT has acquired a significant data base of communications technology that we will be able to use to get more rides as soon as ITAR gets lifted off our neck and we can find more programs that can use the AMSAT communications expertise. How about a series of cube sats that are placed high enough (or could be raised to that orbit) to last for awhile? How about we use other people's bird's after they are through with their experiments and move them up to longer lasting orbits and reconfigure the comm system (the one we built for them) to an amateur radio configuration. If each one of these MEO cube sats lasts long enough to overlap, pretty soon you have a constellation. I probably will not live to see it complete but that is no reason not to start. The key is to get long lasting orbits with small sats and lots of them. Sent from my iPad -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: High orbit satellites?
Fabiano, You beat me to it! This would be a great idea. The important part would be in the execution. First identify a launch opportunity, satellite and budget that is real BEFORE launching a kickstarter. A review of some of the failed Kickstarter schemes would be important lesson. When AO40 launched, I was amazed just to be able to receive the 2M engineering beacon with a Standard C508 portable sitting on my dashboard WHILE driving! One of the incentives could be an inexpensive SDR kit designed specifically to receive and decode telemetry, SSTV images and other data. This could get the masses interested in the hobby. For bragging rights, contributors at a higher level would get a Vanity QSL card or similar vanity image item (for the unlicensed) stored in the bird and randomly displayed on SSTV or HDTV that could be decoded with the SDR kit. Make the SDR receiver kit portable and IOS and/or Android compatible and you have captured the younger demographic. Maybe some of the radio manufacturers could throw in gear as incentives for larger donations. To mis-quote Frank Zappa, AMSAT is not dead, it just smells bad. Message: 5 Date: Thu, 29 Aug 2013 18:41:44 +0100 From: Fabiano Moserfabianomo...@gmail.com Cc: amsat-bbamsat-bb@amsat.org Subject: [amsat-bb] Re: High orbit satellites? Message-ID: CAM6o-maX=9KaU6mjALYxUtjk_BMNp=+x5M0fvfZ=q2jetuk...@mail.gmail.com Content-Type: text/plain; charset=ISO-8859-1 How manny Amateur Radio whole world can join this Challenge? What about: http://www.kickstarter.com ??? -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Item of interest IC-970H with 2.4 and 1.2 GHz modules
I have no interest in this auction other than to bring it to attention of the group. http://www.ebay.com/itm/ICOM-IC-970H-VHF-UHF-ALL-MODE-TRANSCEIVER-/181152115852?pt=US_Ham_Radio_Transceivershash=item2a2d81ec8c -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: Path to HEO
Thinking way outside the box, what about some sort of phased array using dipoles, which has the boresight synthesized to point at earth. In other words, don't use fuel to reorient the bird, electronically steer the phase of the antennas so that earth is in focus. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: Path to HEO
Even if the technique required 5 years to advance to HEO it would be a positive step since the amateur launch opportunities directly to HEO are measured in decades and the cost in 10's millions of dollars. This reminds me of a commercial payload that failed to make GEO. The folks at AGI (STK Satellite Toolkit) devised a path circling the moon which used the lunar gravity to accelerate and return the satellite to its intended GEO position without depleting much of its limited station keeping fuel. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: Path to HEO
Ditto; here, sounds like an promising direction. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] UCF to launch $55 million satellite
http://www.orlandosentinel.com/features/education/os-ucf-nasa-55-million-grant-20130412,0,533426.story -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: Foxdelta ST-2 / LVB Tracker
Does the controller have motor protection logic/timers to detect if the motor is stalled? This sounds like normal behavior I discovered with the TAPR TakBox. There is a timer that detects if the ADC disagrees with where the controller thinks the rotor should be pointed and stops the motor. It takes a number of seconds (in the timer) to reset the controller. What I found was that the ADC always lagged where the controller thought the antenna should be pointed. The timer had to be long enough to allow the rotor to catch up. The trouble is, no matter what software I use, or even if I manually issue pointing commands via serial terminal, the ST2 will stop my rotator too early, resulting in offpointing by about 20 degrees. I am using the same voltage divider that I used on my KCT, so the ST2 is seeing a 0-5v reading from the azimuth rotor POT. The LCD display matches the analog display within a degree, so the ST2 knows correctly where the azimuth rotator is aimed. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: Update On Dragon Malfunction
FRIDAY, MARCH 1, 2013 1959 GMT (2:59 p.m. EST) SpaceX founder and CEO's just tweeted: Pods 1 and 4 now online and thrusters engaged. Dragon transitioned from free drift to active control. Yes!! -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: phased array
Actually there has been a lot of work on steerable arrays on the lower frequency bands. Here is one notable example: http://www.google.com/url?sa=trct=jq=esrc=ssource=webcd=2ved=0CDcQFjABurl=http%3A%2F%2Fwww.k1lt.com%2FQEX%2520Beam%2520Steering%2520on%2520160.pdfei=kuQrUbSeOYWc9QSiyoG4AQusg=AFQjCNEj96TEqHxWeBEw064CNmkvmUvC8wbvm=bv.42768644,d.eWUcad=rja -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: Rotation of NIWAKA
It may be symmetrical, however the LED array is projecting photons from one plane. Could the photonic energy be a sufficient force? From website: I have no idea on the reason. Let me know if you have any idea. NIWAKA do not have any mechanism like Crookes radiometer. Its structure is almost symmetry around Z-axis. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: NIST Phase Noise Measurements Group Noise
Domenico; Your argument certainly makes sense. I think NIST may need to be challenged on the assertion. Perhaps their report is out of context? -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: NIST Phase Noise Measurements Group Noise Figure
I have just sent off an e-mail to David Howe of NIST Metrology requesting clarification. I was shocked when I first saw this and posted it a couple places to get feedback. Domenico's excellent response further demonstrated that explanation is required. I will post NIST's response when I get it. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] NIST Phase Noise Measurements Group Noise Figure kTB correction
This came to my attention yesterday. NIST presents interesting 3 dB correction to historic value assumed for kTB to -177 dBm/Hz . I always assumed -174 dBm/Hz based on past publications. http://tf.nist.gov/phase/noisemeas.html I wonder how this affects metrology and calibration of noise figure meters? -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: YouTube
Cute! On 1/17/2013 4:15 PM, Mauri Lucca wrote: www.youtube.com/watch?v=ZAxUb6EPPtY http://www.youtube.com/watch?v=ZAxUb6EPPtY iz5ovp maurilu...@tiscali.it mailto:maurilu...@tiscali.it sent by mobile phone www.qrz.com/db/iz5ovp http://www.qrz.com/db/iz5ovp -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Ham Radio in UK?
I am planning a trip to UK and was wondering about VHF repeater usage. 1) I have an ICOM W32A and it does not generate 1750 Hz tone as far as I can tell (US Version). Is CTCSS widely used in OK? 2) The radio is dual band 2M/70CM but I can disable 70CM band from front panel. Will Customs hassle me for that model? 3) Any recommendations for good PMR446, dPMR or similar radios (low cost) to communicate with my wife should we get separated? Preferably something readily available and using AA (not AAA) batteries. 4) Is GSM still the way to go for basic cell phone service in UK? We got my son a used blackberry world phone for his trip last year and it seemed spotty. Maybe he was getting SIM cards for the wrong provider? Thanks in advance -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: Ham Radio in UK?
Thanks; For some reason, I thought 70CM Repeaters were unavailable in UK, and my W32A might be contraband. Yes the W32A can work 420-450 MHz, (Mine will :-) ). Yes voice GSM is what we need for the trip. WIFI will have to suffice for data needs. --- On Fri, 11/1/13, Joe Leikhim rhyol...@nettally.com wrote: I am planning a trip to UK and was wondering about VHF repeater usage. 1) I have an ICOM W32A and it does not generate 1750 Hz tone as far as I can tell (US Version). Is CTCSS widely used in OK? All 2m repeaters use CTCSS, info on repeaters and coverage maps are at http://www.ukrepeater.net/ 2) The radio is dual band 2M/70CM but I can disable 70CM band from front panel. Will Customs hassle me for that model? Don't know but I've not heard of anyone having problems. BTW can't you open up the 70cm coverage to give 420-450 MHz ? That would enable you to use the UK 70cm repeaters. 3) Any recommendations for good PMR446, dPMR or similar radios (low cost) to communicate with my wife should we get separated? Preferably something readily available and using AA (not AAA) batteries. 4) Is GSM still the way to go for basic cell phone service in UK? We got my son a used blackberry? world phone for his trip last year and it seemed spotty. Maybe he was getting SIM cards for the wrong provider? If all you want is voice and SMS text messaging then yes GSM is what you are after. For data/internet use you'd need 3G. It's worth checking the coverage provided by each of the Four networks in the areas you'll be visiting before you buy a Sim. Personally I've found Vodafone and O2 give best voice/text coverage as they use the 900 MHz band, other networks EE (Orange/T-Mobile) and 3 are only on the higher bands, 1800 and 2100 MHz with shorter ranges. Coverage Maps: Vod -http://www.vodafone.co.uk/our-network-and-coverage/uk-coverage-map/ O2 -http://www.o2.co.uk/coveragechecker EE -https://explore.ee.co.uk/coverage-checker 3 -http://www.three.co.uk/Support/Coverage 73 Trevor M5AKA -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: North Korea
Gentleman, gentleman, - No fighting in the WAR ROOM! (snip) Uh oh...activate 'Dr. Strangelove Protocol'watch for large man, 'white sidewalls' haircut, cheap black suit astride large missile...subject will be waving large cowboy hat, screaming 'Yee Hah' in Korean... That is all K7TRK out -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: North Korea
best movie ever! On 12/13/2012 6:38 PM, Ted wrote: Survival kit contents check. In them you'll find: one forty-five caliber automatic; two boxes of ammunition; four days' concentrated emergency rations; one drug issue containing antibiotics, morphine, vitamin pills, pep pills, sleeping pills, tranquilizer pills; one miniature combination Russian phrase book and Bible; one hundred dollars in rubles; one hundred dollars in gold; nine packs of chewing gum; one issue of prophylactics; three lipsticks; three pair of nylon stockings. Shoot, a fella' could have a pretty good weekend in Vegas with all that stuff. -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Joe Leikhim Sent: Thursday, December 13, 2012 3:17 PM To: amsat-bb@amsat.org Subject: [amsat-bb] Re: North Korea Gentleman, gentleman, - No fighting in the WAR ROOM! (snip) Uh oh...activate 'Dr. Strangelove Protocol'watch for large man, 'white sidewalls' haircut, cheap black suit astride large missile...subject will be waving large cowboy hat, screaming 'Yee Hah' in Korean... That is all K7TRK out -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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 -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: was NK but now Dr. Strangelove
You are going to answer to the coca cola company! http://www.youtube.com/watch?v=ry2n4v9G4_k On 12/13/2012 9:53 PM, R Oler wrote: Shoot, a fella' could have a pretty good weekend in Vegas with all that stuff. There actually is a couple of prints of that movie out, which I have a DVD of where the original line is there Shoot, a fella could have a pretty good weekend in Dallas with all that stuff...the movie was set to come out two weeks after JFK was assasinated and they changed the line to Vegas. Pickens (Major Kong) was from Abilene and all the lines in it are more or less ad libbed there was a script by PIckens just pulled the part well...and the Dallas line was his, as was the call to change it. A superb movie What is the meaning of this, you know you cannot fight in the war room (or something like that) Robert WB5MZO Date: Thu, 13 Dec 2012 19:16:12 -0500 From: rhyol...@nettally.com To: k7trkra...@charter.net CC: amsat-bb@amsat.org Subject: [amsat-bb] Re: North Korea best movie ever! On 12/13/2012 6:38 PM, Ted wrote: Survival kit contents check. In them you'll find: one forty-five caliber automatic; two boxes of ammunition; four days' concentrated emergency rations; one drug issue containing antibiotics, morphine, vitamin pills, pep pills, sleeping pills, tranquilizer pills; one miniature combination Russian phrase book and Bible; one hundred dollars in rubles; one hundred dollars in gold; nine packs of chewing gum; one issue of prophylactics; three lipsticks; three pair of nylon stockings. Shoot, a fella' could have a pretty good weekend in Vegas with all that stuff. -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Joe Leikhim Sent: Thursday, December 13, 2012 3:17 PM To: amsat-bb@amsat.org Subject: [amsat-bb] Re: North Korea Gentleman, gentleman, - No fighting in the WAR ROOM! (snip) Uh oh...activate 'Dr. Strangelove Protocol'watch for large man, 'white sidewalls' haircut, cheap black suit astride large missile...subject will be waving large cowboy hat, screaming 'Yee Hah' in Korean... That is all K7TRK out -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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 -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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 -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: az-rotor
Al; Did you try the method in the manual first to set the rotor up? I followed the manual and it worked fine. Subject: [amsat-bb] Re: az-rotor Message-ID: ABBEFC4E69E44BE4894A1C23DA4B0F8C@AlPC Content-Type: text/plain; charset=iso-8859-1 Hi Erich et al., Following suggestion I did the following. Since the rotor goes beyond 180 on the right side of its travel I let it go until it stopped. I then visually noted how much beyond 180 it had gone, divided by 2 and brought the dial back to 360 plus the number just obtained. I then assumed the pot was at its halfway position. I made the following resistance measurements 1-2 was 209.7 ohms, 2-3 was 206.1 ohms, and 1-3 was 415 ohms. Considering the manual guess work I think that is a pretty good result. I then ran SatPC32 and attempted to park the rotor at 360. It was off, I had to park it at 341 for the rotor to actually be at 360. This is basically the same result as before when I was just going by the control box readings. I believe the resistance measurements would suggest that there is not a short in the pot (unless it just happened to be around the halfway point). At this point I am not sure what to try next 73 Al W8KHP -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] G5400B Rotor Problem
Al; The rotor turns a bit beyond the 180 degree clockwise mark, so when setting it, you have to observe the position of the AZ rotor bell. This is hard to do if the rotor is on the tower. You may need a helper and some walkie talkies. Start with checking the voltages from the controller box. The regulator Q2 (UA7806C) provides about 6 volts through 15 ohm resistors to screw terminals A1 and E1 on the rear panel. (A2 and E2 return a variable voltage from the rotor pots, while A3 and E3) are ground returns). I measured about +5.9 volts at A1 and E1 on mine. Last month I was discussing a stability problem with Tom K4TB who advised me that he found the regulator Q2 would oscillate and the output capacitor C9 (0.01) ineffective, so he added a capacitor directly to the output and fixed his. The original Thompson datasheet for that device claims no output capacitor is required, though a National Semiconductor version of that regulator recommends a .22 uf cap at the input and a 0.1 uf cap at the output to help transient response. Common wisdom has been that these devices may oscillate. I have seen some fluctuation in meter reading on mine at low end of scale. I am in process of system testing my rotor and a TAPR TrakBox on the bench, so I recently set the voltages up to correctly display the azimuth and elevation. There are two pots on the corners of the rear panel which set the meter full scale accuracy these are VR1 and VR2. After adjusting these per the manual, page 4; Pre-Installation Adjustments. After confirming the meters track the rotor position faithfully, there are a second inner pair of pots VR3 and VR4 which set the full scale (AZ and EL needle to full right mark 180 degrees)voltage at the DIN connector which is normally used to feed an ADC inside an external tracking interface like the TracBox or Kansas City Tracker, etc. I set mine to accomodate the ADC voltage range of the TAPR TrakBox, normally 5.0 volts at full scale. Set to this voltage even if you don't have automation, so if you automate later, you save from the headache if the voltage is way too high or low. These outputs should track 0-5V as you go from left to right on the meters. If you are going to adjust these 4 pots, you might want to splash some volume control cleaner at them so they track smoothly. Date: Sun, 25 Nov 2012 13:31:29 -0500 From:tok...@myranch.com To:amsat-bb@amsat.org Subject: [amsat-bb] G5400B Rotor Problem Message-ID: 4C58B102B2AC45A7AD70C87ED4F77C10@AlPC Content-Type: text/plain; charset=UTF-8 Hi all, Trying to get a G5400B rotor going but having some calibration problems with the azimuth settings. With power off and the rotor set at the left hand position, I adjust the needle to read 180. When the power is turned on the reading goes to about 182. I then let the rotor go all the way to the right 180 mark and adjust the full scale pot to read 180. The problem is when the rotor is half way around and should be reading 360 it actually reads 345. Any ideas on what I should be looking at? Also there is nothing in the manual to suggest what the ?out voltage adjust? pot is supposed to do. What is its function? Thank you for any advice. 73 Al W8KHP -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: IRC's to be discontinued
The last time I bought some IRC's I was surprised to find later that they had an expiration date. So I lost money on them. I would NOT be stocking up on these unless you really expect to use them up. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: Montagues Capulets (was: FM vs SSB, HEO vs LEO, etc)
Huh? I certainly got a lot of use out of my V/U station (IC-970) between QSO's on AO-10 and AO-13. I worked extensive 2M SSB DX as well as FM DX and repeaters. On Oct 21 2012, R Oler wrote: The gear for the linear birds is not all that much more expensive then FM equipment. BUT if you dont use it for the birds and dont have really good antenna arrays it is more or less not of a lot of use. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___ Sent via AMSAT-BB@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
[amsat-bb] Re: dismantling satellite antennas
I could not agree with you more John. But, I think I am seeing same folks griping from at least 7 years ago. Maybe it is time for an AMSAT members only BB. Message: 2 Date: Sat, 22 Sep 2012 16:00:57 -0500 From: John Spasojevichjohna...@gmail.com To: i8cvsdomenico.i8...@tin.it Cc: AMSAT-BBamsat-bb@amsat.org Subject: [amsat-bb] Re: dismantling satellite antennas Message-ID: CA+qbou757jRYz64H-w_bRm6N+0F+__VM_KT_-03STLCzKO8=o...@mail.gmail.com Content-Type: text/plain; charset=ISO-8859-1 Then I guess we won't have to read any more complaining e-mail anymore John, AG9D -- Joe Leikhim K4SAT ___ Sent via AMSAT-BB@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
[amsat-bb] Trakbox Host Mode
I have a Trakbox that I am pressing into service. I recently installed Don, AI6RE's turbo kit (speedup processor, 22 MHz crystal, 350D ROM etc) and it is working fantastic. I am also using LOGSAT (with Y2K and last updates). One thing I had not tried prior to upgrade was the TRAKBOX host mode operation with Logsat. In fact I had not given this interface much thought, planning to use standalone mode. Host mode works from the hyperterminal, but Logsat does not seem to be making itself understood to Trakbox. I am using Portmon and can see Logsat delivering AZ_EL commands in the proper format, and can sometimes see the AOS lamp blinking slightly, however TRAKBOX ignores the commands. It seems I have to use Hyperterminal to command the TRAKBOX into host mode, disconnect terminal then start LOGSAT. LOGSAT does not start host mode on its own, though I see a lot of messages. Can someone enlighten me on how this is all supposed to work? I have read the TRAKBOX documentation, but no aha moment. Thanks, even comments from others using TB host mode with other software is welcomed. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 ___ Sent via AMSAT-BB@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
[amsat-bb] Re: Rac 805
Can anyone help Javier find a Y2k upgrade for a RAC805 tracker? On 6/26/2012 7:08 AM, Javier wrote: Hi Joseph I Ea3vo from Spain In a post of the file of Amsat, I have seen about that you were asking about the eprom of the year 2000 of the tracker Rac805 I am looking for this piece of news eprom to be able to use it, since I have bought it to a friend who does not have it with the new firmware Did you manage to find her??? If you have it might it to order me the file to be able to record it?? Thank you very much in advance and he forgives the inconveniences 73,s Javier Ea3vo Sorry my bad english, thanks -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 ___ Sent via AMSAT-BB@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
[amsat-bb] Washington State Area AMSAT or weak signal Hams
If there are any hams near to the Wenatchee, WA Area (Latitude (deg): 47.55 Longitude (deg): -120.17), who have roaming capabilities (to locate interference), VHF antenna, preamp and multi-mode RX and/or spectrum analyzer, Please contact me off line. Thanks -- Joe Leikhim ___ Sent via AMSAT-BB@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
[amsat-bb] MILSAT Malfunction/Save
Sound familiar? http://news.yahoo.com/delicate-rescue-saves-stranded-1-7b-us-satellite-144826517.html -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 Note to GMail Account users. Due to an abnormally high volume of spam originating from bogus GMail accounts, I have found it necessary to block certain GMail traffic. Please phone me if you believe your message was not received. ___ Sent via AMSAT-BB@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
[amsat-bb] ICOM IC-W32A and RT Systems Software
I am throwing out a shameless plug for this great software. I was at the Orlando Hamcation and eyed their booth and finally bought the software I so have needed to use my W32A properly. Entering anything into the W32A is tedious and a bother, while the software provides a spreadsheet entry mode. I love spreadsheets- really I do! Anyway, I am a bit picky so I found a quirky thing about the software and contacted Karin in support who got it sorted out and made me BETA TESTER! Bottom line, there is an upgrade on line at their website and you can access through the program. So if you already have the newer version with USB interface try it out. Let me know if anything broke, I may be responsible! But I think it is fine. If you have a W32A and don't have this SW you are glutton for punishment! -- Joe Leikhim K4SAT ___ Sent via AMSAT-BB@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
[amsat-bb] Re: Model Rocket Booster Engine for Picosatellite
David; There are some much bigger motors! Ask the Level-3 rocketry folks! Anyway a cluster of medium sized motors could be fired individually as required to raise altitude. I would think that SRB's would be more reliable and safer than hypergolic used on previous Oscars. There would of course be a lot of heat in the rocket casings that would need to be dissipated. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 Note to GMail Account users. Due to an abnormally high volume of spam originating from bogus GMail accounts, I have found it necessary to block certain GMail traffic. Please phone me if you believe your message was not received. ___ Sent via AMSAT-BB@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
[amsat-bb] Re: Model Rocket Booster Engine for Picosatellite
I have developed the perfect solution; A gatling gun type canister for the rocket motors would solve all of your objections per below: On 1/17/2012 4:22 PM, Ken Ernandes wrote: How would attitude be controlled so the thrust is in the correct direction? Spin stabilization about the maximum moment off inertia axis is probably the best choice. This would require a magnetic torquing system. Yes just like other missions. Another issue is the thrust needs to be directed through the spacecraft's center-of-mass or there will be stability problems. How would a cluster be fired individually with each, in turn, directed through the center of mass? That's a complex design problem. A motorized canister with 6 to 8 motors aligned such that the active motor is aligned through the COM. Picture a revolver or gatling gun. One more issue is that when you carry multiple motors, the first must accelerate the mass of the unfired motors, so the early firing will be less effective. The mass of the spent casings will need to be accelerated buy the subsequent motor firings. Spent casings would be ejected using the ejection charge normally used for deploying a parachute. Just as with any fuel, the mass of the unfired fuel will create mass for the initial firings. You do have some work to do before you have a practical solution. Work is done. Took about 4 minutes. Coffee break now! 73, Ken N2WWD Sent from my iPad On Jan 17, 2012, at 3:44 PM, Joe Leikhimrhyol...@nettally.com wrote: David; There are some much bigger motors! Ask the Level-3 rocketry folks! Anyway a cluster of medium sized motors could be fired individually as required to raise altitude. I would think that SRB's would be more reliable and safer than hypergolic used on previous Oscars. There would of course be a lot of heat in the rocket casings that would need to be dissipated. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 Note to GMail Account users. Due to an abnormally high volume of spam originating from bogus GMail accounts, I have found it necessary to block certain GMail traffic. Please phone me if you believe your message was not received. ___ Sent via AMSAT-BB@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 -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 Note to GMail Account users. Due to an abnormally high volume of spam originating from bogus GMail accounts, I have found it necessary to block certain GMail traffic. Please phone me if you believe your message was not received. ___ Sent via AMSAT-BB@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
[amsat-bb] Model Rocket Booster Engine for Picosatellite
Has anyone seen this. I am surprised a shuttle mission permitted this type of booster. From what I believed, safety concerns prevented most types of boosters. http://www.rocketryplanet.com/content/view/3706/30/#axzz1jgQ85qx1 -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 Note to GMail Account users. Due to an abnormally high volume of spam originating from bogus GMail accounts, I have found it necessary to block certain GMail traffic. Please phone me if you believe your message was not received. ___ Sent via AMSAT-BB@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
[amsat-bb] Re: APRS on Bernuda and Atlantic
Bob; What would be the legality (maritime and otherwise) of a floating solar powered APRS equipped raft? I am thinking along the lines of a Styrofoam NERF-ball type approach that would pose little danger to ships but could be big enough for solar panels, APRS, GPS, weather station, camera and other experiments . Something that could serve as a relay as well as a data collection experiment. For comms, maybe APRS plus some high speed satellite data uplink, commercial or amateur. Think of it as an ocean going satellite! -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 Note to GMail Account users. Due to an abnormally high volume of spam originating from bogus GMail accounts, I have found it necessary to block certain GMail traffic. Please phone me if you believe your message was not received. ___ Sent via AMSAT-BB@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
[amsat-bb] Re: moderated list
No more so than should we have to have permission to transmit on a satellite. That being said, I have noticed over the years that a lot of childish stuff has been said on the AMSAT-BB which may have impacted the participation of volunteers, contribution of donations or professional offers of assistance (launch opportunities). You really never know who is reading, and you may scare off potential membership or contribution. Please think before hitting send. Unlike the PTT button, you have still a chance NOT to say whats on your mind. Message: 15 Date: Fri, 9 Dec 2011 4:33:44 -0500 From:normn3...@stny.rr.com To:amsat-bb@amsat.org amsat-bb@amsat.org Subject: [amsat-bb] moderated list Message-ID:20111209093344.KKIX1.12900.root@hrndva-web05-z02 Content-Type: text/plain; charset=utf-8 Anyone else feel the need for a moderated list? -- Joe Leikhim K4SAT Leikhim and Associates Communications Consultants Oviedo, Florida ___ Sent via AMSAT-BB@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
[amsat-bb] For Sale: KANSAS-CITY-TRACKER-TUNER
For sale on E-bay now. Thanks http://www.ebay.com/itm/L-L-GRACE-KANSAS-CITY-TRACKER-TUNER-AUTOMATIC-SATELLITE-AMSAT-/160687865768?pt=LH_DefaultDomain_0hash=item2569be3fa8 -- Joe K4SAT ___ Sent via AMSAT-BB@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
[amsat-bb] Satellite EL/AZ slide rule for sale. For collectors.
This is not one of my satellite auctions on E-Bay, but I thought this apparently handmade military orbit calculator might be of interest to a collector. The seller is entertaining offers. Maybe a good item to have in the bomb shelter. http://www.ebay.com/itm/Satellite-Elevation-Azimuth-Military-Canadian-Navy-RCAF-/370523437235?pt=LH_DefaultDomain_2hash=item5644eaf8b3 -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 Note to GMail Account users. Due to an abnormally high volume of spam originating from bogus GMail accounts, I have found it necessary to block certain GMail traffic. Please phone me if you believe your message was not received. ___ Sent via AMSAT-BB@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
[amsat-bb] Charge for Satellite Tracking? (Kevin Gordon)
This would open a lot of legal considerations in the US with respect to prohibition for remuneration for amateur radio services. The argument can be made that if a station is only serving to RECEIVE transmissions, then the data gathering for hire may be legal, irrespective if the satellite were using amateur, scientific or commercial frequencies. This is because reception is not regulated by the FCC. If the station were to tele-command the satellite on amateur frequencies, then transmissions would be for hire and thus prohibited. The bigger issue is one of politics and cooperation. Serving as a no cost service has the political benefit of potentially getting a ride which has a bigger monetary benefit that providing an earth station for hire. Of course there is the possibility of constructing a global network to benefit a start up like SPACE-X on a quasi-commercial basis that could include a ride along agreement. This network would of course have to avoid the amateur frequencies. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 ___ Sent via AMSAT-BB@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
[amsat-bb] 70 MPH S-band dish
Bob, You might want to consider a Helical antenna for your mobile station. It would have less wind drag and easier to rotate. -- tel:407-982-0446 -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 ___ Sent via AMSAT-BB@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
[amsat-bb] READ YOU LOUD AND CLEAR - NASA Communications Book
Might be of interest to the group: http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20080020389_2008020674.pdf -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 ___ Sent via AMSAT-BB@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
[amsat-bb] Re: knowledge required
I have to laugh whenever I hear that the Ham License was dumbed down. Morse Code requires a skill (which I confess I lack), not knowledge. -- Joe Leikhim K4SAT ___ Sent via AMSAT-BB@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
[amsat-bb] Re: knowledge required
Whats with these kids today, they can't drive a car unless it has automatic transmission. Don't get me going about these wimps and their paddle shifters. If you can't drive stick shift and double clutch(without synchromesh), you should just stay home! -- SNIP-- Just give up on trying to explain to some of these drivers! They will never understand what you, Peter and others on here are talking about... The way the US has dumbed down the drivers license requirements produced them... -- SNAP-- -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 ___ Sent via AMSAT-BB@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
[amsat-bb] 100 Year Star Ship Symposium
I have attended the 100 year SSS the past two days. The real eye opener was a presentation by Claudio Maccone about using the Sun's gravitational field as a lens for optical and RF path enhancement. The effect works with any orbital mass (moon perhaps?), but the proposal was to establish fixed interstellar comm links with little path loss. I present this here because it might be food for discussion about placement of relay satellites in orbits around masses other than Earth, may have an apparent and usable gain. There are a bunch of links, you can start here. Perhaps some might want to take the math and work out how we could use our sun or moon for a gain lens for the next OSCAR, and perhaps with a wideband RX experiment. Secondly, I think SETI can benefit! The topic of ET knowing this trick was suggested. http://www.centauri-dreams.org/?p=785 -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 ___ Sent via AMSAT-BB@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
[amsat-bb] Re: Adjusting true north for azimuth rotator.
Thanks to all who replied. When I last installed the rotator, I had a free standing tower and I pored the foundation and mounting bolts such that one leg was aligned true north. In this new case, the tower face will have to be against a wall and that wall as I mentioned is +28 degrees from north. The consensus is that the azimuth rotator case can be oriented in any direction and the antenna's (and elevation rotator separation kit) be clamped to the top of the rotator aligned to true north. What I can't sort out is if I will hit a stop if I rotate full CW or CCW, before reaching the south direction. The comments seem to imply I won't. Thanks. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 ___ Sent via AMSAT-BB@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
[amsat-bb] Adjusting true north for azimuth rotator.
I am planning to install my G5400 rotator inside a tower having a welded rotator shelf. The tower is not installed yet and will have one face against the side of my house which is positioned about 28 degrees northeast (Per Google Earth). I assume when I drill the rotator shelf, I can adjust for the gross 28 degree offset of the tower. However how important is it to do this at all? Does the rotator have to be installed exactly toward true north or can I make up the difference when clamping down the antenna mast assuming the antenna is oriented true north? Note I will be using a Trakbox and need the ADC to center on true north. Secondly does anyone know if the ruler function in Google Earth points true north? It seems pretty handy that a fire plug in front of a neighbors house is at about north point. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 ___ Sent via AMSAT-BB@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
[amsat-bb] Re: g5400b problems
A while back, while moving some cables, I managed to connect a 25 pin serial cable to my 25 pin parallel printer port. Some interesting things happened, the weirdest was that my computer reported a wild CPU temperature increase. I think on my MB, the chip that handles the parallel port also performs CPU temperature monitoring and I forced the chip VCC higher than normal having RS232 voltage levels presented on its I/O pins. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 ___ Sent via AMSAT-BB@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
[amsat-bb] Aluma Tower and Yaesu G5400 Azimuth Rotor
Hi; I am in the market for an Aluma Tower T-40H, I found one which needs a few parts and DLC, (anyone else selling similar in Florida, speak up). My question is the installation of the G5400 azimuth rotor. I didn't have the tower and rotor in same place at same time, so I made up a 7 1/2 diameter template simulating the bolt hole placement and outer corners of the bolt bosses on the rotor bell. It seems that it might just fit with about 1/16 inch uncertainty. Has anyone else installed this rotor inside of an Aluma Tower T-40H? Some say it interferes with fully retracting with some rotors. Experience good or bad, please share. Thanks -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 ___ Sent via AMSAT-BB@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
[amsat-bb] Rotator repair pictures
Thanks for the excellent website. I not the motor run capacitor is viable in the pictures. Probably best to change that when you have gone to the trouble to disassemble. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 ___ Sent via AMSAT-BB@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
[amsat-bb] CQ PE1RAH
I am trying to reach William Leijenaar PE1RAH (leijenaarelectron...@yahoo.com) about his U/V 30 KHz linear transponder model LE005-R2. I get no response to his e-mails. Is there a better e-mail for him? -- Joe Leikhim K4SAT 407-982-0446 ___ Sent via AMSAT-BB@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
[amsat-bb] Re: 70cm Helicoil Good/Bad expensive?
Hi Mariano; I stand corrected! I concur that some Americans here in the states were caught accessing the satellites. What is their motivation? What dialect are they speaking? On 7/12/2011 11:14 AM, AMSAT-CT Engineering wrote: Esteemed colleague Joe Leikhim, The people as you referred as operators (...) A few years back I found some pirate (Portuguese) (...), are not Portuguese, speaking in Portuguese, but are Americans from Brazil, and are illegally, very active in the satellite. Greetings Mariano, CT1XI www.amrad.pt - Original Message - From: Joe Leikhim rhyol...@nettally.com To: amsat-bb@amsat.org Sent: Tuesday, July 12, 2011 3:18 PM Subject: [amsat-bb] Re: 70cm Helicoil Good/Bad expensive? I have an Andrew bifilar helical antenna for the240-320 MHzMILSAT band, same antenna pictured in back of their old catalogs. I paid a lot of money (mostly in shipping) to acquire it. But far less than what this seller wants. It won't do you any good in the ham bands, but you might find interesting listening in the MILSAT/Fleetsatcom bands. A few years back I found some pirate (Portuguese) operators quite active on the satellites. I think they have all been caught by an interesting mix of technology and trigonometry and have been silenced. On 07/12/2011 04:23 AM, Clint Bradford wrote: I am looking for an adapter to make this satellite helical work on my handheld radio ... http://tinyurl.com/SAT-HELICAL Clint Bradford, K6LCS -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 ___ Sent via AMSAT-BB@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 -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 ___ Sent via AMSAT-BB@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
[amsat-bb] Re: Rotator Yaesu G-5500 and Trakbox
Vincenzo; While I can't profess to be an expert on the TrakBox, (I just got one and am in process of setting up), I think that you should read the software manual carefully. You have an option of north or south pointing and you can set limits of travel. The difference in travel on yours is that it turns 450 degrees. I don't think the TrakBox can deal with the conversion of the extra 90 degrees wrapping around (Experts weigh in here). But you can program the ADC limits so that it will track 0-360. I don't see any logical reason to change the scale on your azimuth meter. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 ___ Sent via AMSAT-BB@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
[amsat-bb] G5400B
I have a G5400B AZ/EL rotor which has never had any problems. I am now reinstalling after being QRT for a long while. Is it possible to crack these open for simple inspection and a preventative greasing or am I facing a major tear-down? -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 ___ Sent via AMSAT-BB@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
[amsat-bb] Logsat anyone?
I have just reinstalled LOGSAT and Y2k upgrade after a hiatus. If I recall, the program would report the age of the KEPs on screen. Does anyone remember how to bring this up? I can't make it show up. Thanks. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 ___ Sent via AMSAT-BB@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
[amsat-bb] Re: Using Preamps In Shack
Paul; Check the electrical departments at Home Depot and Lowes for inexpensive plastic boxes made by Carlton. These are fully weatherproof boxes without any knockouts that are excellent for weatherproofing preamplifiers. You will probably need some type N bulkheads that have a long neck so that you can pass through the plastic plus whatever aluminum gauge ground plane you might want to bond your preamps to. I just got through rebuilding a wideband amplifier 25 MHz -1 GHz for my receiver, and I have a second one built at least 12 years ago for 240-270 MHz that although the box is pretty weathered, the electronics inside including a bandpass graph and notes on paper inside, look like new. Absolutely no water intrusion although outside for years. Get a bigger deeper box than you think you need. I used 6x6x5 inch boxes. For this one I used a Polyphazer pickoff to extract 15V DC from the coax to run a gasfet preamp and a WJ 28 dB gain T08 amplifier. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 ___ Sent via AMSAT-BB@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
[amsat-bb] Re: Using Preamps In Shack
Bring the parts, cables plus connectors to the store when shopping. The biggest problem is cable bend radius. On 3/14/2011 4:39 PM, Jim Jerzycke wrote: Joe speaks wisdom when he says get a bigger one that you think you need. I have a whole pile of those boxes in the garage because I thought they were big enough for the project I had intended to build in them. 73, Jim On 03/14/2011 08:13 PM, Joe Leikhim wrote: Paul; Check the electrical departments at Home Depot and Lowes for inexpensive plastic boxes made by Carlton. These are fully weatherproof boxes without any knockouts that are excellent for weatherproofing preamplifiers. You will probably need some type N bulkheads that have a long neck so that you can pass through the plastic plus whatever aluminum gauge ground plane you might want to bond your preamps to. I just got through rebuilding a wideband amplifier 25 MHz -1 GHz for my receiver, and I have a second one built at least 12 years ago for 240-270 MHz that although the box is pretty weathered, the electronics inside including a bandpass graph and notes on paper inside, look like new. Absolutely no water intrusion although outside for years. Get a bigger deeper box than you think you need. I used 6x6x5 inch boxes. For this one I used a Polyphazer pickoff to extract 15V DC from the coax to run a gasfet preamp and a WJ 28 dB gain T08 amplifier. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 ___ Sent via AMSAT-BB@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
[amsat-bb] Re: pre amp help..
I gave had good luck with the AG-25 and AG-35 used with my IC-970A. Except for one incident when I was keyed down and switched the satellite mode switch and zapped the AG-25. Apparently the internal sequencer did not expect me to do that. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 ___ Sent via AMSAT-BB@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
[amsat-bb] Looking for M Squared 2MCP14
I am looking for an M2 2MCP14. Contact me directly. Thanks -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 ___ Sent via AMSAT-BB@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
[amsat-bb] Re: Oldest working orbiting satellite? Todays, quiz!
I got my first taste of satellites listening to ATS-3 with a discone, wideband tower mounted preamp, and Regency MX-3000 receiver back in about 1984. There were continual round table discussions by the Bahia from places like Roatonga. 135.575 MHz I recall. Does anyone else recall this traffic? Is it still going on? From that I started hearing various channels of Fleetsatcom between 250 and 270 MHz, loud and clear with the same setup. The record holder appears to be ATS-3 still nominally operational after an amazing 41 years! That's impressive! -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 ___ Sent via amsat...@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
[amsat-bb] Re: Auto-Tune
The Auto-Tune software used by musicians, apparently can determine the spectral center of human voice and lock it to a particular musical key. If the same software were to be modified to identify when the pitch moved beyond a preset point (IF passband), then the receiver frequency could be automatically slewed by CIV or CAT serial commands. Imagine a standalone DSP like the Timewave having this feature. -Original Message- From: Art McBride kc6...@cox.net Sent 11/30/2009 12:41:37 AM To: rhyol...@nettally.com Subject: RE: [amsat-bb] Auto-TuneJoe, You have the IF pass band to consider. AFC on FM works well, commercially SSB receivers were designed to lock on to a -16dB pilot carrier but, Amateur radios do not have that option for either mode. Your Auto-Tune Idea could work on CW as long as it could also increment the receiver LO to keep the signal inside the IF pass-band. Art, KC6UQH -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of RFI-EMI-GUY Sent: Sunday, November 29, 2009 8:53 PM To: amsat-bb@amsat.org Subject: [amsat-bb] Auto-Tune I have been having a debate with my son about the overuse of Auto-Tune in music. Personally, I find it irritating. Then it occurred to me that I had proposed on this BB a long time ago that it would be nifty to have a DSP (Like Timewave DSP-599) that would correct for doppler. Has anyone tried Auto-Tune to correct doppler on a linear transponder? -- Joe Leikhim K4SAT The RFI-EMI-GUYC Use only Genuine Interocitor Parts Tom Servo ;-P ___ Sent via amsat...@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 __ Information from ESET NOD32 Antivirus, version of virus signature database 4647 (20091129) __ The message was checked by ESET NOD32 Antivirus.http://www.eset.com __ Information from ESET NOD32 Antivirus, version of virus signature database 4647 (20091129) __ The message was checked by ESET NOD32 Antivirus.http://www.eset.com ��___ Sent via amsat...@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
