Re: [Elecraft] DC-supply for a preamp?
Hello all, thank you for all the info about losses in a coax cable, but the original question was if this is a good or a bad idea. Lots of qsb, so it disappeared in the noise. :-) I've been thinking about it myself, my conclusion is: no good idea. Even if the K3 passes the supply voltage to it's antenna jack, bad things can happen if you forget to switch the supply off, when you change antennas, switch to your dummyload, you name it. So it is a big NONO. Martin -- 73 , DM4iM __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] DC-supply for a preamp?
I seem to recall that several companies make bias T devices that allow RF to pass but block DC in one direction. Thus these are suitable for feeding DC to a antenna mounted preamp. Then the challenge of switching the preamp out of line for transmit is next. For my EME applications I have made my own bias T. I apply DC to the bias T that switches the preamp in line and supplies power to same. For transmit I remove the DC from the bias T thus turning off the preamp and switching it out of line. Personally, two feedlines, one for RX and one for TX and a separate DC control cable is the more reliable system, specially when running high legal limit power. I've vaporized more than one preamp PCB and other components in the past not to mention the more likely probability of a relay failure on the top side. My rule is the less stuff in the RF path, they better the reliability. Low loss feedline is the best approach. 73 Bob, K4TAX - Original Message - From: DM4iM hamra...@vr-web.de To: Reflector Elecraft Elecraft@mailman.qth.net Sent: Wednesday, April 28, 2010 6:18 AM Subject: Re: [Elecraft] DC-supply for a preamp? Hello all, thank you for all the info about losses in a coax cable, but the original question was if this is a good or a bad idea. Lots of qsb, so it disappeared in the noise. :-) I've been thinking about it myself, my conclusion is: no good idea. Even if the K3 passes the supply voltage to it's antenna jack, bad things can happen if you forget to switch the supply off, when you change antennas, switch to your dummyload, you name it. So it is a big NONO. Martin -- 73 , DM4iM __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] DC-supply for a preamp?
Martin, it is a common idea. The antenna tuners and remote relays that use only the coax use the idea. The big danger is connecting the injection port incorrectly and putting the 12 volts on your transceiver. I have a dead TS-850 waiting for repair because I connected the injection port backwards for my MFJ Antenna Tuner. I have been holding off on this note because I hoped for official work from Elecraft, but I have seen none, so here is your Take it for what it cost free advise. The comments about putting the amp at the transceiver have merit. Personally, I don't have an external preamp and I have about 3 db loss in my cable, but I make some nice 6 meter contacts. The people with more equipment no doubt hear better than I. Willis 'Cookie' Cooke K5EWJ From: DM4iM hamra...@vr-web.de To: Reflector Elecraft Elecraft@mailman.qth.net Sent: Wed, April 28, 2010 6:18:37 AM Subject: Re: [Elecraft] DC-supply for a preamp? Hello all, thank you for all the info about losses in a coax cable, but the original question was if this is a good or a bad idea. Lots of qsb, so it disappeared in the noise. :-) I've been thinking about it myself, my conclusion is: no good idea. Even if the K3 passes the supply voltage to it's antenna jack, bad things can happen if you forget to switch the supply off, when you change antennas, switch to your dummyload, you name it. So it is a big NONO. Martin -- 73 , DM4iM __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] DC-supply for a preamp?
This will be my last comment on this thread, which seems to be digressing from the original inquiry. However, when I see information like the one below, I feel it needs to be addressed, so inexperienced readers do not get a wrong impression and experience equipment failure as a result. The biggest reason I can think of for running the preamp voltage up the receive cable is to AVOID what K4TAX recommends below. Running a separate unshielded power line up a tower to a preamp is a sure way to generate voltage spikes which will destroy a sensitive preamplifier. Of course such spikes can be caused by induction of nearby lightning but the most common problem is simply switching transients from the relay control lines also run up the tower. Using bias T's to send the voltage to the preamp via a shielded coaxial cable is the safest way to provide a stable controlled DC voltage to a preamp. The bottom line for K3 users is to keep the coaxial loss low and keep the preamp attached to the K3. If you are operating higher frequencies where your feed line loss will degrade front end performance and you MUST mount a preamp and relays at the antenna, use shielded cable to provide voltage to the preamp. GL and VY 73, Lance On 4/28/2010 11:42 AM, Bob McGraw - K4TAX wrote: I seem to recall that several companies make bias T devices that allow RF to pass but block DC in one direction. Thus these are suitable for feeding DC to a antenna mounted preamp. Then the challenge of switching the preamp out of line for transmit is next. For my EME applications I have made my own bias T. I apply DC to the bias T that switches the preamp in line and supplies power to same. For transmit I remove the DC from the bias T thus turning off the preamp and switching it out of line. Personally, two feedlines, one for RX and one for TX and a separate DC control cable is the more reliable system, specially when running high legal limit power. I've vaporized more than one preamp PCB and other components in the past not to mention the more likely probability of a relay failure on the top side. My rule is the less stuff in the RF path, they better the reliability. Low loss feedline is the best approach. 73 Bob, K4TAX - Original Message - From: DM4iMhamra...@vr-web.de To: Reflector ElecraftElecraft@mailman.qth.net Sent: Wednesday, April 28, 2010 6:18 AM Subject: Re: [Elecraft] DC-supply for a preamp? Hello all, thank you for all the info about losses in a coax cable, but the original question was if this is a good or a bad idea. Lots of qsb, so it disappeared in the noise. :-) I've been thinking about it myself, my conclusion is: no good idea. Even if the K3 passes the supply voltage to it's antenna jack, bad things can happen if you forget to switch the supply off, when you change antennas, switch to your dummyload, you name it. So it is a big NONO. Martin -- Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX) P.O. Box 73 Frenchtown, MT 59834 USA QTH: DN27UB TEL: (406) 626-5728 URL: http://www.bigskyspaces.com/w7gj LIVE MESSENGER CHAT: w...@hotmail.com 2m DXCC #11, 6m DXCC #815 Interested in 6m EME? Ask me about subscribing to the Magic Band EME email! http://6meme.com/mailman/listinfo/magic_6meme.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] DC-supply for a preamp?
On 4/27/2010 2:32 PM, DM4iM wrote: Elecrafters, this might be a rig-killer and vy stupid, but Can i power a 6m masthead-preamp by feeding dc via choke and coupling C's to the KXV3A's in/out sockets (where the elecraft preamp is supposed to sit), or is this a big NONO? Martin Hello Martin, I think you could do better by simply installing the PR6 at the K3 and using low loss coax to the antenna. Almost all the 6m EME stations around the world use a good external preamp in the shack. If your coax cable loss is 1 dB or less, you will not gain anything by mounting the 6m preamp at the antenna. You can model this for yourself in the EME CALCULATOR (accessed from the EME ECHO MODE screen in the old WSJT Version 4). Because the EME CALCULATOR and EME ECHO MODE were never re-written in the language used in more recent revisions of WSTJ, that old version is still available: http://www.physics.princeton.edu/pulsar/K1JT/WSJT498.EXE I think you will find it much simpler to keep the preamp in the shack! GL and VY 73, Lance -- Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX) P.O. Box 73 Frenchtown, MT 59834 USA QTH: DN27UB TEL: (406) 626-5728 URL: http://www.bigskyspaces.com/w7gj LIVE MESSENGER CHAT: w...@hotmail.com 2m DXCC #11, 6m DXCC #815 Interested in 6m EME? Ask me about subscribing to the Magic Band EME email! http://6meme.com/mailman/listinfo/magic_6meme.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] DC-supply for a preamp?
Lance, what kind of coax are you using that only has one dB loss at six meters? 7/8 Heliax would do it, but LMR-400 would not unless you could keep the run under 100 feet. Willis 'Cookie' Cooke K5EWJ From: Lance Collister w...@q.com To: DM4iM hamra...@vr-web.de; Reflector Elecraft Elecraft@mailman.qth.net Sent: Tue, April 27, 2010 11:25:52 AM Subject: Re: [Elecraft] DC-supply for a preamp? On 4/27/2010 2:32 PM, DM4iM wrote: Elecrafters, this might be a rig-killer and vy stupid, but Can i power a 6m masthead-preamp by feeding dc via choke and coupling C's to the KXV3A's in/out sockets (where the elecraft preamp is supposed to sit), or is this a big NONO? Martin Hello Martin, I think you could do better by simply installing the PR6 at the K3 and using low loss coax to the antenna. Almost all the 6m EME stations around the world use a good external preamp in the shack. If your coax cable loss is 1 dB or less, you will not gain anything by mounting the 6m preamp at the antenna. You can model this for yourself in the EME CALCULATOR (accessed from the EME ECHO MODE screen in the old WSJT Version 4). Because the EME CALCULATOR and EME ECHO MODE were never re-written in the language used in more recent revisions of WSTJ, that old version is still available: http://www.physics.princeton.edu/pulsar/K1JT/WSJT498.EXE I think you will find it much simpler to keep the preamp in the shack! GL and VY 73, Lance -- Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX) P.O. Box 73 Frenchtown, MT 59834 USA QTH: DN27UB TEL: (406) 626-5728 URL: http://www.bigskyspaces.com/w7gj LIVE MESSENGER CHAT: w...@hotmail.com 2m DXCC #11, 6m DXCC #815 Interested in 6m EME? Ask me about subscribing to the Magic Band EME email! http://6meme.com/mailman/listinfo/magic_6meme.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] DC-supply for a preamp?
So use 7/8 Heliax :-) --- On Tue, 4/27/10, WILLIS COOKE wrco...@yahoo.com wrote: Date: Tuesday, April 27, 2010, 11:02 AM Lance, what kind of coax are you using that only has one dB loss at six meters? 7/8 Heliax would do it, but LMR-400 would not unless you could keep the run under 100 feet. Willis 'Cookie' Cooke K5EWJ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] DC-supply for a preamp?
That wouldn't quite reach the ground from my antenna but LMR600 has good specs. How are the connectors to work with? Do you need a flex jumper at the antenna to allow the rotor to work? I am using 230 feet of RG-213 which has about 3.5 loss according to the specs. It works, but I don't do Moon Bounce with it. Willis 'Cookie' Cooke K5EWJ From: Ken Roberson kwrober...@yahoo.com To: WILLIS COOKE wrco...@yahoo.com Sent: Tue, April 27, 2010 12:09:15 PM Subject: Re: [Elecraft] DC-supply for a preamp? Hello, I'm using About 65 ft LMR-600, and Elecraft 6M preamp,This seems to work ok. 73 Ken K5DNL -- --- On Tue, 4/27/10, WILLIS COOKE wrco...@yahoo.com wrote: From: WILLIS COOKE wrco...@yahoo.com Subject: Re: [Elecraft] DC-supply for a preamp? To: w...@q.com, DM4iM hamra...@vr-web.de, Reflector Elecraft Elecraft@mailman.qth.net Date: Tuesday, April 27, 2010, 12:02 PM Lance, what kind of coax are you using that only has one dB loss at six meters? 7/8 Heliax would do it, but LMR-400 would not unless you could keep the run under 100 feet. Willis 'Cookie' Cooke K5EWJ From: Lance Collister w...@q.com To: DM4iM hamra...@vr-web.de; Reflector Elecraft Elecraft@mailman.qth.net Sent: Tue, April 27, 2010 11:25:52 AM Subject: Re: [Elecraft] DC-supply for a preamp? On 4/27/2010 2:32 PM, DM4iM wrote: Elecrafters, this might be a rig-killer and vy stupid, but Can i power a 6m masthead-preamp by feeding dc via choke and coupling C's to the KXV3A's in/out sockets (where the elecraft preamp is supposed to sit), or is this a big NONO? Martin Hello Martin, I think you could do better by simply installing the PR6 at the K3 and using low loss coax to the antenna. Almost all the 6m EME stations around the world use a good external preamp in the shack. If your coax cable loss is 1 dB or less, you will not gain anything by mounting the 6m preamp at the antenna. You can model this for yourself in the EME CALCULATOR (accessed from the EME ECHO MODE screen in the old WSJT Version 4). Because the EME CALCULATOR and EME ECHO MODE were never re-written in the language used in more recent revisions of WSTJ, that old version is still available: http://www.physics.princeton.edu/pulsar/K1JT/WSJT498.EXE I think you will find it much simpler to keep the preamp in the shack! GL and VY 73, Lance -- Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX) P.O. Box 73 Frenchtown, MT 59834 USA QTH: DN27UB TEL: (406) 626-5728 URL: http://www.bigskyspaces.com/w7gj LIVE MESSENGER CHAT: w...@hotmail.com 2m DXCC #11, 6m DXCC #815 Interested in 6m EME? Ask me about subscribing to the Magic Band EME email! http://6meme.com/mailman/listinfo/magic_6meme.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] DC-supply for a preamp?
Hello Cookie, I am using 200' of 1-5/8 Heliax, and used LMR600 for all my phasing lines. The 10' flexible section around the rotor is LMR600UF. I think my total feedline loss is less than 0.5 dB. Before I found the free piece of big Heliax, I used free 3/4 CATV 75 ohm hardline, which also worked well at keeping the loss down. 7/8 Heliax can also frequently be found in these short lengths. If you can't find any used or end of spool pieces of hardline, new LMR600 has a loss of 0.5 dB per 100', so it also is a readily available option. With all these options, and the fact that most people have 6m feedlines shorter than 200' long, it really is getting pretty easy to achieve a feedline loss under 1.0 dB on 6m. GL and VY 73, Lance On 4/27/2010 5:02 PM, WILLIS COOKE wrote: Lance, what kind of coax are you using that only has one dB loss at six meters? 7/8 Heliax would do it, but LMR-400 would not unless you could keep the run under 100 feet. Willis 'Cookie' Cooke K5EWJ *From:* Lance Collister w...@q.com *To:* DM4iM hamra...@vr-web.de; Reflector Elecraft Elecraft@mailman.qth.net *Sent:* Tue, April 27, 2010 11:25:52 AM *Subject:* Re: [Elecraft] DC-supply for a preamp? On 4/27/2010 2:32 PM, DM4iM wrote: Elecrafters, this might be a rig-killer and vy stupid, but Can i power a 6m masthead-preamp by feeding dc via choke and coupling C's to the KXV3A's in/out sockets (where the elecraft preamp is supposed to sit), or is this a big NONO? Martin Hello Martin, I think you could do better by simply installing the PR6 at the K3 and using low loss coax to the antenna. Almost all the 6m EME stations around the world use a good external preamp in the shack. If your coax cable loss is 1 dB or less, you will not gain anything by mounting the 6m preamp at the antenna. You can model this for yourself in the EME CALCULATOR (accessed from the EME ECHO MODE screen in the old WSJT Version 4). Because the EME CALCULATOR and EME ECHO MODE were never re-written in the language used in more recent revisions of WSTJ, that old version is still available: http://www.physics.princeton.edu/pulsar/K1JT/WSJT498.EXE I think you will find it much simpler to keep the preamp in the shack! GL and VY 73, Lance -- Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX) P.O. Box 73 Frenchtown, MT 59834 USA QTH: DN27UB TEL: (406) 626-5728 URL: http://www.bigskyspaces.com/w7gj LIVE MESSENGER CHAT: w...@hotmail.com mailto:w...@hotmail.com 2m DXCC #11, 6m DXCC #815 Interested in 6m EME? Ask me about subscribing to the Magic Band EME email! http://6meme.com/mailman/listinfo/magic_6meme.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html -- Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX) P.O. Box 73 Frenchtown, MT 59834 USA QTH: DN27UB TEL: (406) 626-5728 URL: http://www.bigskyspaces.com/w7gj LIVE MESSENGER CHAT: w...@hotmail.com 2m DXCC #11, 6m DXCC #815 Interested in 6m EME? Ask me about subscribing to the Magic Band EME email! http://6meme.com/mailman/listinfo/magic_6meme.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] DC-supply for a preamp?
Hello Cookie, Wow - you must have a HUGE tower! More power to you ;-) Yes, I use LMR600UF (Ultra Flex) around the rotor...you can't use cable with a solid center conductor in an application requiring repeated flexing. The special connectors work fine, but you have to take some care and make sure you put them on properly. I just take my time when I have to put them on...it is worth it to have such low loss cable! I agree...you won't do much weak signal work with 3.5 dB loss ahead of the preamp! GL and VY 73, Lance On 4/27/2010 5:37 PM, WILLIS COOKE wrote: That wouldn't quite reach the ground from my antenna but LMR600 has good specs. How are the connectors to work with? Do you need a flex jumper at the antenna to allow the rotor to work? I am using 230 feet of RG-213 which has about 3.5 loss according to the specs. It works, but I don't do Moon Bounce with it. Willis 'Cookie' Cooke K5EWJ -- Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX) P.O. Box 73 Frenchtown, MT 59834 USA QTH: DN27UB TEL: (406) 626-5728 URL: http://www.bigskyspaces.com/w7gj LIVE MESSENGER CHAT: w...@hotmail.com 2m DXCC #11, 6m DXCC #815 Interested in 6m EME? Ask me about subscribing to the Magic Band EME email! http://6meme.com/mailman/listinfo/magic_6meme.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] DC-supply for a preamp?
Martin, I installed an ARR P50VDG preamp on the back side of my K3/10 using preamp in/out connectors on the KVX3. photo: http://www.kl7uw.com/K3-ARR-6mPreamp.jpg I will control the power via the ACC jack when I get a VGA jack. For now it is on when the K3 is on. Much easier and safer than using a bias tee and remote switched preamp. I agree with Lance that you will not likely see any improvement in sensitivity mounting the preamp at the antenna. For keeping loss down use LMR-400 coax for runs up to 100-feet, and LDF4-50A Heliax for longer runs. This keeps transmission losses down, too. 73, Ed - KL7UW I run 80-feet of LMR-400 to my 3-element 6m yagi at 55-feet on the tower. http://www.kl7uw.com/6m.htm -- Message: 2 Date: Tue, 27 Apr 2010 16:25:52 + From: Lance Collister w...@q.com Subject: Re: [Elecraft] DC-supply for a preamp? To: DM4iM hamra...@vr-web.de, Reflector Elecraft Elecraft@mailman.qth.net Message-ID: blu0-smtp74dd81c59bd56fe6e1ba3989...@phx.gbl Content-Type: text/plain; charset=ISO-8859-1; format=flowed On 4/27/2010 2:32 PM, DM4iM wrote: Elecrafters, this might be a rig-killer and vy stupid, but Can i power a 6m masthead-preamp by feeding dc via choke and coupling C's to the KXV3A's in/out sockets (where the elecraft preamp is supposed to sit), or is this a big NONO? Martin Hello Martin, I think you could do better by simply installing the PR6 at the K3 and using low loss coax to the antenna. Almost all the 6m EME stations around the world use a good external preamp in the shack. If your coax cable loss is 1 dB or less, you will not gain anything by mounting the 6m preamp at the antenna. You can model this for yourself in the EME CALCULATOR (accessed from the EME ECHO MODE screen in the old WSJT Version 4). Because the EME CALCULATOR and EME ECHO MODE were never re-written in the language used in more recent revisions of WSTJ, that old version is still available: http://www.physics.princeton.edu/pulsar/K1JT/WSJT498.EXE I think you will find it much simpler to keep the preamp in the shack! GL and VY 73, Lance -- Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX) P.O. Box 73 Frenchtown, MT 59834 USA QTH: DN27UB TEL: (406) 626-5728 URL: http://www.bigskyspaces.com/w7gj LIVE MESSENGER CHAT: w...@hotmail.com 2m DXCC #11, 6m DXCC #815 Interested in 6m EME? Ask me about subscribing to the Magic Band EME email! http://6meme.com/mailman/listinfo/magic_6meme.com 73, Ed - KL7UW, WD2XSH/45 == BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 144-600w, 432-100w, 1296-60w, 3400-fall 2010 DUBUS Magazine USA Rep dubus...@hotmail.com == __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
