[amsat-bb] Flames on Endeavor
Is that normal?? If anyone was watching that is... Kevin ___ 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: Flames on Endeavor
On 06/01/11 02:48, Kevin Deane wrote: Is that normal?? If anyone was watching that is... Kevin ___ 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 Yes, it's the APU, I think. --STeve Andre' wb8wsf en72 ___ 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] G5500 change voltage supply
I have purchased a G5500. The control box have a 117Vac label in the real panel. I opened it and a wire is connected through the fuse to the terminal number 3 of the KT-30 transformer and the other wire through the main switch to the terminal number 1 of the KT-30 transformer. I am wondering how I should connect it to work with 220Vac in Europe. Thanks in advance. ea4...@amsat.org ___ 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] Thrust bearing maintenance
I have an Yaesu GS-050 thrust bearing that has been installed for about 15 years. The thrust bearing turns, but requires a lot of force. I disassembled the thrust bearing to find that the grease is very sticky (think candy apple sticky), and not lubricative (if that is a word). Should I take it to an auto repair shop and ask them to degrease and then lubricate similar to repacking a wheel bearing? What kind of grease should be used? Thanks and 73, Steve N9IP -- Steve Belter ___ 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: [sarex] Re: ISS to be reboosted June 3rd
Justin, Actually, the orbit is holding up pretty well for AO-51. The ISS is big enough, and low enough, that drag is a significant factor. Drag is _roughly_ 200 times higher for the ISS than AO-51. Even ARISSat-1, which will start at the ISS orbit, will have a lifetime of much less than a year. There is a good article on this in the latest AMSAT Journal. What we really need is for the Energizer Bunny to stop by and swap out the batteries. And while he is at it, he can stop by a couple of other satellites and tap on them with a hammer to free up some stuck relays. 73s, Alan WA4SCA -Original Message- From: sarex-boun...@amsat.org [mailto:sarex-boun...@amsat.org] On Behalf Of Justin Pinnix Sent: Tuesday, May 31, 2011 8:41 AM To: apbid...@mailaps.org Cc: AMSAT-BB; SAREX-BB Subject: [sarex] Re: [amsat-bb] ISS to be reboosted June 3rd Do you think that if we asked real, real, nicely they'd go boost AO-51 for us while they're up there? :-) Just kidding - I know the reasons why this could never realistically be done. But it does give me a great deal of appreciation for how reliable a satellite can be when someone else is doing the stationkeeping work for us who has resources beyond what we could ever imagine. 73 de AJ4MJ On Tue, May 31, 2011 at 8:28 AM, Alan P. Biddle apbid...@united.net wrote: According to Roscosmos, the ISS will have its orbit raised 3.74 km Friday. This will result in a slippage of predicted times of approximately 70 seconds per day until the Keps catch up. The AMSAT NASA.ALL Keps will probably not reflect this until next week, so be certain to update from Celstrak or Space Track. http://www.federalspace.ru/main.php?id=2nid=11848lang=en 73s, Alan WA4SCA ___ 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 Sent via sa...@amsat.org. Opinions expressed are those of the author. Not an AMSAT member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/sarex ___ 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] AO51
Did not hear AO51 this morning 12.13 utc 150/880? WA4HFN em55 ___ 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: Thrust bearing maintenance
Hello Steve, 15 years outside in the weather is a long time. Options: 1. replace in kind with a new unit. Probably the most time effective and cost effective approach. The new one should last another 15+ years. 2. Soak the old unit in a solvent to loosen up all of the old grease and flush dirt out. Disassemble and inspect the bearings and bearing surfaces. This unit is foreign made so all hardware is probably metric, as are the ball bearings. Clean each ball bearing and inspect for out of roundness and pitting/corrosion. How does each bearing roll on a hard surface ? Replace all pitted bearings and all out of round. Good luck finding metric bearings, Yes, they are out there. Maybe Yaesu has a rebuild kit. Inspect the bearing surfaces for gouging and other wear. Assemble with all new parts. Be sure to grease all of the hardware threads. Do not expect the rebuilt old unit to be as mechanically tight as a new unit. Probably lots more sloppiness in the fit. After rebuild, is there is any binding no matter how light, condemn the unit. As you can see, buying a new unit is the most cost effective and time effective alternative. I just replaced a ROHN TB3 thrust bearing on my main tower, with a new unit. Good Luck with the project. Stan, W1LE Cape CodFN41sr On 6/1/2011 8:19 AM, Stephen E. Belter wrote: I have an Yaesu GS-050 thrust bearing that has been installed for about 15 years. The thrust bearing turns, but requires a lot of force. I disassembled the thrust bearing to find that the grease is very sticky (think candy apple sticky), and not lubricative (if that is a word). Should I take it to an auto repair shop and ask them to degrease and then lubricate similar to repacking a wheel bearing? What kind of grease should be used? Thanks and 73, Steve N9IP -- Steve Belter ___ 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 ___ 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: Thrust bearing maintenance
Hello Steve What I have done in the past Is to degrease it all and before assembly,drill and tap grease nipples in the housing,just make sure you clean all the filings before assembly.Then for regular maintenance you just have to give them a small shot of grease with a regular grease gun. Just a suggestion Good luck Howard VE4ISP - Original Message - From: Stephen E. Belter s...@wintek.com To: amsat-bb@amsat.org Sent: Wednesday, June 01, 2011 7:19 AM Subject: [amsat-bb] Thrust bearing maintenance I have an Yaesu GS-050 thrust bearing that has been installed for about 15 years. The thrust bearing turns, but requires a lot of force. I disassembled the thrust bearing to find that the grease is very sticky (think candy apple sticky), and not lubricative (if that is a word). Should I take it to an auto repair shop and ask them to degrease and then lubricate similar to repacking a wheel bearing? What kind of grease should be used? Thanks and 73, Steve N9IP -- Steve Belter ___ 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 ___ 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: G5500 change voltage supply
- Original Message - From: Juan Antonio Fernandez ea4...@gmail.com To: amsat-bb@amsat.org Sent: Wednesday, June 01, 2011 11:04 AM Subject: [amsat-bb] G5500 change voltage supply I have purchased a G5500. The control box have a 117Vac label in the real panel. I opened it and a wire is connected through the fuse to the terminal number 3 of the KT-30 transformer and the other wire through the main switch to the terminal number 1 of the KT-30 transformer. I am wondering how I should connect it to work with 220Vac in Europe. Thanks in advance. ea4...@amsat.org Hi Juan Antonio, EA4CYQ Happy to hear from you again ! How many wires comes out from the primary winding of the KT-30 transformer ? If the primay winding of KT-30 transformer has only two wires the number 3 and the number 1 then it has been winded to work only with 117 Vac and in this case you need an external autotransformer 220/117 to supply the control box. On the reversed side if the primary winding of the KT-30 transformer has four wires it means that the primary has been made with two separate windings of 117 Vac each so that is you connect two windings in parallel you can supply it with 117 Vac and if you connect two windings in series with the correct phase relationship you can supply it with 220 Vac Best 73 de i8CVS Domenico ___ 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: Flames on Endeavor
Yes normal. Yes the APU. And seen on every single landing just daytime landings looks like steam not flames. But the noise is the same either way. 73,tom n4zpt On 6/1/2011 2:48 AM, Kevin Deane wrote: Is that normal?? If anyone was watching that is... Kevin ___ 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: Thrust bearing maintenance
Steve, I worked with bearings for many years as a Gyro overhauler and radar tech for Sperry. The bearings I worked with were all high quality and close tolerance. If you want to, you can remove the grease with a degreaser and repack. Unless it was used constantly spinning, I don't think it could be worn-Just weathered grease. If you go to an auto supply place, you will find the wheelpacking high temp type and it will work fine. Replacing the thrust bearing probably would be the best way to go. It shouldn't be bound up at all and free to rotate. It IS supposed to support the mast to alleviate pressure on the rotor. Your call since you are doing this. 73, Dee, NB2F -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Stephen E. Belter Sent: Wednesday, June 01, 2011 8:20 AM To: amsat-bb@amsat.org Subject: [amsat-bb] Thrust bearing maintenance I have an Yaesu GS-050 thrust bearing that has been installed for about 15 years. The thrust bearing turns, but requires a lot of force. I disassembled the thrust bearing to find that the grease is very sticky (think candy apple sticky), and not lubricative (if that is a word). Should I take it to an auto repair shop and ask them to degrease and then lubricate similar to repacking a wheel bearing? What kind of grease should be used? Thanks and 73, Steve N9IP -- Steve Belter ___ 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 ___ 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: G5500 change voltage supply
I have both rotor manuals for G5500 - G5400/5600 Yaesu units. The schematics for both DO NOT show any wiring changes for the transformers to work on 117VAC or 220VAC. The manuals do say that there are Different transformers for 117 and 220 VAC use. It even states that they should be returned to have the proper transformer installed if incorrect- This means that there may not be a universal transformer installed and only wiring changes to correct the AC input. Check with Yaesu for the correct transformer part number required. Good Luck, Dee, NB2F -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Juan Antonio Fernandez Sent: Wednesday, June 01, 2011 5:04 AM To: amsat-bb@amsat.org Subject: [amsat-bb] G5500 change voltage supply I have purchased a G5500. The control box have a 117Vac label in the real panel. I opened it and a wire is connected through the fuse to the terminal number 3 of the KT-30 transformer and the other wire through the main switch to the terminal number 1 of the KT-30 transformer. I am wondering how I should connect it to work with 220Vac in Europe. Thanks in advance. ea4...@amsat.org ___ 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 ___ 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: Thrust bearing maintenance
Hi Steve, I don't have any experience with rotors, but a car repair shop is going to charge you an arm and a leg for something you can probably do yourself. Go to AutoZone and pickup a can of heavy engine degreaser (the red can w/ orange lid is the good stuff). You can also pickup a can of wheel bearing grease (should say that on the can), and use that to repack the bearing. If you don't see the grease just ask one of the employees and show them what you are using it on. You can also get this stuff at any store that carries auto supplies. Hope that helps... 73! Zack KD8KSN -Original Message- From: Stephen E. Belter Sent: Wednesday, June 01, 2011 8:19 AM To: amsat-bb@amsat.org Subject: [amsat-bb] Thrust bearing maintenance I have an Yaesu GS-050 thrust bearing that has been installed for about 15 years. The thrust bearing turns, but requires a lot of force. I disassembled the thrust bearing to find that the grease is very sticky (think candy apple sticky), and not lubricative (if that is a word). Should I take it to an auto repair shop and ask them to degrease and then lubricate similar to repacking a wheel bearing? What kind of grease should be used? Thanks and 73, Steve N9IP -- Steve Belter ___ 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 ___ 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: AO51
It wasn't on. Mark N8MH On Wed, Jun 1, 2011 at 9:14 AM, wa4...@comcast.net wrote: Did not hear AO51 this morning 12.13 utc 150/880? WA4HFN em55 ___ 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 -- Mark L. Hammond [N8MH] ___ 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: Thrust bearing maintenance
I own this thrust bearing but imho it is not worth investing time and material in such a low cost item. Get a new one and save yourself time. Clean the old one and sell it on ebay as used. Sent from my Adobe Flash and Java challenged iPhone On Jun 1, 2011, at 9:07 AM, Zachary Beougher zack.kd8...@hotmail.com wrote: Hi Steve, I don't have any experience with rotors, but a car repair shop is going to charge you an arm and a leg for something you can probably do yourself. Go to AutoZone and pickup a can of heavy engine degreaser (the red can w/ orange lid is the good stuff). You can also pickup a can of wheel bearing grease (should say that on the can), and use that to repack the bearing. If you don't see the grease just ask one of the employees and show them what you are using it on. You can also get this stuff at any store that carries auto supplies. Hope that helps... 73! Zack KD8KSN -Original Message- From: Stephen E. Belter Sent: Wednesday, June 01, 2011 8:19 AM To: amsat-bb@amsat.org Subject: [amsat-bb] Thrust bearing maintenance I have an Yaesu GS-050 thrust bearing that has been installed for about 15 years. The thrust bearing turns, but requires a lot of force. I disassembled the thrust bearing to find that the grease is very sticky (think candy apple sticky), and not lubricative (if that is a word). Should I take it to an auto repair shop and ask them to degrease and then lubricate similar to repacking a wheel bearing? What kind of grease should be used? Thanks and 73, Steve N9IP -- Steve Belter ___ 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 ___ 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 ___ 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: Thrust bearing maintenance
Right or wrong, I use a Molybdenum Disulphide based grease. Over here (UK) Castrol Moly Grease. I use it for bearings, rotators and mast use. Always worked for me. Degrease the housing and balls with spirit, clean and allow to dry. If the balls are unduly worn I'd replace them. Then repack with grease and assemble. -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Stephen E. Belter Sent: 01 June 2011 13:20 To: amsat-bb@amsat.org Subject: [amsat-bb] Thrust bearing maintenance I have an Yaesu GS-050 thrust bearing that has been installed for about 15 years. The thrust bearing turns, but requires a lot of force. I disassembled the thrust bearing to find that the grease is very sticky (think candy apple sticky), and not lubricative (if that is a word). Should I take it to an auto repair shop and ask them to degrease and then lubricate similar to repacking a wheel bearing? What kind of grease should be used? Thanks and 73, Steve N9IP -- Steve Belter ___ 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] History of OSCAR
There is a WONDERFUL 103-slide presentation posted on the front page of the AMSAT-NA site. AMSAT Slide Show Space Day 2011 is a 5.6MB .pdf, prepared by Perry Klein, W3PK and Dick Daniels, W4PUJ. It contains some great photographs from the archives on Project OSCAR and AMSAT. Truly a must-view! Clint Bradford, K6LCS http://www.work-sat.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: G5500 change voltage supply
Here is the mod to change Yaesu rotors to 220v: http://www.hamcity.com/store/pc/catalog/pdf/220vconversion.pdf But perhaps yours has a different transformer if it uses pin 3 for 117v. In the mod, pins 0 and 3 are for 220v. 73, Bill NZ5N Subject: [amsat-bb] G5500 change voltage supply I have purchased a G5500. The control box have a 117Vac label in the real panel. I opened it and a wire is connected through the fuse to the terminal number 3 of the KT-30 transformer and the other wire through the main switch to the terminal number 1 of the KT-30 transformer. I am wondering how I should connect it to work with 220Vac in Europe. Thanks in advance. ea4...@amsat.org ___ 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: Thrust bearing maintenance
At 04:19 AM 6/1/2011, Stephen E. Belter wrote: I have an Yaesu GS-050 thrust bearing that has been installed for about 15 years. The thrust bearing turns, but requires a lot of force. I disassembled the thrust bearing to find that the grease is very sticky (think candy apple sticky), and not lubricative (if that is a word). Should I take it to an auto repair shop and ask them to degrease and then lubricate similar to repacking a wheel bearing? What kind of grease should be used? Thanks and 73, Steve N9IP -- Steve Belter Steve, When I was building my tower#2 in 2008, I considered buying a Rohn TH-3 thrust bearing (about $200+) and was advised to look in ebay. I found a nice 3-inch ball-bearing radial-thrust bearing for about $35 (brand new). It has a zerk fitting for a grease gun to maintain the lubrication (which at the slow rotation of antennas is almost never). Ebay might be cheaper than a re-build. 73, Ed - KL7UW 73, Ed - KL7UW, WD2XSH/45 == BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 50-1.1kw?, 144-1.4kw, 432-100w, 1296-testing*, 3400-? DUBUS Magazine USA Rep dubus...@hotmail.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: G5500 change voltage supply
Look closer--Wrong rotor and I imagine you jump the other connections together to have the voltage correct. Again, Check the G5500 manual. Dee -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Bill Dzurilla Sent: Wednesday, June 01, 2011 12:53 PM To: amsat-bb@amsat.org Cc: ea4...@amsat.org Subject: [amsat-bb] Re: G5500 change voltage supply Here is the mod to change Yaesu rotors to 220v: http://www.hamcity.com/store/pc/catalog/pdf/220vconversion.pdf But perhaps yours has a different transformer if it uses pin 3 for 117v. In the mod, pins 0 and 3 are for 220v. 73, Bill NZ5N Subject: [amsat-bb] G5500 change voltage supply I have purchased a G5500. The control box have a 117Vac label in the real panel. I opened it and a wire is connected through the fuse to the terminal number 3 of the KT-30 transformer and the other wire through the main switch to the terminal number 1 of the KT-30 transformer. I am wondering how I should connect it to work with 220Vac in Europe. Thanks in advance. ea4...@amsat.org ___ 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 ___ 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: G5500 change voltage supply
The pdf say G5500 in handwriting and I know a guy who says he did this mod on a G5500. But obviously the KT-30 must be a different transformer. 73, Bill --- On Wed, 6/1/11, Dee morse...@optonline.net wrote: From: Dee morse...@optonline.net Subject: RE: [amsat-bb] Re: G5500 change voltage supply To: 'Bill Dzurilla' billdz@yahoo.com, amsat-bb@amsat.org Cc: ea4...@amsat.org Date: Wednesday, June 1, 2011, 1:24 PM Look closer--Wrong rotor and I imagine you jump the other connections together to have the voltage correct. Again, Check the G5500 manual. Dee -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Bill Dzurilla Sent: Wednesday, June 01, 2011 12:53 PM To: amsat-bb@amsat.org Cc: ea4...@amsat.org Subject: [amsat-bb] Re: G5500 change voltage supply Here is the mod to change Yaesu rotors to 220v: http://www.hamcity.com/store/pc/catalog/pdf/220vconversion.pdf But perhaps yours has a different transformer if it uses pin 3 for 117v. In the mod, pins 0 and 3 are for 220v. 73, Bill NZ5N Subject: [amsat-bb] G5500 change voltage supply I have purchased a G5500. The control box have a 117Vac label in the real panel. I opened it and a wire is connected through the fuse to the terminal number 3 of the KT-30 transformer and the other wire through the main switch to the terminal number 1 of the KT-30 transformer. I am wondering how I should connect it to work with 220Vac in Europe. Thanks in advance. ea4...@amsat.org ___ 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 ___ 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] SAT VUCC
SAT VUCC standings now on LotW, June 1 2011 Ron, W6ZQ ___ 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: G5500 change voltage supply
Hi Bill, NZ5N I was looking at the schematic diagram http://www.hamcity.com/store/pc/catalog/pdf/220vconversion.pdf As I suspected the transformer has 4 wires coming off from the primary windings. In my opinion the transformer has two identical primary windings to work in parallel from 100 to 117 volt and in series with 220 volt For 100 or 117 volt connect terminal 0 with terminal 2 and the terminal 1 to terminal 3 so that both primary windings are in parallel and in phase after that connect the 117 volt line to terminals 0 and 2 For 220 volt connect terminal 1 to terminal 2 and the 220 volt line to terminals 0 and 3 73 de i8CVS Domenico - Original Message - From: Bill Dzurilla billdz@yahoo.com To: amsat-bb@amsat.org Cc: ea4...@amsat.org Sent: Wednesday, June 01, 2011 6:53 PM Subject: [amsat-bb] Re: G5500 change voltage supply Here is the mod to change Yaesu rotors to 220v: http://www.hamcity.com/store/pc/catalog/pdf/220vconversion.pdf But perhaps yours has a different transformer if it uses pin 3 for 117v. In the mod, pins 0 and 3 are for 220v. 73, Bill NZ5N Subject: [amsat-bb] G5500 change voltage supply I have purchased a G5500. The control box have a 117Vac label in the real panel. I opened it and a wire is connected through the fuse to the terminal number 3 of the KT-30 transformer and the other wire through the main switch to the terminal number 1 of the KT-30 transformer. I am wondering how I should connect it to work with 220Vac in Europe. Thanks in advance. ea4...@amsat.org ___ 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 ___ 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: G5500 change voltage supply
Hi, Apologise ! I was wrong and please amend my previous message with with the following one 73 de i8CVS Domenico - Original Message - From: i8cvs domenico.i8...@tin.it To: Bill Dzurilla billdz@yahoo.com; Amsat - BBs amsat-bb@amsat.org Cc: ea4...@amsat.org Sent: Wednesday, June 01, 2011 10:13 PM Subject: Re: [amsat-bb] Re: G5500 change voltage supply Hi Bill, NZ5N I was looking at the schematic diagram http://www.hamcity.com/store/pc/catalog/pdf/220vconversion.pdf As I suspected the transformer has 4 wires coming off from the primary windings. In my opinion the transformer has two identical primary windings to work in parallel from 100 to 117 volt and in series with 220 volt For 100 or 117 volt jump terminal 0 to terminal 2 and terminal 1 to terminal 3 so that both primary windings are in parallel and in phase after that connect the 117 volt line to terminals 0 and 1 or 2 and 3 For 220 volt jump terminal 1 to terminal 2 and connect the 220 volt line to terminals 0 and 3 73 de i8CVS Domenico - Original Message - From: Bill Dzurilla billdz@yahoo.com To: amsat-bb@amsat.org Cc: ea4...@amsat.org Sent: Wednesday, June 01, 2011 6:53 PM Subject: [amsat-bb] Re: G5500 change voltage supply Here is the mod to change Yaesu rotors to 220v: http://www.hamcity.com/store/pc/catalog/pdf/220vconversion.pdf But perhaps yours has a different transformer if it uses pin 3 for 117v. In the mod, pins 0 and 3 are for 220v. 73, Bill NZ5N Subject: [amsat-bb] G5500 change voltage supply I have purchased a G5500. The control box have a 117Vac label in the real panel. I opened it and a wire is connected through the fuse to the terminal number 3 of the KT-30 transformer and the other wire through the main switch to the terminal number 1 of the KT-30 transformer. I am wondering how I should connect it to work with 220Vac in Europe. Thanks in advance. ea4...@amsat.org ___ 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 ___ 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: What Astronauts Photograph
Very nice, Thanks Clint Don WB5EKU On Wed, Jun 1, 2011 at 2:41 PM, Clint Bradford clintbradf...@mac.com wrote: This high definition short is a fascinating document. Narrated by NASA's Dr. Justin Wilkinson, it shows a tour of planet Earth as seen by astronauts, explaining what are the places that they first focus on while in orbit. http://www.youtube.com/watch?v=rj18UQjPpGA Clint Bradford clintbradf...@mac.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 ___ 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] Fixed! Re: Landwehr 70cm preamp device question?
Hello All, You gotta love a happy ending ;) Thanks to I8CVS, Domenico; Vince, KB7ADL; and Jerry, K5OE for the advice and coaching with troubleshooting my Landwehr 70 cm preamp. I took the cover off and applied 12V, and the two relays closedor did they?!? One side looked good, while the other side didn't quite push the little white button enough to make the contacts meet. It was stuck--just a gentle push with the finger, and I could tell it had become unstuck. Inserted back in line, and bingo! It's working just fine. I have resisted my urges to spray something down in there...figure I can unstick it the same way another time, should it happen. Looks like the preamp was made in 1990, based on the dates of the relays. What I was seeing seemed like it might be a relay issue on one side (could hear a rise in noise, so the relay at the output side (rig) was working--but the relay on the input side (antenna) wasn't. So, when powered, the input relay didn't switch over correctly--what I was seeing now makes sense! Anyhow, it wasn't the GaAsFET after all. Thanks again for the help, guys. 73, Mark N8MH - Original Message - From: Mark L. Hammond marklhamm...@gmail.com To: Amsat - BBs amsat-bb@amsat.org Sent: Tuesday, May 31, 2011 8:00 PM Subject: [amsat-bb] Landwehr 70cm preamp device question? Hello All, I have an old Landwehr preamp that apparently uses the MGF1402 device (does that sound right?). It's not working so I presume it's the GaAsFET. Can the MGF1302 be substituted for the original MGF1402? Or can anybody recommend another device for the 70 cm Landwehr? I need to do something... Thanks in advance! -- Mark L. Hammond [N8MH] ___ 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: Fixed! Re: Landwehr 70cm preamp device question?
Hi Mark, N8MH and All guys on the list. I am very happy that you solved the problem on your preamplifier and since you took the cover off I would like to know if the relays are or not COAXIAL RELAYS or just non constant impedance relays for AC or DC applications. Can you take a picture on the inside of preamplifier and send it to me by email ? I remember that the owner of Landwehr was a 432 MHz EME'r in the early 1973 and I worked him off the moon but actually I don't remember his call letter from Sweden. I believe that he dismitted the production of the above preamplifiers many years ago. Tanks 73 de i8CVS Domenico - Original Message - From: Mark L. Hammond marklhamm...@gmail.com To: Amsat - BBs amsat-bb@amsat.org Cc: i8cvs domenico.i8...@tin.it; Vince Fiscus, KB7ADL vlfis...@mcn.net; K5OE k...@aol.com Sent: Thursday, June 02, 2011 1:44 AM Subject: Fixed! Re: Landwehr 70cm preamp device question? Hello All, You gotta love a happy ending ;) Thanks to I8CVS, Domenico; Vince, KB7ADL; and Jerry, K5OE for the advice and coaching with troubleshooting my Landwehr 70 cm preamp. I took the cover off and applied 12V, and the two relays closedor did they?!? One side looked good, while the other side didn't quite push the little white button enough to make the contacts meet. It was stuck--just a gentle push with the finger, and I could tell it had become unstuck. Inserted back in line, and bingo! It's working just fine. I have resisted my urges to spray something down in there...figure I can unstick it the same way another time, should it happen. Looks like the preamp was made in 1990, based on the dates of the relays. What I was seeing seemed like it might be a relay issue on one side (could hear a rise in noise, so the relay at the output side (rig) was working--but the relay on the input side (antenna) wasn't. So, when powered, the input relay didn't switch over correctly--what I was seeing now makes sense! Anyhow, it wasn't the GaAsFET after all. Thanks again for the help, guys. 73, Mark N8MH - Original Message - From: Mark L. Hammond marklhamm...@gmail.com To: Amsat - BBs amsat-bb@amsat.org Sent: Tuesday, May 31, 2011 8:00 PM Subject: [amsat-bb] Landwehr 70cm preamp device question? Hello All, I have an old Landwehr preamp that apparently uses the MGF1402 device (does that sound right?). It's not working so I presume it's the GaAsFET. Can the MGF1302 be substituted for the original MGF1402? Or can anybody recommend another device for the 70 cm Landwehr? I need to do something... Thanks in advance! -- Mark L. Hammond [N8MH] ___ 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: Fixed! Re: Landwehr 70cm preamp device question?
Hello Domenico I8CVS, I did take pictures while I had the cover off :) You can see and download them here: https://sites.google.com/site/marklhammond/hamradio Indeed, they are labeled COAXIAL RELAYS as you suspected. You can also see the little white button on the relays that I mentioned previously. 73! Mark N8MH At 02:42 AM 6/2/2011 +0200, i8cvs wrote: Hi Mark, N8MH and All guys on the list. I am very happy that you solved the problem on your preamplifier and since you took the cover off I would like to know if the relays are or not COAXIAL RELAYS or just non constant impedance relays for AC or DC applications. Can you take a picture on the inside of preamplifier and send it to me by email ? I remember that the owner of Landwehr was a 432 MHz EME'r in the early 1973 and I worked him off the moon but actually I don't remember his call letter from Sweden. I believe that he dismitted the production of the above preamplifiers many years ago. Tanks 73 de i8CVS Domenico - Original Message - From: Mark L. Hammond marklhamm...@gmail.com To: Amsat - BBs amsat-bb@amsat.org Cc: i8cvs domenico.i8...@tin.it; Vince Fiscus, KB7ADL vlfis...@mcn.net; K5OE k...@aol.com Sent: Thursday, June 02, 2011 1:44 AM Subject: Fixed! Re: Landwehr 70cm preamp device question? Hello All, You gotta love a happy ending ;) Thanks to I8CVS, Domenico; Vince, KB7ADL; and Jerry, K5OE for the advice and coaching with troubleshooting my Landwehr 70 cm preamp. I took the cover off and applied 12V, and the two relays closedor did they?!? One side looked good, while the other side didn't quite push the little white button enough to make the contacts meet. It was stuck--just a gentle push with the finger, and I could tell it had become unstuck. Inserted back in line, and bingo! It's working just fine. I have resisted my urges to spray something down in there...figure I can unstick it the same way another time, should it happen. Looks like the preamp was made in 1990, based on the dates of the relays. What I was seeing seemed like it might be a relay issue on one side (could hear a rise in noise, so the relay at the output side (rig) was working--but the relay on the input side (antenna) wasn't. So, when powered, the input relay didn't switch over correctly--what I was seeing now makes sense! Anyhow, it wasn't the GaAsFET after all. Thanks again for the help, guys. 73, Mark N8MH - Original Message - From: Mark L. Hammond marklhamm...@gmail.com To: Amsat - BBs amsat-bb@amsat.org Sent: Tuesday, May 31, 2011 8:00 PM Subject: [amsat-bb] Landwehr 70cm preamp device question? Hello All, I have an old Landwehr preamp that apparently uses the MGF1402 device (does that sound right?). It's not working so I presume it's the GaAsFET. Can the MGF1302 be substituted for the original MGF1402? Or can anybody recommend another device for the 70 cm Landwehr? I need to do something... Thanks in advance! -- Mark L. Hammond [N8MH] ___ 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: Fixed! Re: Landwehr 70cm preamp device question?
One more update: the relays can be purchased here! http://radiodan.com/ted_stuff/tohtsu.htm 73, Mark N8MH At 09:33 PM 6/1/2011 -0400, Mark L. Hammond wrote: Hello Domenico I8CVS, I did take pictures while I had the cover off :) You can see and download them here: https://sites.google.com/site/marklhammond/hamradio Indeed, they are labeled COAXIAL RELAYS as you suspected. You can also see the little white button on the relays that I mentioned previously. 73! Mark N8MH At 02:42 AM 6/2/2011 +0200, i8cvs wrote: Hi Mark, N8MH and All guys on the list. I am very happy that you solved the problem on your preamplifier and since you took the cover off I would like to know if the relays are or not COAXIAL RELAYS or just non constant impedance relays for AC or DC applications. Can you take a picture on the inside of preamplifier and send it to me by email ? I remember that the owner of Landwehr was a 432 MHz EME'r in the early 1973 and I worked him off the moon but actually I don't remember his call letter from Sweden. I believe that he dismitted the production of the above preamplifiers many years ago. Tanks 73 de i8CVS Domenico - Original Message - From: Mark L. Hammond marklhamm...@gmail.com To: Amsat - BBs amsat-bb@amsat.org Cc: i8cvs domenico.i8...@tin.it; Vince Fiscus, KB7ADL vlfis...@mcn.net; K5OE k...@aol.com Sent: Thursday, June 02, 2011 1:44 AM Subject: Fixed! Re: Landwehr 70cm preamp device question? Hello All, You gotta love a happy ending ;) Thanks to I8CVS, Domenico; Vince, KB7ADL; and Jerry, K5OE for the advice and coaching with troubleshooting my Landwehr 70 cm preamp. I took the cover off and applied 12V, and the two relays closedor did they?!? One side looked good, while the other side didn't quite push the little white button enough to make the contacts meet. It was stuck--just a gentle push with the finger, and I could tell it had become unstuck. Inserted back in line, and bingo! It's working just fine. I have resisted my urges to spray something down in there...figure I can unstick it the same way another time, should it happen. Looks like the preamp was made in 1990, based on the dates of the relays. What I was seeing seemed like it might be a relay issue on one side (could hear a rise in noise, so the relay at the output side (rig) was working--but the relay on the input side (antenna) wasn't. So, when powered, the input relay didn't switch over correctly--what I was seeing now makes sense! Anyhow, it wasn't the GaAsFET after all. Thanks again for the help, guys. 73, Mark N8MH - Original Message - From: Mark L. Hammond marklhamm...@gmail.com To: Amsat - BBs amsat-bb@amsat.org Sent: Tuesday, May 31, 2011 8:00 PM Subject: [amsat-bb] Landwehr 70cm preamp device question? Hello All, I have an old Landwehr preamp that apparently uses the MGF1402 device (does that sound right?). It's not working so I presume it's the GaAsFET. Can the MGF1302 be substituted for the original MGF1402? Or can anybody recommend another device for the 70 cm Landwehr? I need to do something... Thanks in advance! -- Mark L. Hammond [N8MH] ___ 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 ___ 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] Museum Ships Weekend
All, This weekend, I'll be operating with the Thunderbird Amateur radio Club from the anchor Signal mast of the USS Arizona during Museum Ships weekend. While most of my operating will be on Sunday on HF, I hope to be able to work a pass or two on the birds. Not sure what ones but listen for me, I'll be operating under the club's call W7TBC from grid DM33wk. I'll try to post a list of passes as the day draws nearer. For more info on Ships weekend: http://www.nj2bb.org/museum/ Clear Skies Rick Tejera Saguaro Astronomy Club Phoenix, Arizona http://www.saguaroastro.org/ www.saguaroastro.org saguaroas...@cox.net K7TEJ, AMSAT 38452 ___ 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] Show Low AZ hamfest on Saturday (4 June)
Hi! Just as I got back from Australia a few days ago and have been back to the office, I will be at another hamfest on Saturday morning. I will be at the White Mountain Hamfest in Show Low, Arizona. The hamfest is at the Show Low campus of Northland Pioneer College along Deuce of Clubs Avenue, hosted by the Kachina Amateur Radio Club. More information about the hamfest is available at: http://www.whitemountainhamfest.com/ WD9EWK will be on various satellite passes throughout the hamfest, which is officially slated to run from 7am to 1pm (1400-2000 UTC). If I can get into the hamfest site earlier, I will try to work passes starting around 1300 UTC. Please call WD9EWK if you hear me on the air. The hamfest is in grid DM44xf. After the hamfest, I may make a short drive to the DM44/DM54 grid boundary very close to Show Low for the afternoon and maybe early evening passes. Depending on when everyone starts shutting down at the hamfest, I may try for a spot north of the hamfest along I-40 and look to operate from the DM54/DM55 boundary (a location I worked from a couple of years ago). Regardless of where I end up for the afternoon, I will return home Saturday evening. As with my other hamfests and road trips, I will be happy to confirm QSOs made with WD9EWK. No need to first send me a QSL card; just an e-mail with the QSO details will suffice. I will also upload all QSOs to Logbook of the World. 73! Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/ ___ 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] AO-51 over Hawaii
ALOHA Nothing heard from AO-51 on 145.150 up, 435.880 down (hope those are the right freqs). AO-51 was coming out of eclipse having crossed over the south pacific. High pass. 73 robert, NH7WN Honolulu ___ 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] w1w this weekend
kc0zhf will be operating satellite's as w1w special events as will others that are doing HF contacts, for the Wyoming state convention good chance to get WY and DN71 if you need them, Rodney kc0zhf VP shywy ARC WY amsat area coordinator ___ 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: Fixed! Re: Landwehr 70cm preamp device question?
Hi Mark, N8MH I have seen the pictures of your Landwehr 70 cm preamplifier and I know very well the model of coax relays used in it. They are 50 ohm coax relays Tohtsu CX 120 P for printed circuits and can handle 150 watt pep at 500 MHz with an insertion loss of 0.2 dB and a crosstallk (insulation) of 35 dB with a VSWR of 1,08 at 1 GHz don't worry about to clean the contacts because they are very large silver contacts and you just need to remove the side cover with your fingers and spry a contact cleaner over it. I use four of them in my switching four polarizations switcher on a 70 cm crossed yagi as you can read into the AMSAT Journal March/April and May/June 2007 Have fun 73 de i8CVS Domenico - Original Message - From: Mark L. Hammond marklhamm...@gmail.com To: i8cvs domenico.i8...@tin.it; Amsat - BBs amsat-bb@amsat.org Cc: Vince Fiscus, KB7ADL vlfis...@mcn.net; K5OE k...@aol.com Sent: Thursday, June 02, 2011 3:33 AM Subject: Re: Fixed! Re: Landwehr 70cm preamp device question? Hello Domenico I8CVS, I did take pictures while I had the cover off :) You can see and download them here: https://sites.google.com/site/marklhammond/hamradio Indeed, they are labeled COAXIAL RELAYS as you suspected. You can also see the little white button on the relays that I mentioned previously. 73! Mark N8MH At 02:42 AM 6/2/2011 +0200, i8cvs wrote: Hi Mark, N8MH and All guys on the list. I am very happy that you solved the problem on your preamplifier and since you took the cover off I would like to know if the relays are or not COAXIAL RELAYS or just non constant impedance relays for AC or DC applications. Can you take a picture on the inside of preamplifier and send it to me by email ? I remember that the owner of Landwehr was a 432 MHz EME'r in the early 1973 and I worked him off the moon but actually I don't remember his call letter from Sweden. I believe that he dismitted the production of the above preamplifiers many years ago. Tanks 73 de i8CVS Domenico - Original Message - From: Mark L. Hammond marklhamm...@gmail.com To: Amsat - BBs amsat-bb@amsat.org Cc: i8cvs domenico.i8...@tin.it; Vince Fiscus, KB7ADL vlfis...@mcn.net; K5OE k...@aol.com Sent: Thursday, June 02, 2011 1:44 AM Subject: Fixed! Re: Landwehr 70cm preamp device question? Hello All, You gotta love a happy ending ;) Thanks to I8CVS, Domenico; Vince, KB7ADL; and Jerry, K5OE for the advice and coaching with troubleshooting my Landwehr 70 cm preamp. I took the cover off and applied 12V, and the two relays closedor did they?!? One side looked good, while the other side didn't quite push the little white button enough to make the contacts meet. It was stuck--just a gentle push with the finger, and I could tell it had become unstuck. Inserted back in line, and bingo! It's working just fine. I have resisted my urges to spray something down in there...figure I can unstick it the same way another time, should it happen. Looks like the preamp was made in 1990, based on the dates of the relays. What I was seeing seemed like it might be a relay issue on one side (could hear a rise in noise, so the relay at the output side (rig) was working--but the relay on the input side (antenna) wasn't. So, when powered, the input relay didn't switch over correctly--what I was seeing now makes sense! Anyhow, it wasn't the GaAsFET after all. Thanks again for the help, guys. 73, Mark N8MH - Original Message - From: Mark L. Hammond marklhamm...@gmail.com To: Amsat - BBs amsat-bb@amsat.org Sent: Tuesday, May 31, 2011 8:00 PM Subject: [amsat-bb] Landwehr 70cm preamp device question? Hello All, I have an old Landwehr preamp that apparently uses the MGF1402 device (does that sound right?). It's not working so I presume it's the GaAsFET. Can the MGF1302 be substituted for the original MGF1402? Or can anybody recommend another device for the 70 cm Landwehr? I need to do something... Thanks in advance! -- Mark L. Hammond [N8MH] ___ 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
