Moon-net June 2011

moon-net@mailman.pe1itr.com

114 participants
136 discussions

by Steve Gross-N4PZ

I will again be calling CQ during the asian window today. I have heard nothing in the last two days in response. Where is everyone? I am trying to provide some north american activity. 1.5 KW 4.9 meter dish. 73 Steve N4PZ

11 years, 11 months

EME net notes

by Steve Gross-N4PZ

Hello All We are all still suffering from the shock of the loss of Joe K1RQG. Let's hope that the EME net participation improves. We need the help of everyone if it is to survive. No europeans were heard by myself or K2DH this morning.?????? We had half a dozen check-ins today. WB2BYP John will be active on 1296 next weekend. His signal was solid 559 this morning at my place on 1296. He is gradually building up the level of his performance to eventually reach the BIG GUN status. He has a 28 ft dish and abt 100 watts at the feed. Working on a YL-1050 which he says will give him at least 800 watts. VE3KRP was active on 1296 this morning and said he heard I5MPK calling endless CQs. W7MEM Mark has a 16 foot dish. I have no other info from him. VE6TA Grant worked PY1KK this morning on 3.4 Ghz. A round of cheers for Grant.KB3TKT John expressed his regrets abt the loss of Joe. VE4MA Barry reports that he blew his 13 cm amp last night but is working on it. He is also continueing his work on 24 Ghz with the goal of higher power. K2DH Dave helped with the net this morning. Thanks Dave. He was loud off the moon on 1296 this morning. Good show Dave. N4PZ will be active on 1296.020 as much as possible this pass of the moon. I will be looking especially for asian stations as that is my best direction. 73 Steve N4PZ

11 years, 11 months

Asteroid

by Lynn

I’m way too far North and no EME yet......... I can only dream of getting a couple of pings off Asteroid 2011 MD Monday morning at 1326 GMT. Lynn

11 years, 11 months

Re: [Moon-net] GS35b amp input problem - still not solved

by Bill Dzurilla

Thanks to all who replied to my prior posts about my 6 meter PTT problem. Unfortunately, the problem has not been solved, and hopes are growing dimmer. Today my friend came back with his TS-480, this time with a PTT cable (last time we had to use a shorted RCA plug to turn on the amp). With his PTT cable attached between the TS-480 and the amp, we had the same problem I had with my FT-847, low output and a high pitched noise from the vicinity of the GS-35b tube. Extensive efforts to find the cause and fear produced no real clues. To recap, here's what we know, what has been tried, and what can't be tried: * If the amp is keyed with a shorted RCA plug, we get full power and no noise with both the FT-847 and the TS-480. This is true even if the shorting cable is unshielded. * If the amp is keyed with a PTT cable running from the transceiver to the amp, we get noise and low power, with both the FT-847 and the TS-480. * We tried bypass capacitors on the PTT cables, no improvement. * We tried coiling the PTT cables, no improvement. * We would have liked to have tried adding ferrite to the PTT lines but could not find any and are unlikely to find any. * We tried isolating the amp from the transceiver with 2 different amp keyer isolators, one with a reed relay and the other with a transistor circuit. Neither helped. We tried using both of the isolators in cascade, but that did not help either. * We do not have access to a spectrum analyzer or an oscilloscope. * The SWR between the transceiver and the amp measures low, both with the FT-847 and the TS-480. The SWR between amp output and the antenna also is low. * The amp is brand new and under warranty. The amp may or may be not responsible for the problem, we just do not know. The builder is willing to check everything out and attempt to solve the problem, if I return the amp to his shop in Hungary. That's not a very attractive option, as it is about a 4 hour drive each way to his shop from here in Slovakia. Anyone have any further ideas? 73, Bill NZ5N/OM3BD --- On Mon, 6/20/11, Bill Dzurilla <billdz.geo(a)yahoo.com> wrote: > From: Bill Dzurilla <billdz.geo(a)yahoo.com> > Subject: Re: GS35b amp input problem > To: moon-net(a)mailman.pe1itr.com > Cc: moon-net(a)googlegroups.com > Date: Monday, June 20, 2011, 6:59 PM > Thanks to the many folks who replied > to my question. Many of the replies had great > suggestions, but only one person -- Lance W7GJ -- hit on > what appears to be my problem. Lance suggested the > problem might be in the PTT line. It seemed improbable > that this could be the issue, but when I replaced the PTT > line from my FT-847 to the amp with a shorted RCA plug, sure > enough the noise was gone and the output was up to a > kilowatt. > > We used the same shorted plug when we ran the test with the > TS-480, so it's very possible the same problem would occur > had a PTT line been connected to the TS-480. > > I have a homebrew PTT isolator, the device that connects > the rig's PTT line to a relay, and when PTT is engaged the > relay closes and triggers the amp, and I thought for sure > this would solve my problem, but it did not. Even with > the isolator in line, I get the noise and the low output. > > Any thoughts? Where do I go from here? > > 73, Bill > > --- On Mon, 6/20/11, Bill Dzurilla <billdz.geo(a)yahoo.com> > wrote: > > > From: Bill Dzurilla <billdz.geo(a)yahoo.com> > > Subject: GS35b amp input problem > > To: moon-net(a)mailman.pe1itr.com, > "Alex Artieda" <hb9dri(a)emeham.com> > > Cc: moon-net(a)googlegroups.com > > Date: Monday, June 20, 2011, 10:45 AM > > Hi, > > > > I bought a new Amplitec 160-6m kilowatt amp with a > GS-35b > > tube, details of the amp at www.amplitec.hu. Driven > by > > my FT847, the amp works great on 160-10 meters. > > However, on 6 meters there is a strange issue. I > was > > only getting 600w out, the tube lit up much brighter > than on > > other bands, and there was a high-pitched noise, like > a > > squeal or whistle, coming from the area of the > GS-35b. > > > > My friend came today with his radio and a 6 meter > antenna. > > First we tried his antenna with the amp. No success, > still > > 600 watts and the high pitch noise. > > > > Then we replaced my FT847 transceiver with his > Kenwood > > TS480. Success! No noise, 1100 watts output. But why? > Both > > radios have exactly the same output, 100 watts, we > used the > > same power supply, and we used the same coax > jumpers. > > Also, when we tested the amp at the home of the > Amplitec > > owner, he used an FT847 and there was over 1000w out > with no > > noise. > > > > So, it appears that the problem is somehow related to > my > > FT847. Any thoughts on what might be wrong or a > > possible fix? Need to get this working in time for > the > > good EME conditions starting June 30. > > > > 73, Bill NZ5N/OM3BD > > > > >

11 years, 11 months

PJ7EME NOW on the air 144.125 JT-65B 1st sequence grid FK88

by K7XQ

Just want to make a announcement that PJ7EME ( K6MYC at the rig ) Grid FK88 is NOW starting to make contacts on 144.125 MHz Jt-65B transmitting first. I hope to catch him in the morning when the moon is up high. He is strongly advising to spread out. 73, K7XQ Jeff Atwater, CA. Grid: CM97qi K7XQ Webpage: http://www.elite.net/~k7xq/k7xq.html

11 years, 11 months

Re: [Moon-net] 432 and Above EME Newsletter for July 2011

by rein0zn＠ix.netcom.com

Hello All, The 432 MHz and Above EME Newsletter for July 2011 by K2UYH is at: http://www.nitehawk.com/rasmit/em70cm.html Many news items. 2 Major Losses for the EME community. Swedish EME Meeting. 73 Rein W6SZ

11 years, 11 months

Wanted 222 Lunar Link amp..

by Marshall Williams

Hello to everyone...Sometime ago, I saw an advertisement for a Lunar Link 222 amp for sale. At the time I did not need another Lunar Link amp, so I let it go. I am now working on a 222 EME station and will need a good amp for the project. If anyone has one that you might let go, please contact me. Thank you. If you have one that you would trade for a new Lunar Link 432 RF deck(no tubes, no power supply), please contact me. 73 Marshall K5QE Phone at the home shack is 409-787-3830 if you want to talk....

11 years, 11 months

N4PZ ASIAN window NIL.

by Steve Gross-N4PZ

I will try again tomorrow until my moonset on 1296.020. 73 Steve N4PZ

11 years, 11 months

N4PZ QRV 23 cm ASIAN window today

by Steve Gross-N4PZ

Hello All. I will be on 1296.020 today. Please look for me. 1.5 KW and 4.9 meter dish, VE4MA feed. 73 Steve

11 years, 11 months

Re: [Moon-net] [Magic Band EME] VP8DMH 6m from Antarctica

by Edward R. Cole

Lance, Yes, with no trees and nothing to stop the wind, so a temporary antenna makes lots of sense in Antarctica. --------------------- Today, we got the 6m antenna raised to its permanent position at 20-feet and swung around to pointing az=120 looking for Es openings from the west coast. The telescoping mast is a bit light-weight for a 30-foot long antenna. 3/16 inch guy wires carry the main force (the mast-to-boom clamp is about 34-inches above the guy ring because I added two 4-foot angle braces to keep the antenna rigid in a horizontal plane). The strain relief uses Phillystran which keeps the 2-inch aluminum boom straight. I bought the nylon rope since it is locally available (cheap) and it will be tied and untied repeatedly as the antenna is turned for pointing. So any stretch will be taken up frequently. It is being used for tag lines on front and rear of the booms, but will also help secure the antenna during storms (normally occurring fall-winter). The biggest question will be if the set up is survivable in our winters which see winds up to 65mph. At least we know the prevailing wind comes from the NE so the antenna can be tied in that direction during winter months when there is little or no Es. Of course it will be swung to look at moon-rise (az=040-090) and moonset (az=280-330 during high positive declination days). I will scope out tie-out locations for common azimuth headings where I will set some short tie-out posts. The main guy posts are 6-foot in the ground. the weak point will be at a point right above the guy ring. I have the feedline temporarily run across the lawn to the shack (it will eventually be buried in 2-inch pvc conduit). Line loss is 1.55 dB so some sections will be replaced with lower loss cable once I receive some L5NM connectors in the mail. My goal was 0.85 dB loss from the amplifier, but the used sections of 7/8-inch line may not measure up to spec. Finding good used cable is difficult in AK. New cable is astronomical in price due to shipping costs. Running 125w I see absolutely no reflected power 50.000-50.700 MHz (in part due to the high cable loss). SWR is 1.0 from 50.180-50.350 MHz as measured on the MFJ-269B. Z=51+j0 at 50.250 MHz. I took some photos of the antenna that will be added (later) to the 6m webpage: http://www.kl7uw.com/6m.htm Specs for the antenna along with element spacing/lengths are on a link titled "6M6UW": http://www.kl7uw.com/6M6UW.htm I have some home projects that need attention and participation in field day this weekend. I will be looking to make some 6m contacts during FD from home. Then I will get working on the 50vdc PS and Harris PA. That will be mixed with some time testing my 2m-8877/HVPS and 1296-eme station. Baring any problems with the 8877, I plan to QRV on 2m-eme within a couple days. 73, Ed - KL7UW 6m-eme/ms line up: 6-element yagi (Hpol) 13 dBi, manual az rotation (no elev), K3 with ARR P50VDG preamp, Mirage A-1015G (125w), Harris Platinum PA* (up to 1100w), JT-65, JT6M, ICSAT, FSK-441A and CW/SSB for non-eme. *under construction At 03:40 PM 6/23/2011, you wrote: >Howdy Ed, > >On 6/23/2011 11:23 PM, Edward R. Cole wrote: >> >>Nice to have access to workplace equipment. Down on the treeless snow-covered >>Antarctic plain it becomes more than a nicety. His antenna has a >>few more lines than >>mine will but there is some resemblance to the image. > >Yes, of course it is VERY windy in Antarctica and the 6M8GJ is 43' long. > >I plan to raise the antenna to >>20-feet today and set the permanent guy wires. The 1-1/2-inch mast >>is a little light >>to support a 30-foot yagi but will have two nylon guide lines >>attached at each end so >>hoping that will survive high wind. > >Nylon stretches. I recommend the very affordable Kevlar lines or use Dacron. > >I have added 4-foot long diagonal braces to the >>boom back to a point 34 inches below the antenna boom, but the mast >>is guyed directly >>below that point so the antenna is not supported by anything other >>than guide ropes >>and mast. The original installation called for using a 3-inch dia. >>support mast. >> >>I am hoping the replacement section of LDF5-50 (7/8-inch) hardline >>will be good and >>get installed early next week when I expect delivery of new >>connectors. I should have >>a photo or two later today. >> >>73, Ed - KL7UW > >GL and VY 73, Lance >> >> >>73, Ed - KL7UW, WD2XSH/45 >>====================================== >>BP40IQ 500 KHz - 10-GHz www.kl7uw.com >>EME: 50-1.1kw?, 144-1.4kw, 432-100w, 1296-60w, 3400-? >>DUBUS Magazine USA Rep dubususa(a)gmail.com >>====================================== > > >-- >Lance Collister, W7GJ >(ex WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX, 3D2LR, 5W0GJ) >P.O. Box 73 >Frenchtown, MT 59834-0073 >USA >TEL: (406) 626-5728 >QTH: DN27ub >URL: http://www.bigskyspaces.com/w7gj >Windows Messenger: W7GJ(a)hotmail.com >Skype: lanceW7GJ >2m DXCC #11/6m DXCC #815 > >Interested in 6m EME? Ask me about subscribing to the Magic Band EME >email group, or just fill in the request box at the bottom of my web >page (above)! 73, Ed - KL7UW, WD2XSH/45 ====================================== BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 50-1.1kw?, 144-1.4kw, 432-100w, 1296-60w, 3400-? DUBUS Magazine USA Rep dubususa(a)gmail.com ======================================

11 years, 11 months

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Moon-net June 2011