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eHam Forums / Antennas and Towers and more / RE: Yaesu rotator cable connectors
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on: August 21, 2011, 11:38:40 PM
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yes, gentlemen, I bought it new from a dealer in Europe...Despite what written in the manual the box had a small letter included saying that the package does not include the cable and/or connectors:) Thanks for all who advised, now at least I know the connector's P/N and will buy them separately. 73! Ilya
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eHam Forums / Antennas and Towers and more / RE: Yaesu rotator cable connectors
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on: August 16, 2011, 11:35:07 PM
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Ilya - 4Z1UF
I have available the 6 pin connector (w/pins), but not the round connector. However, it can be obtained at Kinetic Technologies of Ohio, LLC PH: 937-349-7361 FX: 937-349-8205 steve@kineticllc I have an ad posted for the Yaesu rotor connectors here on eHam under my call, W3FRG
Gl in your search, Tom
Tom, unfortunately I did not find your ad. Also, could you please give me the P/N for round connector so I could find it on Kinetic web site? 73! Ilya
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eHam Forums / Elmers / RE: Differential preamp for loop antenna
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on: August 14, 2011, 12:42:28 AM
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Thanks Peter. Actually I didn't think about protecting the LNA from inducted voltage across the loop. Actually my loops a planned not to be "tuned", but anyhow...Disconnecting the the supply voltage to the preamp is initial idea but I shall check carefully what the OpAmp (or any other LNA) can withstand even being un-powered. 73! Ilya 4Z1UF
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eHam Forums / Antennas and Towers and more / RE: Yaesu rotator cable connectors
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on: August 14, 2011, 12:37:24 AM
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Don, thanks for idea. Being quite "far from civilization" I didn't think to contact them but now sent them an e-mail and will wait for the answer. Buying from R&L is really bit expensive, especially considering shipping charges to Israel and local taxes on whole bundle what will more than double the price. 73! Ilya 4Z1UF
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eHam Forums / Antennas and Towers and more / Yaesu rotator cable connectors
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on: August 13, 2011, 09:04:44 AM
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My recently purchased G-2800DXA does not have either complete cable (as per manual) nor connectors for rotator/controller. Where/how one can obtain complete cable or at least two connectors for it? The manual does not show even the P/N for them. Will appreciate any advice. 73! Ilya 4Z1UF
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eHam Forums / Elmers / Differential preamp for loop antenna
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on: August 13, 2011, 08:38:08 AM
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I'm trying to study deeper- and even try!  - the receiving loop antennas for low bands. All of them requires low noise amplifiers. All recommendations that I found on the web are for such LNA's placed close to the transceiver. It means matching balun between the loop and feed line (coax or twisted pair) running down, then struggling with common mode noise on the feed line and after that- amplification of signals +noise by LNA. The question: did anyone try to place the differential (operational) amplifier at the antenna side, eliminating the need of balun and not amplifying the unwanted noise? Something similar to ADA4899-1 or AD8432? I received this advice from antenna pro and wonder why this solution is not popular despite it sounds very logical. 73! Ilya 4Z1UF
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eHam Forums / Misc / noisy tuner in FTDX-5000
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on: July 21, 2011, 03:02:01 AM
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Just put on the table brand new FTDX-5000. The ATU during the tuning process is quite noisy (rumbling noise). Am I an only one experiencing it?
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eHam Forums / Antennas and Towers and more / 160/80 meters end-fed antenna
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on: April 04, 2006, 12:36:42 PM
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Hi Dale! Wow! Thanks a lot! You explained even more than I expected:) I have any capacitors for such a job, I underestand that they should "fit" my homebrew PA with 1kW... Again- thanks a lot. See you on 80/160 very soon:) 73! ILYA de 4Z1UF
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eHam Forums / Antennas and Towers and more / 160/80 meters end-fed antenna
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on: April 04, 2006, 01:52:17 AM
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Hi Steve!WB2WIK I live on the top floor of the 10 stories, tower type building:) So there is actually ~3 meters line-of-site from the upper antenna end (feed point) to my table in the shack. I can send a picture to your private e-mail, if you'll let me:) 73! Ilya
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eHam Forums / Antennas and Towers and more / 160/80 meters end-fed antenna
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on: April 04, 2006, 01:44:45 AM
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Hi Dale! Thanks a lot for your answer. "parallel-tuned tank circuit with the coax either tapped up onto the coil or link coupled". Could you explain this bit more deeply?
Also, what are expected volumes of coil and capacitor for L-shaped match? I think I'll go for this configuration. Since I have beems for 40~10 meters I don't need really "multiple" bands, other than 80 and 160. 73! ILYA
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eHam Forums / Antennas and Towers and more / 160/80 meters end-fed antenna
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on: April 03, 2006, 07:41:17 AM
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Hi guys! I found a lot of articles but nothing concrete, mainly theory... Here is the set-up: 82 meters of wire, fed from the upper end (about 35 meters high), running at some angle downwards, the lower end about 10 meters above the ground. So, I have app. full wave length for 80 and half-wave for 160. I'm dreeming to make it work on both bands and to feed by coax (need not more than 10m to get to the shack).
1) How the matching circuit (at the feed point) should look like?
2)Is it necessary to trim the wire lenght to the resonance at one of the bands?
3) Am i right that the good radials system is not essential for this type of antenna? Actaully, I have a large "mirrors" for solar water heating very close to the feed point, sized about 10x10 meters, made of aluminum/copper; in addition they are electrically grounded.
Will appreciate your response and time. 73! ILYA de 4Z1UF
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eHam Forums / Antennas and Towers and more / Yaesu G1000 conversion to 220V
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on: December 07, 2005, 03:23:13 AM
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Hi guys! Could somebody advise please how to change the connections inside the standard G1000 controller in order to use it with 220V? The manufacturer claims that this is a buit in option, but on the device clearly written 110V ONLY (!) and no explanation in the manual. Thanks in advance. 73! ILYA de 4Z1UF
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