--------------- FIDO MESSAGE AREA==> TOPIC: 188 HAM TECH Ref: E1U00006 Date: 01/24/97 From: WAYNE SAROSI Time: 07:19pm \/To: STAN BLACK (Read 4 times) Subj: dual-band j-pole In a message to Wayne Sarosi <22 Jan 97 22:55> Stan Black wrote: SB> Hi Wayne! I'm trying to determine the SB> measurements for a dual-band j-pole made SB> out of 300 ohm twin lead. I want to SB> enclose it in a length of PVC to protect SB> it from the weather. I'm going to mount SB> it at 60 feet. Thanks! 73 de Stan SB> KC5BFA I believe my asst. moderator, Chris Boone has those plans. Drop him a line. I don't have them. But there is a set of plans out there. No sense of reinventing the wheel. They have been posted several times before. As far as suspending it in a piece of PVC, use sched 40, paint the pvc with something to block the uv rays. Cap the top but before you put the j-pole inside, screw in a ss eye hook to attach the antenna to. Test the antenna to make sure nothing has changed. Drill a hole near the eye hook. After you have made your connections and run you coax out the bottom or where you wish, seal the pvc cap on top and cap the bottom. Fill with spray foam. DON'T over fill because that stuff expands fast. This will protect the antenna for a very long time. Paint every two years. -WS --- * Origin: KB4YLY Moderator (1:374/73.2) --------------- FIDO MESSAGE AREA==> TOPIC: 188 HAM TECH Ref: E1U00007 Date: 01/24/97 From: WAYNE SAROSI Time: 07:33pm \/To: RALPH MOWERY (Read 4 times) Subj: Halo Ants. In a message to Wayne Sarosi <19 Jan 97 22:23> Ralph Mowery wrote: >WS> LR> BTW...ever seen an antenna which looks like three delta-loops on >WS> LR> the same horizontal plane? It kind of resembles a 3-bladed >WS> LR> propeller with very wide blades, only made of wire and not solid, >WS> LR> of course! >WS>Can't say that I have seen one. I've seen two bow ties, one vertical >WS>one horizontal and phased together but that would be four. >WS>What band is it used on? RM> It is commonly called a Big Wheel. Usually used on 2 meters and higher. RM> Made out of 3 loops 1 wave length long. They were mounted to give an RM> omnidirectional horizontal signal. Sometimes stacked up a pole in pairs RM> or 4s for more gain. A big wheel? The name sounds familar but I never saw one. It reminds me of some of the names given to CB antennas. Interesting. Do you have any plans? Is that a total length of one wave or three loops of one wave each? Sounds interesting enough. If you have anything more on it there are two of us interested. -WS --- * Origin: KB4YLY Moderator (1:374/73.2) --------------- FIDO MESSAGE AREA==> TOPIC: 188 HAM TECH Ref: E1U00008 Date: 01/24/97 From: WAYNE SAROSI Time: 07:44pm \/To: ROB DENNIS (Read 4 times) Subj: Twin???? In a message to Wayne Sarosi <23 Jan 97 14:55> Rob Dennis wrote: > WS> In a message to Ke4Ooo <19 Jan 97 19:47> Wayne Sarosi wrote: > WS>> If you have pbs you may want to catch the computer cronicle this week > WS>> j > WS>> jmetz@microfone.net > WS> Yo Jmetz, use your name not mine! > WS> + Origin: KB4YLY Moderator (1:374/73.2) RD> I must have missed something here... RD> Is there someone else out there with your name Wayne ? RD> Wouldn't be the first time FIDO has a few `twins' floating around. Naw. I'm the only Wayne Sarosi in the world. Already checked. looks like a system puked somewhere. -WS --- * Origin: KB4YLY Moderator (1:374/73.2) --------------- FIDO MESSAGE AREA==> TOPIC: 188 HAM TECH Ref: E1U00009 Date: 01/24/97 From: TEDD DODA Time: 07:45am \/To: MARTIN CAMPBELL (Read 4 times) Subj: transverters Greetings Martin: Replying to a message of Martin Campbell to all: MC> Hi everyone. Can anyone give me the address of any places where MC> I can get a 6m transverter that works with a 10m hf rig? Kits MC> or assembled units, but must be reasonable on price! Not like MC> some places that want more than I payed for the hf rig. Thanks. Give Manfred Zielinski a call (fax) @ 1-519-664-3082. He's in St Jacobs, Ontario, Canada, and owns MAS Enterprises. I've been using one of his 10 meter to 6 meter transverters for about 5 years and have *NEVER* had a problem with it! Output is 6 watts on 6m and has an adjustable input attenuator. I'm using an old HR2510 as the 10 meter IF. Very easy to modify for low power output (max input to the transverter is 1 watt...I think?) Hope that helps....... Tedd [Team OS/2, in Canada] e-mail lazeraud@sentex.net packet va3sed@va3sed voice call ve3tjd --- FleetStreet 1.14 NR * Origin: The Home of Lazer (1:221/1406.2) --------------- FIDO MESSAGE AREA==> TOPIC: 188 HAM TECH Ref: E1U00010 Date: 01/24/97 From: TEDD DODA Time: 07:53am \/To: TERRY BENDELL (Read 4 times) Subj: 6M NUT... Greetings Terry: Replying to a message of Terry Bendell to Tom Walker: TB> why not build a 10 meter <> 6 transverter and use your HF rig, it TB> has ten meters don't it? or if you like leave a message in the TB> Ham Sale echo, I'm sure theres LOTS of used 2510's forsale TB> there, likely you could trade them for a Hand-Held or Similar FM TB> device. That way you get on the Six Meter Repeaters as well. Not quite true as the unmodified 2510 doesn't have repeater shifts. The only way to get shifts is to upgrade to a Chipswitch, or get a 2600. I've been using a 2510 along with a MAS transverter for 5 years and haven't heard anyone I couldn't work! 73, de Tedd [Team OS/2, in Canada] e-mail lazeraud@sentex.net packet va3sed@va3sed --- FleetStreet 1.14 NR * Origin: The Home of Lazer (1:221/1406.2) --------------- FIDO MESSAGE AREA==> TOPIC: 188 HAM TECH Ref: E1U00011 Date: 01/24/97 From: STAN BLACK Time: 3:45 am \/To: ROB DENNIS (Read 4 times) Subj: Re: dual-band j-pole Hey Rob! Thanks for the j-pole dimensions!! Will it affect it if it's inside the pvc pipe? I've been told to shorten it by 5%. What say ye? Thanks es 3 de Stan kc5bfa --- GEcho/386 1.11+ * Origin: Great Beta Video System For Sale, Includes Movie (1:392/11) --------------- FIDO MESSAGE AREA==> TOPIC: 188 HAM TECH Ref: E1V00000 Date: 01/25/97 From: RAY WADE Time: 05:01pm \/To: ALVIN WILSON (Read 4 times) Subj: Beginner On (24 Jan 97) Alvin Wilson wrote to Ray Wade... AW> The bandwidth of an SSB transmission is about 1/2 the bandwidth AW> of an AM transmission (actually slightly less than 1/2 the bandwidth AW> due to filtering). So how wide did I say an AM signal is? ... ... I like children... but I don't think I could eat a whole one. --- PPoint 2.00 * Origin: K5JCM, Tulsa OK (1:170/600.2) --------------- FIDO MESSAGE AREA==> TOPIC: 188 HAM TECH Ref: E1V00001 Date: 01/24/97 From: NASSER AL-THEKAIR Time: 08:55pm \/To: DAVE FRANKS (Read 4 times) Subj: Beginner DF>.MSGID: 2:542/600 00191765 DF>NA>Nice,I'd like you to introduce me to them,as a new arrival. DF>Keep your eyes open is the best I can advise, they show up now and again. DF>In the meantime whoever is here seems willing to chat. Sure I know they are, but I was hoping to meet some. Best Regards. --- OLXWin 1.00b This isn't a tag line. It just looks like one. * Origin: The Gulf BBS (2:542/200) --------------- FIDO MESSAGE AREA==> TOPIC: 188 HAM TECH Ref: E1V00002 Date: 01/25/97 From: TERRY BENDELL Time: 11:24pm \/To: TEDD DODA (Read 4 times) Subj: 6M NUT... > Not quite true as the unmodified 2510 doesn't have repeater shifts. > The only way to get shifts is to upgrade to a Chipswitch, or get a > 2600. > > I've been using a 2510 along with a MAS transverter for 5 years and > haven't heard anyone I couldn't work! Why not do it on the cheap? I did, When I built my transverter I simply provided a three way switch to switch it between standard 6 meter repeater shifts, easy on rx its in the simplex position on transmit the thing switches in the shift crystal. Cost maybe an extra $19. Why waste a perfectly good IF Radio and spend $100 or more to upgrade it when such a simple solution is in order? 73...Terry --- FLAME v1.1 * Origin: Big Sky BBS 705-444-8565/428-3677 (1:252/502) --------------- FIDO MESSAGE AREA==> TOPIC: 188 HAM TECH Ref: E1W00000 Date: 01/25/97 From: CRAIG SUTTON Time: 12:48am \/To: ROY WITT (Read 4 times) Subj: passive rebroadcast RW> appear to be blank signs to reflect (and redirect) their signals. RW> Totally passive, meaning no power requirement at all. A smaller size RW> reflector could possibly be "aimed" to get what you want. RW> Sometimes that's not even required...I lived in a valley surrounded by RW> high hills and 2800ft mountains...by pointing my "suburban" antenna toward RW> the west at that 2800ft mountain, I recieved tv signals originating from RW> the southeast.. I am surrounded by mountains as well, the only signal can be received on top of the mountain :( RW> Pointing the antenna at the tv signal got the station, but with two or RW> three ghost signals, which lead me to a search for one of those ghost RW> signals.. well i guess a ghosty signal could be better than none at all. RW> I often thought of placing an antenna on a nearby hill and doing just what RW> Craig has asked...I don't think his passive idea would work as well as a RW> transverter. Well i got the idea from an Australian magazine, the article said that due to the extreme signal loss its only good for short distances. Have to work out how to connect the two aerials though. At this stage i think the masthead amp is connected as usual, the downlead going into the power unit by the set and the lead which comes out and plugs into the antenna socket at the tv set should run straight to the balun of the other aerial?? so the amplified signal isn't being fed to the set its going straight into the broadcast aerial?? Now the tricky challenging bit for the maths experts out there. Say at the top of the mountain the signals very good on each of the 4 vhf channels the TV aerial is designed to recieve (lets say they are equal strength for the sake of things). Signal is fed to masthead amplifier (34db gain) and output to aerial thats identical to the receive aerial for rebroadcast. Anyone know what sort of power the rebroadcast aerial would put out? I know it depends on the aerials so lets say the aerials give 8db of gain on each of the channels its designed for. --- Xenolink 1.984, XEmacs 1.4b1 * Origin: BitStream BBS - Nelson, New Zealand +64-3-548-5321 (3:771/850)