Re: [Elecraft] Twin Lead feedline
I have put 300 watts from a single 813 grounded grid amp into a doublet made using 300 ohm twin lead. No problem. de Joe, aa4nn - Original Message - From: Thom LaCosta [EMAIL PROTECTED] To: Elecraft@mailman.qth.net Sent: Tuesday, August 14, 2007 7:26 AM Subject: [Elecraft] Twin Lead feedline It's been years since I melted 300 ohm twin lead... Can I use it for a 44 foot each side of center doublet at 100 watts out? I can't find any other open wire feedline locally, and I need to get something up in the airI keep on walking into the slinky that runs down my hallway. I'm thinking at 5 watts it will pass...just not sure what will happen at 100 watts. Thanks 73 k3hrn Thom,EIEIO Email, Internet, Electronic Information Officer www.baltimorehon.com/Home of the Baltimore Lexicon www.tlchost.net/hosting/ Web Hosting as low as 3.49/month ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Twin Lead feedline
Thom There are various grades of 300 ohm twinlead. Some are very cheap and have pretty skimpy conductors. Some are good quality. There is/was at least one version that was suitable for transmitting (power level not stated that I can recall). If you have some of the good quality stuff, you can probably do 100w just fine. I'd watch out for the skimpy stuff, though. Good luck and 73 Bob N6WG - Original Message - From: Thom LaCosta [EMAIL PROTECTED] To: Elecraft@mailman.qth.net Sent: Tuesday, August 14, 2007 4:26 AM Subject: [Elecraft] Twin Lead feedline It's been years since I melted 300 ohm twin lead... Can I use it for a 44 foot each side of center doublet at 100 watts out? I can't find any other open wire feedline locally, and I need to get something up in the airI keep on walking into the slinky that runs down my hallway. I'm thinking at 5 watts it will pass...just not sure what will happen at 100 watts. Thanks 73 k3hrn Thom,EIEIO Email, Internet, Electronic Information Officer www.baltimorehon.com/Home of the Baltimore Lexicon www.tlchost.net/hosting/ Web Hosting as low as 3.49/month ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Twin Lead feedline
I have been using TruValue twin lead at $14/100 feet for the past 4 years on both my G5RV and my 40 meter loop. Works just fine. Best bargain around. Since I only need 40 feet on either antenna, if it goes bad, I just use the other half of what is left with some to spare. Jozef WB2MIC PS. The antenna wire is leftover electric fence wire now over 22 years old. Cost per antenna per year is quite low. :) Robert Tellefsen wrote: Thom There are various grades of 300 ohm twinlead. Some are very cheap and have pretty skimpy conductors. Some are good quality. There is/was at least one version that was suitable for transmitting (power level not stated that I can recall). If you have some of the good quality stuff, you can probably do 100w just fine. I'd watch out for the skimpy stuff, though. Good luck and 73 Bob N6WG - Original Message - From: Thom LaCosta [EMAIL PROTECTED] To: Elecraft@mailman.qth.net Sent: Tuesday, August 14, 2007 4:26 AM Subject: [Elecraft] Twin Lead feedline It's been years since I melted 300 ohm twin lead... Can I use it for a 44 foot each side of center doublet at 100 watts out? I can't find any other open wire feedline locally, and I need to get something up in the airI keep on walking into the slinky that runs down my hallway. I'm thinking at 5 watts it will pass...just not sure what will happen at 100 watts. Thanks 73 k3hrn Thom,EIEIO Email, Internet, Electronic Information Officer www.baltimorehon.com/Home of the Baltimore Lexicon www.tlchost.net/hosting/ Web Hosting as low as 3.49/month ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Twin Lead feedline
I've just re-read your question. So, the twin lead is not for the feeder, it's for the arms of the doublet, or possibly both. I presume to widen the frequency response. There are some interesting ideas for using ribbon as antennas. If it's the pale pink variety, the only thing I would advise is to make sure you water-proof the cut ends because it will drink water by capillary action and rapidly rot the copper inside. This happened to me many years ago. If it's the black ladder line, I would say it is quite heavy compared to single wires. Otherwise I see no particular problems. David G3UNA - Original Message - From: Jozef Hand-Boniakowski [EMAIL PROTECTED] To: Robert Tellefsen [EMAIL PROTECTED] Cc: Elecraft@mailman.qth.net Sent: Tuesday, August 14, 2007 5:02 PM Subject: Re: [Elecraft] Twin Lead feedline I have been using TruValue twin lead at $14/100 feet for the past 4 years on both my G5RV and my 40 meter loop. Works just fine. Best bargain around. Since I only need 40 feet on either antenna, if it goes bad, I just use the other half of what is left with some to spare. Jozef WB2MIC PS. The antenna wire is leftover electric fence wire now over 22 years old. Cost per antenna per year is quite low. :) Robert Tellefsen wrote: Thom There are various grades of 300 ohm twinlead. Some are very cheap and have pretty skimpy conductors. Some are good quality. There is/was at least one version that was suitable for transmitting (power level not stated that I can recall). If you have some of the good quality stuff, you can probably do 100w just fine. I'd watch out for the skimpy stuff, though. Good luck and 73 Bob N6WG - Original Message - From: Thom LaCosta [EMAIL PROTECTED] To: Elecraft@mailman.qth.net Sent: Tuesday, August 14, 2007 4:26 AM Subject: [Elecraft] Twin Lead feedline It's been years since I melted 300 ohm twin lead... Can I use it for a 44 foot each side of center doublet at 100 watts out? I can't find any other open wire feedline locally, and I need to get something up in the airI keep on walking into the slinky that runs down my hallway. I'm thinking at 5 watts it will pass...just not sure what will happen at 100 watts. Thanks 73 k3hrn Thom,EIEIO Email, Internet, Electronic Information Officer www.baltimorehon.com/Home of the Baltimore Lexicon www.tlchost.net/hosting/ Web Hosting as low as 3.49/month ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
