Antenna Tuner Homebrew KK4WW & N4USA
See Appalachia where N4USA is located http://www.floydfolks.org
Follow us at http://www.twitter.com/n4usa
All the Tuner theory you want to know -
http://en.wikipedia.org/wiki/Antenna_tuner
All about Voltage Standing Wave Ratio SWR -
http://en.wikipedia.org/wiki/Standing_wave_ratio
This tuner was built by W4KQD 40 years ago or more. He retired in our area and had a station here for a number of years. His main transceivers were Drake Twins and other tube equipment. This tuner built with a plexiglass case should not be used. The RF field near this tuner with a KW input would be harmful. Years ago we did not really think much about this. It is a very nice example of homebrew equipment and from now on it will only be used to show folks a T type antenna tuner and not put to use.
David KK4WW has been Ham Radio operator http://tinyurl.com/7ym7s7c for more than 58 years and has worked in the electronics industry as engineer and teacher http://tinyurl.com/83mce63 during this time. Dave still enjoys radio and his collection of historical Microcomputers http://tinyurl.com/7hmuj3z along the way David has small collection of tuners.
Video produced by the LCF Group, ( We are on The Crooked Road Heritage Music Trail and the Round The Mountain Artisan and Craftsman Venue - great place to visit ) Floyd Virginia. The LCF Group consist of David Larsen KK4WW, Gaynell Larsen KK4WWW and Dee Wallace KG4VMI. We operate 'Chantilly Festival Farm' & 'Bugbook Historical Computer Museum' & are all radio amateurs - Directors of "The Foundation for Amateur International Radio Service" ( FAIRS) also located in Floyd Virginia. N4USA is the radio call for FAIRS and we have operated in Dominica as J79WW J79WWW J79VMI. We are members of " The Floyd Amateur Radio Society" FARS. The LCF Group ( 1-540-745-2322 ) The following have activities in Floyd County, Virginia http://www.bugbooks.info http://www.bugbooks.us , bugbook historical microcomputer museum , Bugbooks , http://www.bugbookseries.com http://www.bugbookcomputermuseum.com http://www.bugbook-computer-museum.com http://www.bugbook.org http://www.bugbook.us http://www.bugbook.net http://www.bugbooks.info http://www.bugbooks.us , bugbook historical microcomputer museum , bugbooks ,http://floydcountyonline.org , http://floydcountyva.org , http://floydcountyvirginia.org , land for sale by owner Floyd County Virginia, Floyds future, http://www.sustainfloyd.org owner financing FSBO , http://floydfolks.net , http://floydfolks.org , bugbook series Blue Parkway http://www.floydtourismdirertory.com http://www.stpierrewoodworking.com http://www.floydcountyvirginia.org Bill St Pierrehttp://www.virginiamountainland.Com http://www.lcfarticles.com http://http://va-mountainland.com http://www.floydcountyvirginia.org http://www.fairs.org http://www.floydfolks.org http://www.microcomputerhistorymuseum.com http://www.floydvisitorcenter.com http://www.floydvirginia.org , David Larsen Blacksburg Group, http://floydcounty-va.com ttp://www.floydfuture.com http://www.floydfuture.org http://www.lcfvideo.com h http://floydcountyvirginia.com , http://www.floydcounty.info , Bugbook historical microcomputer museum http://www.bugbookseries.com http://www.bugbookcomputermuseum.com http://www.bugbook-computer-museum.com http://www.bugbook.org http://www.bugbook.us http://www.bugbook.net
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Antenna Tuning coil - Handmadeby a7sorips782 views
LCF Group is in the Floyd, Virginia - an Appalachian community of farming, mountain music & artisans. LCF is developing 101A Chantilly Festival Farm our specialty is Bluegrass. Our Bugbook Historical Computer Museum is in town & we are on the "Blue Ridge Parkway" & " The Crooked Road - Virginia's Heritage Music Trail" . A lot of good things drop in and visit us sometime. Floyd is a big stop over on the Blue Ridge Parkway - Welcome to "Floyd" Dave KK4WW & N4USA Historical Computer Collector
lcfgroup 2 weeks ago
Hi - I am attending the "5th Annual Roanoke Virginia Regional Writers Conference at Hollins University" and now have no excuse for uninteresting responses to comments of my videos.
The first session was last night and go back tomorrow for whole day. It is very interesting and meeting some great folks. Thank you for your interest in the LCF Group Video Channel - Dave in Floyd Virginia
lcfgroup 4 weeks ago
I mention in this video that would not be advisable to use a tuner like this one with no RF shielding. We know now that RF fields can be very harmful to humans and animals. This tuner was made perhaps 40 or more years ago folks did not consider the possible dangers. This tuner with a Kilowatt of input would have very high local field - not to be used only for looking at it now. Dave KK4WW & N4USA
lcfgroup 4 weeks ago
@umajunkcollector Yes I sure agree with you - If one were to actually use it their would be a lot of radiating in the shack.. I DO NOT RECOMMEND USING THIS UNIT OR ANY OTHER IN UNSHIELDED CASE . It is nice to see this vintage homebrew unit -- I do have an even bigger until made by the same ham and it is in enclosed case. I will be doing a video on it. Tuners do help with max power transfer from transmitter to the feed line - and as you say - save the finals. Dave
lcfgroup 1 month ago
yeppirs this would not be a good way to radiate RF FROM THE TUNER. Tuners are NOT antennaes! They're main purpose is to protect the finals from crappy feedline and bad antennaes. It's much cheaper and better to make the antenna as broadbanded as possible, and use higher quality feedline. I feel it is better to place an external auto- tuner at the antenna too.
umajunkcollector 1 month ago