Re: [Repeater-Builder] is a repeater needed
Houston has a wealth of repeaters but nothing wrong with gaining the knowledge(that's the main reason I built one). I'm in Houston too, feel free to give me a call, or email and I'll point you in the right direction. I might be interested in your location since mine is in need of a better location. You can find me on 444.600, or mine at 443.525+136.5 tone or kirk @ ad5ou.com or 832-865-3511 - Original Message - From: Lane lane.galle...@yahoo.com To: Repeater-Builder@yahoogroups.com Sent: Friday, May 28, 2010 3:01 PM Subject: [Repeater-Builder] is a repeater needed Hi all, I've been interested in building a repeater for a while now, but before I do, I guess the first step is in knowing whether or not a repeater is needed for my area. I live in Houston and have an excellent area for putting up a repeater *if* one is needed, but how do I go about finding out if one would be useful to others and on what frequencies. There are lots of repeaters here in Houston and I'd hate to saturate or further complicate anything if that would be the case. Any help, suggestions, advice much appreciated. Yahoo! Groups Links
Re: [Repeater-Builder] Re: Copper pipe rather than 2/0 copper wire
Not that I think copper pipe is a good alternative to strap, but Gary's math is slightly off. If you are saying 2 inch strap has 4 inches of surface area by counting both sides of the strap, then you need to count both sides of the pipe. Inside and outside surfaces of a pipe equal to 5/8OD would be very close to the same surface area of a 2 inch strap of the same thickness. Might be ok for grounding a temporary setup or for ground radials on an HF antenna but I wouldn't want to gamble on insurance covering a station using flattened copper pipe as a grounding solution. - Original Message - From: Gary Schafer To: Repeater-Builder@yahoogroups.com Sent: Wednesday, March 17, 2010 11:11 AM Subject: RE: [Repeater-Builder] Re: Copper pipe rather than 2/0 copper wire -- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jack Davis Sent: Wednesday, March 17, 2010 1:15 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Copper pipe rather than 2/0 copper wire Re: Copper pipe rather than 2/0 copper wire Posted by: Eric Lemmon wb6...@verizon.net wb6fly Tue Mar 16, 2010 5:55 pm (PDT) Jesse, Not a good idea. Both NFPA 70 (the National Electrical Code) and NFPA 780 (the Lightning Protection Code) have strict requirements for wire sizes and connection methods. Neither grounding systems nor lightning protection systems may use a soldered connection in the circuit. Perhaps your best course of action is to understand the Code requirements, and construct your system accordingly. Keep in mind the fact that your insurance underwriter may deny any and all claims for damages due to lightning, if your system was constructed in a manner inconsistent with the applicable codes. 73, Eric Lemmon WB6FLY You don't need any solder joints with type K or L soft copper. The material comes is 60 or 100 foot rolls and you just flatten the ends and drill holes for mounting bolts and star washers. ½ inch soft copper is actually 5/8 inch OD and makes a great conductor. The material comes in size up to 2 inch but that gets pretty expensive. This pipe is designed to be buried in the ground so you can be assured it will stand up just fine outdoors. One caution is to anchor it down, swinging in the wind will cause it to break due to repeated flexing. All the normal bend radius for electrical conductors should be observed as lightning does not like to make sharp corners. Jack K6YC 5/8 OD gives you 1.96 inches (5/8 x 3.14) of surface area. 1 inch copper strap gives 2 inches of surface area. 2 inch copper strap gives you 4 inches surface area. Copper strap should be less expensive than copper tubing.__,_._,__ Why would you use copper tubing? 73 Gary K4FMX
Re: [Repeater-Builder] newbie looking for info
Since everyone is giving you the advise and links to more advanced subjects of repeater building I'll list the overly simplified basics. List of equipment needed: Receiver Transmitter (this might be 2 parts-and exciter and a power amplifier) Controller (to tell the transmitter when to transmit) Duplexer (if you want to use one antenna and/or save space) Antenna (or two if you don't use a duplexer-one for TX, one for RX) Antenna feedline Various cables to connect everything together Power to run the equipment Rules you have to abide by: Laws of physics Laws of your governing body The links and suggestions provided help explain all of the above and somewhere on the repeater builder pages there is a page which describes the experiences of a person's first time building a repeater. The how's and why's of building a repeater especially a good repeater isn't as easy to write in a single email/web page/etc. There are a LOT of ways to build a repeater and every variable will have a different effect on the finished product. The biggest point to remember if you are thinking of building a repeater is it will take time, money and knowledge. The more you have of any of those things, the less you'll need of the others. - Original Message - From: tetrault mdtetra...@gmail.com To: Repeater-Builder@yahoogroups.com Sent: Monday, January 25, 2010 1:19 PM Subject: [Repeater-Builder] newbie looking for info Where would I find a book or list of items I would need to build a repeater. Is there a list of parts and rules etc? I didn't see anything appropriate in the files section. Tnx, Mark AA1OV
[Repeater-Builder] Looking for Kenwood TKR-820 programming/tuning
I'm trying to get my Kenwood TKR-820 tuned and programmed to my 443mhz repeater pair. If anyone on list can do this for a reasonable amount please email me direct at k...@ad5ou.com Equipment is located in Houston, TX so the closer the better for shipping. Thanks Kirk
