[Repeater-Builder] Re: DC Ground Lightning Protection / Concrete Electrode
Please take note that there is a difference between grounding an electrical system, and grounding for lightning. The two situations are quite different. For designing and installing a lightning protection system see NFPA 780-250. The NEC (NFPA 70) does not address lighting protection other than when it is installed beside an electrical system ground. I am a certified electrical inspector (ICC) and electrical contractor (NM CA). In the southwest lightning protection is a BIG thing! Wes ARRL Technical Specialist AE6ZM VE7ELE Lincoln, CA CM98iv Placer County ARES
[Repeater-Builder] Re: Sinclair Dual Circulator Help
The Sinclair document on RB states the retuning works over a bandwidth of 2-4 MHz. My guess is that the narrower range is for the lowest frequencies (132 MHz), and the wider for the higher (800 MHz). The shift from 142 to 145 may not be possible. Please keep us informed of the end result! Wes ARRL Technical Specialist AE6ZM VE7ELE Lincoln, CA CM98iv Placer County ARES
RE: [Repeater-Builder] Some East and West Coast Repeaters - Mandate to 5 Watts Max
Lots of gossip on this so far, but no word from the military or the FCC. Responsible groups such as ARRL should be just that, responsible. Rumor mongers just create panic, and who needs that. Wes AE6ZM ( 10 miles from Beale AFB, home of the U2) _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of skipp025 Sent: Sunday, May 13, 2007 2:05 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Some East and West Coast Repeaters - Mandate to 5 Watts Max May 13, 2007 Word of a possible mandate on UHF 440-450 Repeater operation. Power output and/or erp restricted to 5 watts. Some of you don't know about the potential to shut down or seriously limit the power level of UHF 440-450 FM Repeaters considered within the operational area of at least two Military Pave Paws Radar Systems. http://en.wikipedia http://en.wikipedia.org/wiki/PAVE_PAWS .org/wiki/PAVE_PAWS Lastest behind the scenes word is a possible/probable mandate to reduce UHF Repeater output levels to 5 watts within a 150 mile radius of each location. If your repeater call-sign is on a previously mentioned repeater list you might receive some type of formal notification regarding a forced power reduction. Regards, s.
RE: [Repeater-Builder] Re: Motorola Board identity
Eric, thanks very much! I can look for some documentation for these, and perhaps work them into some of my radio-repeater-IRLP node projects. Good call on the GE exciter board, that is exactly what it appears like, now that I have some insight. Will make a nice 2M exciter, if I can get it down there. GE makes very nice looking boards. I have a Moto reed-less tone board that outperforms the reed type, so no big need for the decoder board. Neat parts, tho. I have a couple Vibrasponder boards with elements, should be fun to play with! Thanks again. Wes _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Eric Lemmon Sent: Thursday, May 10, 2007 10:06 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: Motorola Board identity Wes, I can help with some of the numbers. The TRE1201 is listed in MOL as RCVR 4 FREQ 25KH and is cancelled. The TLN4294 is a MICOR PL Tone Decoder board. The 19D402308G8 is listed in my GE microfiche file as HB UHF MASTR PRO EXCITER and is described as intended for 470-512 MHz, 30 and 60 watt transmitters 4ET59H30 and 4ET60H30-41. It is 1 frequency, with Channel Guard. LBI-4432 covers this exciter. I am not familiar with GE Mastr Pro equipment, but I suspect that this exciter actually generates a VHF carrier which is then run through a tripler stage to get a UHF drive signal to the PA. That would account for your 158.925 MHz crystal, which would result in a TX of 476.775 MHz. However, Part 90 of the FCC Rules does list 158.925 MHz as a valid Public Safety frequency. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com [mailto:Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com] On Behalf Of Wes Bunker Sent: Wednesday, May 09, 2007 9:32 PM To: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com Subject: RE: [Repeater-Builder] Re: Motorola Board identity I do not have pix, but here are some board numbers: TLN6733 appears to be an audio board TRE1201 appears to be a receiver HLF 4068B appears to be a 800 mhz txcvr TLN 4294 tone board ?? TLE 8051 UHF?? it has a xtal mid-board marked 11700.00 and soldered in. TLD 8620 ( perhaps 8820) with a cylindrical part marked PH775. tone board?? I also have a TX board that appears to be GE marked D402308G8 REV. C with a xtal marked 158.925. Locating a schematic will assist in figuring out power connections. Tons of fun!!! Hope someone can help identifying these boards, then I can possibly identify some of the components. Wes From: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com [mailto:Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com] On Behalf Of skipp025 Sent: Monday, May 07, 2007 11:08 AM To: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com Subject: [Repeater-Builder] Re: Motorola Board identity The most practical way to ID various Motorola boards might be to snap a picture of the lot and place the picture on the web somewhere. Then ask group members here to view the on-line picture to see if they can id the parts... cheers, skipp wesbflyer [EMAIL PROTECTED] wrote: Is there a way I can identify Mot boards from the ink-stamped number on the board? I have inherited several boards I need to figure out. Most appear to be RX boards, couple small accessory boards.
RE: [Repeater-Builder] Re: Motorola Board identity
I do not have pix, but here are some board numbers: TLN6733appears to be an audio board TRE1201appears to be a receiver HLF 4068Bappears to be a 800 mhz txcvr TLN 4294tone board ?? TLE 8051UHF?? it has a xtal mid-board marked 11700.00 and soldered in. TLD 8620 ( perhaps 8820) with a cylindrical part marked PH775. tone board?? I also have a TX board that appears to be GE marked D402308G8 REV. C with a xtal marked 158.925. Locating a schematic will assist in figuring out power connections. Tons of fun!!! Hope someone can help identifying these boards, then I can possibly identify some of the components. Wes _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of skipp025 Sent: Monday, May 07, 2007 11:08 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Motorola Board identity The most practical way to ID various Motorola boards might be to snap a picture of the lot and place the picture on the web somewhere. Then ask group members here to view the on-line picture to see if they can id the parts... cheers, skipp wesbflyer [EMAIL PROTECTED] wrote: Is there a way I can identify Mot boards from the ink-stamped number on the board? I have inherited several boards I need to figure out. Most appear to be RX boards, couple small accessory boards.
