JohnE

rough portable coverage based on 3dBd antenna 25W w/1.5 dB line loss at 8M high http://i1105.photobucket.com/albums/h358/erscom/maps/steve_zpsdc0dcc5e.jpg

I will second Quarterwave on this. I have 3 machines and have helped a few other do theirs and we all have significant $$$$ in them. our time, our money, our discretion, to be blunt about it. if you read through the threads for my machines you will see i have shut mine several times for people "playing" w/them.

https://forums.mygmrs.com/topic/194-any-experience-with-these-setups/?p=2637

yes

horizontal 30' vertical or inverted vertical ~10'

https://forums.mygmrs.com/topic/292-duplexer-tuning-distance-without-duplexer/

that's the reason its in PVC

both the 575 and 650 machines will be shut down from 10/28-11/4.

found this to supplement the trunking question http://www.signalharbor.com/ttt/00may/index.html and for the record LTR data fits into the 95.181 (g) rule.

some additions http://i1105.photobucket.com/albums/h358/erscom/off%20grid%20site/DSCN0062_zps90b743f2.jpg http://i1105.photobucket.com/albums/h358/erscom/off%20grid%20site/DSCN0061_zps21d770f5.jpg http://i1105.photobucket.com/albums/h358/erscom/off%20grid%20site/DSCN0057_zpsda67897f.jpg port entry, ground rod and ground buss http://i1105.photobucket.com/albums/h358/erscom/off%20grid%20site/DSCN0055_zps4b24358a.jpg batteries wired and charging http://i1105.photobucket.com/albums/h358/erscom/off%20grid%20site/DSCN0063_zps5dff42a9.jpg hard line protected from anything that may crush it. still need to be secured a little better though. still need some minor hardware and items to secure the shack better.

I can totally relate.

lot of things can be done time and $$$$

that means in simple terms no phone patch the other refers to remote control of the radio over leased lines other wise known as a radio tie line. tie lines are used in a voting system but as stated previously it would be cost prohibitive for the average person just putting up a repeater.

the rule as I understand it means no phone patch in a nutshell.

should be a fun weekend to be on the radio http://spaceweather.com/ http://hosted.ap.org/dynamic/stories/U/US_SCI_SOLAR_STORM?SITE=AP&SECTION=HOME&TEMPLATE=DEFAULT&CTIME=2014-09-10-17-56-39

ya killin' me.

I didn't get too many pics of the process. the gentleman who did the climbing did all the work from trimming to the mounting of the antenna. I found it very difficult not being the one up in the air doing the work. it is also the first time I have ever hoisted an antenna whole w/cable attached to it. on a side note I was amazed at how little the tree moved compared to a tower. anyway pics http://i1105.photobucket.com/albums/h358/erscom/off%20grid%20site/DSCN0046_zpsb5f5e85c.jpg chinese finger to hoist the cable http://i1105.photobucket.com/albums/h358/erscom/off%20grid%20site/DSCN0047_zps897aaae5.jpg ground bar and poly-phaser http://i1105.photobucket.com/albums/h358/erscom/off%20grid%20site/DSCN0050_zps2bdbfa05.jpg all put together before the hoist http://i1105.photobucket.com/albums/h358/erscom/off%20grid%20site/DSCN0051_zpsd3ea7288.jpg cable stretched out http://i1105.photobucket.com/albums/h358/erscom/off%20grid%20site/DSCN0048_zps5c4642aa.jpg top chopped http://i1105.photobucket.com/albums/h358/erscom/off%20grid%20site/DSCN0049_zpsfb5a1bf8.jpg debris I used a test channel at 100W to check the SWR reflected power was 0.8W. I expect pretty good coverage out of this. will do further field testing w/genset and the repeater over the next couple of weeks.

antenna was mounted into the tree yesterday. man what a job, took 8hrs to trim top and mount , pull and secure the cable. will post what pics I have later. I was pretty on about the height measured from base to the bottom hole for the mount was 74' , +10 for the pipe and the antenna is 78" over that.

you can "getaway" w/about 3/4 Mc but there will be degradation on both sides as you go out from center. theoretically w/a good duplexer that is properly tuned to 462/467.6375 you "could" span all the channel from 550 to 725. I have seen this done once in the past and I serviced it for a few yrs but it was 2 transmitters and 2 receivers set up as a quasi combiner w/duplexer to operate off one antenna. now to the other option 2 antennas can be done "if" you have enough isolation. horizontally at 10W you would need about 30' or so w/unity antennas. vertically you could do about 10' w/lower ant inverted.

it is I really liked their stuff. we had numerous desktop supplies go bad rather quickly over a short period including on on my bosses desk. pretty funny when it went POP and then there was the smell......................

bought 2 of these for myself from the above vendor as my supplier is no longer carrying Astron products. I asked why and it appears there has been some QC and PR problems. I am now looking at Samlex and Duracom. I have never been a fan of switching supplies but it seem that that is the trend. this http://www.samlexamerica.com/products/ProductDetail.aspx?pid=34 wow not a bad price http://www.dxengineering.com/parts/sxa-03271

its an atmospheric condition a little like skip on lowband.

just an FYI on the 1225 machines https://forums.mygmrs.com/index.php/topic/195-motorola-gr1225-uhf-repeater/?do=findComment&comment=1612 also all of the ones I've seen and serviced were 40W and 32-36 after the filter. at a stand alone site they're pretty good, in high RF environments you better have some damn good filtering. I have also seen the PA's put out junk from time to time.

tube.

https://www.mygmrs.com/view?id=1216 https://www.mygmrs.com/view?id=137 both of these are suppose to be active.