{"id":16,"date":"2011-06-15T11:38:14","date_gmt":"2011-06-15T16:38:14","guid":{"rendered":"http:\/\/192.168.254.34\/?p=16"},"modified":"2013-08-22T19:44:02","modified_gmt":"2013-08-22T19:44:02","slug":"new-ki4ijq-repeater","status":"publish","type":"post","link":"https:\/\/flecom.net\/?p=16","title":{"rendered":"“New” KI4IJQ Repeater"},"content":{"rendered":"

So I finally got around to working on the permanent 147.180Mhz repeater… originally the 147.345Mhz repeater this was supposed to be the permanent repeater, the current one was just temporary… so after 5 or so years in service I figure its about time the real one went up \ud83d\ude42<\/p>\n

\"KI4IJQ<\/p>\n

so here is the basic layout of the repeater… from top to bottom<\/p>\n

1) Audio Compressor – Will normalize (expand\/compress) incoming audio before the repeater controller
\n2) Arcom RC-210 repeater controller – Not sure if this will be the final controller, thinking of getting an S-Com 7330 since I am not totally happy with the Arcom
\n3) Audio panel – this panel just has a speaker, volume control and selector switch that lets you listen to the audio coming out of each receiver
\n4) Receiver Voter – basically an audio comparator, as part of a voting system the voter is what decides which receiver is getting the “best” signal and “votes” it, aka passes the audio to the controller
\n5) Mastr III – this is the actual VHF 2M repeater…
\n6) Mastr III Receiver Shelf – this has 2x UHF receivers for the satellite receive site links
\n7) Mastr III Receiver Shelf – this has 1x UHF receiver for satellite receive site links
\n8 ) UHF Preamplifier\/multi coupler – shares one UHF antenna to the 3x UHF receivers
\n9) Fuse Panel – distributes the high current 12V to all the low current 12V equipment
\n10) 12V high current power supply – powers everything in the shelf minus any power amplifiers
\n11) 26V high current power supply – powers the Mastr III VHF PA
\n12) VHF Mastr III PA – 10mW in 110W out – set to 15W out via software PA pot setting… will be driving a 250W TPL PA<\/p>\n

so first thing I had to do was program the all the shelfs…<\/p>\n

\"Mastr<\/p>\n

mmm DOS<\/p>\n

then tune the RX Synthesizer modules…<\/p>\n

\"Mastr<\/p>\n

Red light indicates no lock. There is a tunable capacitor to tweak the VCO.<\/p>\n

\"Mastr<\/p>\n

using an extender card you tweak the VCO until the red light turns off… then you have to tune the front end…<\/p>\n

\"Mastr<\/p>\n

basically a 5 slug filter in front of the receiver to increase selectivity<\/p>\n

\"Mastr<\/p>\n

tuning it requires the use of a signal generator… as you get closer to getting it properly tuned you keep turning down your signal until you get it to “ideal”… which ideally should be at -120dBm or better<\/p>\n

next up is the transmitter<\/p>\n

\"Mastr<\/p>\n

using the Mastr III DOS software and the PA PWR setting I tuned the Mastr III’s PA to 15W so it could drive a secondary PA, a 250W TPL<\/p>\n

I did this for 2 reasons, 1 the Mastr III PA is a lot more difficult\/expensive to repair\/replace than the TPL, so the TPL will act as a “sacrificial lamb” if anything catastrophic happens to the repeater… 2 once the system gets its satellite receive sites its receive footprint is going to be pretty large, so we need to compensate with more transmit power<\/p>\n

\"VHF<\/p>\n

done for now… all thats left is to use the service monitor and a TIMS set to set all the audio levels<\/p>\n","protected":false},"excerpt":{"rendered":"

So I finally got around to working on the permanent 147.180Mhz repeater… originally the 147.345Mhz repeater this was supposed to be the permanent repeater, the current one was just temporary… so after 5 or so years in service I figure its about time the real one went up \ud83d\ude42 so here is the basic layout […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-16","post","type-post","status-publish","format-standard","hentry","category-ham"],"_links":{"self":[{"href":"https:\/\/flecom.net\/index.php?rest_route=\/wp\/v2\/posts\/16","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/flecom.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/flecom.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/flecom.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/flecom.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=16"}],"version-history":[{"count":12,"href":"https:\/\/flecom.net\/index.php?rest_route=\/wp\/v2\/posts\/16\/revisions"}],"predecessor-version":[{"id":126,"href":"https:\/\/flecom.net\/index.php?rest_route=\/wp\/v2\/posts\/16\/revisions\/126"}],"wp:attachment":[{"href":"https:\/\/flecom.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=16"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/flecom.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=16"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/flecom.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=16"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}