With that said. . . Here is my main problem and question. . . A # of years ago local radio club purchased 3 complete repeater stations. . . Have one converted working fine with no known issues other than it doesn't get used as much as I'd like folks to use it ;)
The other two stations one had issues on fire up, other appeared functional (best as could be told since the units didn't have TX/RX elements in them and couldn't bench on original freq and had to tune exciter/receiver to high band elements I have. Have since rerocked onto a ham freq 147.045TX/147.645RX and have been experiencing many problems since. (After looking over everything with a local tech who spends his former life working on Lowband and UHF Mastr II's--20+ years) stated to check IF Alignment (weird things happening when audio hit certain levels and such which matched a lot in the GE IF alignment docs I found on Repeater Builder stating IF Alignment issues) After looking at other working base with the IF alignment test setup (o'scope looking at wave forms) it was apparent that this base was definitely out of alignment. Still having some issues where I can't get the audio level up to the 1 V RMS @ P904-11 and P904-17 as outlined in the alignment docs. (I can get 1V RMS but wave form coming out of there into repeater controller is clipping as it is over driven. . . When set for not clipping with 1KC tone @ 3KC deviation audio level is about .6-.7 V RMS) Main reason for needing schematic is to follow and see if any thingis weak in audio path thru everything and couldn't follow audio thru IFAS board as schematics didn't match up. My next question is what does R622 on the board (IFAS 19D432667G1 Rev A) do? Can't find it in text write up or details on RX Alignment. . . Now for interesting thing schematic lists R622 as being in REV B and later boards not REV A boards. Looks too good of a solder job and such to be anything other than factory so either this board is mislabeled for REV #'s or was one of the first boards to have R622 put in it before official REV B designation assigned. (Reason is this board had both pots R622 and R608 totally at one of the stops-full CCW--along with other adjustments at one end or the other before I started with it) At this point everything is working in this repeater and working close to where it should be as audio levels just aren't up to snuff and a little on the weak side. . . . (will trace audio on next trip to the mountain and go from there) Thanks all Tony, KA3VOR -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of John Transue Sent: Saturday, January 03, 2009 10:06 AM To: [email protected] Subject: RE: [Repeater-Builder] mastr II question. . . Eric, You're AMAZING!! I'm glad you are watching the list. John >-----Original Message----- >From: [email protected] [mailto:Repeater- >[email protected]] On Behalf Of Eric Lemmon >Sent: Friday, January 02, 2009 9:02 PM >To: [email protected] >Subject: RE: [Repeater-Builder] mastr II question. . . > >Tony, > >The 19D432667G1 IFAS board is covered in LBI-4986R, here: ><www.repeater-builder.com/ge/lbi-library/lbi-4986r.pdf> > >73, Eric Lemmon WB6FLY > > >-----Original Message----- >From: [email protected] >[mailto:[email protected]] On Behalf Of Tony Alviar >(Home) >Sent: Friday, January 02, 2009 5:19 PM >To: [email protected] >Subject: [Repeater-Builder] mastr II question. . . > >OK not sure if this goes here or on the Mastr II and/or GE list figured >I'd try here first though. . . . > >Have a Mastr II continuous duty high band repeater station (factory GE >repeater) > >Looking for LBI # that covers IF/audio/squelch board p/n 19D432667G1 >REV A most of this board matches the schematic in lbi-38507e > >however, this particular board has a large transformer near the >transistors that mount on the heat sink and has two transistors versus >one shown in lbi-38507e > >Any help would be appreciated. . . . If anyone has a copy of that >particular LBI a copy would be appreciated. . . > >Thanks >Tony, KA3VOR > > >------------------------------------ > > > >Yahoo! Groups Links > > > > >__________ NOD32 3733 (20090102) Information __________ > >This message was checked by NOD32 antivirus system. >http://www.eset.com ------------------------------------ Yahoo! Groups Links
