Skipp said: Do you use the exact shielded wire I mention in the text..? (from the external controller to the squelch gate module) Are there nearby high powered transmitters? TV or Broadcast Radio?
I say: Well, not the exact. But I did use shielded wire and I'm positive there's not a noise problem involved with the controller and audio in/out, PTT and COR....works great. The cable has foil and woven shield and ... if I do say so myself, this repeater sounds great. Good ears too. We have the plug-in preamp. We've got three computers with IRLP, Echolink and WIRES 24/7. Using a CAT250 with the RLS 1000 3-port switch modified slightly to balance the audio between ports. Now, it had a few problems until we restrung the cans and aligned them and made a run of new 214 to the antenna...new one of those too. It has been great since. Just a couple of litttttle problems. Well, yes..there is Channel 11 south on the Santa Ritas, LOS big time and there's 1330 AM that has spurs EVERYWHERE! We watch that one like a hawk and tattle on them when necessary. They are real close to the repeater. Thanks again. John in Tucson ----- Original Message ----- From: "skipp025" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, July 27, 2004 4:10 PM Subject: [Repeater-Builder] Re: Deviation Limiting/Linearity > "WD7F - John in Tucson" <[EMAIL PROTECTED]> wrote: > It's obvisouly not aligned properly. I can turn it > a tad CCW until the noise increases (possibly going > into oscillation?) and breaks the squelch and then > turn it back a hair CW until it stops. I can see > the audio noise change when I hit the spot where > it goes haywire. The only proper L201 adjustment that I know about is described in the Service Manual, completed with the proper test equipment. I know it reads kind of hard nosed, I'm not trying to be. Now that you've adjusted the coil, you need to align it per the proper instructions. This is such a hard (ie read pain in the arse alignment to complete, that I don't recomend anyone touch L201 unless they know there is a problem. Since you bought your repeater second hand, there is a chance someone else touched the adjustment. > I have listened to this repeater for a few months > with my trusty HTX-202 so I "earballed" it and left > it until we can get to it. We will do the alignment > again according to the manual soon. > > And you said: >: As I describe in my text, above >: 3.5KHz (service monitor) deviated test input, the MSR2000 >: receiver filters start to distort the audio. You can see >: it with a scope at the discriminator output. > > I say: > Yep, you're perzactly right. However, on our second attemp > to set the deviation back in March, we did have it looking > pretty good up to 5K looking at the audio at the input of the > controller. > And it tracked pretty good up to about 3.5K. It held still > for a couple months and then we had the Channel 11 spur > that drove us crazy. It was so strong, I thought the > repeater was broken. One day, there was noise getting through > with the antenna disconnected.. During that episode we > tweaked it again and probably > messed it up. Do you use the exact shielded wire I mention in the text..? (from the external controller to the squelch gate module) Are there nearby high powered transmitters? TV or Broadcast Radio? > Final comment: > Walt, WA4LDS and an engineer at Channel 4 here in Tucson noticed > that when the picture changed on our local Fox channel, the > repeater noise changed. He was instrumental in getting the Channel > 11 engineer to tweak his > transmiter and it is all better now. > Thanks for the response. > de WD7F > John in Tucson Wow, quite the story... You should be able to check the repeater for proper operation into a termination (load). If a gremlin appears when you place the repeater onto the antenna system, you'll probably know where it's comming in. cheers skipp Yahoo! Groups Links Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
