Skipp,
I went down both roads with the same outcome. no response from the 2nd set of coils. No time to troubleshoot further. may have a bad transistor or coil. Hopefully time will materialize soon. 73, Mike WM4B _____ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of skipp025 Sent: Sunday, March 15, 2009 9:58 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Micor Mobile TLD8262B10 Exciter Question Based on my experience with radios like the Micor Mobile with the tx band-pass filter and the MSR-2000 exciter... the best way to tune up these units is to find the coil preset information in the Service Manual and start with reseting those items back to the chart indicated height position. Sure you can adjust some coils when moving the exciter small distances from the last operating frequency. But some coils are not simple peak or dip adjustments. They interact with the previous or trailing coil adjustments and should be adjusted per the manual only... re-tweaks just don't do it. In the process of tuning the exciter and related filters you'll sometimes see only slight meter movements as you step up through the chain/process. One stage adjustment of the MSR-2000 is really hard to see initial meter movement. A re-tweak of the exciter won't always show the mentioned small meter movements and it's sometimes very easy to adjust a stage to a wrong peak/dip. So start from scratch most every time. Be sure to use the coil position chart information provided in the manual or your results will surely vary. cheers, s. > "Mike Besemer \(WM4B\)" <mwbese...@...> wrote: > > Not lookin' good for the home-team. I've got some reading at the meter plug > pin 3, but L403 doesn't effect it at all. No indication at meter plug 4 at > all. Guess I need to troubleshoot or scare up another exciter. Good thing > this is a long-term project! > > > > 73, > > > > Mike > > WM4B > > > > From: Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com> yahoogroups.com > [mailto:Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com> yahoogroups.com] On Behalf Of Eric Lemmon > Sent: Sunday, March 15, 2009 4:46 PM > To: Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com> yahoogroups.com > Subject: RE: [Repeater-Builder] Micor Mobile TLD8262B10 Exciter Question > > > > Mike, > > Probably. The fact that you could receive the signal suggests that the > exciter is working, but just has a very low output. Tuning should fix that. > Most commercial-band VHF exciters will tune to 2m without modification, but > that is not always the case. > > 73, Eric Lemmon WB6FLY > > -----Original Message----- > From: Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com> yahoogroups.com > <mailto:Repeater-Builder%40yahoogroups.com> > [mailto:Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com> yahoogroups.com > <mailto:Repeater-Builder%40yahoogroups.com> ] On Behalf Of Mike Besemer > (WM4B) > Sent: Sunday, March 15, 2009 1:30 PM > To: Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com> yahoogroups.com > <mailto:Repeater-Builder%40yahoogroups.com> > Subject: RE: [Repeater-Builder] Micor Mobile TLD8262B10 Exciter Question > > Eric, > > Got that. thanks. But the exciter is okay as-is (except for tuning), is > that correct? > > Mike > > From: Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com> yahoogroups.com > <mailto:Repeater-Builder%40yahoogroups.com> > [mailto:Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com> yahoogroups.com > <mailto:Repeater-Builder%40yahoogroups.com> ] On Behalf Of Eric Lemmon > Sent: Sunday, March 15, 2009 4:19 PM > To: Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com> yahoogroups.com > <mailto:Repeater-Builder%40yahoogroups.com> > Subject: RE: [Repeater-Builder] Micor Mobile TLD8262B10 Exciter Question > > Mike, > > Besides tuning the exciter, you'll also need to tune the bandpass filter > that is between the exciter and the PA. Start here: > <www.repeater-builder.com/rbtip/micorvhfbpf.html> > > 73, Eric Lemmon WB6FLY > > -----Original Message----- > From: Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com> yahoogroups.com > <mailto:Repeater-Builder%40yahoogroups.com> > <mailto:Repeater-Builder%40yahoogroups.com> > [mailto:Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com> yahoogroups.com > <mailto:Repeater-Builder%40yahoogroups.com> > <mailto:Repeater-Builder%40yahoogroups.com> ] On Behalf Of Mike Besemer > (WM4B) > Sent: Sunday, March 15, 2009 1:00 PM > To: Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com> yahoogroups.com > <mailto:Repeater-Builder%40yahoogroups.com> > <mailto:Repeater-Builder%40yahoogroups.com> > Subject: [Repeater-Builder] Micor Mobile TLD8262B10 Exciter Question > > Micor Gurus, > > I just came into possession of a Micor Mobile with this exciter installed. > The unit had no Channel Elements installed when I got it, so I borrowed one > out of another Micor I have just to try the radio out. With a 147.015 MHz > Channel Element installed in this exciter, I get no power from the radio, > but I do hear the signal in a nearby receiver. > > I swapped the Exciter (same Part #) from my other (working) Micor into the > unknown radio and get good power using this channel element. With the > unknown exciter in the known-good radio, I get no power output. Obviously, > I've isolated the 'issue' to the exciter. > > My question is, will this exciter work in the 2-meter range without > modification? If so, then apparently I've got some troubleshooting to do. > If not, what mods need to be done to make it work down this low? > > Thanks in advance, > > Mike > WM4B >
