Bob, Yes, I realized the other gentleman had the repeater, and not you. I was just making a generalized comment. I will dig my old analog manual out and see if the same thing can be done with it.
Unless I have you mixed up with someone else, you and I had done some PM'ing, and forum discussions about MSF's on the Batlab site. I do not get on there too much anymore. There are a lot of sharp people on there, but a few of them were a little too cranky for me. Gary KB7TRP --- In Repeater-Builder@yahoogroups.com, "Bob M." <[EMAIL PROTECTED]> wrote: > > Thanks. I'll take your word for it that we've talked > before! > > I'm not the one with the station, Mathew Quaife is. > His is a CLB and I don't know if it has a TTRC, or if > the station connector exists on his unit. Right now > he's having other problems trying to get all the > alarms to go away. I think they will once he gets the > filter/duplexer tuned up and gets the right amount of > loss through it. > > That probe kit was quite a deal. You were lucky. At > least the HP units don't have a removable probe, so > they tend to come with one, although they're usually > missing all the slip-on adapters and tips. I have one > here right now with a bad probe, and naturally no new > ones are available from Agilent any more. > > Bob M. > ====== > --- Gary <[EMAIL PROTECTED]> wrote: > > > Hi Bob! Long time, since I spoke to you. On the CXB > > station there is > > a transmit disable input on station connector J2-5. > > (comes from TTRC > > P2900-4) A low applied there will inhibit all > > transmit activity. I > > did this on my 440 machine with just a simple DTMF > > board to comply > > with the remote knockdown requirement. This way, I > > could continue > > using the internal controller. (better sounding > > audio, than any > > external controller, in my opinion) > > > > By the way, I have a Ballantine 3440A RF > > millivoltmeter. I aquired > > the meter, and the complete RF probe kit, for it off > > ebay. The meter > > was $50, and the big suprise was the RF probe kit. I > > got it for $30, > > and it was basically brand new. Ballantine lists > > this probe kit for > > $900+! Was my lucky day! > > > > Gary KB7TRP > > > > --- In Repeater-Builder@yahoogroups.com, "Bob M." > > <[EMAIL PROTECTED]> > > wrote: > > > > > > Boonton makes some nice instruments. Just make > > sure > > > the RF probe comes with it (they plug in and are > > often > > > not included), and that the unit is guaranteed to > > be > > > working. You don't need to measure the exact > > > amplitude, you only need to detect the peak and > > dips > > > as you tune the filter coils. > > > > > > The stations can be set up to repeat, do CW ID, > > and > > > even time out, if programmed correctly. On/off > > control > > > is the primary item you'll need to provide from > > the > > > outside world, and I don't think there was an easy > > way > > > to do it (i.e. they didn't just give you a signal > > you > > > could ground to disable the transmitter). I found > > it > > > was just easier to do everything with an external > > > controller, and this gave me the ability to put in > > an > > > audio delay module at the same time. However, I > > will > > > say that the interfacing is not as simple as > > plugging > > > something in and running with it; significant > > > technical prowess would be required to do the job > > > successfully. My station was a CXB that programs > > with > > > a PC and RSS, so changing parameters is a whole > > lot > > > easier. > > > > > > Bob M. > > > ====== > > > --- Mathew Quaife <[EMAIL PROTECTED]> wrote: > > > > > > > The unit that I got is the Boontoon RF > > > > Millivoltmeter Model 92E. Looks like it should > > > > cover what I need it to do. Thanks for the > > help, > > > > when it gets here, I am certain I will have more > > > > questions until this repeater is up and > > fucntional, > > > > and then comes the fun of tying in an outbord > > > > controller for the unit. Thanks. > > > > > > > > Mathew > > > > > > > > > > > > "Bob M." <[EMAIL PROTECTED]> wrote: > > > > There will be some loss in the filter (maybe > > 0.5dB > > > > per > > > > section), and about 30dB loss when using the > > tuning > > > > probe. If you're feeding in 223mV (0dBm), you > > would > > > > probably measure -30dBm using the RF voltmeter > > > > connected to the tuning probe, when the filter > > is > > > > fully peaked. This is around 7mV. However, even > > when > > > > the coil is mis-tuned, you'll still get some > > > > indication with the proper meter. It'll be > > harder to > > > > see with a spectrum analyzer because of its low > > > > impedance input. > > > > > > > > I use an old HP3406A sampling (RF) voltmeter. > > They > > > > show up on eBay once in a while, but you can't > > get > > > > parts for them any more, so if it doesn't work, > > it's > > > > difficult to repair unless a common part has > > failed. > > > > > > > > Mike (ILQ) please contact me. > > > > > > > > Bob M. > > > > ====== > > > > --- Mathew Quaife wrote: > > > > > > > > > Hi Mike, did a little research and found one > > in > > > > > Chicago. I knew about the SM, just never > > thought > > > > of > > > > > one being outside the SM. So should have one > > here > > > > > in a few days, and then get back to working on > > the > > > > > repeater. > > > > > > > > > > Mathew > > > > > > > > > > > > > > > Mike Morris wrote: > > > > > At 05:13 AM 11/13/05, you wrote: > > > > > > > > > > >Sitting here looking at the tune up procedure > > for > > > > > the filter, it tells me > > > > > >to insert a rf millivoltmeter probe into J18 > > and > > > > > insert a 225 mV signal > > > > > >into the the output of the post filter. I did > > > > this, > > > > > and get nothing on > > > > > >the meter at all. > > > > > > > > > > It takes a LOT of level to force a signal past > > a > > > > > detuned filter. > > > > > > > > > > >Now I'm not sure if there is a difference > > between > > > > > my RS Volt-Ohm meter and > > > > > >an RF millivoltmeter. > > > > > > > > > > Your RS VOM does have an AC mode, but I'd be > > > > > surprised > > > > > if it responds to frequencies above 100khz. If > > it > > > > > responds to > > > > > 447MHZ RF at all, I'd be very, very > > surprised... > > > > > > > > > > An RF millivoltmeter is just that - a meter > > that > > > > > reads at RF > > > > > frequencies down to the millivolt (and > > frequently > > > > > microvolt) > > > > > levels. > > > > > > > > > > If you think about it a service monitor and a > > > > > spectrum analyzer > > > > > both have the function as RF > > millivoltmeters... > > > > when > > > > > you measure > > > > > receiver sensitivity you are injecting a low > > level > > > > > RF signal into the > > > > > receiver, and the RF millivolt / microvolt > > meter > > > > > section is reading > > > > > the result. > > > > > > > > > > Mike WA6ILQ > > > > > > > > > > > > > > > __________________________________ > > > Yahoo! Mail - PC Magazine Editors' Choice 2005 > > > http://mail.yahoo.com > > > > > > > > > > > > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > [EMAIL PROTECTED] > > > > > > > > > > > > > > > __________________________________ > Yahoo! FareChase: Search multiple travel sites in one click. > http://farechase.yahoo.com > 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/
