[Repeater-Builder] Service Monitor Question
Hi Everyone, I'm thinking about buying a used service monitor for various projects, and I've come across a few units that look good (from a price point) but I can't find any data on them. 1) Racal Dana 6113G Digital Radio Test Set Service Monitor 2) Cushman CE-4000 3) HP 8924C 4) Ramsey COM3 I realize these are NOT the preferred field service units (I like IFR myself), but for now I just want something usable here and there. Opinions on them are welcome or pros/cons. Thanks! Tony
RE: [Repeater-Builder] Service Monitor Question
The 8924c is nice. I have one of those. The 8920b manual will be of help with that unit. I've owned a com3. Was quick and easy but less featured, and less expensive. Chris Kb0wlf -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:Repeater- buil...@yahoogroups.com] On Behalf Of Tony KT9AC Sent: Monday, July 13, 2009 11:26 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Service Monitor Question Hi Everyone, I'm thinking about buying a used service monitor for various projects, and I've come across a few units that look good (from a price point) but I can't find any data on them. 1) Racal Dana 6113G Digital Radio Test Set Service Monitor 2) Cushman CE-4000 3) HP 8924C 4) Ramsey COM3 I realize these are NOT the preferred field service units (I like IFR myself), but for now I just want something usable here and there. Opinions on them are welcome or pros/cons. Thanks! Tony Yahoo! Groups Links Checked by AVG - www.avg.com Version: 8.5.387 / Virus Database: 270.13.8/2227 - Release Date: 07/13/09 05:56:00
Re: [Repeater-Builder] Service Monitor Question
I'm considering selling my IFR 1200S. If anyone is interested, please email me direct - don at httpd.org. If you're interested in a ball park selling price for a monitor of this caliber, google IFR 1200S and see what the going prices are these days. The last time I tried this, I had a ham from New Mexico offer me $500.00 for the unit. I also agree with Kevin, the Ramsey COM3 is *NOT* a true service monitor. IMHO it *IS* a piece of junk that should have never been produced in the first place. But I'm sure that there are people out there that will disagree . . . . Don, KD9PT - Original Message - From: Kevin Berlen, K9HX To: Repeater-Builder@yahoogroups.com Sent: Monday, July 13, 2009 3:58 PM Subject: Re: [Repeater-Builder] Service Monitor Question I don't know about the first three units. I have always used Motorola branded monitors. However, to call the Ramsey unit a service monitor is an affront to every real service monitor that has ever existed. These are and always will be mere toys, and I could not recommend one to anyone under any circumstances. 73, Kevin, K9HX At 12:25 PM 7/13/2009, you wrote: Hi Everyone, I'm thinking about buying a used service monitor for various projects, and I've come across a few units that look good (from a price point) but I can't find any data on them. 1) Racal Dana 6113G Digital Radio Test Set Service Monitor 2) Cushman CE-4000 3) HP 8924C 4) Ramsey COM3 I realize these are NOT the preferred field service units (I like IFR myself), but for now I just want something usable here and there. Opinions on them are welcome or pros/cons. Thanks! Tony No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.384 / Virus Database: 270.13.12/2235 - Release Date: 07/13/09 05:56:00
[Repeater-Builder] Service monitor question (was Re: Re: Cushman CE-4)
Although, I seem to remember Skip's Model 80 did just fine tuning up the receiver in my Hammerlund Outercom xcvr back in the 70's. Or was that the 60's? Nevermind! I learned how to tune a receiver that day, RF anyway. Just learned about IF's last week. BTW, if I never said it back then, thanks Skip! td wb6mie Wow another callsign from the good old days! Good to see you! The model 80 sure did drift alot, but it was a lot easier getting a weak signal out of it than detuning my Heathkit Pawnee running into a dummy load which was the signal generator it replaced. By the way I still have the model 80 ... and the Bird 43 we bought at the same time. Amazingly enough I haven't had an urge to replace the Bird! 73's Skip WB6YMH 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/
Re: [Repeater-Builder] Service monitor question (was Re: Re: Cushman CE-4)
Hello all (Old timers week?) My first signal generator (you might remember this Skip) was a Heathkit TS-4A Television Sweep Alignment generator that I had been using years earlier for TV repair. The Marker Generator output was rather unstable but I used it anyway. (ever known anything Heathkit that was stable except as a door stop?) I used the third harmonic output for tuning receivers on the 2 meter band. I used the 9th harmonic output for tuning 440 MHz receivers. In order to attempt to temperature stabilize the TS-4A, I plugged it into a Sola line regulation transformer ... then placed the TS-4A under a blanket for two days prior to use. The variable output attenuator loaded the oscillator as it was adjusted - so I used that as the final tweak of the frequency output. The attenuator I used was a Kay switchable attenuator with an HP adjustable attenuator in series with that. Those were fun days and I did learn a lot too. It was later when I got a Motorola T-1034 Signal Generator to use. The T-1034 was made by Measurments Corp. and, I believe, a re-packaged FM-560. These days, I have a Motorola T-1034 for occasional use - typical is the UHF Micor. Then I have a Cushman CE-5 and a CT Systems 5100S, both are service monitors. 73, Neil McKie - WA6KLA wb6ymh wrote: Although, I seem to remember Skip's Model 80 did just fine tuning up the receiver in my Hammerlund Outercom xcvr back in the 70's. Or was that the 60's? Nevermind! I learned how to tune a receiver that day, RF anyway. Just learned about IF's last week. BTW, if I never said it back then, thanks Skip! td wb6mie Wow another callsign from the good old days! Good to see you! The model 80 sure did drift alot, but it was a lot easier getting a weak signal out of it than detuning my Heathkit Pawnee running into a dummy load which was the signal generator it replaced. By the way I still have the model 80 ... and the Bird 43 we bought at the same time. Amazingly enough I haven't had an urge to replace the Bird! 73's Skip WB6YMH 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/
[Repeater-Builder] Service monitor question (was Re: Re: Cushman CE-4)
If you want to do duplex measurements here is what I would do. Look for an IFR 1000S for your primary service monitor. Then look for an IFR 500. Those things should be cheap and plentiful by now. Use the 500 as the source and the 1000 as your calibrated receiver. Acquire some directional (or non-directional) transmission line couplers off of ebay or rec.radio.swap. Then measure away. You could even get a simpler generator like an HP, dang it, forgot the number but I think it went up to 1200 mHz or so, or a wavetek that goes to 512 mHz or something similar. Yes, it is not automatic but as I recall, duplex testing with one service monitor was not all it was cracked up to be. I would not suggest an HP-608 or a Model 80 unless you can afford to keep them powered up 24/7 in a climate controlled room. Then theres the tube budget. Although, I seem to remember Skip's Model 80 did just fine tuning up the receiver in my Hammerlund Outercom xcvr back in the 70's. Or was that the 60's? Nevermind! I learned how to tune a receiver that day, RF anyway. Just learned about IF's last week. BTW, if I never said it back then, thanks Skip! td wb6mie From: wb6ymh [EMAIL PROTECTED] Subject: Service monitor question (was Re: Re: Cushman CE-4) The CE-5 has 1 Khz steps and does not do full duplex. There are various options on the IFRs some have tracking generators. I've done a bit of googling for IFRs and Cushmans, but I guess they are too old, I found very little information other than old for sale ads. (And one guy that had a picture of himself and his CE-50 along with his other family album pictures !) There seem to be quite a few Motorola service monitors on ebay, but from what I remember they had a reputation for being unreliable. I'll bet the CE-5 drifts a little less than the model 80 it's replacing (grin). 73's Skip WB6YMH 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/
