---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 01/07/11: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:15 AM - Re: VM1000 backlighting dimming (Robert L. Nuckolls, III) 2. 08:41 AM - Inexpensive VOR diplexer () 3. 10:12 AM - Re: Inexpensive VOR diplexer (Ron Quillin) 4. 11:24 AM - Oops - SD8 Regulator (John Morgensen) 5. 01:50 PM - Re: Inexpensive VOR diplexer () 6. 02:43 PM - Re: Inexpensive VOR diplexer (Ron Quillin) 7. 04:37 PM - Re: Inexpensive VOR diplexer () 8. 09:25 PM - Re: Inexpensive VOR diplexer (Don) ________________________________ Message 1 _____________________________________ Time: 05:15:33 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: VM1000 backlighting dimming I've got the exact same problem with my older VM-1000 using a B&C dimmer. I rarely fly at night, so fixing the problem has not been a priority. It seems that when I first installed the devices, it worked as advertised with plenty of night lighting. On a recent night flight, however, the VM 1000 was too dim to use. At some point, I added another device to the dimmer that supports the VM-1000. I have supposed that the additional current draw caused the problem, but as stated, I haven't taken any steps to correct. The first thing to do is get MEASUREMENTS as to how much voltage is being applied to the VM1000 dimming input. Combine this with an experiment to bypass any existing dimmer and apply full bus voltage. Up until recently, the VM-1000 has been supported by an outfit here in San Antonio (Boerne Stage Airport.) Thanks to my weak memory, I can't remember the name of the new outfit or the new owner, but I remember their exact location and I still have their phone number. They were very helpful a couple of years back when I first flew and helped me get a different CPU chip for the higher fuel pressure reading my AFP fuel injection required. I haven't talked to them in a couple of years, but assume they are still in operation. Their phone number is (was) 1-830-755-6330. I'll check further to see if they are still in operation and if they have any suggestions for the dimming problem. They should suggest the same sort of investigation and experiments to determine if there is a VM1000 problem or and externally induced power supply issue. When we did the DIM series devices now sold by B&C, the design goals concentrated on how a dimmer is used the vast majority of the time. When flying in a max dark adjusted condition, one's visual acuity for seeing things outside was best if lights inside were just barely bright enough to read the instruments. Typically 4 or 5 volts on 12 v incandescent lamps. The short interval that the lamps could use a full-bright voltage supply was during twilight. The only time pilots wished such lights were brighter might be during thunderstorms. The B-52s I worked on in '61 had "thunderstorm lights." Sealed beam lamps above the pilot's heads on both sides. Lightning flashes tended to blind the crew so it was then useful to have some really robust flood lighting! I tend to stay away from thunderstorms . . . they're too loud. Do the homework to see if the lighting problem with the VM1000 is internal or externally caused. Bob . . . ________________________________ Message 2 _____________________________________ Time: 08:41:49 AM PST US Subject: AeroElectric-List: Inexpensive VOR diplexer From: I need to use one VOR antenna to server two VOR receivers. I'm guessing the CATV job they sell at Home Depot won't work? Do any of you folks make these or have an idea where to buy one of these without a mortgage? Thanks, Glenn Long ________________________________ Message 3 _____________________________________ Time: 10:12:30 AM PST US From: Ron Quillin Subject: Re: AeroElectric-List: Inexpensive VOR diplexer At 08:34 1/7/2011, you wrote: >I need to use one VOR antenna to server two VOR receivers. I'm guessing >the CATV job they sell at Home Depot won't work? Do any of you folks >make these or have an idea where to buy one of these without a mortgage? > >Thanks, > >Glenn Long Well, there's this from minicircuits.com http://minicircuits.com/cgi-bin/modelsearch?search_type=info&model=ZFSC-2-1W-75B%2B for ~$50 that will do VOR & GS. Or others on eBay for ~$90... ________________________________ Message 4 _____________________________________ Time: 11:24:26 AM PST US From: John Morgensen Subject: AeroElectric-List: Oops - SD8 Regulator I managed to "kiss" the top of the big blue capacitor with a #30 drill. It penetrated the black cardboard and I can see silver (Hopefully the outside of the can). Should I: 1. Test it somehow. 2. Pitch and replace. 3. Dab it with silicon and call it good. ? John Morgensen RV4 - Purchased flying RV9A - Getting close. ________________________________ Message 5 _____________________________________ Time: 01:50:57 PM PST US Subject: RE: AeroElectric-List: Inexpensive VOR diplexer From: Thanks, Is 75 ohms correct for the Nav Splitter? I found a used job from an old Cessna at DTW parts for $40.00. Do these things wear out? Glenn E. Long From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ron Quillin Sent: Friday, January 07, 2011 1:08 PM Subject: Re: AeroElectric-List: Inexpensive VOR diplexer At 08:34 1/7/2011, you wrote: I need to use one VOR antenna to server two VOR receivers. I'm guessing the CATV job they sell at Home Depot won't work? Do any of you folks make these or have an idea where to buy one of these without a mortgage? Thanks, Glenn Long Well, there's this from minicircuits.com http://minicircuits.com/cgi-bin/modelsearch?search_type=info&model=ZF SC- 2-1W-75B%2B for ~$50 that will do VOR & GS. Or others on eBay for ~$90... ________________________________ Message 6 _____________________________________ Time: 02:43:07 PM PST US From: Ron Quillin Subject: RE: AeroElectric-List: Inexpensive VOR diplexer At 13:47 1/7/2011, you wrote: >Thanks, > >Is 75 ohms correct for the Nav Splitter? No, it's not. Try a 50 ohm ZFSC-2-1+ for ~$45 Do you need GS? Upper NAV freq ~120MHz, but if you need GS you need a splitter good to ~350MHz. Make sure the one you get has enough bandwidth. > I found a used job from an old Cessna at DTW parts for $40.00. Do > these things wear out? They shouldn't if not abused, but I have seen bad ones that look fine. Connectors tight, no corrosion, etc... >Glenn E. Long ________________________________ Message 7 _____________________________________ Time: 04:37:50 PM PST US Subject: RE: AeroElectric-List: Inexpensive VOR diplexer From: Thanks for the info Ron, Do Not Archive Glenn From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ron Quillin Sent: Friday, January 07, 2011 5:30 PM Subject: RE: AeroElectric-List: Inexpensive VOR diplexer At 13:47 1/7/2011, you wrote: Thanks, Is 75 ohms correct for the Nav Splitter? No, it's not. Try a 50 ohm ZFSC -2-1+ for ~$45 Do you need GS? Upper NAV freq ~120MHz, but if you need GS you need a splitter good to ~350MHz. Make sure the one you get has enough bandwidth. I found a used job from an old Cessna at DTW parts for $40.00. Do these things wear out? They shouldn't if not abused, but I have seen bad ones that look fine. Connectors tight, no corrosion, etc... Glenn E. Long ________________________________ Message 8 _____________________________________ Time: 09:25:59 PM PST US From: "Don" Subject: RE: AeroElectric-List: Inexpensive VOR diplexer Glen, I have a used one that is good for VOR and Glide Slope. $50 and it is yours. -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of longg@pjm.com Sent: Friday, January 07, 2011 8:35 AM Subject: AeroElectric-List: Inexpensive VOR diplexer I need to use one VOR antenna to server two VOR receivers. I'm guessing the CATV job they sell at Home Depot won't work? Do any of you folks make these or have an idea where to buy one of these without a mortgage? 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