---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 04/29/11: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:38 AM - 2 1/4 Indicator for ADF (Mick Muller) 2. 08:09 AM - Re: AeroElectric-List Digest: 1 Msgs - 04/28/11 (larry dodge) 3. 10:15 AM - Re: 2 1/4 Indicator for ADF (Robert L. Nuckolls, III) 4. 04:51 PM - Connectors for small diameter 'coax" wires (Neil Clayton) 5. 05:34 PM - Re: Connectors for small diameter 'coax" wires (ROGER & JEAN CURTIS) 6. 06:38 PM - Re: Jhp 520 PTT cable (Turbo_Boss) 7. 08:56 PM - VM1000 sensor question (DEAN PSIROPOULOS) 8. 10:04 PM - Re: Connectors for small diameter 'coax" wires (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 12:38:04 AM PST US From: "Mick Muller" Subject: AeroElectric-List: 2 1/4 Indicator for ADF Greetings O Electronic whizzpersons, I know this is probably a long shot, but here goes. I have a Collins 650 ADF and antenna in my possession, but no Indicator. Simple I hear you say, buy an IND-650 Indicator. My problem is that I have a 2 1/4 inch hole, whereas the IND-650 is a 3.5 inch unit. Does anyone out there know of a 2/1/4 inch indicator that will work with the 650 ADF. Mick Muller ________________________________ Message 2 _____________________________________ Time: 08:09:12 AM PST US From: larry dodge Subject: AeroElectric-List: Re: AeroElectric-List Digest: 1 Msgs - 04/28/11 John,=0A-=0AThanks for the pics. I see the water on our steps to dock.- Boys look like they like each other. =0A-=0ARegards,=0A-=0ALarry=0A=0AF rom: AeroElectric-List Digest Server =0ATo : AeroElectric-List Digest List =0A Sent: Friday, April 29, 2011 2:56 AM=0ASubject: AeroElectric-List Digest: 1 Msgs - 04/28/11=0A=0A*=0A=0A=============== ===========0A- Online Versions of Today's List Digest Archive=0A===================== =====0A=0AToday's complete AeroElectric-List Digest can also be fou nd in either of the =0Atwo Web Links listed below.- The .html file includ es the Digest formatted =0Ain HTML for viewing with a web browser and featu res Hyperlinked Indexes =0Aand Message Navigation.- The .txt file include s the plain ASCII version =0Aof the AeroElectric-List Digest and can be vie wed with a generic text editor =0Asuch as Notepad or with a web browser. =0A=0AHTML Version:=0A=0A- - http://www.matronics.com/digest/digestview .php?Style=82701&View=html&Chapter 11-04-28&Archive=AeroElectric =0A=0AText Version:=0A=0A- - http://www.matronics.com/digest/digestview .php?Style=82701&View=txt&Chapter 11-04-28&Archive=AeroElectric =0A=0A=0A====================== ==0A- EMail Version of Today's List Digest Archive=0A====== ==================0A=0A=0A- - - - - ----------------------------------------------------------=0A- - - - - - - - - - - - - AeroElectric-List Digest Archiv e=0A- - - - - - - - - - - - - - - - - - - ---=0A- - - - - - - - - - Total Messages Posted Th u 04/28/11: 1=0A- - - - - --------------------------------------- -------------------=0A=0A=0AToday's Message Index:=0A---------------------- =0A=0A- - 1. 02:28 PM - Strange radio transmit problems - take 2- (Pe ter Pengilly)=0A=0A=0A=0A________________________________- Message 1- _ ____________________________________=0A=0A=0ATime: 02:28:05 PM PST US=0AFro m: Peter Pengilly =0ASubject: AeroElectric-List: St range radio transmit problems - take 2=0A=0A=0AIn June last year I wrote ab out a problem I was having with the =0Atransmitter in my airplane where the radio would not transmit on some =0Afrequencies. I wonder if I could again ask for some advice?=0A=0AI thought I solved the problem by replacing the radio to antenna coax - =0Abut all I in fact did was shift the frequencies that were problematic. =0ASince then I have tried several different fixes w ithout any success. I =0Ahave improved the grounding of the antenna, replac ed the antenna and =0Atried several different headsets, all with no change to the problem. I =0Ahave found that on the ground without the engine runni ng the radio will =0Atransmit on all frequencies (or at least in 1 MHz step s through the =0Afrequency band). In the air some frequencies cause a probl em (such as =0A118.9, 125.25 and 127.05), but throttling back to idle somet imes =0Aproduces an intelligible transmission, although not great. When the =0Aradio does not transmit it is obvious as no side tone is heard in the =0Aheadset, sometimes carrier wave only is transmitted.=0A=0AThe voltage re gulator (PMR-1) for the SD-8 alternator is mounted very =0Aclose ahead of t he radio, along with the large capacitor and OV thing, =0AI'm now wondering if there is some kind of electro magnetic interference =0Ahappening? Of co urse the best check would be to go fly with the =0Aalternator off, and I sh ould be able to do that over the next few days =0A(there's some wedding goi ng on here tomorrow that is getting in the way =0Aof everything ...). Assum ing it is interference, how far away from the =0Aradio should I mount the V R, is the back side of the firewall a suitable =0Alocation? Should the capa citor be close the the VR, or doesn't it =0Amatter? Its a Becker AR-4201 ra dio, Becker say that if it transmits on =0Aany one frequency there is nothi ng wrong with the radio. Transmit is =0Agood on some frequencies (for examp le 122.6, 129.8) and receive is =0Aalways strong.=0A=0AThanks for your help -======================== ________________________________ Message 3 _____________________________________ Time: 10:15:07 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: 2 1/4 Indicator for ADF At 03:28 AM 4/29/2011, you wrote: > > >Greetings O Electronic whizzpersons, >I know this is probably a long shot, but here goes. >I have a Collins 650 ADF and antenna in my possession, but no Indicator. >Simple I hear you say, buy an IND-650 Indicator. >My problem is that I have a 2 1/4 inch hole, whereas the IND-650 is >a 3.5 inch unit. >Does anyone out there know of a 2/1/4 inch indicator that will work >with the 650 ADF. Check yellowpages.com for aifcraft instruments in Wichita, KS. There's a bunch of folks in the business there. Some have inventory of vintage instruments. One in particular is on the east side of the Mid Continent Airport campus who's name escapes me at the moment. I was in their facility about 10 years ago and they had a warehouse full of yellow-tagged indicators of all types. Ask around the list of folks in ICT . . . Bob . . . ________________________________ Message 4 _____________________________________ Time: 04:51:38 PM PST US Subject: AeroElectric-List: Connectors for small diameter 'coax" wires From: Neil Clayton I know about the existence of connectors for RG0400-like coax cables, but are there similar connectors for small diameter wires like 18AWG shielded Tefzel wires? I hate the resulting "lump" in the wire when I try to connect shield and core wires using butt-splice connectors, and the shrink-wrap never seems to contract nicely around the wires afterwards. Thanks for ideas. Neil ________________________________ Message 5 _____________________________________ Time: 05:34:17 PM PST US From: "ROGER & JEAN CURTIS" Subject: RE: AeroElectric-List: Connectors for small diameter 'coax" wires I know about the existence of connectors for RG0400-like coax cables, but are there similar connectors for small diameter wires like 18AWG shielded Tefzel wires? I hate the resulting "lump" in the wire when I try to connect shield and core wires using butt-splice connectors, and the shrink-wrap never seems to contract nicely around the wires afterwards. Thanks for ideas. Neil If the lump in the wire bothers you, then the best method of connecting two wires is to solder them, there is a good tutorial in the Aeroelectric Connection. Be sure to use a shrink tubing size just large enough to pass over the wires and the soldered connection. If shrink tubing of too large size is used, it will, in fact, not shrink down to the wire for a nice neat joint. Roger ________________________________ Message 6 _____________________________________ Time: 06:38:09 PM PST US Subject: AeroElectric-List: Re: Jhp 520 PTT cable From: "Turbo_Boss" I have a JRC 520 and the external PTT work when you ground it. Here is the HEADSET and PTT schematics Read this topic online here: http://forums.matronics.com/viewtopic.php?p=338485#338485 Attachments: http://forums.matronics.com//files/jrc_500_520_headset_and_ptt_schematics_189.jpg ________________________________ Message 7 _____________________________________ Time: 08:56:09 PM PST US From: "DEAN PSIROPOULOS" Subject: AeroElectric-List: VM1000 sensor question Is there anyone who knows the ins and outs of the VM1000 B&W engine monitor system. When I originally bought mine 10 years ago I ordered it for a carbureted engine. The engine I finally installed has fuel injection which has higher fuel pressure than a carb engine. The VM1000 display shows fuel pressure pegged and flashing at 10 PSI. I thought that the only thing that might be required to fix this was a software change but a friend suggested I might need a new sensor with a higher range as well. Would anybody know about this, did VM use two different fuel pressure sensors? What brand and model number of sensor were they? My sensor is a fancy 4 wire unit with a Hirschman connector. Since VM has been absorbed by JPI my unit is no longer supported (only the VM1000C units are still supported) and talking with JPI at Sun N Fun confirmed my suspicions that they bought VM to remove one of their competitors from the market. That being the case, I obviously can't get a software update for the DPU but I might be able to recalibrate the unit to get some useful information by putting a resistor in parallel with the sensor to have the 0-10 PSI on the display correspond to 0-30 PSI at the sensor. Anyone know the guy who invented the VM1000? Does he, or anyone who used to work at VM, have knowledge, software source code, assemblers, compilers or PROM burner for the legacy system? Maybe they lurk on the list and could help with modifying the software to get my pressure display to work properly? Just a thought, if I had the tools and software I'd be willing to support this thing for anybody who has one. Thanks. Dean Psiropoulos RV-6A N197DM 2.5 years of fun so far ________________________________ Message 8 _____________________________________ Time: 10:04:46 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Connectors for small diameter 'coax" wires At 07:45 PM 4/29/2011, you wrote: > >I know about the existence of connectors for RG0400-like coax >cables, but are there similar connectors for small diameter wires >like 18AWG shielded Tefzel wires? I hate the resulting "lump" in the >wire when I try to connect shield and core wires using butt-splice >connectors, and the shrink-wrap never seems to contract nicely >around the wires afterwards. Are you talking about coax connectors? Yes, virtually every series of connector is available tailored to a particular coax. The problem is having tools for crimped connectors. I've never found it useful to expand the line of tools for a situation that turns up once every couple of years. Consider this work-around I published for another 'coax down sizing' issue some years ago. http://www.aeroelectric.com/articles/RG58/RG58.html In years past, I've also 'jeeped' a standard UG88 BNC connector onto a smaller diameter coax and then potted the wire into the back of the connector with epoxy. If you had a hundred of these joints to make, yeah, go buy the tools and right connectors. If you've got a couple . . . there are practical work-arounds. 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