---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Mon 02/17/03: 12 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:15 AM - Re: Marking wires made easier (John Slade) 2. 07:12 AM - OT: WTB: VSI (Jon Finley) 3. 09:04 AM - Re: Mic wiring (Rob Housman) 4. 09:33 AM - Re: Mic wiring (BobsV35B@aol.com) 5. 09:50 AM - Stereo Headsets (Stucklen, Frederic IFC) 6. 09:57 AM - Re: Mic wiring (Rob Housman) 7. 11:09 AM - Re: PTT Wiring (Robert L. Nuckolls, III) 8. 12:55 PM - Re: Van's ammeter & E-Bus (James Foerster) 9. 01:14 PM - shield pigtail (Shannon Knoepflein) 10. 07:52 PM - AMP CPC or Equivalent Connectors (John Schroeder) 11. 09:14 PM - Re: AMP CPC or Equivalent Connectors (HCRV6@aol.com) 12. 09:31 PM - Re: PTT Wiring (Don Boardman) ________________________________ Message 1 _____________________________________ Time: 06:15:43 AM PST US From: "John Slade" Subject: RE: AeroElectric-List: Marking wires made easier --> AeroElectric-List message posted by: "John Slade" > While its cool to be able write on shrink wrap tube, I can never > remember to put the tube on before the connector. Thank you, Rob. I thought it was just me. I've wasted quite a few connectors that way too. John Slade Cozy IV ________________________________ Message 2 _____________________________________ Time: 07:12:25 AM PST US From: "Jon Finley" Subject: AeroElectric-List: OT: WTB: VSI --> AeroElectric-List message posted by: "Jon Finley" Sorry for being so off-topic. Anyone have a used 3-1/8" 0-3000 (or more) VSI that they want to sell (cheap - hopefully)?? I know the cheap UMA units run about $110.00. If so, please reply directly to me: jon@finleyweb.net Thanks, Jon DO NOT ARCHIVE ________________________________ Message 3 _____________________________________ Time: 09:04:06 AM PST US From: "Rob Housman" Subject: RE: AeroElectric-List: Mic wiring --> AeroElectric-List message posted by: "Rob Housman" PS Engineering does manufacture for others, and definitely makes the UPS SL-10. The UPS warranty on the unit specifically states that "If the unit is being installed by a non-certified individual in an experimental aircraft, a factory-made harness must be used for the warranty to be valid. This harness may be purchased directly from PS Engineering...." Garmin makes no mention in their warranty of either requiring a factory made harness or that the GMA-340 is manufactured by others. The only warranty restriction mentioned on the Garmin Web site concerns units purchased through on-line auctions - and that restriction applies only to verification of the purchase for which they will require an original sales receipt, presumably from original sale to the auction seller . Best regards, Rob Housman Europa XS Tri-Gear A070 Airfarame complete Irvine, CA -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of Robert L. Nuckolls, III Subject: Re: AeroElectric-List: Mic wiring --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" At 02:13 PM 2/14/2003 -0500, you wrote: >--> AeroElectric-List message posted by: John Schroeder > > >Bob - > >I was told by an avionics supplier that PS Engineering makes the >audio/intercomm >boxes for Garmin and UPS. The rationale is that they couldn't do it any >better >or cheaper. Is this true? Probably . . . a company that does a high volume of audio specialty components can probably do a better job for less money that one that butters their bread with high-dollar, lower volume nav or communications equipment. Bob . . . ________________________________ Message 4 _____________________________________ Time: 09:33:48 AM PST US From: BobsV35B@aol.com Subject: Re: AeroElectric-List: Mic wiring --> AeroElectric-List message posted by: BobsV35B@aol.com Good Morning All, Considering the amount of discussion on this site concerning the merits of the PS Engineering offerings, I wonder if there is any information available about the units made by Northern Airborne Technology, Ltd. They are advertising a panel mounted combination audio selector panel and intercom, the AMS50 Premium Audio Control, which appears to be very similar to the PS Engineering PMA 7000B. I have no idea as to how the price compares. Does anyone on this list have any comments, pro or con? Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator ________________________________ Message 5 _____________________________________ Time: 09:50:56 AM PST US From: "Stucklen, Frederic IFC" Subject: AeroElectric-List: Stereo Headsets --> AeroElectric-List message posted by: "Stucklen, Frederic IFC" I just completed wiring my new RV-6A with a stereo audio panel (SL-10SM), PXE7300 AM,FM, CD player and stereo headsets. The standard 1/4" stereo jacks are what is required (available from Radio Shack and other places). This jack will work for both stereo and mono applications....... Fred Stucklen RV-6A N926RV Reserved I would like to wire my plane so that either mono or stereo headsets can be used. What plug/jack is used for stereo? I'me gessing its a tip-ring-sleeve version of the same diameter jack as the mono. Do you have to put in both jacks or what? Jim Bean building RV-8 ________________________________ Message 6 _____________________________________ Time: 09:57:05 AM PST US From: "Rob Housman" Subject: RE: AeroElectric-List: Mic wiring --> AeroElectric-List message posted by: "Rob Housman" More bad news. NAT's warranty includes this exception: "The warranty shall be void if the equipment is not installed by an authorized NAT approved Dealer in accordance with the installation instructions of NAT...." More details at http://www.northernairborne.com/warranty.html Best regards, Rob Housman Europa XS Tri-Gear A070 Airfarame complete Irvine, CA -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of BobsV35B@aol.com Subject: Re: AeroElectric-List: Mic wiring --> AeroElectric-List message posted by: BobsV35B@aol.com Good Morning All, Considering the amount of discussion on this site concerning the merits of the PS Engineering offerings, I wonder if there is any information available about the units made by Northern Airborne Technology, Ltd. They are advertising a panel mounted combination audio selector panel and intercom, the AMS50 Premium Audio Control, which appears to be very similar to the PS Engineering PMA 7000B. I have no idea as to how the price compares. Does anyone on this list have any comments, pro or con? Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator ________________________________ Message 7 _____________________________________ Time: 11:09:16 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: PTT Wiring --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" At 07:42 PM 2/16/2003 -0500, you wrote: >--> AeroElectric-List message posted by: Don Boardman > >Hi Bob, > >I found out today that connecting the PTT wires at the AP/intercom is not >practical. Physically it has been a challenge to solder the 25 conductors >and their associated shields to the units connector. Holding the three >conductors and the shield, with minimal protrusion from the cable end, in >position to the pins is tough enough without trying to add the PTT >conductors. I will make the connections at the jacks. There are no great benefits to be derived from "minimizing" unshielded conductors in a bundle with lots of shielded wires. If you have a 25 pin connector, there's no reason to take more than 25 UNSHIELDED conductors into the backshell for termination on the pins. If this means 2-4" of "exposed" conductors, no big deal. Daisy chain the shields together as shown in http://www.aeroelectric.com/articles/pigtail/pigtail.html and bring a common shield pigtail into the connector backshell. If you stager the shield terminations so that they don't all happen at the same station on length of wire bundle, then the finished product can appear quite "slim" after all the dust settles. Which brings me back to an oft repeated admonition, "follow the instructions" . . . the folks who publish them have tried it all out and can offer assurances that it will work. If they want all the shields brought to ground at pin-x in the connector, it doesn't need to be difficult. Bob . . . ________________________________ Message 8 _____________________________________ Time: 12:55:50 PM PST US From: "James Foerster" Subject: AeroElectric-List: RE: Van's ammeter & E-Bus --> AeroElectric-List message posted by: "James Foerster" Richard Dudley, The Van's ammeter likely has an op amp which cannot take any input outside of the power supply range of the circuit. The diode drop from the E buss can be compensated, though. If you take a diode in series with a 10K resistor from each end of the current shunt, you will get the common mode voltage from the shunt within range. To be sure, you might use two diodes in series with the 10K resistor. The input to the ammeter would be the diode-resistor junction from these two strings of diodes and resistor. If Van's had used a current mode op amp such an LM3900, this would not be a problem. Would anyone be interested in a circuit that would take the output of a 50 mv shunt and reference it to ground? Should be cheap, and run a few square inches. Input from shunt, output to meter, with ground and 12 v power using pc board FASTON connectors? Jim Foerster ________________________________ Message 9 _____________________________________ Time: 01:14:52 PM PST US From: "Shannon Knoepflein" Subject: AeroElectric-List: shield pigtail --> AeroElectric-List message posted by: "Shannon Knoepflein" Is it absolutely imperative that you connect a pigtail to the shield, or is it possible/acceptable to twist the shield and crimp a pin to it and insert it directly into the plug? --- Shannon Knoepflein <---> kycshann@kyol.net -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L. Nuckolls, III Subject: Re: AeroElectric-List: PTT Wiring --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" At 07:42 PM 2/16/2003 -0500, you wrote: >--> AeroElectric-List message posted by: Don Boardman > >Hi Bob, > >I found out today that connecting the PTT wires at the AP/intercom is not >practical. Physically it has been a challenge to solder the 25 conductors >and their associated shields to the units connector. Holding the three >conductors and the shield, with minimal protrusion from the cable end, in >position to the pins is tough enough without trying to add the PTT >conductors. I will make the connections at the jacks. There are no great benefits to be derived from "minimizing" unshielded conductors in a bundle with lots of shielded wires. If you have a 25 pin connector, there's no reason to take more than 25 UNSHIELDED conductors into the backshell for termination on the pins. If this means 2-4" of "exposed" conductors, no big deal. Daisy chain the shields together as shown in http://www.aeroelectric.com/articles/pigtail/pigtail.html and bring a common shield pigtail into the connector backshell. If you stager the shield terminations so that they don't all happen at the same station on length of wire bundle, then the finished product can appear quite "slim" after all the dust settles. Which brings me back to an oft repeated admonition, "follow the instructions" . . . the folks who publish them have tried it all out and can offer assurances that it will work. If they want all the shields brought to ground at pin-x in the connector, it doesn't need to be difficult. Bob . . . ________________________________ Message 10 ____________________________________ Time: 07:52:53 PM PST US From: John Schroeder Subject: AeroElectric-List: AMP CPC or Equivalent Connectors --> AeroElectric-List message posted by: John Schroeder Anyone have a good source for the thru-firewall 39 pin or 24 pin (thereabouts) electrical connectors? Finding any data on AMP CPC connectors or a supplier is difficult. Thanks, John Schroeder LNCE ________________________________ Message 11 ____________________________________ Time: 09:14:05 PM PST US From: HCRV6@aol.com Subject: Re: AeroElectric-List: AMP CPC or Equivalent Connectors --> AeroElectric-List message posted by: HCRV6@aol.com Try calling Tyco Electronics Technical Support Center at 1-800-522-6752. Ask them to send you Amp catalog #82021, it has detailed info on the CPC line of connectors as well as the metal shell connectors that might be more appropriate for use in the firewall. When you are ready to buy, try Mouser Electronics, 1-800-346-6873 or www.mouser.com. You might have to get Mouser to send you their catalog. Harry Crosby Pleasanton, California RV-6, starting firewall forward ________________________________ Message 12 ____________________________________ Time: 09:31:43 PM PST US Subject: Re: AeroElectric-List: PTT Wiring From: Don Boardman --> AeroElectric-List message posted by: Don Boardman Bob, Thanks for the reply. I had a copy of your shield termination technique but it did not seem to apply in this application. The connections where solder connections. The schematic also showed each shield terminated at the same pin as the ground or "Lo" (as it was labeled) for each three (mic) or two (phone) conductor shielded cable. I did follow the manufacturer's instructions (I agree they should know best) and terminated (soldered) the Lo and the shield to the indicated pin. Back at it tomorrow, Don > From: "Robert L. Nuckolls, III" > Reply-To: aeroelectric-list@matronics.com > Date: Mon, 17 Feb 2003 13:08:11 -0600 > To: aeroelectric-list@matronics.com > Subject: Re: AeroElectric-List: PTT Wiring > > --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" > > > At 07:42 PM 2/16/2003 -0500, you wrote: >> --> AeroElectric-List message posted by: Don Boardman >> >> Hi Bob, >> >> I found out today that connecting the PTT wires at the AP/intercom is not >> practical. Physically it has been a challenge to solder the 25 conductors >> and their associated shields to the units connector. Holding the three >> conductors and the shield, with minimal protrusion from the cable end, in >> position to the pins is tough enough without trying to add the PTT >> conductors. I will make the connections at the jacks. > > There are no great benefits to be derived from > "minimizing" unshielded conductors in a bundle > with lots of shielded wires. > > If you have a 25 pin connector, there's no reason > to take more than 25 UNSHIELDED conductors into the > backshell for termination on the pins. > > If this means 2-4" of "exposed" conductors, > no big deal. Daisy chain the shields together > as shown in > > http://www.aeroelectric.com/articles/pigtail/pigtail.html > > and bring a common shield pigtail into the connector > backshell. If you stager the shield terminations > so that they don't all happen at the same station > on length of wire bundle, then the finished product > can appear quite "slim" after all the dust settles. > > Which brings me back to an oft repeated admonition, > "follow the instructions" . . . the folks who publish > them have tried it all out and can offer assurances > that it will work. If they want all the shields brought > to ground at pin-x in the connector, it doesn't > need to be difficult. > > Bob . . . > > > > > >