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Need help with Narco LORAN LRN 840
TxSrv schrieb:
I have an LRN-820, and the pinout may be the same. Looking at the back, top row of pins (L to R) are 1-12; bottom are A-N. GND is H & J (there is no I pin). +14/28v is pin 7. Use a multimeter to verify. GND will be a dead short to the case. Measure +V in to GND: with multimeter set on high resistance, turning switch on should cause the meter to show an increasing resistance reading until an electrolytic capacitor fully charges. Feed in +V thru a 2-3 amp fuse for insurance. Current draw on the 820 is .5A at 14V; .25A at 28V. Thank you very much! This was the information I was looking for... It probably also requires an amplified antenna. Did you get a little amplifier box which is inserted (near antenna end) in the coax to the antenna? Sadly, no, just the base unit. But it's not for use in an airplane any more but just for the fun of it, so that's not a problem at all. Thanks again! Benjamin |
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Need help with Narco LORAN LRN 840
Pins A-F: Not used
Pins H-J: GND Pin K: + LEFT Pin L: Not used Pin M: - NAV FLAG Pin N: Digital data common Pins 1-6: Not used Pin 7: + 14/28 VDC power in Pin 8: Not used Pin 9: + RIGHT Pin 10: Not used Pin 11: + NAV FLAG Pin 12: Digital data out Benjamin Gawert wrote: I got an old NARCO LRN-840 LORAN-C that I want to reanimate. Sadly I only got the unit itself, no manuals or cables. What I need is a pinout of the rear card-edge connector and informations about what voltage it requires etc. If someone has a manual as pdf or any other electronic format it would be great if he'd mail that to me. Benjamin |
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Need help with Narco LORAN LRN 840
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