Need help with Narco LORAN LRN 840

[Benjamin Gawert]

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

[Jim Macklin]

Google returned these...
Classified Ads ... standard six pack inst; KMA ZOTSO sound
panel; Narco LRN 840 Loran C; King KY 197 TSO Com; ... Loran
C - NARCO CP136. NARCO M12D Navcom, King ADF KR86. ...
www.navionsociety.org/
Classified_Ads/classified_ads.html - 26k - Cached - Similar
pages


Narco LRN Series Narco LRN-840 Loran-C Nav. System
Installation/Operation Manual 1986 · Narco LRN-840 Loran-C
Nav. System Installation/Operation Manual 1986 ...
www.esscoaircraft.com/Narco_LRN_Series_s/2081.htm -
47k - Cached - Similar pages


Essco Aircraft Manuals and Pilot Supplies. We are the
Aircraft ... 30374, Narco LRN-840 Loran-C Nav. System
Installation/Operation Manual 1986. 2092, Narco Mark 12
Squelch Modification Maintenance Manual ...
www.esscoaircraft.com/pindex.asp?offset=8000 -
102k - Cached - Similar pages


Central Air Parts Inc., Aircraft GPS & Loran ... KING,
LORAN, 8002, $50.00. MICRO LOGIC, LORAN, ML-6500, $75.00.
NARCO, LORAN, LRN-840, $150.00. ROSS, LORAN, LCA-200,
$75.00. STS, LORAN, C-110, $50.00. TEXAS ...
www.cent-air.com/gps.htm - 18k - Supplemental Result -
Cached - Similar pages


EASTERN AVIONICS INTERNATIONAL, INC. 8000 Skylane Way USA
(941)637 ... ... LRN-840 U LORAN C, 200 WP, RTE, $789 -
$1105 1 CDI, NAV, POS, GRI, DB! ... W/ANT/VFR ONI ONI-7000 U
OFFSHORE NAV ULTIMATE $14559 - $20383 1 LORAN C, ...
www.avionix.com/inventory.txt - 469k - Cached -
Similar pages


Buy Narco ... glideslope, C $1,227.88. C $1,968.31. -. USA.
Listing has pictures. NARCO- LRN-840 LORAN C NAVIGATION
RECEIVER, C $15.43. 2. USA. Listing ...
narco.bid-on-auctions.ca/ - 101k - Supplemental
Result - Cached - Similar pages








Also check with EAA and your local avionics shop.




--
James H. Macklin
ATP,CFI,A&P

--
The people think the Constitution protects their rights;
But government sees it as an obstacle to be overcome.
some support
http://www.usdoj.gov/olc/secondamendment2.htm
See http://www.fija.org/ more about your rights and duties.



"Benjamin Gawert" > wrote in message
...
|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

[Benjamin Gawert]

Jim Macklin schrieb:

> Google returned these...

[snipped Google results]

Thanks, but that doesn't help me much. I already did a search with
Google but sales ads for aircrafts that have such a LORAN device aren't
really helpful. And buying a manual for a price that is more than this
unit is worth is also not an option.

So if someone out there does have a Narco LRN-840 and a manual please
check out the connector pinout and post it here.

Benjamin

[Jim Macklin]

Did you contact the EAA, they have a big library.



"Benjamin Gawert" > wrote in message
...
| Jim Macklin schrieb:
|
| > Google returned these...
|
| [snipped Google results]
|
| Thanks, but that doesn't help me much. I already did a
search with
| Google but sales ads for aircrafts that have such a LORAN
device aren't
| really helpful. And buying a manual for a price that is
more than this
| unit is worth is also not an option.
|
| So if someone out there does have a Narco LRN-840 and a
manual please
| check out the connector pinout and post it here.
|
| Benjamin

[Benjamin Gawert]

Jim Macklin schrieb:

> Did you contact the EAA, they have a big library.

Nope, because in former such cases I only got an advise to ask the
manufacturer.

Benjamin

[Dave S]

Benjamin Gawert wrote:
> Jim Macklin schrieb:
>
>> Google returned these...
>
>
> [snipped Google results]
>
> Thanks, but that doesn't help me much. I already did a search with
> Google but sales ads for aircrafts that have such a LORAN device aren't
> really helpful. And buying a manual for a price that is more than this
> unit is worth is also not an option.
>
> So if someone out there does have a Narco LRN-840 and a manual please
> check out the connector pinout and post it here.
>
> Benjamin

Actually, if you READ those google ads, you may notice that SOME are for
sales relating to the literature that you are looking for, not just
aircraft with them installed.

Eastern Avionics, in particular, will likely have what you are looking
for and email you a pinout for less than $20 total. Just in case nobody
happens to have a free copy laying around.

Also check out Ebay, GEBE's Estate Sale.. they have LOTS of old avionics
documentation and I have purchased several items from them in the past.
Again, the price may be quite reasonable (but not free...)

Dave

[Jim Macklin]

Former cases from the EAA? Are you a member? If not join?
It is not restricted to USA only.


"Benjamin Gawert" > wrote in message
...
| Jim Macklin schrieb:
|
| > Did you contact the EAA, they have a big library.
|
| Nope, because in former such cases I only got an advise to
ask the
| manufacturer.
|
| Benjamin

[Benjamin Gawert]

Dave S schrieb:

>> Thanks, but that doesn't help me much. I already did a search with
>> Google but sales ads for aircrafts that have such a LORAN device
>> aren't really helpful. And buying a manual for a price that is more
>> than this unit is worth is also not an option.
>>
>> So if someone out there does have a Narco LRN-840 and a manual please
>> check out the connector pinout and post it here.
>>
>> Benjamin
>
> Actually, if you READ those google ads, you may notice that SOME are for
> sales relating to the literature that you are looking for, not just
> aircraft with them installed.

Well, if YOU had READ my posting you probably would have noticed that I
know that some are selling manuals...

> Eastern Avionics, in particular, will likely have what you are looking
> for and email you a pinout for less than $20 total. Just in case nobody
> happens to have a free copy laying around.
>
> Also check out Ebay, GEBE's Estate Sale.. they have LOTS of old avionics
> documentation and I have purchased several items from them in the past.
> Again, the price may be quite reasonable (but not free...)

Well, the unit is old and I even don't know if it's working, so 20$ +
shipping + tax (if you look at my email address you might notice that
I'm not in the US) is simply too much just to get the pinout of a few pins.

Benjamin

[Benjamin Gawert]

Jim Macklin schrieb:

> Former cases from the EAA? Are you a member? If not join?
> It is not restricted to USA only.

I'm not a member, and paying the membership for a ~20yr old LORAN unit
is hardly worth it.

Benjamin

[TxSrv]

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.
>

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.

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?

Fred F.

[Jim Macklin]

That is your choice and problem, there is no free lunch.


"Benjamin Gawert" > wrote in message
...
| Jim Macklin schrieb:
|
| > Former cases from the EAA? Are you a member? If not
join?
| > It is not restricted to USA only.
|
| I'm not a member, and paying the membership for a ~20yr
old LORAN unit
| is hardly worth it.
|
| Benjamin

[[email protected]]

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

[Barney Rubble]

What an attitude from someone asking for help, sheesh.

"Benjamin Gawert" > wrote in message
...
> Dave S schrieb:
>
>>> Thanks, but that doesn't help me much. I already did a search with
>>> Google but sales ads for aircrafts that have such a LORAN device aren't
>>> really helpful. And buying a manual for a price that is more than this
>>> unit is worth is also not an option.
>>>
>>> So if someone out there does have a Narco LRN-840 and a manual please
>>> check out the connector pinout and post it here.
>>>
>>> Benjamin
>>
>> Actually, if you READ those google ads, you may notice that SOME are for
>> sales relating to the literature that you are looking for, not just
>> aircraft with them installed.
>
> Well, if YOU had READ my posting you probably would have noticed that I
> know that some are selling manuals...
>
>> Eastern Avionics, in particular, will likely have what you are looking
>> for and email you a pinout for less than $20 total. Just in case nobody
>> happens to have a free copy laying around.
>>
>> Also check out Ebay, GEBE's Estate Sale.. they have LOTS of old avionics
>> documentation and I have purchased several items from them in the past.
>> Again, the price may be quite reasonable (but not free...)
>
> Well, the unit is old and I even don't know if it's working, so 20$ +
> shipping + tax (if you look at my email address you might notice that I'm
> not in the US) is simply too much just to get the pinout of a few pins.
>
> Benjamin

[Benjamin Gawert]

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

[Benjamin Gawert]

schrieb:

> 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

Thank You very much for the pinout! That helps me a lot!

Benjamin

[Benjamin Gawert]

Jim Macklin schrieb:

> That is your choice and problem, there is no free lunch.

Well, at least two other people seem to think different and have no
problem passing the informations they already have to others that are
looking for it. Thankfully there are still people that do that. Im quite
active in several other groups, and people there also just share the
informations they have. You need a pinout? Just ask, and someone who has
it probably will tell you. Honestly I'm a bit surprised about the "if
you wanna know then go and buy the information" attitude here. Where's
the problem when people that have such an unit lying around or in use or
have the manual just to pass the informations?

I simply just see no reason to sign for a membership that costs much
more than this old unit is worth (and still doesn't gurantee that I get
the informations I need), or to buy a manual for a >20yr old worthless
LORAN unit that is in unknown condition just to get the pinout of the
rear connector, especially since this is just a project for curiosity
and also since LORAN probably isn't that common navigation system any
more so there are dozens of retired units around that have no real value
any more.

YMMV, though. Maybe it's ok for you to buy i.e. a 50$ manual to repair a
20$ radio, but don't expect everyone to do the same.

Benjamin

[Jim Macklin]

I understand your desire and appreciate that some people did
have the data you needed. But if they did not have that
data, your choice would be to drop the project or buy the
manual. You could even trace the circuits.

But you asked for a manual or data and I suggested a source
that was valid. You became rude because it was not free.
That is your problem, not mine. If you don't think that an
EAA membership is worth the money just for the magazine and
other functions, and all you'd get is the pin-outs, that is
again, your problem

Have a nice day.


"Benjamin Gawert" > wrote in message
...
| Jim Macklin schrieb:
|
| > That is your choice and problem, there is no free lunch.
|
| Well, at least two other people seem to think different
and have no
| problem passing the informations they already have to
others that are
| looking for it. Thankfully there are still people that do
that. Im quite
| active in several other groups, and people there also just
share the
| informations they have. You need a pinout? Just ask, and
someone who has
| it probably will tell you. Honestly I'm a bit surprised
about the "if
| you wanna know then go and buy the information" attitude
here. Where's
| the problem when people that have such an unit lying
around or in use or
| have the manual just to pass the informations?
|
| I simply just see no reason to sign for a membership that
costs much
| more than this old unit is worth (and still doesn't
gurantee that I get
| the informations I need), or to buy a manual for a >20yr
old worthless
| LORAN unit that is in unknown condition just to get the
pinout of the
| rear connector, especially since this is just a project
for curiosity
| and also since LORAN probably isn't that common navigation
system any
| more so there are dozens of retired units around that have
no real value
| any more.
|
| YMMV, though. Maybe it's ok for you to buy i.e. a 50$
manual to repair a
| 20$ radio, but don't expect everyone to do the same.
|
| Benjamin