Furuno Radar Problem
 

In article ,
"Lynn Coffelt" wrote:

Oh, for gosh sakes, I thought as an "Old Timer", I'd seen or heard of
everything!
I've never seen that bearing froze up!
Thanks for reporting back.

Old Chief Lynn


That really makes no sense Lynn. If the Bearing was froze, the antenna
wouldn't Rotate, and it wuld be evident externally. Now if the Rotory
Joint was froze, the Alignment Keeper on the top of the T/R Pan, would
have to be missing, or broken to allow for the miss-alignment of the two
Flanges. It should only give a very narrow widow of passable RF. Just
a couple of degrees, plus or minus, at each correct alignment.

If the later, is the case, then I am with you, very strange occurance,
indeed.....


Bruce in alaska that would be one for the Books.......




"Sun Dragon" wrote in message
...
Thanks for the replies, I took the scanner unit apart and found the
problem
to be the waveguide coupling bearing was siezed up. Because the waveguide
is
rectangular in shape and oriented with the long dimension fore and aft
produced the target display problem of not seeing targets port and stbd!

thanks again.


"Sun Dragon" wrote in message
...
I have a small Furuno radar where the echo return image is missing on the
left and right portion of the screen. The fore and aft images are fine.

I suspect the "brushes" or slip rings in the scanner unit are worn in
the
2 o clock thru 4 o clock and the 8 o clock thru 10 o clock regions.
Am i correct in this assumption and if so, are kits available to renew
the
contacts in the scanner?

Thanks,

Capt J. Vincent Collins
Master Oceans
F/V Sun Dragon





--
add a 2 before @

Furuno Radar Problem
 

"Bruce in Alaska" wrote in message
...
In article ,
"Lynn Coffelt" wrote:

Oh, for gosh sakes, I thought as an "Old Timer", I'd seen or heard of
everything!
I've never seen that bearing froze up!
Thanks for reporting back.

Old Chief Lynn


That really makes no sense Lynn. If the Bearing was froze, the antenna
wouldn't Rotate, and it wuld be evident externally. Now if the Rotory
Joint was froze, the Alignment Keeper on the top of the T/R Pan, would
have to be missing, or broken to allow for the miss-alignment of the two
Flanges. It should only give a very narrow widow of passable RF. Just
a couple of degrees, plus or minus, at each correct alignment.

If the later, is the case, then I am with you, very strange occurance,
indeed.....


Bruce in alaska that would be one for the Books.......


Yup, once in a while the scanner bearing seal or water in the motor
housing would let the scanner main bearing get corroded or filled with gunky
stuff, but never saw the rotating joint freeze up!
I have, a couple of times, managed to successfully break, bend or
otherwise defeat the waveguide alignment scheme. Targets were not all that
lively, and wiped out the crystals in fairly short order. Probably didn't do
the maggie too much good either. Head hanging in shame. Again.

Old Chief Lynn

Furuno Radar Problem
 

Lynn Coffelt wrote:
"Bruce in Alaska" wrote in message
...
In article ,
"Lynn Coffelt" wrote:

Oh, for gosh sakes, I thought as an "Old Timer", I'd seen or heard of
everything!
I've never seen that bearing froze up!
Thanks for reporting back.

Old Chief Lynn

That really makes no sense Lynn. If the Bearing was froze, the antenna
wouldn't Rotate, and it wuld be evident externally. Now if the Rotory
Joint was froze, the Alignment Keeper on the top of the T/R Pan, would
have to be missing, or broken to allow for the miss-alignment of the two
Flanges. It should only give a very narrow widow of passable RF. Just
a couple of degrees, plus or minus, at each correct alignment.

If the later, is the case, then I am with you, very strange occurance,
indeed.....


Bruce in alaska that would be one for the Books.......


Yup, once in a while the scanner bearing seal or water in the motor
housing would let the scanner main bearing get corroded or filled with gunky
stuff, but never saw the rotating joint freeze up!
I have, a couple of times, managed to successfully break, bend or
otherwise defeat the waveguide alignment scheme. Targets were not all that
lively, and wiped out the crystals in fairly short order. Probably didn't do
the maggie too much good either. Head hanging in shame. Again.

Old Chief Lynn



That's what you get when you don't use a good brand of relative
bearing grease!
g

Furuno Radar Problem
 

In article ,
"Lynn Coffelt" wrote:

"Bruce in Alaska" wrote in message
...
In article ,
"Lynn Coffelt" wrote:

Oh, for gosh sakes, I thought as an "Old Timer", I'd seen or heard of
everything!
I've never seen that bearing froze up!
Thanks for reporting back.

Old Chief Lynn


That really makes no sense Lynn. If the Bearing was froze, the antenna
wouldn't Rotate, and it wuld be evident externally. Now if the Rotory
Joint was froze, the Alignment Keeper on the top of the T/R Pan, would
have to be missing, or broken to allow for the miss-alignment of the two
Flanges. It should only give a very narrow widow of passable RF. Just
a couple of degrees, plus or minus, at each correct alignment.

If the later, is the case, then I am with you, very strange occurance,
indeed.....


Bruce in alaska that would be one for the Books.......


Yup, once in a while the scanner bearing seal or water in the motor
housing would let the scanner main bearing get corroded or filled with gunky
stuff, but never saw the rotating joint freeze up!
I have, a couple of times, managed to successfully break, bend or
otherwise defeat the waveguide alignment scheme. Targets were not all that
lively, and wiped out the crystals in fairly short order. Probably didn't do
the maggie too much good either. Head hanging in shame. Again.

Old Chief Lynn



No shame required, I amagine that it just wasn't totally thought thru...
and I actually went over and looked it up in the Service Manual.....

Bruce in alaska
--
add a 2 before @

Furuno Radar Problem
 

.. Yup, once in a while the scanner bearing seal or water in the
motor
housing would let the scanner main bearing get corroded or filled with
gunky
stuff, but never saw the rotating joint freeze up!
I have, a couple of times, managed to successfully break, bend or
otherwise defeat the waveguide alignment scheme. Targets were not all
that
lively, and wiped out the crystals in fairly short order. Probably
didn't do
the maggie too much good either. Head hanging in shame. Again.

Old Chief Lynn



That's what you get when you don't use a good brand of relative
bearing grease!
g

Good grief, is that something made from aunts or cousins?..........
ducking...............

OCL

Furuno Radar Problem
 

"Lynn Coffelt" wrote in news:heWdneG_8-
:

That's what you get when you don't use a good brand of relative
bearing grease!
g

Good grief, is that something made from aunts or
cousins?..........
ducking...............

OCL


Our SPS-6 aboard USS Everglades (AD-24 may she rest in peace) ran on a
pair of Fallopian tubes. Every new ET aboard was sent down to After GSK
with a supply chit in his hands for a new pair for the radar as soon as
possible, to welcome him aboard.

The supply guys in After GSK were in on it. They'd act non-interested
and take the paperwork, stamping it properly, then go in the back and cut
off two 6" lengths of rubber surgical hose specially planted for the
newbie ETs. Of course, they'd make him SIGN for the new tubes before
leaving so we could publish proof of his stupidity in the ship's next
newspaper...(c;

There were two fittings on the SPS-6 antenna mount and one on the
Raytheon Pathfinder's mount that required relative bearing grease. It
came in a green government tube marked "Jelly, Petroleum" from Forward
GSK, a different series of ladders into the bilge level storeroom in the
bow.

Between the bogus supply runs and the mail bouy watch on the bullnose,
after a couple of weeks, it was real hard, for some reason, to get young,
green technicians to make any real supply runs....Until that time, it was
great fun!

Larry ET1
Supervisor - Shop 67B - Metrology Laboratory
USS Everglades (AD-24) '66-'69
Cruisin' the Med for Uncle Sam

Furuno Radar Problem
 

A roll of aluminum foil and a "green" deckhand made for good humor, I would
instruct the deckhand to wrap himself in foil, stand upon the foredeck, as
we would command him to hold himself in rather odd body positions while the
chief and myself up in the wheelhouse "tuned" the radar. If possible we
would do this in port, prefferably so the crews of other vessels could be
witness to the charade. The tinfoil hat was always the crowd pleaser.



"Larry" wrote in message
...
"Lynn Coffelt" wrote in news:heWdneG_8-
:

That's what you get when you don't use a good brand of relative
bearing grease!
g

Good grief, is that something made from aunts or
cousins?..........
ducking...............

OCL


Our SPS-6 aboard USS Everglades (AD-24 may she rest in peace) ran on a
pair of Fallopian tubes. Every new ET aboard was sent down to After GSK
with a supply chit in his hands for a new pair for the radar as soon as
possible, to welcome him aboard.

The supply guys in After GSK were in on it. They'd act non-interested
and take the paperwork, stamping it properly, then go in the back and cut
off two 6" lengths of rubber surgical hose specially planted for the
newbie ETs. Of course, they'd make him SIGN for the new tubes before
leaving so we could publish proof of his stupidity in the ship's next
newspaper...(c;

There were two fittings on the SPS-6 antenna mount and one on the
Raytheon Pathfinder's mount that required relative bearing grease. It
came in a green government tube marked "Jelly, Petroleum" from Forward
GSK, a different series of ladders into the bilge level storeroom in the
bow.

Between the bogus supply runs and the mail bouy watch on the bullnose,
after a couple of weeks, it was real hard, for some reason, to get young,
green technicians to make any real supply runs....Until that time, it was
great fun!

Larry ET1
Supervisor - Shop 67B - Metrology Laboratory
USS Everglades (AD-24) '66-'69
Cruisin' the Med for Uncle Sam

Furuno Radar Problem
 

"Sun Dragon" wrote in
:

A roll of aluminum foil and a "green" deckhand made for good humor, I
would instruct the deckhand to wrap himself in foil, stand upon the
foredeck, as we would command him to hold himself in rather odd body
positions while the chief and myself up in the wheelhouse "tuned" the
radar. If possible we would do this in port, prefferably so the crews
of other vessels could be witness to the charade. The tinfoil hat was
always the crowd pleaser.




Darn. I never saw that trick.....(c; Thanks.

Bored to tears crossing the Atlantic for Naples at our breakneck speed of
17 knots, some of the boys in the DASH helo hanger got the bright idea to
screw with the CIC watch (an oxymoron in a tender with 2 3" cannons the
gummer's mates have to break out the manual to fire). They built a tin
foil kite out of Reynolds Wrap stolen from the galley, a really nice box
kite with fiberglass spars. The DASH helo deck was above our fantail and
a great place at sea to fly kites, which up to this point was no problem.
They had about 3 miles of some exotic monofilament line with an amazing
tensile strength, but little weight/mile.

After darken ship (why we did that was always a mystery), when you
couldn't see it, they flew the kite behind Everglades and payed out lots
of this tiny line. The kite was quite large and had a lot of lift. It
would fly back until you could hardly see it, its line seemingly trailing
off to nowhere. Flying above the fantail watch, who was looking at the
horizon, not for the Luftwaffe above, he reported nothing. Not so the
radar operator in CIC. He sounded the alarm of a UFO trailing the ship
on the Raytheon Pathfinder (SPS-21) display at about 2 miles. The watch
reported no sighting as the kite was too far away by the time he looked
for it. The ship's log was duly noted and everyone aboard, mostly the
enlisted ratings who knew all about what was going on, was told to keep a
sharp eye.

Every night, for over a week, this "thing" would show up on radar in the
dark and trail the ship for hours...Then, just after midnight, it would
approach the ship and disappear, suddenly, off the radar less than a mile
away, undetectable.

Finally discovered what it was by the Comm Officer who observed its
launch from the deck outside Radio Central one night, the jig was up.
The airdales on the helo deck apologized and said they'd been flying many
kites. This one was just new. They pleaded innocent, which they
weren't. Our captain decided it was a great test of CIC efficiency, an
unintended drill of great success. The kite continued to fly, but with a
new Saran Wrap covering that was radar transparent, compliments of the
Chief Radarman and cooks....(c;



Larry
--
VIRUS ALERT! VISTA has been released!
NOONE will be spared!

Furuno Radar Problem
 

snip
Our SPS-6 aboard USS Everglades (AD-24)...

Sea stories? Oh boy! Now this one is a no ****ter. In 1965, up on one
of the westernmost islands in the Aleutian chain, we used to send guys
outside with a compass, a pair of binoculars, and a notepad, to watch
for the Russians making overflights.

They were told the aircraft would be either GU11's or B1RD's and to note
the number of aircraft in the flight, relative bearing, and approximate
distance. Sometimes we'd use two guys and one of them would be a runner
to bring the reports back in where they were plotted and tracked on a map.

Jack

--
Jack Erbes in Ellsworth, Maine, USA (jackerbes at adelphia dot net)
(also receiving email at jacker at midmaine dot com)

Furuno Radar Problem
 

Jack Erbes wrote in news:1
:

GU11's or B1RD's and to note

If you ever get access to a milspec AN/xxxxx chart that shows what the
letters stand for in AN/ electronics, look up:

AN/ABB-(put your fav number-letter here)

ABB amounts to the model designation for a carrier pidgeon....(c;

Just to see if anyone ever really READ the data from a 2Kilo, we did some
maintenance on AN/ABB-3A, S/N B283845 located at the frame number/deck
level of our flag storage locker atop the main deckhouse. We even turned
in 2Kilos announcing we had completed Field Changes 1 through 12, but not
13, 14 or 15 due to deployment (we hardly left the dock as a tender).

The computer added it to the ship's equipment listing on the Z-fold
printout and listed it as needing 6-month updates, which we always filled
out 2Kilos for and turned into the 2Kilo center...trying to keep a
straight face.

I often wondered what the decommissioning outcome was when they couldn't
locate this expensive piece of equipment to toss into the dumpster. We
never reported he died or was lost at sea flying back to Charleston...(c;

Oh, obviously, noone ever actually READ any reports we sent in.....

Larry
--
VIRUS ALERT! VISTA has been released!
NOONE will be spared!