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Koden MD-3600 Radar

 
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John Proctor

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Since: Mar 27, 2005
Posts: 19



(Msg. 1) Posted: Thu Jul 21, 2005 10:42 am
Post subject: Koden MD-3600 Radar
Archived from groups: rec>boats>electronics (more info?)

Group,

I've started back into marine electronics fitting and repair again. We
have an older scanner MRT-136) that is part of an MD-3600 radar system.
The radome got wet (yes Larry other manufacturers do get wet from time
to time). The owner want's us to have a look at it but the local Koden
distributor doesn't have any manuals going that far back. Does anyone
have a service manual or know of where I can find one for the scanner?

--
Regards,
John Proctor VK3JP, VKV6789
S/V Chagall

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Bruce in Alaska

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Since: Jun 24, 2004
Posts: 213



(Msg. 2) Posted: Thu Jul 21, 2005 9:27 pm
Post subject: Re: Koden MD-3600 Radar [Login to view extended thread Info.]
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In article <2005072120424116807%lost@nowhereorg>,
John Proctor <lost.DeleteThis@nowhere.org> wrote:

> Group,
>
> I've started back into marine electronics fitting and repair again. We
> have an older scanner MRT-136) that is part of an MD-3600 radar system.
> The radome got wet (yes Larry other manufacturers do get wet from time
> to time). The owner want's us to have a look at it but the local Koden
> distributor doesn't have any manuals going that far back. Does anyone
> have a service manual or know of where I can find one for the scanner?

If you have some experience with small commercial xband marine radars
you shouldn't need a manual to figure out what quit in the T/R Pan on a
Koden Radar. They are very similar in design to the JRC, as well as the
Furuno's of the same period. Take a scope and look for the TRansmitter
Trigger Pulses coming up the line from the display, and follow them thru
to the Modulator Switcher, and then check the RF output of the Magnitron
with an NE2 neon bulb. For receive, just see if you have noise comming
down the video coax from the IF amp, and monitor, either the Crystal
Current, or if this has a LNB, put your scope on the output of the LNB
and look for pulses and grass in between the pulses. Most of the old
hands have an Xband RF Test Box that can simulate Xband RF Target
Returns, to the antenna port, as well as minitor the RF output from the
cirulator. Having the right test equipment is essential in working in
the Marine Electronics Field.....



Bruce in alaska
--
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Lynn Coffelt

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Since: Jul 21, 2005
Posts: 125



(Msg. 3) Posted: Thu Jul 21, 2005 10:06 pm
Post subject: Re: Koden MD-3600 Radar [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

> Having the right test equipment is essential in working in
> the Marine Electronics Field.....
>
Hmmmm......... The guys that showed me the ropes used a Simpson 260 with a
battered leather case, an earphone and a wet finger. (Oh, yeah, as you
mentioned, an NE-2 taped to the end of a diddle stick)
Old Chief Lynn, Anacortes Marine Electronics (for 20 years)
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Me5

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Since: Jun 11, 2004
Posts: 68



(Msg. 4) Posted: Fri Jul 22, 2005 8:03 pm
Post subject: Re: Koden MD-3600 Radar [Login to view extended thread Info.]
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In article <dbput5$e3d$1@domitilla.aioe.org>,
"Lynn Coffelt" <coffelt2.TakeThisOut@comcast.net> wrote:

> Hmmmm......... The guys that showed me the ropes used a Simpson 260 with a
> battered leather case, an earphone and a wet finger. (Oh, yeah, as you
> mentioned, an NE-2 taped to the end of a diddle stick)
> Old Chief Lynn, Anacortes Marine Electronics (for 20 years)

What, you taped yours to a diddle stick??? We always just held them
in our fingers out in front of the waveguide flange..... Well not on
40Kw Decca 404's.... but all the rest.....

Hmmm, sounds like an old timer....The really good techs came from
Northern Radio, Radar Electric, and Raytheon Marine back in the 60's and
70's. I am an old Northern Man, and one of the few "Old Boys" left.
Don Hollingsworth Sr. is still around at G & L Marine, and he is a
Raytheon transplant. Billy Pulse came from the end of the era Radar
Electric shop. That's about it for that generation, that still practice
the "Art" of Marine Electronics. Same with the "Regulators". (FCC)
After the closing of RegionX in Kirkland, there just isn't anyone left
that really understands the Marine Mobile Radio Service. Bob Dietch,
Bob Zenes, Gary Solsby, Bill Johnson, and even Denny Anderson have all
retired.


Me getting old is a Bitch......all the good guys just die off....
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Doug9

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Since: Jan 29, 2004
Posts: 50



(Msg. 5) Posted: Fri Jul 22, 2005 11:44 pm
Post subject: Re: Koden MD-3600 Radar [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

"Lynn Coffelt" <coffelt2.TakeThisOut@comcast.net> wrote in message
news:dbput5$e3d$1@domitilla.aioe.org...
> > Having the right test equipment is essential in working in
> > the Marine Electronics Field.....
> >
> Hmmmm......... The guys that showed me the ropes used a Simpson 260 with a
> battered leather case, an earphone and a wet finger. (Oh, yeah, as you
> mentioned, an NE-2 taped to the end of a diddle stick)
> Old Chief Lynn, Anacortes Marine Electronics (for 20 years)
>
>
I learned it with two fingers and the length/color of the arc.
Old Senior Chief Doug
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Lynn Coffelt

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Since: Jul 21, 2005
Posts: 125



(Msg. 6) Posted: Fri Jul 22, 2005 11:44 pm
Post subject: Re: Koden MD-3600 Radar [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

"Doug" <dougm DeleteThis @rodgersmarine.com> wrote in message
news:ZxfEe.6657$dU3.4049@newsread2.news.pas.earthlink.net...
>
> "Lynn Coffelt" <coffelt2 DeleteThis @comcast.net> wrote in message
> news:dbput5$e3d$1@domitilla.aioe.org...
> > > Having the right test equipment is essential in working in
> > > the Marine Electronics Field.....
> > >
> > Hmmmm......... The guys that showed me the ropes used a Simpson 260 with
a
> > battered leather case, an earphone and a wet finger. (Oh, yeah, as you
> > mentioned, an NE-2 taped to the end of a diddle stick)
> > Old Chief Lynn, Anacortes Marine Electronics (for 20 years)
> >
> >
> I learned it with two fingers and the length/color of the arc.
> Old Senior Chief Doug

Oh, Wow! Doug, that technique was never taught at this outpost. But
studying, with crossed eyes, the arc reaching the tip of one's nose was
instructional.

Jerry Writer told me that you could count the number of "real" radar
techs on the West Coast on the fingers of one hand. Jim Manwaring was one of
them, were you one of the others?

Old Chief Lynn
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Doug9

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Since: Jan 29, 2004
Posts: 50



(Msg. 7) Posted: Fri Jul 22, 2005 11:53 pm
Post subject: Re: Koden MD-3600 Radar [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

No luck on that model Koden here, had some 3400 series stuff though. Try a
Sitex shop...they may have the Koden info.

Speaking of Bill Pulse...he bought up at the EchoTec remnants, drawings,
parts, etc., and now does flat rate repair on them from his firm Radar
Marine in Bellingham, WA.

Did you ever know Bill Halleck, Portland FCC Engineer in Charge? He retired
in the late 50s or early 60s.

Doug K7ABX

"Me" <Me RemoveThis @shadow.orgs> wrote in message
news:Me-83AF10.12035422072005@netnews.worldnet.att.net...
> In article <dbput5$e3d$1@domitilla.aioe.org>,
> "Lynn Coffelt" <coffelt2 RemoveThis @comcast.net> wrote:
>
> > Hmmmm......... The guys that showed me the ropes used a Simpson 260 with
a
> > battered leather case, an earphone and a wet finger. (Oh, yeah, as you
> > mentioned, an NE-2 taped to the end of a diddle stick)
> > Old Chief Lynn, Anacortes Marine Electronics (for 20 years)
>
> What, you taped yours to a diddle stick??? We always just held them
> in our fingers out in front of the waveguide flange..... Well not on
> 40Kw Decca 404's.... but all the rest.....
>
> Hmmm, sounds like an old timer....The really good techs came from
> Northern Radio, Radar Electric, and Raytheon Marine back in the 60's and
> 70's. I am an old Northern Man, and one of the few "Old Boys" left.
> Don Hollingsworth Sr. is still around at G & L Marine, and he is a
> Raytheon transplant. Billy Pulse came from the end of the era Radar
> Electric shop. That's about it for that generation, that still practice
> the "Art" of Marine Electronics. Same with the "Regulators". (FCC)
> After the closing of RegionX in Kirkland, there just isn't anyone left
> that really understands the Marine Mobile Radio Service. Bob Dietch,
> Bob Zenes, Gary Solsby, Bill Johnson, and even Denny Anderson have all
> retired.
>
>
> Me getting old is a Bitch......all the good guys just die off....
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krapchaa1

External


Since: Jan 28, 2005
Posts: 10



(Msg. 8) Posted: Sat Jul 23, 2005 8:51 am
Post subject: Re: Koden MD-3600 Radar [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

"Doug" <dougm.DeleteThis@rodgersmarine.com> wrote in message
news:ZxfEe.6657$dU3.4049@newsread2.news.pas.earthlink.net...
>
> "Lynn Coffelt" <coffelt2.DeleteThis@comcast.net> wrote in message
> news:dbput5$e3d$1@domitilla.aioe.org...
>> > Having the right test equipment is essential in working in
>> > the Marine Electronics Field.....
>> >
>> Hmmmm......... The guys that showed me the ropes used a Simpson 260 with
>> a
>> battered leather case, an earphone and a wet finger. (Oh, yeah, as you
>> mentioned, an NE-2 taped to the end of a diddle stick)
>> Old Chief Lynn, Anacortes Marine Electronics (for 20 years)
>>
>>
> I learned it with two fingers and the length/color of the arc.
> Old Senior Chief Doug
>
>

I saw the results of a MARS operator closing a TR relay in a Henry linear
one time using his fingers. Looked like a bbq hotdog.

+1 on the Simpson 260, digital meters don't see everything.

Andy (aging ETC Ret)
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Me5

External


Since: Jun 11, 2004
Posts: 68



(Msg. 9) Posted: Sat Jul 23, 2005 8:13 pm
Post subject: Re: Koden MD-3600 Radar [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

In article <UFfEe.6661$dU3.2119@newsread2.news.pas.earthlink.net>,
"Doug" <dougm.RemoveThis@rodgersmarine.com> wrote:

> Did you ever know Bill Halleck, Portland FCC Engineer in Charge? He retired
> in the late 50s or early 60s.
>
> Doug K7ABX

Nope, a bit before my time, for that far away from Seattle.... There was
a Peter Baliogen, and one other fellow, who's name escapes me, that were
RegionX guys from that era, but I only new one or two of the Portland
guys, and I can't really recall any of their names right off.. Used
to do a pile of SALAS Inspections with those guys every year, back before
Self Regulation came into being.... I still do a few for the Small
Passenger Ships that cruise around up here.....


Me who does reminis in his old age....
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Doug9

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Since: Jan 29, 2004
Posts: 50



(Msg. 10) Posted: Mon Jul 25, 2005 4:16 pm
Post subject: Re: Koden MD-3600 Radar [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

"Lynn Coffelt" <coffelt2.RemoveThis@comcast.net> wrote in message
news:dbs8fi$n90$1@domitilla.aioe.org...
>
>
> Oh, Wow! Doug, that technique was never taught at this outpost. But
> studying, with crossed eyes, the arc reaching the tip of one's nose was
> instructional.
>
> Jerry Writer told me that you could count the number of "real" radar
> techs on the West Coast on the fingers of one hand. Jim Manwaring was one
of
> them, were you one of the others?
>
> Old Chief Lynn
>
>
> Nope, not me. I did a small amount of radar and HF AM work in the late
50s, early 60s on the Oregon coast, and then spent 20 years in the US Navy,
retiring as a CTMCS. Did some part time marine work when I was stationed in
the Aleutians in 70-72 and in Maine 76-84. I have only been into it full
time for about 4 years now, after high tech manufacturing crashed in this
area.
Had an installer come begging for a digital VOM the other day as his went
"over the side". I handed him a Simpson 260. He looked puzzled and asked
what that antique does. He was Air Force trained, so guess that explains it.
He declined my offer as it was "too complex".

73
Doug K7ABX
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Lynn Coffelt

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Since: Jul 21, 2005
Posts: 125



(Msg. 11) Posted: Mon Jul 25, 2005 4:16 pm
Post subject: Re: Koden MD-3600 Radar ("too complex") [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

> > Oh, Wow! Doug, that technique was never taught at this outpost. But
> > studying, with crossed eyes, the arc reaching the tip of one's nose was
> > instructional.
> > Nope, not me. I did a small amount of radar and HF AM work in the late
> 50s, early 60s on the Oregon coast, and then spent 20 years in the US
Navy,
> retiring as a CTMCS. Did some part time marine work when I was stationed
in
> the Aleutians in 70-72 and in Maine 76-84. I have only been into it full
> time for about 4 years now, after high tech manufacturing crashed in this
> area.
> Had an installer come begging for a digital VOM the other day as his went
> "over the side". I handed him a Simpson 260. He looked puzzled and asked
> what that antique does. He was Air Force trained, so guess that explains
it.
> He declined my offer as it was "too complex".
>
Our main troubleshooting instrument when I was a young mechanic in the Air
Force was the PSM-6. (early '50s to late '70s). In a second life, after Air
Force, Jerry Hamilton, my marine electronics mentor at Whatcom Marine
Electronics in Anacortes wouldn't allow a digital VOM in the shop. He fired
one tech who was addicted to digital and wouldn't do field work without a
scope. (we only had one scope, and it was sorely needed at the swamped
repair bench)
Old Chief Lynn, W7LTQ (ex-Aircraft Maintenance Superintendent)
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Bruce in Alaska

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Since: Jun 24, 2004
Posts: 213



(Msg. 12) Posted: Mon Jul 25, 2005 6:39 pm
Post subject: Re: Koden MD-3600 Radar ("too complex") [Login to view extended thread Info.]
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In article <dc34kq$9pt$1@domitilla.aioe.org>,
"Lynn Coffelt" <coffelt2.TakeThisOut@comcast.net> wrote:

> Our main troubleshooting instrument when I was a young mechanic in the Air
> Force was the PSM-6. (early '50s to late '70s). In a second life, after Air
> Force, Jerry Hamilton, my marine electronics mentor at Whatcom Marine
> Electronics in Anacortes wouldn't allow a digital VOM in the shop. He fired
> one tech who was addicted to digital and wouldn't do field work without a
> scope. (we only had one scope, and it was sorely needed at the swamped
> repair bench)
> Old Chief Lynn, W7LTQ (ex-Aircraft Maintenance Superintendent)

Now there is a name I haven't heard in a few years, (Decades)....
How is old Jerry (Hamilton) do'in these days? I haven't heard
of Whatcom Marine Electronics for a while either, and figured Billy
"Radar" Pulse had stolen all their business, and they had folded.
If you see Jerry these days, tell him "Hello" from Bruce Gordon...


Bruce in alaska
--
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Lynn Coffelt

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Since: Jul 21, 2005
Posts: 125



(Msg. 13) Posted: Mon Jul 25, 2005 10:54 pm
Post subject: Re: Koden MD-3600 Radar ("too complex") [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

> Now there is a name I haven't heard in a few years, (Decades)....
> How is old Jerry (Hamilton) do'in these days? I haven't heard
> of Whatcom Marine Electronics for a while either, and figured Billy
> "Radar" Pulse had stolen all their business, and they had folded.
> If you see Jerry these days, tell him "Hello" from Bruce Gordon...
>
>
> Bruce in alaska
Jerry Hamilton left me running the Anacortes shop for Whatcom Marine
Electronics in mid 1978, and went to Ketchekan to try to start a Whatcom
shop there. I haven't had much personal contact with him since. He was a
straight arrow guy with lots of pressures. I, too would like to hear from
him. He helped me a lot, and I never had a chance to thank him.
Whatcom Marine Electronics made a big expansion into Nordic Marine
Electronics with shops and seasonal service reps in several locations. When
the king crab boom started to flounder and Bristol Bay took a dive, I got
some help from several people to separate from them and become Anacortes
Marine Electronics. Which is still plugging away without me.
Jerry Writer, one of the two original owners of Whatcom Marine Electronics,
owns and operates San Juan Electronics. Doing quite well, and surviving a
stone's throw from Bill Pulse's empire in Bellingham.
Me, a "Johnny Come Lately" turned "Has-been".
Lynn, W7LTQ, Once Radiotelephone First! (now general......grrrr)
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Bruce in Alaska

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Since: Jun 24, 2004
Posts: 213



(Msg. 14) Posted: Tue Jul 26, 2005 11:30 pm
Post subject: Re: Koden MD-3600 Radar ("too complex") [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

In article <dc4j66$m77$1@domitilla.aioe.org>,
"Lynn Coffelt" <coffelt2 DeleteThis @comcast.net> wrote:

> > Now there is a name I haven't heard in a few years, (Decades)....
> > How is old Jerry (Hamilton) do'in these days? I haven't heard
> > of Whatcom Marine Electronics for a while either, and figured Billy
> > "Radar" Pulse had stolen all their business, and they had folded.
> > If you see Jerry these days, tell him "Hello" from Bruce Gordon...
> >
> >
> > Bruce in alaska
> Jerry Hamilton left me running the Anacortes shop for Whatcom Marine
> Electronics in mid 1978, and went to Ketchekan to try to start a Whatcom
> shop there. I haven't had much personal contact with him since. He was a
> straight arrow guy with lots of pressures. I, too would like to hear from
> him. He helped me a lot, and I never had a chance to thank him.
> Whatcom Marine Electronics made a big expansion into Nordic Marine
> Electronics with shops and seasonal service reps in several locations. When
> the king crab boom started to flounder and Bristol Bay took a dive, I got
> some help from several people to separate from them and become Anacortes
> Marine Electronics. Which is still plugging away without me.
> Jerry Writer, one of the two original owners of Whatcom Marine Electronics,
> owns and operates San Juan Electronics. Doing quite well, and surviving a
> stone's throw from Bill Pulse's empire in Bellingham.
> Me, a "Johnny Come Lately" turned "Has-been".
> Lynn, W7LTQ, Once Radiotelephone First! (now general......grrrr)
>
>

Oh, don't give "Me" a hard time, He has been around the industry
longer than I have. I used to work with him over at Northern
Radio back in the early 70's. He was an excellent tech and
Poineered, a lot of the Point to Point VHF Paths that are still
in use up in Bristol Bay, between the villages, and Naknek/King Salmon.


Bruce in alaska one of the few with an Aircraft Endosement on
his ticket.......
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Lynn Coffelt

External


Since: Jul 21, 2005
Posts: 125



(Msg. 15) Posted: Tue Jul 26, 2005 11:30 pm
Post subject: Re: Koden MD-3600 Radar ("too complex") [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

> Bruce in alaska one of the few with an Aircraft Endosement on
> his ticket.......

I always coveted an Aircraft Endorsement, but after I got the Radar
Endorsement, work and feeding four hungry mouths sort of saturated all the
time that existed.
Northern was always King, I guess, I admired the company, and even did
a couple of quick contract jobs for them.
When I needed another load of Morad antennas, I was too cheap to have
them delivered, so Morad would put them under Northern's dumpsters at close
of day, and I'd drive down after work and pick them up. What impressed me
more than anything was that they had "business" hours. A concept completely
foreign to Anacortes.
Lynn, W7LTQ
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