These are "active" antenna's. Power is provided via the coax and there is
a PCB in there with a pre-amplifier circuit. Some units have notch filters
and/or bandpass filters in them.

Eric

wrote in message
oups.com...
What is in these "couplers" is it just a huge inductor to cancel out
the capacitive reactance?

I discovered this phenomenon the hard way when I replaced the shielded
cable on my car antenna with just some simple coax. Absolutely no AM
signal at the end. Then I figured out why the real cable is a coax
with a very tiny center conductor inside a hollow tube to minimize the
capacitance. If you used something similar to connect any antenna to
your loran it would probably work better.

Have fun.

"Eric Fairbank" wrote in
:

These are "active" antenna's. Power is provided via the coax and
there is
a PCB in there with a pre-amplifier circuit. Some units have notch
filters and/or bandpass filters in them.

Eric



Don't confuse them. They think you can plug just any old thing into any
old thing just because it has the same BNC connector and it will be on the
cheap.

If we go telling them different, technicians' families will starve and have
a bad Christmas...

Not long ago I found a formerly-good GPS front end plugged into a formerly-
good LORAN receiver, myself...

They're pretty close, right?....(c;

On Fri, 23 Dec 2005 09:15:42 -0500, "Eric Fairbank"
wrote:

These are "active" antenna's. Power is provided via the coax and there is
a PCB in there with a pre-amplifier circuit. Some units have notch filters
and/or bandpass filters in them.

=====================================

Absolutely right. If anyone really wants to hack around with this
stuff I have a couple of Northstar LORAN-C units sitting around
without antennas or couplers. They were first class units in their
day and have SO-239 coax connectors on the back.

Wayne.B wrote in
news
Absolutely right. If anyone really wants to hack around with this
stuff I have a couple of Northstar LORAN-C units sitting around
without antennas or couplers. They were first class units in their
day and have SO-239 coax connectors on the back.



I have someone Christmas gift, too. I have a perfectly good-working
Stephens Engineering SEA-106 HF synthesized SSB Marine transceiver with
microphone and NO CABLES OR COUPLER in first class condition I'll give to
the first person who shows up to pick it up. If you have a SEA-106, or
know someone who has one, this one hasn't a scratch. It was at the main
helm of a motoryacht, inside in the air conditioning, all those years.
It's owner said it had been removed when they restored the helm's
woodwork and made a new panel for new gear. Someone threw out all the
cables and coupler which was dumped in another box away from the
transceiver. Sorry.... He said it was working when uninstalled, but he
wanted a marine radio that would work with his new ham license more
easily.

The power plug is marked with + and - and "ON" terminals, which I assume
is a remote power switch to just jumper out. I have no book, no cables,
as it was handed to me after installing a new Icom M802 on the boat. I
never turn down free stuff, even if I have no clue....

Of course, it comes with a full money-back guarantee....(c;

Munge up your email address and post it in reply if you want it....PICKUP
ONLY in Charleston, SC.

On Fri, 23 Dec 2005 19:50:37 -0500, Larry wrote:

I have someone Christmas gift, too. I have a perfectly good-working
Stephens Engineering SEA-106 HF synthesized SSB Marine transceiver

===========================

I will see that and raise you a Stephens SEA112 with coupler. With
the right incentives I might also throw in a Wood Freeman auto pilot
assembly (chain drive). It is a mechanical marvel and only weighs 50
pounds or so.

Wayne.B wrote in
:

I will see that and raise you a Stephens SEA112 with coupler. With
the right incentives I might also throw in a Wood Freeman auto pilot
assembly (chain drive). It is a mechanical marvel and only weighs 50
pounds or so.




You know if we keep this up we'll end up with S/V "Newsgroup", a nice old
Morgan OI 41 loaded with antique electronic gear, for next Christmas...(c;

In article ,
Larry wrote:

Wayne.B wrote in
:

I will see that and raise you a Stephens SEA112 with coupler. With
the right incentives I might also throw in a Wood Freeman auto pilot
assembly (chain drive). It is a mechanical marvel and only weighs 50
pounds or so.




You know if we keep this up we'll end up with S/V "Newsgroup", a nice old
Morgan OI 41 loaded with antique electronic gear, for next Christmas...(c;


Maybe we could have a NewsGroup Auction...with the proceeds going to
some Marine Electronics Foundation for Educating of Mariners.....

I got a whole warehouse (Dry Storage) full of Boat Anchor Marine
Electronics.....

Bruce in alaska
--
add a 2 before @

Bruce in Alaska wrote in news:bruceg-
:

I got a whole warehouse (Dry Storage) full of Boat Anchor Marine
Electronics.....


One of my ham friends, the finest guy you'd ever encounter, has a little
"collector fetish", too. He collects military stuff he finds interesting.
I haven't been in his living room in 15 years, since the little path
between the piles filled in. It's right up to the living room ceiling,
just like the SeaLand containers and huge storage barn in his back yard....

When I need hard-to-find parts to fix old organs, especially ICs, I know
who to ask before internet....(c;

Wayne.B wrote in
:

I will see that and raise you a Stephens SEA112 with coupler. With
the right incentives I might also throw in a Wood Freeman auto pilot
assembly (chain drive). It is a mechanical marvel and only weighs 50
pounds or so.



God, if the Ebay hawkers see this giveaway going on they're gonna have a
HEART ATTACK for Christmas!....(c;

In article ,
Wayne.B wrote:

On Fri, 23 Dec 2005 19:50:37 -0500, Larry wrote:

I have someone Christmas gift, too. I have a perfectly good-working
Stephens Engineering SEA-106 HF synthesized SSB Marine transceiver

===========================

I will see that and raise you a Stephens SEA112 with coupler. With
the right incentives I might also throw in a Wood Freeman auto pilot
assembly (chain drive). It is a mechanical marvel and only weighs 50
pounds or so.


is the drivemotor 12Vdc or 32Vdc?


Bruce in alaska
--
add a 2 before @