"Bruce in Alaska" wrote in message
...
In article ,
"Doug Dotson" wrote:

Not familiar with a Marine Radio Tech License? I have a GROL
with radar Endorsement and a GMDSS/M, but I'm not aware
that is what you are referring to. The NMEA has a certification
process but that's not really a "license" per se.

Doug, k3qt
s/v Callista

Licensed Marine Radio Tech is a person who has an FCC GROL/w
RADAR/GMDSS-M and is licensed to maintain Maritime Mobile Radio Service
licensed systems aboard US flagged Vessels.

Then I guess I R 1. But what is the second part of your statement? The part
that
reads "and is licensed to maintain Maritime Mobile Radio Service
licensed systems aboard US flagged Vessels"? What is this license? Who
issues it?

The SOLAS Requires that
Title III Part II, and title III Part I Vessels be inspected on an annual
basis and that inspection by a Licensed Marine Radio Tech, be logged in
the Vessel Station Log and a renewed SOLAS Certificate be Issued and
Posted for Public Inspection. In the passed, these inspections were
done by FCC Field Agents, and the SOLAS Certificates, Bridge to Bridge
RadioTelephone Certificates, were issued by the FCC Field Agents, on
completion of the inspection. A similar inspection of Title IIi Part
IIi Vessels needs to be completed every 5 years for those class vessels,
and is done, now, through the same method.

I remember all the mumbo-jumbo from the GMDSS license. So is the GMDSS/M
license what makes one all of these fancy titles or is there some other
authority that grants these lofty titles.

Bruce in alaska
--
add a 2 before @

In article ,
"Doug Dotson" wrote:

"Bruce in Alaska" wrote in message
...
In article ,
"Doug Dotson" wrote:

Not familiar with a Marine Radio Tech License? I have a GROL
with radar Endorsement and a GMDSS/M, but I'm not aware
that is what you are referring to. The NMEA has a certification
process but that's not really a "license" per se.

Doug, k3qt
s/v Callista

Licensed Marine Radio Tech is a person who has an FCC GROL/w
RADAR/GMDSS-M and is licensed to maintain Maritime Mobile Radio Service
licensed systems aboard US flagged Vessels.

Then I guess I R 1. But what is the second part of your statement? The part
that
reads "and is licensed to maintain Maritime Mobile Radio Service
licensed systems aboard US flagged Vessels"? What is this license? Who
issues it?

The SOLAS Requires that
Title III Part II, and title III Part I Vessels be inspected on an annual
basis and that inspection by a Licensed Marine Radio Tech, be logged in
the Vessel Station Log and a renewed SOLAS Certificate be Issued and
Posted for Public Inspection. In the passed, these inspections were
done by FCC Field Agents, and the SOLAS Certificates, Bridge to Bridge
RadioTelephone Certificates, were issued by the FCC Field Agents, on
completion of the inspection. A similar inspection of Title IIi Part
IIi Vessels needs to be completed every 5 years for those class vessels,
and is done, now, through the same method.

I remember all the mumbo-jumbo from the GMDSS license. So is the GMDSS/M
license what makes one all of these fancy titles or is there some other
authority that grants these lofty titles.

Bruce in alaska
--
add a 2 before @



Yep, your R one, and with this little slip of paper, you can now LEGALLY
adjust Marine & Aircraft Radio Systems so as to make them compliant with
Parts 80 & 87 of the FCC Rules and Regulations. Oh yea, you need an FAA
Certificate if you mess with Aircraft systems in actual Aircraft, or you
need someone who has an FAA Certificate to sign off on any work on
Aircraft Radio's.

All that said, there really isn't much to adjust anymore unless your
working with some of the older MF/HF Radio's around. Mostly just
setting the Master Osc. on frequency, and then setting the power output,
and your done these days.

Bruce in alaska
--
add a 2 before @

Yes the top hat would help out on 2 and 4 mhz frequencies. Problem is
where to put it where it is not in the way.

A loading coil on the stay would also help out but it would work even
better if it was up high nearer to the top of the stay.
Problem is that usually only one antenna is available for all bands on
a boat. At the higher frequencies that loading coil would act as a
choke and effectively disconnect the upper portion of the antenna.
Which may not be all that bad if there is sufficient length below the
coil for the higher frequencies.

The other problem that you may run into is that the auto tuner may not
like the impedance it sees. Most auto tuners do not like to see a
resonant antenna near 50 ohms. But on 2 mhz it would probably help a
lot.

Regards
Gary


On Thu, 29 Jan 2004 12:20:07 -0500, "Vito" wrote:

Tests of mobile antennae in the Amateur Radio 75 meter band (4MHz) yielded
the following results:

* Well-designed Bugcatcher or Screwdriver with top hat 0 dB reference
* Bugcatcher or Screwdriver with no top hat -3 dB
* Hustler or Outbacker -9 dB
* Hamstick -12 dB
* Whip with autotuner -14 dB

This suggests that the common insulated-backstay-with-autotuner used on
sailboats could be improved by adding a capacitive top hat immediately below
the upper insulator and/or a tapped coil in parallel (ie around) the lower
insulator to tune whatever length of antenna one can physically accomodate
to resonate on or near the Marine frequencies of interest, such as 2182 MHz.
Has anyone any experience doing so?

Ok guys,, what's your comments on the 2m homebrew antenna? Anyone build one
and had a particular preference or reasons why one over the other?

Thanks






"Gary Schafer" wrote in message
news
Yes the top hat would help out on 2 and 4 mhz frequencies. Problem is
where to put it where it is not in the way.

A loading coil on the stay would also help out but it would work even
better if it was up high nearer to the top of the stay.
Problem is that usually only one antenna is available for all bands on
a boat. At the higher frequencies that loading coil would act as a
choke and effectively disconnect the upper portion of the antenna.
Which may not be all that bad if there is sufficient length below the
coil for the higher frequencies.

The other problem that you may run into is that the auto tuner may not
like the impedance it sees. Most auto tuners do not like to see a
resonant antenna near 50 ohms. But on 2 mhz it would probably help a
lot.

Regards
Gary


On Thu, 29 Jan 2004 12:20:07 -0500, "Vito" wrote:

Tests of mobile antennae in the Amateur Radio 75 meter band (4MHz)
yielded
the following results:

* Well-designed Bugcatcher or Screwdriver with top hat 0 dB reference
* Bugcatcher or Screwdriver with no top hat -3 dB
* Hustler or Outbacker -9 dB
* Hamstick -12 dB
* Whip with autotuner -14 dB

This suggests that the common insulated-backstay-with-autotuner used on
sailboats could be improved by adding a capacitive top hat immediately
below
the upper insulator and/or a tapped coil in parallel (ie around) the
lower
insulator to tune whatever length of antenna one can physically
accomodate
to resonate on or near the Marine frequencies of interest, such as 2182
MHz.
Has anyone any experience doing so?

Last one I built was just a rod soldered into a SO-259 chassis mount
connector. Radials were bolted into the 4 mounting holes along with
a mounting bracket. Worked good. Hardly worth doing homebrew
for something so common these days.

Doug, k3qt
s/v Callista

" Tuuk" wrote in message
...
Ok guys,, what's your comments on the 2m homebrew antenna? Anyone build
one
and had a particular preference or reasons why one over the other?

Thanks






"Gary Schafer" wrote in message
news
Yes the top hat would help out on 2 and 4 mhz frequencies. Problem is
where to put it where it is not in the way.

A loading coil on the stay would also help out but it would work even
better if it was up high nearer to the top of the stay.
Problem is that usually only one antenna is available for all bands on
a boat. At the higher frequencies that loading coil would act as a
choke and effectively disconnect the upper portion of the antenna.
Which may not be all that bad if there is sufficient length below the
coil for the higher frequencies.

The other problem that you may run into is that the auto tuner may not
like the impedance it sees. Most auto tuners do not like to see a
resonant antenna near 50 ohms. But on 2 mhz it would probably help a
lot.

Regards
Gary


On Thu, 29 Jan 2004 12:20:07 -0500, "Vito" wrote:

Tests of mobile antennae in the Amateur Radio 75 meter band (4MHz)
yielded
the following results:

* Well-designed Bugcatcher or Screwdriver with top hat 0 dB reference
* Bugcatcher or Screwdriver with no top hat -3 dB
* Hustler or Outbacker -9 dB
* Hamstick -12 dB
* Whip with autotuner -14 dB

This suggests that the common insulated-backstay-with-autotuner used on
sailboats could be improved by adding a capacitive top hat immediately
below
the upper insulator and/or a tapped coil in parallel (ie around) the
lower
insulator to tune whatever length of antenna one can physically
accomodate
to resonate on or near the Marine frequencies of interest, such as 2182
MHz.
Has anyone any experience doing so?