Are you saying that the osc's in marine ht/ssb's are more stable that the
osc's in ham hf/ssb's ? Why should that be so ? If icom can make it stable
in the marine ssb; why don't they deploy the same technology in the ham
ssb's ? I guess freq stability is a must for hams as well ??

When the 802 is enabled for ham (using the procedure you describe) will it
do both or do you have to toggle it back constantly ?

You often hear that marine ssb's are difficult to use on ham, as they are
optimised for a fixed freq setting, and not for the more variable freq used
on ham. How big a problem i that ?

Idont know you ham license structure, but where I live only the higest
license level are allowed to use more than 100w. Can the 802 be configured
to run only 100w on ham bands and 150w on marine bands ?

Bjarke


"Larry" wrote in message
...
"Steve" wrote in
oups.com:

and marine bands (after appropriate doctoring)

If they catch you using ham gear on the marine bands, they'll take your
ham license and ship license and fine you bigtime. It is something to
consider. Unless your 706 or Yahoo has the high stability master
oscillator, it isn't stable enough for marine band use, which is why it's
not approved.

I prefer Yahoo over Icom on the ham bands. But, the Icom M802 is a great
radio for both bands. To put the M802 to full-band transmit, all freqs,
turn it off. Hold down MODE + TX + 2 while turning it on. It now
transmits from 2-30 Mhz. To put it back to just marine use, simply
repeat the procedure. Be careful not to press any other buttons doing
this as many other combinations exist that are undocumented to the users,
that may lock it for an expensive factory reset. I use Lionheart's M802
to an AT-130 loading a 55' backstay and triattic capacitor hat. Works
great on all the bands, considering most of the power it generates is
simply absorbed by the sailing rigging.

Now, which marine rig converted to the ham bands were you buying?

My ham stations are a fully loaded FT-990AC to a Drake L4B with proper
stable HVDC power supply to a Butternut HF9VX vertical mounted in the
center of a metal roof ground plane. Mobile is a fully loaded FT-900 and
highly modified Tentec Hercules II 12V linear feeding a 15' tall homebrew
Texas Bug catcher of my own design at 650W RF output from a '73 Mercedes
220 Diesel with no electronic noise makers, whatsoever, on 160-10M.

I hardly ever use it any more. Skype on the internet is more fun without
those old codgers bitching at you you're on their private frequency
they've been using since 1948....(c;

Larry W4Charleston South Carolina
on Lionheart WDB-6254
an old codger ham since 1957...I was 11.

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"Bjarke M. Christensen" bjarkeNG@grevestrand_punktum_danmark wrote in
:

Are you saying that the osc's in marine ht/ssb's are more stable that
the osc's in ham hf/ssb's ? Why should that be so ? If icom can make
it stable in the marine ssb; why don't they deploy the same technology
in the ham ssb's ? I guess freq stability is a must for hams as well
??

Yes, of course. Ham radio has only one channelized band, 60 meters a new
one, shared with government stations under a test for emergency comms in
places like Katrina. All the other ham bands are broad strokes of
frequencies you can operate anyplace in there you like. The radios have
10 or 100 Hz steps. Their master oscillators are cheaply made, not
temperature compensated much as there is no need. Most have a trimmer on
the outside of the radio so you can tweak it closer, yourself. Marine
radios have temperature-compensated crystal master oscillators accurate
to a standard. The M802 is:

Operating temp. range :
–30°C to +60°C; –22°F to +140°F
Guaranteed range : –20°C to +55°C; –4°F to +131°F
Frequency stability : ±10Hz (at –20°C to +55°C)

This exceeds the .005% of the FCC standard for type acceptance. Hell, 10
Hz is closer than the 20 Hz of an AM broadcast transmitter costing
thousands of times more. (Most AM transmitters, today, are within 1 Hz.
You rarely hear much of a beat note at night on frequencies you can hear
two or more stations transmitting on.)

M802 also exceeds other standards for unwanted emissions that cause
interference to other frequencies:

Output power : 150, 60, 20W PEP (Selectable)
Spurious emissions : –62dB
Unwanted sideband : 55dB
Carrier suppression : 40dB

Its design also keeps you on the right sideband, USB, and its computer
will not permit you to do technical things wrong users know nothing about
that any ham radio will easily do if you just bump a knob or press the
wrong button.

All this is designed so that operators with very limited or no knowledge
of radio transmitter operation can operate the marine HF radio without
causing undue interference to other services and users by technical
incompetence. It's why cop, business band, trunk radio and CB radios are
so simple...a minimal number of knobs to screw up. UNfortunately, M802
has way too many buttons and knobs for most of its owners to use. It
requires too much education the older SSB radios didn't need....Channel,
Volume, Squelch, PTT microphone are all they should have. Japanese pride
themselves in making anything they create into a technological wonder.
M802 should make them all very proud.

The other reason they don't make ham radios so stringent is
simple....money. You can see it in the difference in price between an
M802 type-accepted commercial radio and the Icom 706 ham rig. Few hams
will pay for a type-accepted commercial-grade radio. Hams are an awful
"cheap" lot. So, in response to the market...just like consumer
electronics everywhere...Kenmore, Yahoo and Icum make 'em as cheaply as
the market wants...just like that PoS TV in your living room.



When the 802 is enabled for ham (using the procedure you describe)
will it do both or do you have to toggle it back constantly ?

It will do both. But, make SURE you put it back to channelized transmit
before any Ship Inspections or you'll be busted. Pleasure boats are
pretty much immune from ship inspections, but, if you look at your ship
station licence from FCC, you'll notice they can come inspect your
installation at any time for compliance.

If I'm aboard, it's open so I can chat on 20 meters. If I'm not aboard,
being the only licensed ham, I switch it back so my captain doesn't try
to talk to BBC on 31 meters by mistake....one of his channels...(c;


You often hear that marine ssb's are difficult to use on ham, as they
are optimised for a fixed freq setting, and not for the more variable
freq used on ham. How big a problem i that ?

That is true of a lot of them. They are made to be channelized radios.
When Icom made the M802, some ham infiltrated the design team and had
them implement BOTH channelized operation, where the display shows you
what marine channel you are operating on...and...a beautiful frequency
display where the left knob chooses which digit to change with the right
knob, giving you coarse and fine frequency control, AND, made it so the
digit you're changing carries over when it switches anything from 9 to 0.
The right knob acts just like a ham VFO, in 100 Hz steps which is close
enough for hams. There's a little learning curve to switch the dials
between modes but once you learn how and use it it becomes second nature
very quickly. It's not a big problem at all on M802. The older and
cheaper radios don't have this feature making them useless...which is
what caused boaters to illegally use ham radios for marine radios in the
first place....that and PRICE.


Idont know you ham license structure, but where I live only the higest
license level are allowed to use more than 100w. Can the 802 be
configured to run only 100w on ham bands and 150w on marine bands ?

Yes. The M802 has 3 power levels simply adjusted by the front panel
buttons.
From the webpage:
http://www.icomamerica.com/products/...m802/specs.asp
Output power : 150, 60, 20W PEP (Selectable)

Another issue for your country is that I'm talking about USA type
acceptance and the FCC, Federal Communications Commission. Although our
government bureaucrats like to think they are omnipotent, they are not.
Your laws and radio regulations ARE different than our, but probably
accept FCC type acceptance as a matter of convenience. You may have more
lax laws than the USA. Check with your radio bureaucrats for guidance on
Marine installations. America has changed, recently. In the past, you
had to have a 2nd Class FCC commercial radio operator's license to
install and configure a marine radio. Owners were not allowed to do
anything to it but use it. Now, owners are allowed to install it as long
as the installation does not involve any adjustments to the factory-set,
type accepted internal settings. The computer and transistor broadband
amplifiers allowed this to happen as no radios require extensive tuning
like they used to back in the tube days. They're all plug n play.

I'm sure Danmark's radio bureaucrats have webpages about the laws,
regulations and requirements for your country.

Larry.

"Larry" wrote in message
...
Marine radios have temperature-compensated crystal master oscillators
accurate
to a standard.

Marine SSB's use an oven controlled crystal oscillator, not
temperature-compensated ones. Ham rigs that have a high stability oscillator
use the termperature-compenstated crystal oscillators.

When the 802 is enabled for ham (using the procedure you describe)
will it do both or do you have to toggle it back constantly ?

It will do both. But, make SURE you put it back to channelized transmit
before any Ship Inspections or you'll be busted.

There is no need to do this. It is perfectly legal to put the 802 in open
mode and use it on the ham bands. You do not void the warranty, the type
certification, or break any FCC rules by doing this.

You often hear that marine ssb's are difficult to use on ham, as they
are optimised for a fixed freq setting, and not for the more variable
freq used on ham. How big a problem i that ?

It's not a big problem at all on M802. The older and
cheaper radios don't have this feature making them useless...which is
what caused boaters to illegally use ham radios for marine radios in the
first place....that and PRICE.

You can also easily open up the M710 and M700pro SSB's to operate on the
ham bands and use the channel knob as a VFO control. As with the 802, you
can only change frequency in 100hz steps or greater and it operates as a
detented switch as opposed to the smooth rotary encoder of a ham rig.

Eric

In article ,
"Eric Fairbank" wrote:

Marine SSB's use an oven controlled crystal oscillator, not
temperature-compensated ones. Ham rigs that have a high stability oscillator
use the termperature-compenstated crystal oscillators.

May, or may not, be true, depending on the Radio Design. Type Acceptance
does NOT define the design, it only specifies the Stability.....

Bruce in alaska
--
add a 2 before @

Bruce in Alaska wrote in news:bruceg-
:

May, or may not, be true, depending on the Radio Design. Type Acceptance
does NOT define the design, it only specifies the Stability.....



There's no oven in the M802. I have a high stab compensated xtal
oscillator in my Yaesu FT-990AC and FT-900 radios. Sync to WWV on 10 Mhz
drifts less than 2 hz in a year, even on the FT-900 in the car. I don't
think anyone uses xtal ovens any more. Solid state compensation works
wonderfully without loading down battery systems with heaters.

WSB-AM in Atlanta used to be about 2.2Hz low in freq on my FT-990AC....(c;

Sorry, I worked in government calibration labs from 1966 to 1988, even at
sea. Old habits are hard to break. If you see a Navy cal sticker that
says CNSYD Metrology Lab on it. Look for the 08 on the stamp...that was
me...(c;

Larry
--
Vista has been out a week.
Is Service Pack 1 ready yet?

"Larry" wrote in message
...

There's no oven in the M802.

Yes there IS. It uses a CR-604 OCXO. That's Oven Controlled Crystal
Oscillator. It uses a resistive heating element operating directly off the
HV supply.

Eric

In addition to the M802, the following marine SSB's also use an OCXO. Icom
M700, M710, Furuno FS-1503, and the SEA222.

Eric

"Eric Fairbank" wrote in
:

Yes there IS. It uses a CR-604 OCXO. That's Oven Controlled Crystal
Oscillator. It uses a resistive heating element operating directly off
the HV supply.


What "high voltage supply"?? Does yours have tubes in it?? Mine only
draws around 200ma on receive, hardly enough to run its computer and any
kind of heater...

Larry
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Vista has been out a week.
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