I have an IC-706 mounted on my Honda Gold Wing motorcycle. The
motorcycle has a dealer-installed CB radio with the CB antenna mounted
in back on the left side of the trunk. I have a 7-foot loaded
vertical for 40 meters mounted to the rear crash bar, only about a
foot to a foot and a half from the CB antenna.

My question is, if I transmit on 40 meters SSB at full power
(nominally 100 watts, actually more like about 70 watts or so), am I
likely to damage the front end of the CB radio? Will it matter if the
CB radio is turned on or off?

I could crank the power on the IC-706 back to as little as 10 watts
but it's going to be hard enough to raise any QSOs with the full 100
watts of power.

On the other hand, the motorcycle CB is big bucks to replace and I'd
be just as happy not to damage it...

Thanks...

C. J. Clegg wrote:
I have an IC-706 mounted on my Honda Gold Wing motorcycle. The
motorcycle has a dealer-installed CB radio with the CB antenna mounted
in back on the left side of the trunk. I have a 7-foot loaded
vertical for 40 meters mounted to the rear crash bar, only about a
foot to a foot and a half from the CB antenna.

My question is, if I transmit on 40 meters SSB at full power
(nominally 100 watts, actually more like about 70 watts or so), am I
likely to damage the front end of the CB radio? Will it matter if the
CB radio is turned on or off?

I could crank the power on the IC-706 back to as little as 10 watts
but it's going to be hard enough to raise any QSOs with the full 100
watts of power.

On the other hand, the motorcycle CB is big bucks to replace and I'd
be just as happy not to damage it...

Thanks...

Hi C.J. With the antennas that close, you could cause damage to the
cb rig. You should have the cb turned off when transmitting with the
ham rig, you will overload the front end and get garbage out of the
speaker.
Some cb rigs ground the antenna with the rig off, and if yours does
then you are OK as long as the cb is off. If your rig does not do this
then you need to add a switch or relay to ground the antenna when the
cb is off, or you are transmitting with the ham rig. As you stated,
you will need all the power you can get to have QSOs, but at what point
does this damage the cb, too many variables?
Gary N4AST

On 31 May 2005 16:30:24 -0700, wrote:


Hi C.J. With the antennas that close, you could cause damage to the
cb rig. You should have the cb turned off when transmitting with the
ham rig, you will overload the front end and get garbage out of the
speaker.
Some cb rigs ground the antenna with the rig off, and if yours does
then you are OK as long as the cb is off. If your rig does not do this
then you need to add a switch or relay to ground the antenna when the
cb is off, or you are transmitting with the ham rig. As you stated,
you will need all the power you can get to have QSOs, but at what point
does this damage the cb, too many variables?
Gary N4AST

I'd also add, a 5 watt cb rig, at that close range, could damage the
706. I'd just shut each rig off while the other is transmitting.

By the way, curious, but what does Honda charge for a factory
installed cb setup?

bob
k5qwg

On Wed, 01 Jun 2005 00:47:19 GMT, Bob Miller
wrote:

By the way, curious, but what does Honda charge for a factory
installed cb setup?

I don't really remember. We had the CB installed when we got the
bike, back in 1991. It was a few hundred bucks at least, as I recall.

open the tx on the ic 706 have a all in one radio problem solve

On Wed, 1 Jun 2005 00:00:58 -0500, wrote:

open the tx on the ic 706 have a all in one radio problem solve


Sure, and risk a $10,000 fine and loss of license to protect a $150
CB.


--
73 for now
Buck
N4PGW

lol

"Buck" wrote in message
...
On Wed, 1 Jun 2005 00:00:58 -0500, wrote:
open the tx on the ic 706 have a all in one radio problem solve
Sure, and risk a $10,000 fine and loss of license to protect a $150
CB.

He'd be breaking the letter of the law but -- assuming he dialed the 706 back
to 5W -- not really the intent, IMO. I really can't imagine the FCC pursuing
the issue. True story: I used to live next door to a guy with a linear amp on
his CB, I called up the FCC field office, and they told me there wasn't
anything they could do. Said they had official monitoring stations that, if
they picked up the guy's transmission, they could go after him, but they just
didn't have the resources to pursue complaints from people calling in
violators. And, oh, did I want their free brochure on mitigating interference
to my own electronics?

:-(

I bet a Goldwing CB is also closer to $1k than $150!

---Joel Kolstad

In article ,
Joel Kolstad wrote:

He'd be breaking the letter of the law but -- assuming he dialed the 706 back
to 5W -- not really the intent, IMO.

Depends on how you read the FCC's intent. If the intent is to limit
power output on the band, yes. If the intent is to require that all
CB transmitters be specifically certificated for this band, no.

The FCC's letters and findings (e.g. when they bust a dealer for
selling "10-meter amateur radio" systems easily converted to 11-meter
operation) seem to me to be asserting the latter pretty consistently.

I really can't imagine the FCC pursuing
the issue. True story: I used to live next door to a guy with a linear amp on
his CB, I called up the FCC field office, and they told me there wasn't
anything they could do. Said they had official monitoring stations that, if
they picked up the guy's transmission, they could go after him, but they just
didn't have the resources to pursue complaints from people calling in
violators.

They do seem to be fairly limited in their ability (or motivation) to
pursue such violations. There are quite a few places on the Net which
advertise "10-meter" radios and also offer "11-meter conversion"
services for 'em. I think I can count, on the fingers of one hand,
the number of dealerships which have been cited for such things in the
past couple of years, and I'd probably have one or two fingers left
over.

And, oh, did I want their free brochure on mitigating interference
to my own electronics?

I seem to recall that somebody (FCC, Congress, ??) pushed through a
change to the laws/regulations, and explicitly gave local
law-enforcement organizations the legal power to prosecute cases of
interference caused by illegally-amplified CB transmitters. Most
police departments are likely either to not know this or not be
terribly interested in pursuing such cases, but in case of severe
unrelenting interference from a known point of origin it might be
worth trying to get them to act on it (on "creating a public nuisance"
or similar grounds).

As to the OP's query - in his situation I'd be tempted to try to wire
up a set of RF and DC relays, which would prevent both rigs from being
powered up at the same time, and would short the antenna connection on
the unpowered rig.

--
Dave Platt AE6EO
Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!

On Wed, 1 Jun 2005 14:33:26 -0700, "Joel Kolstad"
wrote:



He'd be breaking the letter of the law but -- assuming he dialed the 706 back
to 5W -- not really the intent, IMO. I really can't imagine the FCC pursuing
the issue. True story: I used to live next door to a guy with a linear amp on
his CB, I called up the FCC field office, and they told me there wasn't
anything they could do. Said they had official monitoring stations that, if
they picked up the guy's transmission, they could go after him, but they just
didn't have the resources to pursue complaints from people calling in
violators. And, oh, did I want their free brochure on mitigating interference
to my own electronics?

:-(

I bet a Goldwing CB is also closer to $1k than $150!

---Joel Kolstad


YOu have me on the Goldwing CB price, I wouldn't have a clue about it,
but as for the law, I don't recall where it is, but there are FCC
enforcement records that you can read on the internet at their site,
or someone has them posted. I used to read them regularly. They are
filled with enforcement letters to CBers who are using modified rigs
that are non-type accepted or non-certified. They are often fined
$8000 or more and, if a ham, they are ordered to get rid of the rig,
modify it so it can't operate out of band and then cover it in some
form of epoxy so it can't be re-modified again. Loss of license is a
risk.

It may be that only one in a million gets the FCC ticket, but then the
lotto has much lower odds (1:10s of millions) yet someone hits the
jackpot almost every day. The FCC is getting enough complaints to
start going after truck-drivers so all it takes is for that motorcycle
to be in the enforcement area when the FCC is monitoring.

Each radio has it's own finger-print that the FCC can read. Many
times, they can tell the make and model by the signature before ever
seeing the rig. I would think that the most popular HF mobile rig
ever is recognized by the FCC.

As for the local enforcement officers having permission to enforce the
illegal CBs, I believe I remember that that bill was overturned. I
hope so and am glad if it was. I don't know many police that know the
difference between the CB and Ham radio. My goodness, they can't even
tell the difference between a ham rig and a cell phone even when you
hand them a copy of the law that tells them to leave radio operators
alone.



--
73 for now
Buck
N4PGW