I have a Yeasu ft8100r dual band 2m /440 rig. I am having problems on
the 2 meter side of the rig. When I depress the ptt I rig hangs in
transmit. This does not happen on 440. Does anybody know why this
might be happening.

Thanks

Chip

Ralph Blach wrote:


I have a Yeasu ft8100r dual band 2m /440 rig. I am having problems on
the 2 meter side of the rig. When I depress the ptt I rig hangs in
transmit. This does not happen on 440. Does anybody know why this
might be happening.

Sounds like you might have a little RF getting back into the keying
circuit, possibly as a result of an antenna failure of some type. Can
you duplicate the problem transmitting into a dummy load?

--
To design the perfect anti-Unix, write an operating system that thinks
it knows what you're doing better than you do. And then adds injury to
insult by getting it wrong.
- esr

Ralph Blach wrote:


I have a Yeasu ft8100r dual band 2m /440 rig. I am having problems on
the 2 meter side of the rig. When I depress the ptt I rig hangs in
transmit. This does not happen on 440. Does anybody know why this
might be happening.

Another possibility that just occurred to me is the existence of a "one
touch" PTT arrangement, where the mike needs two discrete presses of the
PTT to switch into transmit then back out. What happens if you release
the PTT then depress and release it again?

--
To design the perfect anti-Unix, write an operating system that thinks
it knows what you're doing better than you do. And then adds injury to
insult by getting it wrong.
- esr

Well it as definately RF getting into the rig. I put the antenna on top
of my car and the rig worked perfectly. Now, Since I plan to use this
rig close to the antenna, how do I keep the rf out the rig?

I guess I will have to put in a steel tool box and keep the head outside
of the rig.

Any other Ideas.

Chip


Ralph Blach wrote:
I have a Yeasu ft8100r dual band 2m /440 rig. I am having problems on
the 2 meter side of the rig. When I depress the ptt I rig hangs in
transmit. This does not happen on 440. Does anybody know why this
might be happening.

Thanks

Chip

Ralph Blach wrote:


Well it as definately RF getting into the rig. I put the antenna on top
of my car and the rig worked perfectly. Now, Since I plan to use this
rig close to the antenna, how do I keep the rf out the rig?

I guess I will have to put in a steel tool box and keep the head outside
of the rig.

Any other Ideas.

How well does it behave at its lowest power setting in your preferred
layout?

Can you reliably hit the repeater at that power?

Have you tried clipping ferrite beads to the power leads, any external
speaker leads, any control head/main body leads, and the mike cable?

--
To design the perfect anti-Unix, write an operating system that thinks
it knows what you're doing better than you do. And then adds injury to
insult by getting it wrong.
- esr

Thats not the problem. Most of the time I operating in
Red Cross Shelters and the Radio and antenna are going to be in close
proximity. Last year, I was at a shelter during a hurricane and the
antenna had to be indoors. In theses situations, I need High power to
get throught the walls of the shelters.

Any Ideas.

Chip



Robert Grizzard wrote:
Ralph Blach wrote:



Well it as definately RF getting into the rig. I put the antenna on top
of my car and the rig worked perfectly. Now, Since I plan to use this
rig close to the antenna, how do I keep the rf out the rig?


I guess I will have to put in a steel tool box and keep the head outside
of the rig.


Any other Ideas.


How well does it behave at its lowest power setting in your preferred
layout?

Can you reliably hit the repeater at that power?

Have you tried clipping ferrite beads to the power leads, any external
speaker leads, any control head/main body leads, and the mike cable?

Ralph Blach wrote:


Thats not the problem. Most of the time I operating in
Red Cross Shelters and the Radio and antenna are going to be in close
proximity. Last year, I was at a shelter during a hurricane and the
antenna had to be indoors. In theses situations, I need High power to
get throught the walls of the shelters.

Any Ideas.

There's more than one way to reduce the level of stray RF inside the
case.

If you're using an omnidirectional vertical, you'll have a null on the
radiating element's axis. If you can elevate the antenna that should
help. If you can achieve some measure of horizontal separation as well,
that will also help. The ferrite beads won't be wasted either, as they
will add a lot of loss to the RF flowing down the power line and the
microphone cable without affecting the DC current or the audio tones.

And if push comes to shove, there's always the steel toolbox to fall
back on.

--
To design the perfect anti-Unix, write an operating system that thinks
it knows what you're doing better than you do. And then adds injury to
insult by getting it wrong.
- esr

Ralph Blach wrote:


Thats not the problem. Most of the time I operating in
Red Cross Shelters and the Radio and antenna are going to be in close
proximity. Last year, I was at a shelter during a hurricane and the
antenna had to be indoors. In theses situations, I need High power to
get throught the walls of the shelters.

Any Ideas.

There's more than one way to reduce the level of stray RF inside the
case.

If you're using an omnidirectional vertical, you'll have a null on the
radiating element's axis. If you can elevate the antenna that should
help. If you can achieve some measure of horizontal separation as well,
that will also help. The ferrite beads won't be wasted either, as they
will add a lot of loss to the RF flowing down the power line and the
microphone cable without affecting the DC current or the audio tones.

And if push comes to shove, there's always the steel toolbox to fall
back on.

--
To design the perfect anti-Unix, write an operating system that thinks
it knows what you're doing better than you do. And then adds injury to
insult by getting it wrong.
- esr

Thats not the problem. Most of the time I operating in
Red Cross Shelters and the Radio and antenna are going to be in close
proximity. Last year, I was at a shelter during a hurricane and the
antenna had to be indoors. In theses situations, I need High power to
get throught the walls of the shelters.

Any Ideas.

Chip



Robert Grizzard wrote:
Ralph Blach wrote:



Well it as definately RF getting into the rig. I put the antenna on top
of my car and the rig worked perfectly. Now, Since I plan to use this
rig close to the antenna, how do I keep the rf out the rig?


I guess I will have to put in a steel tool box and keep the head outside
of the rig.


Any other Ideas.


How well does it behave at its lowest power setting in your preferred
layout?

Can you reliably hit the repeater at that power?

Have you tried clipping ferrite beads to the power leads, any external
speaker leads, any control head/main body leads, and the mike cable?

I don't think you said what kind of antenna you are using. If using a
magnet mount antenna why don't you just extend the coax length by 10 or 15
feet with RG-58X coax and put the antenna on some sort of metal sheet, tin
cookie sheet or a metal filing cabinet or something like that. At that
distance the antenna should be far enough away to stop the problem. Also,
this shelter you spoke of, I can't see the walls being a problem for RF
getting out although high power would is best for longer distance.
Good Luck


Ralph Blach wrote:

Well it as definately RF getting into the rig. I put the antenna on top
of my car and the rig worked perfectly. Now, Since I plan to use this
rig close to the antenna, how do I keep the rf out the rig?

I guess I will have to put in a steel tool box and keep the head outside
of the rig.

Any other Ideas.

Chip

Ralph Blach wrote:
I have a Yeasu ft8100r dual band 2m /440 rig. I am having problems on
the 2 meter side of the rig. When I depress the ptt I rig hangs in
transmit. This does not happen on 440. Does anybody know why this
might be happening.

Thanks

Chip