Icom IC-745 question (how does CW mode work?)
 

I've recently acquired an Icom IC-745 and I'm unclear on how it's supposed
to work in CW mode. It does receive in SSB and AM, so in general the
receiver appears to work. When I press the 'mode' button to get it to CW
mode, however, it's just... silent. Actually, if I turn up the audio gain,
there is some slight noise in the background. If I turn the squelch (close
to) all the way up, the green 'receive' LED will go out and there's no
detectable noise coming from the speaker.

Any idea what I might be doing wrong here? I was expected that there'd
still be some hissing (background noise) coming from the radio even in CW
mode?

Thanks,
---Joel Kolstad

It could be the filters. Unless an FL-52 or FL-53 455 khz filter is
installed, the radio doesn't work when switched to narrow. Take a
look at page 7-1 in the manual. It shows the various combinations of
filters, and which works when.

Dick - W6CCD

On Mon, 22 Nov 2004 12:13:38 -0800, "Joel Kolstad"
wrote:

I've recently acquired an Icom IC-745 and I'm unclear on how it's supposed
to work in CW mode. It does receive in SSB and AM, so in general the
receiver appears to work. When I press the 'mode' button to get it to CW
mode, however, it's just... silent. Actually, if I turn up the audio gain,
there is some slight noise in the background. If I turn the squelch (close
to) all the way up, the green 'receive' LED will go out and there's no
detectable noise coming from the speaker.

Any idea what I might be doing wrong here? I was expected that there'd
still be some hissing (background noise) coming from the radio even in CW
mode?

Thanks,
---Joel Kolstad

It could be the filters. Unless an FL-52 or FL-53 455 khz filter is
installed, the radio doesn't work when switched to narrow. Take a
look at page 7-1 in the manual. It shows the various combinations of
filters, and which works when.

Dick - W6CCD

On Mon, 22 Nov 2004 12:13:38 -0800, "Joel Kolstad"
wrote:

I've recently acquired an Icom IC-745 and I'm unclear on how it's supposed
to work in CW mode. It does receive in SSB and AM, so in general the
receiver appears to work. When I press the 'mode' button to get it to CW
mode, however, it's just... silent. Actually, if I turn up the audio gain,
there is some slight noise in the background. If I turn the squelch (close
to) all the way up, the green 'receive' LED will go out and there's no
detectable noise coming from the speaker.

Any idea what I might be doing wrong here? I was expected that there'd
still be some hissing (background noise) coming from the radio even in CW
mode?

Thanks,
---Joel Kolstad

It could be the filters. Unless an FL-52 or FL-53 455 khz filter is
installed, the radio doesn't work when switched to narrow. Take a
look at page 7-1 in the manual. It shows the various combinations of
filters, and which works when.

Dick - W6CCD

On Mon, 22 Nov 2004 12:13:38 -0800, "Joel Kolstad"
wrote:

I've recently acquired an Icom IC-745 and I'm unclear on how it's supposed
to work in CW mode. It does receive in SSB and AM, so in general the
receiver appears to work. When I press the 'mode' button to get it to CW
mode, however, it's just... silent. Actually, if I turn up the audio gain,
there is some slight noise in the background. If I turn the squelch (close
to) all the way up, the green 'receive' LED will go out and there's no
detectable noise coming from the speaker.

Any idea what I might be doing wrong here? I was expected that there'd
still be some hissing (background noise) coming from the radio even in CW
mode?

Thanks,
---Joel Kolstad

I agree the ex-owner probably ripped out the filter.
Frank KG9H
"Dick" LeadWinger wrote in message
...
It could be the filters. Unless an FL-52 or FL-53 455 khz filter is
installed, the radio doesn't work when switched to narrow. Take a
look at page 7-1 in the manual. It shows the various combinations of
filters, and which works when.

Dick - W6CCD

On Mon, 22 Nov 2004 12:13:38 -0800, "Joel Kolstad"
wrote:

I've recently acquired an Icom IC-745 and I'm unclear on how it's
supposed
to work in CW mode. It does receive in SSB and AM, so in general the
receiver appears to work. When I press the 'mode' button to get it to CW
mode, however, it's just... silent. Actually, if I turn up the audio
gain,
there is some slight noise in the background. If I turn the squelch
(close
to) all the way up, the green 'receive' LED will go out and there's no
detectable noise coming from the speaker.

Any idea what I might be doing wrong here? I was expected that there'd
still be some hissing (background noise) coming from the radio even in CW
mode?

Thanks,
---Joel Kolstad

I agree the ex-owner probably ripped out the filter.
Frank KG9H
"Dick" LeadWinger wrote in message
...
It could be the filters. Unless an FL-52 or FL-53 455 khz filter is
installed, the radio doesn't work when switched to narrow. Take a
look at page 7-1 in the manual. It shows the various combinations of
filters, and which works when.

Dick - W6CCD

On Mon, 22 Nov 2004 12:13:38 -0800, "Joel Kolstad"
wrote:

I've recently acquired an Icom IC-745 and I'm unclear on how it's
supposed
to work in CW mode. It does receive in SSB and AM, so in general the
receiver appears to work. When I press the 'mode' button to get it to CW
mode, however, it's just... silent. Actually, if I turn up the audio
gain,
there is some slight noise in the background. If I turn the squelch
(close
to) all the way up, the green 'receive' LED will go out and there's no
detectable noise coming from the speaker.

Any idea what I might be doing wrong here? I was expected that there'd
still be some hissing (background noise) coming from the radio even in CW
mode?

Thanks,
---Joel Kolstad

I agree the ex-owner probably ripped out the filter.
Frank KG9H
"Dick" LeadWinger wrote in message
...
It could be the filters. Unless an FL-52 or FL-53 455 khz filter is
installed, the radio doesn't work when switched to narrow. Take a
look at page 7-1 in the manual. It shows the various combinations of
filters, and which works when.

Dick - W6CCD

On Mon, 22 Nov 2004 12:13:38 -0800, "Joel Kolstad"
wrote:

I've recently acquired an Icom IC-745 and I'm unclear on how it's
supposed
to work in CW mode. It does receive in SSB and AM, so in general the
receiver appears to work. When I press the 'mode' button to get it to CW
mode, however, it's just... silent. Actually, if I turn up the audio
gain,
there is some slight noise in the background. If I turn the squelch
(close
to) all the way up, the green 'receive' LED will go out and there's no
detectable noise coming from the speaker.

Any idea what I might be doing wrong here? I was expected that there'd
still be some hissing (background noise) coming from the radio even in CW
mode?

Thanks,
---Joel Kolstad

"Frank Krozel" wrote:

I agree the ex-owner probably ripped out the filter.
Frank KG9H
"Dick" LeadWinger wrote in message
.. .
It could be the filters. Unless an FL-52 or FL-53 455 khz filter is
installed, the radio doesn't work when switched to narrow. Take a
look at page 7-1 in the manual. It shows the various combinations of
filters, and which works when.

Dick - W6CCD

On Mon, 22 Nov 2004 12:13:38 -0800, "Joel Kolstad"
wrote:

I've recently acquired an Icom IC-745 and I'm unclear on how it's
supposed
to work in CW mode. It does receive in SSB and AM, so in general the
receiver appears to work. When I press the 'mode' button to get it to CW
mode, however, it's just... silent. Actually, if I turn up the audio
gain,
there is some slight noise in the background. If I turn the squelch
(close
to) all the way up, the green 'receive' LED will go out and there's no
detectable noise coming from the speaker.

Any idea what I might be doing wrong here? I was expected that there'd
still be some hissing (background noise) coming from the radio even in CW
mode?

Thanks,
---Joel Kolstad

I agree also. You're probably missing the CW filter. However check your manual.
Every rig I've had with an optional CW filter had a way to route the CW mode
through the SSB filter if that filter was not installed, either by the menu or a
jumper.

"Frank Krozel" wrote:

I agree the ex-owner probably ripped out the filter.
Frank KG9H
"Dick" LeadWinger wrote in message
.. .
It could be the filters. Unless an FL-52 or FL-53 455 khz filter is
installed, the radio doesn't work when switched to narrow. Take a
look at page 7-1 in the manual. It shows the various combinations of
filters, and which works when.

Dick - W6CCD

On Mon, 22 Nov 2004 12:13:38 -0800, "Joel Kolstad"
wrote:

I've recently acquired an Icom IC-745 and I'm unclear on how it's
supposed
to work in CW mode. It does receive in SSB and AM, so in general the
receiver appears to work. When I press the 'mode' button to get it to CW
mode, however, it's just... silent. Actually, if I turn up the audio
gain,
there is some slight noise in the background. If I turn the squelch
(close
to) all the way up, the green 'receive' LED will go out and there's no
detectable noise coming from the speaker.

Any idea what I might be doing wrong here? I was expected that there'd
still be some hissing (background noise) coming from the radio even in CW
mode?

Thanks,
---Joel Kolstad

I agree also. You're probably missing the CW filter. However check your manual.
Every rig I've had with an optional CW filter had a way to route the CW mode
through the SSB filter if that filter was not installed, either by the menu or a
jumper.

"Frank Krozel" wrote:

I agree the ex-owner probably ripped out the filter.
Frank KG9H
"Dick" LeadWinger wrote in message
.. .
It could be the filters. Unless an FL-52 or FL-53 455 khz filter is
installed, the radio doesn't work when switched to narrow. Take a
look at page 7-1 in the manual. It shows the various combinations of
filters, and which works when.

Dick - W6CCD

On Mon, 22 Nov 2004 12:13:38 -0800, "Joel Kolstad"
wrote:

I've recently acquired an Icom IC-745 and I'm unclear on how it's
supposed
to work in CW mode. It does receive in SSB and AM, so in general the
receiver appears to work. When I press the 'mode' button to get it to CW
mode, however, it's just... silent. Actually, if I turn up the audio
gain,
there is some slight noise in the background. If I turn the squelch
(close
to) all the way up, the green 'receive' LED will go out and there's no
detectable noise coming from the speaker.

Any idea what I might be doing wrong here? I was expected that there'd
still be some hissing (background noise) coming from the radio even in CW
mode?

Thanks,
---Joel Kolstad

I agree also. You're probably missing the CW filter. However check your manual.
Every rig I've had with an optional CW filter had a way to route the CW mode
through the SSB filter if that filter was not installed, either by the menu or a
jumper.