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#1
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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 |
#2
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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 |
#3
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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 |
#4
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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 |
#5
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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 |
#6
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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 |
#7
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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 |
#8
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"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. |
#9
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"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. |
#10
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"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. |
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