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| Author |
Message |
ball
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Receivers
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Jun 14 22:26 UTC 2006 |
I received a C. Crane catalogue today. They have the Sangean
ATS-505P, which covers 1.7 to 30 MHz and includes SSB. No
mention is made of CW though. Is that just a question of
adding an external tight, tuneable audio filter?
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| 10 responses total. |
krokus
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response 1 of 10:
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Jun 15 22:09 UTC 2006 |
I did a bit of searching, and found the manual on Grove's website.
http://www.grove-ent.com/ATS-505_e.pdf
According to the manual, the "Clarify" control can be used to a 1.5kHz
resolution. While not great, I would say that's not too bad for most
uses.
What about feeding the audio to a computer, and using some sort of DSP
to narrow it further, if needed? (I'd be surprised if someone hasn't
written something to do this type of thing.)
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tod
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response 2 of 10:
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Jun 15 23:42 UTC 2006 |
Make sure you use an attenuator cable for the headphone feed to the aux in
on your computer and you should be fine.
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gull
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response 3 of 10:
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Jun 16 23:40 UTC 2006 |
Modern headphones require only milliwatts of power, so if it's a
headphone jack (as opposed to a speaker jack), it may already have an
attenuator built in. I've often run headphone outputs of things like
iPods and portable CD players into the line inputs of amps and sound
cards, and I've never had a problem. If the signal is too strong, the
distortion will let you know.
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ball
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response 4 of 10:
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Jun 17 02:22 UTC 2006 |
Re #1: I read something today that suggested the Sony ICF-
SW7600GR was better than the ATS-505, that it includes CW
and it doesn't seem to cost much more. Thanks for the link
to the manual though, I'll have a look at that.
Re #2 & #3: It's a shame that more devices don't include a
line-level output.
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krokus
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response 5 of 10:
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Jun 22 14:08 UTC 2006 |
re 4
Most people have no use for a line-level interface, the hobbiest is
the oddity in that regard. But as was pointed out, the headphone/earphone
jack output is typically sufficient, and works well. Since a line-level
input is a high impedence, and the headphone output is low impedence, it
works just fine as a "voltage transfer" vice a usual signal transfer.
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ball
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response 6 of 10:
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Jun 23 23:22 UTC 2006 |
Re #5: I'm an oddity in many regards. I wish that all (or
at least most) audio devices had line in and out as
appropriate. I wish that most things with a microprocessor
had an optional RS422 or RS232 serial port and a
documented command set. In unix I can connect together
individual commands and use them in ways that the original
authors might never have imagined. I appreciate the
ability to do the same thing with hardware, and miss that
when it's not there. I can understand manufacturers
skimping on hardware to save money, but sometimes the
ports are there and it's just down to unimaginitive firm-
ware writers.
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gull
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response 7 of 10:
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Jun 26 19:17 UTC 2006 |
Or sometimes the ports and the firmware are there, but it's down to
companies trying to protect their proprietary peripheral market.
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ball
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response 8 of 10:
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Jun 27 01:08 UTC 2006 |
That too, which is an equally crappy reason.
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gull
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response 9 of 10:
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Jun 28 18:38 UTC 2006 |
I run into this a lot in my current job. There are several
manufacturers of surveillance camera equipment. While NTSC video is,
of course, standard, everyone has their own proprietary protocol for
controlling things like pan/tilt/zoom mechanisms, effectively locking
you into their product line.
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omni
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response 10 of 10:
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Jan 7 07:37 UTC 2007 |
I like my ats-505.
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