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TV tuner 45MHz to 10.7 MHz or 455KC IF module was Re: FW: [Discuss-gnura


From: tongaloa
Subject: TV tuner 45MHz to 10.7 MHz or 455KC IF module was Re: FW: [Discuss-gnuradio] MicroTune Tuners
Date: Thu, 17 Apr 2003 19:10:37 -0500
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.1) Gecko/20020830

Don't know if these will be useful or not.
Bandwidth is not there for TV.

I bought a bunch for a weather satellite receiver project that
has been slow in coming together (too many projects)

Have some IF modules that might be useful with the 45MHz out TV
tuners...

They are made for approx. 30kHz wide FM but you could always
grab the 10.7MHz before or after the filter...

Photos and documentation at.
http://edebris.com/catalog/view_item.php?id=256

Thumbnails to hires select 'original' to read.
Sorry for jpeg artifacts...but they are readable...

$10 for two incl postage for USA
$13 for two, incl postage for outside USA (unless you live
somewhere that require my filling out a load of paperwork)

-Bob


Eric Blossom wrote:
On Thu, Apr 17, 2003 at 04:07:56PM -0500, H. R. Myler (@ MacLULU) wrote:

Hobbyists ought to look to old cable tuners and scavenge if they can't convince MicroTune to cough up a module or two.


Not a bad idea, though you'll be screwed without documentation.
Also, this means an never ending expansion of tuners, interfaces and
specs.  Not exactly the way to get things to move forward quickly.

I suspect that if there's anyone out there who's willing, Microtune
would be delighted to sell you a box of the tuners, and then you could
be the local distributor for this group.  IIRC, the smallest box on
their list was 72 units.

Brian, I'm not sure if you're aware or not, but the microtune "tuner"
is actually a complete tuner module in a can.  What you get is a
module that will tune from 50M to about 860M with an IF of 5.75M.  If
you know of a better / cheaper / more available solution, please let
us know.  Also, most TV tuners have a higher IF, around 46MHz.  That's
workable, but will require either bandpass sampling (46MHz IF, with
20MS/sec sample rate would probably work), or requires a final
downconversion.

Eric


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