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Author Topic: New cheap HP SDR  (Read 4864 times)
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w3jn
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« on: May 08, 2011, 11:30:54 AM »

Saw this on eBay, $350.  Has dual inputs, 64 MHz ADC and AGC ahead of the ADC input.

http://cgi.ebay.com/SDR-MK1-Radio-Shortwave-Receiver-/260781004036?pt=Shortwave_Radios&hash=item3cb7c25504

More info here http://uvb-76.blogspot.com/p/sdr-project-mk1.html

Doesn't say what the sensitivity is, or if you can do diversity, simultaneous receive with the 2 inputs, etc.  However the guy's blog offers more information than most, and doesn't presuppose knowledge of cutesy codenames for boards, etc.
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KF1Z
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Are FETs supposed to glow like that?


« Reply #1 on: May 08, 2011, 03:12:14 PM »

I think I'll wait until they are actually manufactured, and get some feedback from users.

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WB6NVH
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« Reply #2 on: May 10, 2011, 05:41:23 AM »

Yes, quite.  The seller is in Estonia and I can't see too many people putting out $ 350 for a pre-sale item since it appears that between the 30 days to availability and the shipping and customs delays, you would lose your eBay Buyer Protection. 
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Geoff Fors
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« Reply #3 on: May 11, 2011, 11:01:22 AM »

Maybe the lads will come out with one soon.
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K1JJ
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"Let's go kayaking, Tommy!" - Yaz


« Reply #4 on: May 11, 2011, 11:14:55 AM »

Maybe the lads will come out with one soon.


The "lads?"  You wouldn't mean the Nigerian lads, would you?   Wink

Yes, AGC before the ADC wud be nice. Either that or a good preselector. I need it badly with my HPSDR when the preamp is on above 40M.

I'm thinking a good name for the new board might be "Joe" or "Max" or "Spike"... rather than those girly-man HPSDR names.  Grin

T
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Use an "AM Courtesy Filter" to limit transmit audio bandwidth  +-4.5 KHz, +-6.0 KHz or +-8.0 KHz when needed.  Easily done in DSP.

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There's nothing like an old dog.
WA1GFZ
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« Reply #5 on: May 11, 2011, 12:09:48 PM »

AGC ahead of A/D is useless above 40M. HPSDR has a 20dB pad switched in when you turn the preamp off.
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w3jn
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« Reply #6 on: May 11, 2011, 01:05:54 PM »


I'm thinking a good name for the new board might be "Joe" or "Max" or "Spike"... rather than those girly-man HPSDR names.  Grin

T

Since it's from Estonia, perhaps Vlad or Igor.
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