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Author Topic: SDR-IQ Alternative?  (Read 9139 times)

Offline S. McArdle

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SDR-IQ Alternative?
« on: January 30, 2014, 1612 UTC »
I've been thinking of purchasing one of these.  I understand it will allow u to record 192 khz of band spectrum to hard drive for later searching/replaying.  Are there any other, cheaper alternatives out there that will allow one to record this amount or more, of band spectrum to hard drive?  How about recording 2 separate bands at once to hard drive?  Thanks in advance.  Regards, Scott.
Kenwood TS-590,75m square loop up 43' for all prior to 1-11-15, then ocf inv vee at 80' beginning 1-11-15. Best 73's de Scott, 3500 S. Boulevard,Suite 18C,Edmond,OK 73013
PLS QSL to:mcardlelawoffice(at)netzero(dot)com. 1st ever pirate logged was The Voice of Anarchy on 1-17-98

Offline ChrisSmolinski

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Re: SDR-IQ Alternative?
« Reply #1 on: January 30, 2014, 1634 UTC »
There's also the AFEDRI.

The netSDR, while certainly not cheaper, does have the capability to produce I/Q streams for two separate bands. I am not aware of any software taking advantage of this yet, however. I keep prodding the SdrDx author, but no luck yet. Maybe if some other netSDR owners mention it to him... :-)
Chris Smolinski
Westminster, MD
eQSLs appreciated! csmolinski@blackcatsystems.com
netSDR / AFE822x / AirSpy HF+ / KiwiSDR / 900 ft Horz skyloop / 500 ft NE beverage / 250 ft V Beam / 58 ft T2FD / 120 ft T2FD / 400 ft south beverage / 43m, 20m, 10m  dipoles / Crossed Parallel Loop / Discone in a tree

Offline S. McArdle

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Re: SDR-IQ Alternative?
« Reply #2 on: January 30, 2014, 1717 UTC »
thanks chris.  a cursory check seems to show that the afedri can record way much more band spectrum, at about half the price.  i'll keep checking them out.
Kenwood TS-590,75m square loop up 43' for all prior to 1-11-15, then ocf inv vee at 80' beginning 1-11-15. Best 73's de Scott, 3500 S. Boulevard,Suite 18C,Edmond,OK 73013
PLS QSL to:mcardlelawoffice(at)netzero(dot)com. 1st ever pirate logged was The Voice of Anarchy on 1-17-98

Offline desmoface

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Re: SDR-IQ Alternative?
« Reply #3 on: January 30, 2014, 1727 UTC »
I'm happy with the Afedri, you can see some samples of it on my youtube channel under "desmoface."

Steve
Kenwood TS-870SAT
Full Wave 80 Meter Horizontal Loop ~ 260 Ft Long
Pse qsl to Kb8viv @ yahoo . com
NE Ohio

Offline thechoat

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Re: SDR-IQ Alternative?
« Reply #4 on: February 01, 2014, 1459 UTC »
I bought an afedri back before christmas and im really happy with it.I havnt had any problems so far seems to work great.
Oklahoma
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Afedri SDR or Icom 746, home made OCF dipole

Offline Andrew Yoder

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Re: SDR-IQ Alternative?
« Reply #5 on: February 01, 2014, 1645 UTC »
Has anyone used the Cross Country Wireless SDR-4+? I think it also looks interesting:

http://www.crosscountrywireless.net/sdr-4.htm
Please QSL to: POB 109, BRS, PA 17214
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Offline ChrisSmolinski

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Re: SDR-IQ Alternative?
« Reply #6 on: February 01, 2014, 1733 UTC »
Has anyone used the Cross Country Wireless SDR-4+? I think it also looks interesting:

http://www.crosscountrywireless.net/sdr-4.htm

It looks like a Soft Rock variant?
Chris Smolinski
Westminster, MD
eQSLs appreciated! csmolinski@blackcatsystems.com
netSDR / AFE822x / AirSpy HF+ / KiwiSDR / 900 ft Horz skyloop / 500 ft NE beverage / 250 ft V Beam / 58 ft T2FD / 120 ft T2FD / 400 ft south beverage / 43m, 20m, 10m  dipoles / Crossed Parallel Loop / Discone in a tree

Offline BDM

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Re: SDR-IQ Alternative?
« Reply #7 on: February 01, 2014, 1837 UTC »
Has anyone used the Cross Country Wireless SDR-4+? I think it also looks interesting:

http://www.crosscountrywireless.net/sdr-4.htm

Note, it appears to only cover a portion of the BC band if that matters? Starting at 850 kHz.
Radios -- Perseus SDR // SDRPlay RSPdx // Icom IC-7300 // Tecsun PL-660 // Panasonic RF-5000A --Antennas-- Pixel Pro 1B loop - 82' fan-dipole at 40' - tuned MW/BCB 40" loop and 100' receive only dipole
-Brian--North of Detroit--MI-
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Offline Andrew Yoder

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Re: SDR-IQ Alternative?
« Reply #8 on: February 01, 2014, 2306 UTC »
Thanks for the responses. BDM: I did notice that its range ends at 850. That's probably OK for me--at least pirates are currently on 1710 and not 530 kHz. CS: Is that a good or bad thing if it's a Soft Rock variant? I've been trying to evaluate what I'd need/best use. I had originally thought that I should pay more for a really good SDR--something that I could regularly record the European band range with and maybe be equivalent to an NRD-535, but lately I've been thinking maybe I should just go more into the Afredi/RF Space range and use it to supplement my analog receivers. As you can see, I'm not exactly an impulse buyer...
Please QSL to: POB 109, BRS, PA 17214
Hobby Broadcasting Blog: http://hobbybroadcasting.blogspot.com/
Drake R8, AOR AR-7030, R-390A, R-388, SX-28A, Philco 44 + some others    Horizontal loops & 1/2-wave inverted V

Offline BDM

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Re: SDR-IQ Alternative?
« Reply #9 on: February 02, 2014, 0027 UTC »
. As you can see, I'm not exactly an impulse buyer...

No, you mean a smart buyer ;) Better safe than sorry with a product you dislike and wasted money 8)
Radios -- Perseus SDR // SDRPlay RSPdx // Icom IC-7300 // Tecsun PL-660 // Panasonic RF-5000A --Antennas-- Pixel Pro 1B loop - 82' fan-dipole at 40' - tuned MW/BCB 40" loop and 100' receive only dipole
-Brian--North of Detroit--MI-
1710/KHz the MW Pirate Clear Channel (not so much anymore "sigh")

Offline ChrisSmolinski

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Re: SDR-IQ Alternative?
« Reply #10 on: February 02, 2014, 0133 UTC »
Thanks for the responses. BDM: I did notice that its range ends at 850. That's probably OK for me--at least pirates are currently on 1710 and not 530 kHz. CS: Is that a good or bad thing if it's a Soft Rock variant? I've been trying to evaluate what I'd need/best use. I had originally thought that I should pay more for a really good SDR--something that I could regularly record the European band range with and maybe be equivalent to an NRD-535, but lately I've been thinking maybe I should just go more into the Afredi/RF Space range and use it to supplement my analog receivers. As you can see, I'm not exactly an impulse buyer...

If you want to record a band, then this type of an SDR isn't going to work for you, the bandwidth isn't enough. You need something like an AFEDRI or an SDR-IQ / netSDR.
Chris Smolinski
Westminster, MD
eQSLs appreciated! csmolinski@blackcatsystems.com
netSDR / AFE822x / AirSpy HF+ / KiwiSDR / 900 ft Horz skyloop / 500 ft NE beverage / 250 ft V Beam / 58 ft T2FD / 120 ft T2FD / 400 ft south beverage / 43m, 20m, 10m  dipoles / Crossed Parallel Loop / Discone in a tree

Offline Beerus Maximus

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Re: SDR-IQ Alternative?
« Reply #11 on: February 09, 2014, 2021 UTC »
I'm glad Afedri owners here seem happy with theirs but I did read some other stories about bad overload issues. It probably depends on your environment. I'm a NetSDR guy myself but that's 3x the cost of an SDR-IQ.
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Offline jFarley

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Re: SDR-IQ Alternative?
« Reply #12 on: February 09, 2014, 2222 UTC »
I use an SDR-IQ, and plan to pick up an Afedri in a bit.  I am really not that concerned about overloading issues for the simple reason that I prefer to use highly resonant loops when possible.  This form of antenna represents a tunable bandpass filter ahead of the receiver, which goes a long way to protecting a receiver from the nasties.
Joe Farley, Near Chicago
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Offline DimBulb

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Re: SDR-IQ Alternative?
« Reply #13 on: February 10, 2014, 0122 UTC »
Got my Afedri running last Friday.  I found that if I had the RF gain cranked up I'd get lots of images from local AM broadcast stations.  Leaving RF gain at around +10 with the FE gain at 2.00 seems to fix all the problems and still have plenty of sensitivity.
« Last Edit: February 10, 2014, 0125 UTC by DimBulb »
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Offline zackers

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Re: SDR-IQ Alternative?
« Reply #14 on: February 19, 2014, 2122 UTC »
I have been playing with an RTL2832 USB stick SDR. These things are cheap and plentiful on eBay now. They do not use a soundcard for I/Q processing and will cover up to a 3 MHz bandwidth. The frequency range is given as 26 to 1700+ MHz. They do work great at 26 MHz but performance drops off fast below that frequency. I've been using mine with HDSDR and SDR# software.

I haven't tried this yet, but an upconverter may be a way to record a couple MHz worth of shortwave spectrum. Maybe convert shortwave up to to 40 to 50 MHz or even higher.
East Central Illinois
TS-850S, 40 meter full-wave loop, various dipoles