Search found 53 matches

by aurgathor
Tue Apr 23, 2019 12:37 am
Forum: Other SDR Devices
Topic: Ham It Up + Cubic SDR problem
Replies: 1
Views: 114

Re: Ham It Up + Cubic SDR problem

Unless you do some input filtering, you'll get both up and down converted products.

Use a low pass filter (say, 100 Mhz) between the antenna and the ham-it-up.
by aurgathor
Thu Apr 18, 2019 5:38 pm
Forum: RTL-SDR Discussion
Topic: rtl-sdr .usb problem
Replies: 1
Views: 102

Re: rtl-sdr .usb problem

Re-run zadig
by aurgathor
Wed Apr 17, 2019 2:57 pm
Forum: Off-Topic
Topic: USB cable
Replies: 2
Views: 227

Re: USB cable

Any size of extender cable should work as long as it can handle the roughly 300 mA without a significant voltage drop and it's not too bad otherwise. I bought some 6" pigtail extender cables for the exact same reason from monoprice 5+ years ago and they work fine with RTL-SDR dongles. (monoprice no ...
by aurgathor
Sun Apr 14, 2019 1:19 am
Forum: Other SDR Devices
Topic: Why Tx/Rx devices are so expansives ?
Replies: 9
Views: 17965

Re: Why Tx/Rx devices are so expensive?

RichardsonRFPD will conduct several one day seminars in the US for mere $150, and that price will include a Pluto SDR learning module. If someone can attend one without paying for hotel and airfare, I think the complete package is a steal at that price. The Pluto itself is over $140 from Mouser. Key...
by aurgathor
Mon Feb 25, 2019 4:30 am
Forum: Antennas
Topic: broken antenna
Replies: 1
Views: 391

broken antenna

The top of the included "23cm to 1m telescopic antenna" broke off after the second section-- is there an exact replacement available somewhere? (part number or link) Looking at eBay, comparable antennas are available from around $1.50 apiece, but the 1 m long antennas utilize 7 section vs. 5 for the...
by aurgathor
Wed Feb 20, 2019 8:18 pm
Forum: Other SDR Devices
Topic: Check out the specs on THESE receivers!
Replies: 2
Views: 4414

Re: Check out the specs on THESE receivers!

That could be the MSRP, and one could probably get one for a mere $50k or so nowadays.... :roll:

At my previous work place they've got a couple of R&S signal and spectrum analyzers, but I only got to use the ancient HP spectrum analyzers.
by aurgathor
Wed Feb 20, 2019 8:07 pm
Forum: Other SDR Devices
Topic: Hackrf one - increase RX-TX
Replies: 7
Views: 14526

Re: Hackrf one - increase RX-TX

LOL. ;) You can most certainly argue that an amplifier is an amplifier and you can use an LNA in both places, but what you normally want to use for TX is an RF power amplifier. https://en.wikipedia.org/wiki/RF_power_amplifier While *in theory* one can certainly make an amplifier that could work in b...
by aurgathor
Thu Feb 14, 2019 7:40 pm
Forum: Other SDR Devices
Topic: Hackrf one - increase RX-TX
Replies: 7
Views: 14526

Re: Hackrf one - increase RX-TX

If something is available anywhere, the first 2 places to go to look for them are eBay and Amazon. :!: Using the search terms of "LNA 433 MHz" I got 16 hits on eBay for 2 - 3 different types of LNAs. Looks to me one type ($40+) comes with a SAW filter, the others (under $20) probably don't. Note wel...
by aurgathor
Thu Feb 07, 2019 3:20 am
Forum: RTL-SDR Discussion
Topic: home use server setup to support RTL-SDR dongle
Replies: 3
Views: 11585

Re: home use server setup to support RTL-SDR dongle

What is your budget?

Here at work we are using lots of SFF (Small Form Factor) Dell Optiplexes in test stations, and they are very nice for what we use them. Depending on configuration and whether you want something new, or used is OK, they can run anywhere from around $100 to $1000 or so.
by aurgathor
Wed Feb 06, 2019 2:48 am
Forum: Other SDR Devices
Topic: Hackrf one - increase RX-TX
Replies: 7
Views: 14526

Re: Hackrf one - increase RX-TX

Unless you really know what you are doing, you probably don't want to mod your board. But to get an "increased RX", there a number of different LNAs available from various sources. However, normally you would also want a band pass filter or two to go with it. Also, remember that antennas can make a ...