Search found 92 matches

by P-40 Warhawk
Wed Mar 30, 2016 11:57 am
Forum: RTL-SDR Discussion
Topic: Does the RTL SDR also function as an antenna tuner?
Replies: 7
Views: 9252

Re: Does the RTL SDR also function as an antenna tuner?

I don't know that their is a antenna tuner that go's higher than 30MHZ , I could be wrong . Most everything the he wants is higher .
Now for everything below 30MHZ a MFJ 1020 works quite well and it's just under a $100.00 , less if used .
by P-40 Warhawk
Tue Mar 29, 2016 8:46 pm
Forum: RTL-SDR Discussion
Topic: Does the RTL SDR also function as an antenna tuner?
Replies: 7
Views: 9252

Re: Does the RTL SDR also function as an antenna tuner?

Antenna tuners are not needed for receivers , they are used for transmitters .
by P-40 Warhawk
Sat Mar 26, 2016 1:33 pm
Forum: RTL-SDR Discussion
Topic: AM radio signals?
Replies: 2
Views: 5298

Re: AM radio signals?

You would have to do a hardware mod to the dongle . With out the mod your dongle will go down in infrequence to 24MHZ . The only other way is to use a up converter .
by P-40 Warhawk
Sun Feb 14, 2016 4:41 pm
Forum: RTL-SDR Discussion
Topic: Schematic for the RTL - SDR Tuner chip E4000
Replies: 0
Views: 7738

Schematic for the RTL - SDR Tuner chip E4000

I was surfing the web and come across a schematic for the E4000 SDR Dongle . It was at this wed site . (http://pandatron.cz/?3660&rtl_sdr-1+ )
by P-40 Warhawk
Wed Jan 20, 2016 2:49 pm
Forum: RTL-SDR Discussion
Topic: New HDSDR ever ?
Replies: 6
Views: 8989

Re: New HDSDR ever ?

I have to go along with what he has to say . I would even be willing to pay for new versions of HDSDR , and add on's that work with it .
by P-40 Warhawk
Fri Oct 02, 2015 11:30 pm
Forum: RTL-SDR Discussion
Topic: hf sdr rtl help
Replies: 2
Views: 6842

Re: hf sdr rtl help

Hi Phill! If I may stick my two cents in I would like to suggest a MFJ 1020 C it's a preselector it also has a RF AMP in it , and it works good . Frequency range is 300khz to 30Mhz . I use one myself and I am very happy with it . You might find that a FM trap might be needed you can get one of them ...
by P-40 Warhawk
Mon Jul 27, 2015 5:49 pm
Forum: RTL-SDR Discussion
Topic: HF Reception on RTL is low
Replies: 3
Views: 6540

Re: HF Reception on RTL is low

The MFJ 1020-c has a input and a output for external antenna in the back .
by P-40 Warhawk
Fri Jul 24, 2015 2:58 pm
Forum: RTL-SDR Discussion
Topic: direct sampling
Replies: 2
Views: 5792

Re: direct sampling

It's like a Crystal Radio that was a direct sampling device that go's almost to radios pre-history . It was used for AM radio . It was just a L/C circuit that tuned in a radio station and ran the RF a crossed a diode turning the RF to audio that went to ear phones . Direct sampling is were the RF wi...
by P-40 Warhawk
Fri Jul 24, 2015 2:02 pm
Forum: RTL-SDR Discussion
Topic: HF Reception on RTL is low
Replies: 3
Views: 6540

Re: HF Reception on RTL is low

Hi back at you . The people that sell the type of device that you got from ebay don't tell you that you need a RF amp and preselector witch is needed for the HF part of your device . The turner is bypassed by a matching transformer . With the turner being bypassed their is no amplification of the RF...
by P-40 Warhawk
Thu Jul 23, 2015 9:37 pm
Forum: RTL-SDR Discussion
Topic: HF Reception
Replies: 11
Views: 13731

Re: HF Reception

Try google.com also ebay.com last MFJ makes a prescaler witch is known as a preselector . I use a FM trap I got mine from Radio shack .