Search found 49 matches

by bubblegumpi
Fri Nov 04, 2016 2:50 am
Forum: SDR Antennas
Topic: Home made VHF/UHF antenna
Replies: 0
Views: 4497

Home made VHF/UHF antenna

This is made from solid copper wire about 18" for the long part and 5" for the little part. This was after a radio shack "VHF high/UHF" ant. I bought. The lower three parts are not connected but act as a ground plane. I tried grounding the lower parts but seemed to be the same. A...
by bubblegumpi
Wed Nov 02, 2016 12:47 pm
Forum: SDR Antennas
Topic: TINY homemade UHF ant. WORKS
Replies: 3
Views: 3008

TINY homemade UHF ant. WORKS

This antenna works really well, even does an excellent job down to the FM broadcast and picks up the "problem AM station" down in the SW frequencies. Its made from three pieces of solid copper wire at 45' angles to the center aligator clip and solder and soldering braid. Does this preserve...
by bubblegumpi
Tue Nov 01, 2016 3:18 am
Forum: General
Topic: AM broadcast stations on evry band to 30 MHz?!
Replies: 11
Views: 3933

Re: AM broadcast stations on evry band to 30 MHz?!

Now I just need to play "find the F to BNC adapter" again, does it have to be 50 ohms Do you mean BNC/SMA? 73s, Heinrich My house is an F connector household, none of this fancy SMA business, I put my radio in a box with an F connector and I have a hundreds of feet of coax I found in the ...
by bubblegumpi
Mon Oct 31, 2016 4:16 am
Forum: General
Topic: AM broadcast stations on evry band to 30 MHz?!
Replies: 11
Views: 3933

Re: AM broadcast stations on evry band to 30 MHz?!

Did you use a 9:1 UNUN ("BALUN") like in http://www.ebay.com/itm/100K-50MHz-RTL-SDR-Supporting-long-Antenna-9-1-Impedance-Transformer-Balun-BNC-S-/262606063719?hash=item3d248a8867:g:pAgAAOSw9IpXyX05 That would be needed for any longwire, not sure that it will help with your problem, but n...
by bubblegumpi
Mon Oct 31, 2016 3:17 am
Forum: General
Topic: How big would the SDRPlay be if it was made from through hole parts?!
Replies: 1
Views: 1717

How big would the SDRPlay be if it was made from through hole parts?!

I was amazed at how big (tiny) the filters were when I opened mine up.How big do you think this would be if it was made in the 1980's? I didn't think you could make RF stuff that small. It would have to be at least the size of a pizza box (thats 12"X12" here in 'merica,or as we call it a &...
by bubblegumpi
Mon Oct 31, 2016 3:11 am
Forum: General
Topic: Should your RF ground connect all the way to the SMA jack?
Replies: 2
Views: 2028

Should your RF ground connect all the way to the SMA jack?

I like to listen to HF with my SDR so I set up a 58' long wire that runs out my 2nd floor window and goes almost level to a tree in the back yard. It ties to the tree about 10' off the ground, A nice straight wire running 45' away from the house . At the window the wire connects to the center pin of...
by bubblegumpi
Fri Oct 28, 2016 5:24 pm
Forum: General
Topic: AM broadcast stations on evry band to 30 MHz?!
Replies: 11
Views: 3933

Re: AM broadcast stations on evry band to 30 MHz?!

Every signal that comes in below 30MHz has the same religious station right on top of it, totally swamping out the real signal. I can see the real signal but can't hear it. This sucks, its useless now I;m tempted to put the noisy power supply back. I would like to build a trap filter but I have no i...
by bubblegumpi
Fri Oct 28, 2016 5:12 pm
Forum: General
Topic: AM broadcast stations on evry band to 30 MHz?!
Replies: 11
Views: 3933

Re: AM broadcast stations on evry band to 30 MHz?!

So click the EXW button and adjust which NB? too low and I get nothing then too high is over load, no sweet spot. Where is LNA? I'm going blind so this is tough.
by bubblegumpi
Fri Oct 28, 2016 11:56 am
Forum: General
Topic: AM broadcast stations on evry band to 30 MHz?!
Replies: 11
Views: 3933

AM broadcast stations on evry band to 30 MHz?!

I have been little by little improving my sdr. So now it seems I just pick up AM stations on every signal below 30MHz; i.e. When a time signal beeps on say 3.300 or 5.000 the AM comes through loud and clear. This is after my last upgrade to the setup What I did in order. 1. Make a 58' long wire insi...
by bubblegumpi
Mon Oct 17, 2016 6:08 am
Forum: SDR Antennas
Topic: Where to get SMA Adapters that are 50 Ohm 2GHz? Do they exist?
Replies: 3
Views: 1997

Where to get SMA Adapters that are 50 Ohm 2GHz? Do they exist?

I'm starting to think they don't. I have a whole bunch of coax with F connectors on them. So searching on digikey I realized I was going to have to go SMA to BNC to F. Just two adapters, but it seems that I run into the problem of finding a 50 Ohm that goes to 2GHz. What do you guys run? I saw some ...

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