Search found 137 matches

by DaveB
Thu Jul 05, 2018 2:37 pm
Forum: SDR Antennas
Topic: magnetic loop and pre-amp?
Replies: 5
Views: 540

Re: magnetic loop and pre-amp?

Hi Tory, See my post in this forum regarding my shielded magnetic loop. Here's a link to the original construction article by PA0FRI: article.https://pa0fri.home.xs4all.nl/Ant/Active%20antenna/Active%20receiving%20%20loop%20antenna%20eng.htm It is untuned - and feeds an original SDRPlay RSP (not a 1...
by DaveB
Sat Jun 02, 2018 3:45 pm
Forum: SDR Antennas
Topic: Home built Shielded magnetic loop for LW to HF
Replies: 0
Views: 398

Home built Shielded magnetic loop for LW to HF

With zero VHF activity up until early May I decided to attempt making a magnetic loop antenna for MW-HF. The one that appeared to be most likely to work was a shielded magnetic loop. A design published by PA0FRI was the starting point and it used a standard MMIC chip which happens to be available as...
by DaveB
Sat Apr 21, 2018 8:16 pm
Forum: SDR Antennas
Topic: Using a Wellbrook ALA1530LN on an RSP2
Replies: 4
Views: 1242

Re: Using a Wellbrook ALA1530LN on an RSP2

Paul - the two diagrams in you last attachment are for different RSPs. The left hand one is for an RSP/RSP1, the right hand one is for the RSP2. There are no filters on the HiZ input - check out the document "Optimizing RSP1A performance below 60 MHz" on the SDRPlay web-site See the pararg...
by DaveB
Tue Feb 20, 2018 11:41 pm
Forum: SDRplay related
Topic: SDRPlay RSP1 & SDR#?
Replies: 11
Views: 3394

Re: SDRPlay RSP1 & SDR#?

Maybe be, we could have cross exchanges between SDRPLAY team and SDRsharp team to integrate airspy in sdruno and sdrplay in sdrsharp That is very unlikely to happen. Would you expect Apply to write software to allow Android users to access iPad programs? and provide it for free! One of the problems...
by DaveB
Sun Feb 18, 2018 8:23 pm
Forum: SDRplay related
Topic: SDRPlay RSP1 & SDR#?
Replies: 11
Views: 3394

Re: SDRPlay RSP1 & SDR#?

I absolutely rely on SDR# 1361 to run SDRPlay RSP. I've used it since it was released - and thank goodness I always installed new builds into a new folder as after that SDR# doesn't support SDRPlay. The entire folder is backed up in various places! My niche hobby is FM DX and I need to be able to de...
by DaveB
Fri Dec 01, 2017 12:19 pm
Forum: General
Topic: SDRplay questions
Replies: 3
Views: 1692

Re: SDRplay questions

You have two options to remove a strong FM transmitter. The first option is built into the RSP1A - an FM band rejection filter. The second option for a specific frequency is a double tuned notch filter - this will give 60 dB rejection on one channel. The RSP1A would have to be the choice for your re...
by DaveB
Wed Nov 22, 2017 11:51 am
Forum: SDRplay related
Topic: RSP1 and 14 bit resolution
Replies: 3
Views: 1821

RSP1 and 14 bit resolution

If I have read things correctly the RSP1A and RSP1 use the same Mirics chip and SDRPlay have "unlocked" a feature in to provide 14 bit ADC in sample rates of 6 MHz and below. Does that mean that the latest API and ExtIO will allow the RSP1 to run at 14 bits ADC at less than 6 MHz sample ra...
by DaveB
Thu Nov 16, 2017 11:33 pm
Forum: SDRplay related
Topic: RSP1A and SDR#
Replies: 4
Views: 2231

Re: RSP1A and SDR#

I'm sorry to mention sdr# here... :oops: Anyway... I got a SDRplay RSP1 (blue and gray plastic box) in 2014 and I'm currently running it with srd# 1361 using ExtIo3.8.3 Don't apologise! I have the same set up and was about to post the same question. I must have bought my RSP1 in January 2015 - and ...
by DaveB
Fri Apr 28, 2017 10:32 pm
Forum: General
Topic: Extreme narrow band
Replies: 6
Views: 3312

Re: Extreme narrow band

The most likely reason the signal appears as a hill rather than a peak is the resolution of the FFT display in the spectrum. Narrow band modes isn't my thing - I'm into FM DX-ing - but I did a bit of checking on v3. If you click on the View Tab and click on the Resolution icon in the toolbar that ap...
by DaveB
Sat Mar 11, 2017 11:32 am
Forum: General
Topic: Interference identification?
Replies: 37
Views: 16165

Re: Interference identification?

Interestingly the gaps in the frequency correspond to amateur radio bands plus a small guard band either side. - so someone is avoiding upsetting the amateur radio community :)

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