Search found 129 matches

by DaveB
Sat Apr 02, 2016 11:49 am
Forum: SDRplay related
Topic: Introduction to Panadapters with SDR
Replies: 1
Views: 1092

Re: Introduction to Panadapters with SDR

Another source of information and adapter kits for a number of popular transceivers is g4hup.com. I purchased a PAT50M to fit to my Lowe HF225 receiver as I wanted to take advantage of the front end band-pass filters to improve image rejection on HF. It worked very well. It was easiest to use it wit...
by DaveB
Fri Apr 01, 2016 9:45 pm
Forum: SDRplay related
Topic: ADC Setpoint not working
Replies: 4
Views: 1803

Re: ADC Setpoint not working

I only know the Windows platform - but what Mirics API are you using? When API 1.8.0 was released the interaction between the LNA gain and the tuner gain was changed and caused a 20 dB jump in overall gain at the changeover point. This was corrected in a few days later in API 1.8.1. Is it possible t...
by DaveB
Thu Mar 31, 2016 8:38 pm
Forum: General
Topic: Sdr-console V3 Preview is out
Replies: 11
Views: 5017

Re: Sdr-console V3 Preview is out

I've downloaded it to a Windows 8.1 machine and tried it on SDRPLay only. I look forward to further releases with keen interest especially when RDS decoding is incorporated. I'm sure the test team are busy scrutinising it to the nth degree to weed out the bugs etc. I wonder if Simon will get the RDS...
by DaveB
Thu Mar 31, 2016 9:53 am
Forum: General
Topic: Suggested 6M and VHF gain settings?
Replies: 1
Views: 1052

Re: Suggested 6M and VHF gain settings?

Possibly the simplest way is to run with LNA and then set AGC on. Then see what figure the IF gain ends up at. It obviously depends on what stations are about. For the FM broadcast band somewhere between - 45 and - 65 is 'normal'.
by DaveB
Thu Mar 31, 2016 6:21 am
Forum: SDRplay related
Topic: ADC Setpoint not working
Replies: 4
Views: 1803

ADC Setpoint not working

I don't normally move the setpoint from -20dB but in the past doing so had an effect on the noise floor and if set to 0 dB or just under could end up with overload. I was chasing down a varying noise floor (possible local off frequency transmitter?) and found that with the current version changing t...
by DaveB
Mon Mar 14, 2016 5:39 pm
Forum: General
Topic: SDRPlay simple modifictions
Replies: 3
Views: 2376

Re: SDRPlay simple modifictions

Did the shielding make a difference? I just wrapped my MkI in a couple of layers of aluminium kitchen foil. A cable tie ensured it was grounded to the antenna. It basically eliminated the 'hash' from the background when listening on an adjacent analogue FM tuner - and removed lots of spikes on the ...
by DaveB
Fri Feb 19, 2016 11:37 pm
Forum: General
Topic: SDRPlay, HDSDR, Ham Radio Deluxe, IF Out?
Replies: 1
Views: 1622

Re: SDRPlay, HDSDR, Ham Radio Deluxe, IF Out?

In HDSDR under "Options" (F7) click on the menu item "RF Front End and Calibration". The left hand section deals with SDR hardware coupling. I've added an IF output for my Lowe HF-225 which gives a 45 MHz signal - so I set it to "Manually" controlled and "Independe...
by DaveB
Thu Feb 18, 2016 12:29 am
Forum: SDRplay related
Topic: Spurious signals at low gain
Replies: 7
Views: 2851

Re: Spurious signals at low gain

Just to add more to the spurious signal debate - in low IF mode you can get IF images. I can find weak signals from BBC Radio 2 on 85.0 and 85.9 MHz on the SDR Play - and I can also find IF images on the RTL820T2 at twice the sampling rate. The SDRPlay ones work out as follows. Sampling rate 8.2 MHz...
by DaveB
Tue Feb 16, 2016 7:21 pm
Forum: General
Topic: SDRPlay connection with Yaesu FT5000
Replies: 8
Views: 4391

Re: SDRPlay connection with Yaesu FT5000

There is a Span button that allows you to choose the bandwidth displayed but the maximum you can get this way is 5 MHz. To set the visible bandwidth in SDRConsole to 8 MHz you have to drag the edges of the red zone on the bottom frequency bar to widen it out. I just wish I could find a way to keep t...
by DaveB
Mon Jan 25, 2016 11:26 pm
Forum: SDRplay related
Topic: AM images on LF and MF range
Replies: 2
Views: 1531

Re: AM images on LF and MF range

A good quality low pass filter with a suitable cut-off is the only way to get rid of these 'images'. It might comfort you to know that the much more expensive SDRs requires filters to remove break through from strong stations.

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