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24029

Re: Birds... and bats OK, http://78.46.38.217/amb9u is running, a single mic element feeding both preamp inputs. Very noisy on /amb9 but I see the lighter click test is present on

Tom Becker
2:52 PM
#24029
 

Messages List

24028

Re: Birds... and bats ... I'll be following that test with interest. If pulses are still missing it would point to a fault somewhere in vlfrx-tools. -- Paul Nicholson --

Paul
2:30 PM
#24028
 

Messages List

24027

Re: Birds... and bats ... A multi-element array will exhibit a pattern, sure, but I built two single-element mics (see image) to remove directionality as a possible explanation for

Tom Becker
1:24 PM
#24027
 

Messages List

24026

Re: Birds... and bats ... You can consider the wavelength L of the sound wave. Given the speed of sound c=343 m/s at 20°C (331m/s at 0°C) and the frequency F 23000Hz L = c/F =

Claudio Pozzi
8:40 AM
#24026
 

Messages List

24025

Re: Sound card dongles Interesting when I bought last year both bubble-packs were properly sealed. The C-Media HS100 is a much shorter dongle so there would have been no way of

Alan Melia
8:05 AM
#24025
 

Messages List

24024

Sound card dongles I see Paul has provided a suitable review for this Amazon web site! Also looking at the other photos on the Amazon web - the package is identical to the eBay

Terry GW0EZY
7:15 AM
#24024
 

Messages List

24023

subject=Re: [VLF_Group] Re: Simple SID monitor with the Raspberry Pi Hi, From my experience the CM108 is pretty useless. I've tried them in my Raspberry Pi in a VLF receive setup , and the spectrogram up to 24 Khz shows a whole

Frister
6:06 AM
#24023
 

Messages List

24022

Re: Simple SID monitor with the Raspberry Pi Interesting Terry the header does not say its an SD-AUD20101 and the pic is of this device plus the description still has the "24bit 192ksps" but his revews

Alan Melia
5:13 AM
#24022
 

Messages List

24021

Re: Simple SID monitor with the Raspberry Pi The cards have been delivered today and tested on an Intel Atom + Ubuntu + vlfrx-tools I ordered three dongles from Amazon

Terry GW0EZY
4:44 AM
#24021
 

Messages List

24020

Re: Simple SID monitor with the Raspberry Pi Hi Both, Oh what a surprise :-).....sorry my cynical side showing again....I complained to Amazon using their proceedure but then corresponded directly with

Alan Melia
4:43 AM
#24020
 

Messages List

24019

Re: Simple SID monitor with the Raspberry Pi Oh dear! I am expecting my Amazon dongles today, I guess I will have the same problem as I followed your previous link. Alan G3NYK said that after he

Terry GW0EZY
2:58 AM
#24019
 

Messages List

24018

Re: Simple SID monitor with the Raspberry Pi I just received 3 sound dongles from Amazon, http://www.amazon.co.uk/gp/product/B006SF68P2 but they are the wrong type. They are C-Media based, not the

Paul
2:19 AM
#24018
 

Messages List

24017

Re: suggestions for GPS pps pulse I use a 74HC04 hex inverter. One of the inverters is driven by the PPS and its output feeds the other five inverters each of which has its own RC network to

Paul
1:50 AM
#24017
 

Messages List

24016

suggestions for GPS pps pulse   Howdy!Anyone got a good design for a way to distribute a GPS pps pulse to multiple cards for VLFrxtools?I've fiddled around with some transistor amp

Raht Dragon
7:28 PM
#24016
 

Messages List

24015

SUMMARY: X-Ray Event exceeded M5 (R2) Space Weather Message Code: SUMXM5 Serial Number: 134 Issue Time: 2015 Mar 03 0158 UTC SUMMARY: X-ray Event exceeded M5 Begin Time: 2015 Mar 03 0125 UTC

SWPC Product Subscription Service
5:58 PM
#24015
 
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