Brett, I am awaiting this - http://groups.yahoo.com/group/softrock40/message/71764 John - ke5ssh ... -- John Williams KE5SSH - ham since 2007 WQKA523 - GMRS...
72164
yl2gqn
Feb 8, 2013 11:51 pm
Hi Brett, I built a simple broadband PA on two low cost IRF510 mosfets to drive more solid PA. Schematic based on WA2EBY PA. With 12V PS you can easy get 5-7 W...
72165
netnovel2005
Feb 9, 2013 1:29 am
Hello, Dreambass has 24bit 96kHz sampling rate....
72166
warrenallgyer
Feb 9, 2013 7:18 am
Ken I have a USB X-Fi. Mine has no advantage whatsoever over the internal Realtek analog inputs to my MSI Netbook. The Realtek has 96 KHz capability, a...
72167
Kenneth Hardy
kenahardy
Feb 9, 2013 11:48 am
Warren Interesting about your comment on impulse noise hairs. I use Rocky quite a bit for CW QRP contacts because the noise level does not change and yes a...
72168
warrenallgyer
Feb 9, 2013 2:41 pm
Ken Ahhhh.... I completely understand and you are right. A USB card is your only option. Take some comfort in knowing you would not like what Win 7 does to...
72169
MIKE DURKIN
seth_otherpower
Feb 9, 2013 6:08 pm
I agree .. and disagree .... having a better noise floor to the antenna favors a 24bit card for picking out week signals .... but most don't live in the sticks...
72170
brettwi2012
Feb 9, 2013 6:32 pm
Yes, I noticed that post, and have been anxiously awaiting the details. -Brett Williams WA6SXU ... http://groups.yahoo.com/group/softrock40/message/71764 ... ...
72171
warrenallgyer
Feb 9, 2013 7:31 pm
Hi Mike I have seen 24 bit cards with a 10 dB or so better noise floor as compared to a 16 bit card. However, I have never seen a situation where the...
72172
Shirley Márquez D...
mdulcey
Feb 9, 2013 7:40 pm
With proper gain distribution the lower noise floor of a good sound card will improve the total dynamic range of your Softrock and thus STRONG signal handling...
72173
Milt Cram
w8nue
Feb 9, 2013 8:15 pm
... Hi Warren et al, I suspect that what you claim is true if you are receiving amplitude modulated signals. However, if you are receiving a digital signal,...
72174
warrenallgyer
Feb 9, 2013 8:36 pm
What you say Shirley is absolutely correct. IF you could reduce the input gain of the radio to the point where the atmospheric noise was only a dB or so above...
72175
warrenallgyer
Feb 9, 2013 8:54 pm
... Hi Milt It is a good question and I have tried to test for this however I have not been able to get my WSPR signal generator output shielded well enough to...
72176
Alan
alanzfq
Feb 9, 2013 10:05 pm
... Subject: Re: [softrock40] Re: USB sound card dongle with stereo INPUT ... The way I understand it is that 24 bits does not give better resolution. But it...
72177
Chris Wilson
chrismwilsonuk
Feb 10, 2013 12:07 am
... 10/02/2013 00:03 For future reference the issue was a damaged cable to the Delta 44 break out box. The connectors are moulded on, and the break is inside ...
72178
Milt Cram
w8nue
Feb 10, 2013 12:24 am
... Hi Alan, My comments inserted below-- ... 24 bits does give better resolution than 16 bits. Most modern A to D converters can digitize a signal whose peak...
72179
warrenallgyer
Feb 10, 2013 2:24 am
Alan On my 15/20/10 build My analog card noise measures -135 dBm and the iMic 16 bit USB card measures -132 dBm (each after S9 calibration). Disconnecting the...
72180
warrenallgyer
Feb 10, 2013 2:44 am
... Milt What SDR apps currently utilize the increased resolution of a 24 bit card to better resolve signal from noise? How would one measure this capability? ...
72181
John Greusel
greusel...
Feb 10, 2013 2:50 am
Chris, Tony has an interface card for the Delta 44 that eliminated the external board and supplies mini plugs instead of the 1/4" ones. I think it may still be...
72182
Alan
alanzfq
Feb 10, 2013 8:21 am
... Subject: [softrock40] Re: USB sound card dongle with stereo INPUT ... Warren, I think it is difficult to compare the performance of two Softrocks in two...
72183
Robert Bajuk
s57aw
Feb 10, 2013 10:05 am
I have for sale: 1) Softrock Ensemble RX II in KM5H enclosure 2) Softrock Ensemble built for 2m 3) Softrock_40_R SDR receiver built for 40m 4) Creative...
72184
MIKE DURKIN
seth_otherpower
Feb 10, 2013 5:43 pm
Thats was part of my point .... if your just using your ears on voice ..... 24bit will probably not help much .... especially if your in a City. the RF dynamic...
72185
n7or
Feb 10, 2013 6:03 pm
The second one arrived Saturday and my case now has a top. Thanks. -N7OR...
72186
Alan
alanzfq
Feb 10, 2013 7:56 pm
... Subject: RE: [softrock40] Re: of soundcards ! ... I think Milt Cram (w8nue) quantified the 24bit desirability well ... but it also depends on what you want...
72187
MIKE DURKIN
seth_otherpower
Feb 10, 2013 8:34 pm
Alan , Ask Milt Cram (w8nue) ... I don't use wspr ... and i cant quantify your RF environment in a fashion to help you. I would assume that you have more...
72188
Dan
tdanro
Feb 10, 2013 10:13 pm
Hi all, A new version of Pocket RXTX Android application which is able to connect to my Softrock SDR receivers in KN34bk over the Internet is now available for...
72189
warrenallgyer
Feb 10, 2013 10:15 pm
Mike The test you are describing is easily done. But it does not accomplish what Alan, and now I, am asking you to do: find a way to prove a 24 bit card does...
72190
Milt Cram
w8nue
Feb 10, 2013 10:48 pm
... Warren, Mike, Alan, et al I will try to dig out the source code for WSPR. It is supposed to be open source. I'm assuming--possibly incorrectly-- that Joe...
72191
warrenallgyer
Feb 10, 2013 11:13 pm
Agreed Milt There is an interesting post here: http://wsprnet.org/drupal/node/890 with comments directly from Joe that shed some light on the subject. Over the...
72192
Ed
n3sdo
Feb 10, 2013 11:39 pm
Hi all I recently built a 80-40m txrx ensemble board. Rx worked well, was able to get it to tx with IQgen, but having to 2nd sound card, I could not tx voice...
