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Hi Jim, You may not be aware that Bill KD5TDF and I have just tested a home made full duplex USB sound card that sounds very much like what you require. This uses a Wolfson 192k 24 bit A/D converter a

I got the SB Live 24bit external working last night. It only uses USB1.1 so is really straining at 96K/24b. It did sound wonderful however when it was working and there was a tiny little <10db spike

You would expect the third harmonic to be the predominant one with no filtering. You are using the DDS-60 for the OSC on the SR-40, right ? set to receive 1Mhz ? What are you doing to measure the

I see all the discussions on low noise sound cards and wonder if anyone has taken a look at the lower cost cards and found out what they didn't do ? better grounding, better board layout, more

Exactly ! I would much prefer an old tuneable WJ double tuned frontend ....but I don't have one, was going to adapt a Drake 2B preselector ...haven't done that either, and don't really want to plug

I uploaded a component placement chart to the web site to assist the people who bought one of the SR-TR boards and want to build it up. This is --purely experimental--. I have one SR-TR board left if

See: http://www.norcalqrp.org/ncdummyload.htm Dick Patten

On the other hand, I tried SR-40 V4.0 and Rocky with a BPF for 80m, then switched to "direct" (no BPF ahead of T1) and could see no notable difference at various points of the 80m band with the "no

Technical snafu, the card to stay away from is labelled SB Live USB, item #4, it should be SB Live 24 USB, I've wasted so much time on that card, I feel like using it for target practice. But if you

Jim you want to get wired into the VK6APH and KD5TFD development. They have a pair of inexpensive Wolfson chips (very fast A/D) and a small FPGA already hooked to their SDR (See post from Phil VK6APH

Hi Joe, Why exactly do you want the Delta 44 card ? Many of the others (less expensive) are --more-- than adequate for these small entry level SDR projects such as Tony has made available. They

That model number jogged my memory, that is the model that I bought.

Unfortunately cheap sound cards are just that, cheap. I have several SB models and I'm not happy with any of them, below is a list of cards I've tried; SB Live 16 bits, 48KHz, works OK, obsolete SB

I looked again and a traced that even without the BPF/OSC and withot power to the QSD, (I just connect an antenna and the audio to the sound card. I so 2 signals each from the center of the 7.038 Mhz.

OK, good point Art. They --do-- respond to harmonics and I can see how this would be a really serious problem for using it as an LF receiver design. 73 Kees K5BCQ ----- Forwarded Message ----- From:

I spent the morning trying to find a USB2 Linein adapter with no luck. Apparently Creative used to make something called a Audigy2 Nx but it appears they've discontinued it. Just for the heck of it I

Hi Tony, Band kits can be ordered via PayPal at user name raparks@... I am shipping orders typically on the next business day after receiving a PayPal order. Thanks for your interest in the

Tony, I understand that there might be performance issues at 28 MHz but I'm willing to accept the risk. My application is experimental anyway as an IF for VHF/UHF downconverters. Worst case is I have

Thanks for the reply Cecil, I've only noticed one Chaintech card that claimed the 192 Khz sampling it was the AV-710. The lack of information even on their specs is what I'm running into. May have to