Re: Topband: SDR Mythbusters - ADC Overload myths debunked...

Steve Hicks, N5AC and the VP of Engineering at FlexRadio has posted an excellent explanation and bust of the ADC overload myth on the FlexRadio community. You don’t need to be registered on the community to read this excellent write up:

Re: Topband: SDR Mythbusters - ADC Overload myths debunked...

The opinion expressed in the Flexradio editorial about noise blankers being completely harmless, is not an opinion, it is even false. It really isn't an accurate or factual technical article. It is a sales brochure meant to enforce the love each of us have for a particular system, in this

Re: Topband: SDR Mythbusters - ADC Overload myths debunked...

Hi guys I would like to add my 2 cents on this matter. If you not good, or a very good, RF engineer it is hard to understand what DDU/DUC radio do for you. The most important thing, DDC/DUC radios are not the same just because of the DDC. Number of bits, jitter on the clock works like phase

Topband: ADC Overload

Rick, I hope it's not an issue for me to post here directly. I am posting here because I believe that amateur radio has a huge educational component and ultimately incorrect information services no one. I got started when I was 12 and really knew very little about the hobby. My journey, like

Re: Topband: SDR Mythbusters - ADC Overload myths debunked...

The opinion expressed in the Flexradio editorial about noise blankers being completely harmless, is not an opinion, it is even false. What Flexradio says: ""With a noise blanker, we remove thousands of samples with no negative effects to the signal being monitored and a momentary overload from

Re: Topband: SDR Mythbusters - ADC Overload myths debunked...

I'm not an RF engineer so any "direction" or "stay inside these boundaries, Dood" assistance is appreciated! However, as a Systems Engineer with a background in statistics, I missed the "what?" factor when he mentioned Central Limit TheoremI shoulda put on my "Huh?" hat so I'm almost

Topband: Virtually All Modern Ham Gear is Un-shielded!

On Sun,10/11/2015 6:09 AM, JC wrote: Another issue with DDC radios available nowadays is the lack of shield, they looks like a computer board and that's it, performs like a computer board. No good RF practice to protect the noise floor or common mode noise. Really not ready for field use.

Re: Topband: ADC Overload

I hope it's not, too. :-) SDR fascinates me, and I intend to experiment with the technology on 160 meters starting with a Softrock Xtall Lite 9.0 and the matching switchable BPF. 73, Mike www.w0btu.com On Sun, Oct 11, 2015 at 10:23 AM, Stephen Hicks, N5AC wrote: > > I

Re: Topband: Bandpass filters for receive antennas

Where can I find a schematic for a good high pass filter that rolls off at 1700 kHz? Yesterday, I installed a preamp --that I made over 20 years ago-- right at one of my 2-wire Beverage antennas. Even in the reverse direction (NW) where losses are the greatest, it easily overloads from

Re: Topband: Bandpass filters for receive antennas

Hi Mike, Here is a link to a simple website I created that describes a high pass filter I built earlier this year that rejects both the LW & MW band. It was originally described in a Feb 1978 QST article. I use it in front of an SDR receiver, and really happy with its performance. Don (wd8dsb)

Re: Topband: Bandpass filters for receive antennas

Oops. Forgot to include the link. Here is the link. http://sites.google.com/site/lwmwbandrejectfilter/ 73, Don (wd8dsb) On Sun, Oct 11, 2015 at 9:03 PM, Don Kirk wrote: > Hi Mike, > > > Here is a link to a simple website I created that describes a high pass > filter I built

Re: Topband: Bandpass filters for receive antennas

Hi Mike! I use filters made by Jack Smith at http://www.cliftonlaboratories.com/current_products.htm Great filters ( and expertly pre-tuned ) at a reasonable price - especially so if you purchase just the bare filter board ( w/o enclosure ). 73 Lloyd - N9LB -Original Message- From:

Re: Topband: Bandpass filters for receive antennas

Where can I find a schematic for a good high pass filter that rolls off at 1700 kHz? I can't even have back to back diodes here on Beverages without amplifiers, because the accumulation of hundreds and hundreds of BCB stations sum to more than two volts peak. With a 10dB gain amp, I can

Re: Topband: Bandpass filters for receive antennas

Thanks for all the replies. Tom, I put that preamp at the antenna to hear a specific station on 20 meters to the NW. On 20, I cannot always hear the background noise in the reverse direction. The Beverage is too long for that band (580'), not to mention it's made from electric fence wire. My