开云体育

Bob I think your link to the PCrotor vb6 program may be broke.I was unable to download it!

Use gnumeric. It is 100% compatible with MS Excel. -- Ramakrishnan - VU3RDD

That's exactly how I'm looking at it. For the normal tube superhets I'm used to, I'd be looking for the most narrow, lowest noise, highest "Q" frontend I could get my hands on ...and it would

The QSD detector doesn't stop detecting at other frequencies besides the Quadrature clock, it can receive at multiples and sub-multiples it's up to the filter to keep them out. So if it's too broad

True a simple quad hybrid to generate the 2 lo signals 90 degrees apart. Most mil receivers limit the bfo range plus and minus 8 KHz so that would be the limit of IF intot he sound card. Tony Parks

With the SoftRock performance I see here using the "pretty broad" stock 6.5Mhz - 12Mhz Bandpass filter on the SR-40, I wonder how an even broader BPF filter would do ...say 3Mhz - 16Mhz, or 1.8 - 30

I have wondered about using the BFO output of an existing receiver as the oscillator source with a v5.0 SoftRock used in IF applications. Tony KB9YIG

There are a couple gotcha's that i know about related to Open Office. Unless things have changed very recently, it won't handle Microsoft Excel macros. Also, and somewhat less obvious, if your

I highly recommend Open Office! I haven't found anything that it wont do (yet). My wife works with spreadsheets daily at her workplace with the latest M$ fully registered version. She tried OO at

Hidehiko, I'm very much interested in this problem. I am planning on putting my softrock on LF and have noted that many simple filters only attenuate out of band signals by 50 to 60 db. Obviously,

A issue to consider is spurs in the center of the pass-band, you would want to not have the center of the band at 455KHz but either 12KHz lower or higher. In that way you can have a 455 IF with +-

Hello The program needs an LPT port and very few of the USB to printer cabled appear as LPT port in windows device manager. YMMV. 73 de Joe

Hidehiko, I have used this DDS VFO on my laptop which runs the W98SE O/S. I assume that if you have the drivers installed for the USB to Parallel port, it should work OK. I have considered adding a

Hi All, It would be cool to have an interface directly off a 455 KHz IF so sdr demodulation could be interfaced with the typical analog receiver. wa1gfz

I need to isolate the softrock 40 from the mixer. I use 30mtrs as the IF and notice some spurs from multiples of the IF mixing with harmonics of the DDS LO. The softrock has quite a bit of leakage ar

My oops. Thanks Ted. I'm doing the same thing here with an sr40 and a sp-600, making an SDB - 'software defined boatanchor'. Larry n2ted wrote:

Hi Larry, Thank you for the reply. I do agree whith you in case of a SoftRock-40 kit. In this instance, the oscillator signal is divided by 2 twice so the xtal should be 4*10.7Mhz. Unfortunately, I

Bob, Nice inforamtion to me! Thanks and I will try to operate your softare with DDS-60 card this weekend. I have some questions as follows; 1) Do I have to use this program with Windows Xp?

Tony, Good job! I'd also like to order a one Partial kit. How do I have to pay via payal with the shipping cost to Japan? Regards. Hidehiko Komachi JA9MAT

I have updated my DDS VFO program that appeared in Issue #5 of the 'AmQRP Homebrewer' magazine. Version 2.0 now works with AmQRP's AD9851 DDS board, as well as their AD9850 DDS board. In addition,