6120Re: [softrock40] Use of DDS-60
- Sep 19, 2006That's a really good package of info to back up Tom's emails. I'll give it a try on the cheaper option as i won't be doing more boards!Thanks, Ian
Cecilio Bayona <KD5NWA@...> wrote:T Hoflich wrote:
> For the first board that I assembled, I went the "chicken"
> method and sent the chip and board to the fellow mentioned
> in the DDS documentation. He did the "hard" work and
> returned it to me. The result was very satisfactory.
> Since then, I have been using the hot air reflow method
> using an embossing gun, coffee warmer and solder that I got
> from Cash Olsen who is on this group. This is very
> satisfactory. I looked at the old entries in this group
> and could not find the step by step documentation that I
> used to do this. Maybe someone can point you to it.
> 73 Tom KM5H
> --- ian mcphedran <gm3gtq@yahoo. co.uk> wrote:
>> Hi Tom, I am trying to build a dds-60 using a 230v
>> Hexacon SMD soldering iron I bought in the U.K. from a
>> supplier of SMD parts who no longer is in business. The
>> tip is o.k. for most smd things but the 28 pin analog
>> devices chip is too closely spaced for it. Can I ask what
>> is the iron you used for your assembly work?
>> Ian Gm3GTQ
>> km5h <km5h@...> wrote:
>> I finally finished a "production" version of a
>> Softrock receiver. By
>> production, I mean everything in one box with proper
>> instead of a bunch of pieces scattered around the bench.
>> In the box
>> is a SR-6, a DDS-60 and a MS-DDS-60 (Controller) .
>> I am using a SoundBlaster MP3+ so I can use it with any
>> computer with
>> USB (especially laptop).
>> The Rocky display looks the same with the DDS-60 or the
>> crystal. The output of the DDS-60 directly replaces the
>> crystal via a
>> short piece of small coax.
>> One of the nice features of the controller is that it
>> displays 7.056
>> but actually puts out 28.224 for the SR-6.
>> You set the center frequency on the controller. Then
>> transfer that
>> number (like 7.056) on the display to the appropriate
>> field in Rocky
>> The DDS-60 goes to 60MHZ so this configuration will work
>> to 15 MHZ.
>> This includes lots of ham bands, short wave bands, and
>> most IF's. Now
>> I need to do some work on switching the band pass filter
>> for higher
>> frequency coverage than the "stock" SR-6.
>> Now, if Rocky only supported AM and maybe FM (hint hint).
>> There have been several questions lately about the use of
>> the DDS60.
>> I have found it very successful.
>> http://www.amqrp. org/kits/ dds60/index. html
>> http://kd1jv. qrpradio. com/msdds60/ msdds60.HTM
>> Tom KM5H
Here is a link to my site with a description on using an oven, but there
is also a link to Cash Olsen's method with an embossing air gun.
< http://www.hpsdr. com/Public/ Projects/ SMT/SMT.html >
www.qrpradio. com www.hpsdr.com
"Sacred Cows make the best Hamburger!" Don Seglio Batuna
All new Yahoo! Mail "The new Interface is stunning in its simplicity and ease of use." - PC Magazine
- << Previous post in topic Next post in topic >>