[Hallicrafters] Revolutionary Signal Generator

[George KB2Z]

Ross,
It sounds like a solid foundation for what Rob is proposing.
0-30MHz would fill half of the qualifications. How much effort
would be involved getting the if passband sweep? The kit from the 
earlier post was a bit pricey in Australian dollars.
George KB2Z




Ross Stenberg wrote:
> Rob, It can be controlled with free software that uses three lines of a
> computer parallel port or from a separate PIC device available as a kit.
> 
> 	Ross K9COX 
> 
> -----Original Message-----
> From: Rob Copeland [mailto:rob at v6spider.com] 
> Sent: Thursday, May 25, 2006 11:11 AM
> To: Ross Stenberg; Hallicrafters at mailman.qth.net
> Subject: RE: [Hallicrafters] Revolutionary Signal Generator
> 
> This is what I am talking about! :)
> 
> It would be great if you could connect this thing via USB to a pc. And
> control it from software. It would be perfect.
> 
> Rob
> 
> -----Original Message-----
> From: hallicrafters-bounces at mailman.qth.net
> [mailto:hallicrafters-bounces at mailman.qth.net]On Behalf Of Ross Stenberg
> Sent: Thursday, May 25, 2006 8:33 AM
> To: Hallicrafters at mailman.qth.net
> Subject: RE: [Hallicrafters] Revolutionary Signal Generator
> 
> 
> This is not perfect, just an example.
> 
> 	73 Ross K9COX
> 
>     "Some three years ago we introduced the original DDS Daughtercard
> (www.njqrp.org/dds) to the QRP community, providing a low cost and modular
> way to add a precisely-adjustable 0-30 MHz signal generator to one's
> project. All you had to do was add an AD9850 DDS chip (available as a free
> sample from the good people at Analog Devices) and +12V, and then any number
> of popular microcontrollers could control the DDS Daughtercard to have it
> serve as a rock-solid VFO.  Over 1,000 of these little cards were sold!
> 
>     Well, there is still a demand for this inexpensive little kit and an
> ever-growing list of uses for it so we updated the basic design and are now
> ready to provide the new_and_improved  DDS-60 daughtercard. This
> self-contained functional module generates a good-quality RF signal from
> 1-60 MHz by using a small pc board to contain just the bare DDS essentials -
> an Analog Devices AD9851 DDS chip, a clock oscillator, a 5th-order elliptic
> filter and an adjustable-level RF amplifier.  Additionally, an onboard 5V
> regulator is provided so you only need provide a battery or power supply
> ranging anywhere from 8-16V DC. The three digital control lines, the power
> supply, and the output signal are all available on a pin header at the board
> edge, and the DDS-60 is pin-compatible with the original DDS Daughtercard.
> The schematic is shown below on this page. Kit price is $28"
> 
> http://www.amqrp.org/kits/dds60/index.html
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