On Tue, 24 Feb 2004 22:39:26 GMT, "W3JDR" wrote:
FYI, I have bought two of the DDS Daughter boards from

http://www.njqrp.org/

and used a standard Weller soldering iron to build it, with the
exception of the SM DDS chip, installed by KitBuilders.. email



Excellent results, both from KitBuilders and the finished product.
For $19 for the kit and $6 for installing the chip I now have a 1Hz
resolution signal source..

Thanks George ( njqrp ) and Mike ( wa6ouw )

my apologies, I appear to have cut the text from W3JDR in its
totality. What I ascribed to Joe was in fact all my own work ;-(
sorry Joe..
On Tue, 24 Feb 2004 23:47:11 GMT, (Mike W)
wrote:

On Tue, 24 Feb 2004 22:39:26 GMT, "W3JDR" wrote:
FYI, I have bought two of the DDS Daughter boards from

http://www.njqrp.org/

and used a standard Weller soldering iron to build it, with the
exception of the SM DDS chip, installed by KitBuilders.. email



Excellent results, both from KitBuilders and the finished product.
For $19 for the kit and $6 for installing the chip I now have a 1Hz
resolution signal source..

Thanks George ( njqrp ) and Mike ( wa6ouw )

my apologies, I appear to have cut the text from W3JDR in its
totality. What I ascribed to Joe was in fact all my own work ;-(
sorry Joe..
On Tue, 24 Feb 2004 23:47:11 GMT, (Mike W)
wrote:

On Tue, 24 Feb 2004 22:39:26 GMT, "W3JDR" wrote:
FYI, I have bought two of the DDS Daughter boards from

http://www.njqrp.org/

and used a standard Weller soldering iron to build it, with the
exception of the SM DDS chip, installed by KitBuilders.. email



Excellent results, both from KitBuilders and the finished product.
For $19 for the kit and $6 for installing the chip I now have a 1Hz
resolution signal source..

Thanks George ( njqrp ) and Mike ( wa6ouw )

Tim Wescott wrote:

In the case of RF devices like DDS's and high-performance
microprocessors (you think 1GHz isn't RF?) the surface mount package
significantly enhances performance.

Re-mounting an SMD onto a DIP header guarantees minimum ground-lead
lengths of about a quarter-inch, so watch out for some "interesting"
changes in performance.

I haven't found them to be that bad to work with; you just need good
eyes and a steady hand.

I don't have notably good eyes or hand co-ordination, but have done
plenty of SMD work using an extra pair of strong reading glasses (on top
of my normal pair) and a Weller TCP iron with the finest-pointed conical
tip.

It's remarkable how your hands become much steadier and more controlable
when viewed under magnification. The other thing is to rest your elbow
or forearm on the bench, so you only have to move your wrist and hand.
Oh yes, and lay off the coffee and Coke for several hours beforehand!

Given those aids, anyone who doesn't have a clinical condition affecting
hand co-ordination should give SMD a try. (Note: "I don't want to" is
not a clinical condition :-)

Other essentials:
* a good work light
* thin silver-loaded solder (20g maximum)
* a flux pen or a supply of liquid flux
* thin fluxed desolder braid (1/8in maximum)
* a good pair of tweezers, that won't cross over and flip the SMD to
who-knows-where
* a clean workspace, because you *will* drop things

With only that equipment, I've mounted AD DDS chips (and much else) on a
board and they worked first time.


SMD work *is* do-able... so just do it!


--
73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB)

http://www.ifwtech.co.uk/g3sek

Tim Wescott wrote:

In the case of RF devices like DDS's and high-performance
microprocessors (you think 1GHz isn't RF?) the surface mount package
significantly enhances performance.

Re-mounting an SMD onto a DIP header guarantees minimum ground-lead
lengths of about a quarter-inch, so watch out for some "interesting"
changes in performance.

I haven't found them to be that bad to work with; you just need good
eyes and a steady hand.

I don't have notably good eyes or hand co-ordination, but have done
plenty of SMD work using an extra pair of strong reading glasses (on top
of my normal pair) and a Weller TCP iron with the finest-pointed conical
tip.

It's remarkable how your hands become much steadier and more controlable
when viewed under magnification. The other thing is to rest your elbow
or forearm on the bench, so you only have to move your wrist and hand.
Oh yes, and lay off the coffee and Coke for several hours beforehand!

Given those aids, anyone who doesn't have a clinical condition affecting
hand co-ordination should give SMD a try. (Note: "I don't want to" is
not a clinical condition :-)

Other essentials:
* a good work light
* thin silver-loaded solder (20g maximum)
* a flux pen or a supply of liquid flux
* thin fluxed desolder braid (1/8in maximum)
* a good pair of tweezers, that won't cross over and flip the SMD to
who-knows-where
* a clean workspace, because you *will* drop things

With only that equipment, I've mounted AD DDS chips (and much else) on a
board and they worked first time.


SMD work *is* do-able... so just do it!


--
73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB)

http://www.ifwtech.co.uk/g3sek

Thanks to all for the replys. Thanks particularly to Joe and Mike W. for
the good info.on the daughterboard and soldering service.

--
Chip
KC5UES
real e-mail address:






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Thanks to all for the replys. Thanks particularly to Joe and Mike W. for
the good info.on the daughterboard and soldering service.

--
Chip
KC5UES
real e-mail address:






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"Ian White, G3SEK" wrote in
:

Even with an 'essential tremor' in my soldering arm
I manage down to 0.7mm pitch SMD's.
Indeed, magnificatrion does the job!

Sam

Tim Wescott wrote:

In the case of RF devices like DDS's and high-performance
microprocessors (you think 1GHz isn't RF?) the surface mount package
significantly enhances performance.

Re-mounting an SMD onto a DIP header guarantees minimum ground-lead
lengths of about a quarter-inch, so watch out for some "interesting"
changes in performance.

I haven't found them to be that bad to work with; you just need good
eyes and a steady hand.

I don't have notably good eyes or hand co-ordination, but have done
plenty of SMD work using an extra pair of strong reading glasses (on top
of my normal pair) and a Weller TCP iron with the finest-pointed conical
tip.

It's remarkable how your hands become much steadier and more controlable
when viewed under magnification. The other thing is to rest your elbow
or forearm on the bench, so you only have to move your wrist and hand.
Oh yes, and lay off the coffee and Coke for several hours beforehand!

Given those aids, anyone who doesn't have a clinical condition affecting
hand co-ordination should give SMD a try. (Note: "I don't want to" is
not a clinical condition :-)

Other essentials:
* a good work light
* thin silver-loaded solder (20g maximum)
* a flux pen or a supply of liquid flux
* thin fluxed desolder braid (1/8in maximum)
* a good pair of tweezers, that won't cross over and flip the SMD to
who-knows-where
* a clean workspace, because you *will* drop things

With only that equipment, I've mounted AD DDS chips (and much else) on a
board and they worked first time.


SMD work *is* do-able... so just do it!

"Ian White, G3SEK" wrote in
:

Even with an 'essential tremor' in my soldering arm
I manage down to 0.7mm pitch SMD's.
Indeed, magnificatrion does the job!

Sam

Tim Wescott wrote:

In the case of RF devices like DDS's and high-performance
microprocessors (you think 1GHz isn't RF?) the surface mount package
significantly enhances performance.

Re-mounting an SMD onto a DIP header guarantees minimum ground-lead
lengths of about a quarter-inch, so watch out for some "interesting"
changes in performance.

I haven't found them to be that bad to work with; you just need good
eyes and a steady hand.

I don't have notably good eyes or hand co-ordination, but have done
plenty of SMD work using an extra pair of strong reading glasses (on top
of my normal pair) and a Weller TCP iron with the finest-pointed conical
tip.

It's remarkable how your hands become much steadier and more controlable
when viewed under magnification. The other thing is to rest your elbow
or forearm on the bench, so you only have to move your wrist and hand.
Oh yes, and lay off the coffee and Coke for several hours beforehand!

Given those aids, anyone who doesn't have a clinical condition affecting
hand co-ordination should give SMD a try. (Note: "I don't want to" is
not a clinical condition :-)

Other essentials:
* a good work light
* thin silver-loaded solder (20g maximum)
* a flux pen or a supply of liquid flux
* thin fluxed desolder braid (1/8in maximum)
* a good pair of tweezers, that won't cross over and flip the SMD to
who-knows-where
* a clean workspace, because you *will* drop things

With only that equipment, I've mounted AD DDS chips (and much else) on a
board and they worked first time.


SMD work *is* do-able... so just do it!

I'm new to the newsgroup and am sure that this is not the first gripe
about
SMD's, but I refuse to use them - not because I can't (at least not yet),
but because I don't want to endure the angst.
===================================
The above proves that a basic bottleneck in humans is the tendency to
resist change.
Fortunately there are also many (humans) who see change as a challenge.
I prefer to belong to the latter category and will shortly 'get into SMD' by
building a DDS VFO
(ref KG6CYN) ,be it that I am currently doing some 'home training' by
messing about with SMD components from discarded consumer electronics.
After all homebrewing electronics is and remains a great hobby.

Frank GM0CSZ / KN6WH