[time-nuts] HP 3586A/B/C entirely referenced to 10MHz: A solution II

[paul swed]

Just soldered another ad5329 to a sot adapter board.
The suggested method of tinning the board.
Place the chip and solder 1 pin then adjust it to align all pins
Lastly heating each pin on the chip worked very well. Just a tap of the iron
did the trick. No solder bridges and no un-soldered pins as occurred in my
first attempt. Time maybe 15 minutes. Did a lot of double checking.
Regards
Paul
WB8TSL

On Fri, Apr 1, 2011 at 9:32 AM, paul swed <paulswedb at gmail.com> wrote:

> Good comments.
> But here is the reality. I find soldering smt stuff difficult. But do-able.
> I do not have microscopes etc. Tools, 25 watt iron with to big of a tip and
> to large of a solder diameter.
> Did create nasty solder bridges that I figured out a trick. Simply heat the
> two legs and take a steel straight pin and run between the legs. Clears the
> bridge nicely. But Bert and others suggested a different approach that I
> will try tonight.
>
> Writing the program is the easier part ( Bert's done it already). There has
> to be several versions. HP built 5-7 different 3586s series that are really
> internally different and no magical way for the software to know what box
> its in. After that it truly is a small number of wires. By the way in the C
> code Bert has all of the frequency combinations for the different models.
> Again no way to sense what box its in. Nope I do not really know C, but I
> can read.
>
> But the real secret of all of this is collaboration. Bert and I both
> contributed to the design, troubleshooting etc. I learned a heck of a lot
> from Bert in the process. Thats what its about for me at least, sharing
> learning and trying to apply.
>
> Sorry to say I can't get into the kit/board building business.
> Regards
> Paul
> WB8TSL
>
>
> On Fri, Apr 1, 2011 at 12:48 AM, WB6BNQ <wb6bnq at cox.net> wrote:
>
>> Perrier,
>>
>> Your simple idea is a non workable concept.  Instead of whining about the
>> complexity, why not contact Bert or Paul Swed and see if one of them would
>> do you a favor and build the item for you.  I do not believe the hookup part
>> is that hard to do and if You follow instructions well it should be quite
>> doable.
>>
>> Bill....WBBNQ
>>
>> Perry Sandeen wrote:
>>
>> > Fellow Listers,
>> >
>> > Please read and think a bit about my comments before rushing to the
>> reply button.  The comments are meant to be technical.
>> >
>> > When Burt VE2ZAZ posted his HP 3586A/B/C entirely referenced to 10MHz: A
>> solution, I was drooling with envy to add it to my units.  However, after
>> reading what it took to make and program it I was completely deflated.
>> >
>> > While there are those on the list with extensive educational and
>> technical resources, Burt’s project may be just fine.  And for those who
>> can make it, go for it.  I made a pros and cons list.
>> >
>> > Advantages                       Dis-advantages
>> > Small- Will fit inside case      SMD Components
>> > Low power requirements           Needs Programming
>> > Inexpensive                      Program varies for various models
>> > Awesome build quality            Almost comes up with the correct
>> numbers
>> >
>> > Sometimes the only way to solve a problem is with SMD’s, programmed
>> devices etc.  But I suspect that for most of us “solutions† of this type
>> are really impractical.  Some posts seem to suggest that everyone can
>> program devices, write code, and can work with SMD’s as easily as getting
>> a hamburger at Micky D’s.  It just ain’t so.  On my level I have to use
>> the KISS principle.
>> >
>> > Several alternative methods:
>> >
>> > The cheap method.  Turn the crystals 90 degrees so they are
>> perpendicular to the PC board.  Make a simple TL431 temperature regulated
>> circuit (I found it on the web by a google search) with a bit of copper and
>> insulation.  A small supplemental adjustable tuning capacitor and/or varicap
>> circuit may be needed.  It will probably get one as close as the original
>> programmed mod IMHO.
>> >
>> > The high priced exact solution.  Use a HP 3336 locked to the same
>> external standard one is using for the HP 3586B.  Remove the original
>> crystal circuit and inject the exact number one needs and get the exact
>> results without any dithering.
>> >
>> > I’m blessed to have almost all the test equipment, or its equivalents,
>> mentioned on this list sans a spectrum analyzer and from post’s that I
>> have read I’m way ahead of many of the members.
>> >
>> > I’ve been very impressed, and have learned a great deal, with the
>> posts on the T’bolts, answers to my posted qurstions, WWVB, and HP
>> oscillator fine tuning tips to name a few.
>> >
>> > On subjects over, or in many cases way over, my head I just read and
>> delete but others find them both fascinating and useful and that’s just
>> fine.
>> >
>> > Regards,
>> >
>> > Perrier
>> >
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