ISTR that the programming interface for PLL chips is the three wire serial
form, with a static clock. you _COULD_ drive it with
three switches, but you'd have to at least debounce them -
RS flip-flop from NAND ususally being the simplest way.

Might be interesting to derive a driving circuit from
el-bug principles!

Scott Dorsey wrote in message
...
All of the AD synthesizers I have seen have a microprocessor interface,
where they basically memory-map into a processor. I'd rather have
something
I can directly address.
I could probably pull out a 68HC11 to control the thing if I absolutely
had
to, but I'd rather have something I can just latch a BCD input into.
--scott

Jim Hampton wrote:
Sheesh! 1 GHz with a 10 bit binary counter. Only $350.00 each in quantities
of 1000. Someone care to loan me over 1/3 of a million? Seriously,
however, there are affordable AMD devices but they appear to be in the 50
MHz to under 200 MHz range.

I could do that. Generate a 50-80 Mhz sine wave, then put it into a mixer
with a 50 Hz crystal oscillator and turn it into a DC-30 Mhz signal. I
think I could even get a brickwall high pass at 30 MHz so the whole thing
would be broadband with no tuning.

Of course, you'd lose some stability in the process from those extra
stages, but probably not enough to be a big issue.

Oh, and for 10M FM, of course, I could modulate the local oscillator.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

In article , Dick Carroll wrote:


Leigh wrote:

"citizensband" wrote in
:

All the garbage about how you should even be allowed to operate a CB,
unless you are able to build your own equipment. Real Hams will never
be able to build a rig that even comes close to what's available off
the shelf these days.

.....and a true example of home-built radio was heard on 80m CW a week or
so ago - a Russian with homemade equipment that rasped CW more than broke
the carrier and was a wide signal.

Sort of knocks the 'build your own' case for Gareth into a cocked hat - not
easy to work or even work out who or where he was.

You were probably hearing a keyed parasitic oscillation.

Yup. I am sorry to report that my first homebrew rig did the same thing
too.

Some of the eastern european folks I know are still rockbound, and some of
them are cutting their own crystals. This is a recipe for parasitics, or
at least it was when I tried doing it in high school.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

On 16 Jul 2003 15:27:41 -0700, (Gary) wrote:

thats the classic eastern european sound of homemade gear.

that and the tone that starts high and goes low as the dah dah dah
is sent.

dont worry, you get used to it.

We thought it was the sound of xxxxxxxxxxxxxxxxxxx after the Atlantic crossing.

i do believe that i have ''a convoy''

meg, dipstick and now garry

how quaint.

all i need now is an amstrad 902.

10-4!

Too many eggs in the diet?

On 17 Jul 2003 10:33:21 (Scott Dorsey) wrote:-
Some of the eastern european folks I know are still rockbound,

"Airy R Bean" SPAM@trap wrote in message ...
Too many eggs in the diet?

On 17 Jul 2003 10:33:21 (Scott Dorsey) wrote:-
Some of the eastern european folks I know are still rockbound,



No, that would be egg bound.
--
Jon

"citizensband" wrote in message
...
All the garbage about how you should even be allowed to operate a CB,
unless
you are able to build your own equipment. Real Hams will never be able to
build a rig that even comes close to what's available off the shelf these
days. Most people can't even be bothered, have no interest or don't have
the
time to build rigs anymore. Boatanchors should be used for exactly that,
anchoring boats!

Time to stop whinging, and face the facts...Real Technology has overtaken
you all!

tox


In all honesty, unless go in for VERY low power ( 1Watt), the problem is
that you are going to have real problems ensuring that you don't generate
unacceptable levels of spurious emissions. To properly test things to the
standard required nowadays, with today's high density of electronic
equipment in any residential area, you will need test equipment costing much
more than a brand new 'off the shelf' set.
But it is certainly possible to design your own passive circuits, for
instance filters and traps, without this risk being involved.
If you are interested in DX, then a commercially designed receiver is going
to be much more sensitive and selective, of course. This is due to the fact
that a multinational company has the development resources that an
individual could only dream of.
Obviously, you do gain a lot of respect for designing your own circuits, and
you will attract a lot of interest by doing so! So I don't think that 'home
brew' will ever die out in it's entirety! DN

Kim W5TIT wrote:

hear one of the local Extra class hams doing just that on 10M!!!

Kim W5TIT


Sacrilege!! ;)

--
GO# 40


Yeah. I didn't post this as a joke, either. This guy really used to do it.
And, one of the reasons I can't stand HF operation (other than the biggest
reason being the hiss) is that when we Tech+'s used to get on and do all the
"is this freq in use", etc....all the good operating practices we'd been
told were going to be *absolutes* on ham radio--nearly every time there'd be
some General or higher licensee who'd get on over us and start calling
CQ...or would go just off our freq and begin.

Yep, there were good ones...just as there are good Novices, Techs, and
Tech+'s. But, the bad ones ruin it for everyone.

Kim W5TIT


Well, I don't want to bash 10m as a band but it does seem to attract
some abberant behaviour, and a bit more worldwide than the same that
occurs on 75m and a few selected spots on 20.
Much of the bad behaviour is by CBers faking callsigns - or recent
CB'ers that have become Extras whilst still trying to kick the habit of
being obnoxious.
A shame really, but you are correct in your observations that the bad
ones ruin it for everyone, and if not ruined, it gives everyone else
something to whine about resulting in the appearance that everything is
ruined.
The streets are full of people who **** themselves and fart liberally.
They don't magically disappear when you tune the amateur bands. Thats
what all those tuning knobs are for.

-Bill

--Bill-- wrote:
Kim W5TIT wrote:

hear one of the local Extra class hams doing just that on 10M!!!

Kim W5TIT


Sacrilege!! ;)

--
GO# 40


Yeah. I didn't post this as a joke, either. This guy really used to
do it. And, one of the reasons I can't stand HF operation (other than
the biggest reason being the hiss) is that when we Tech+'s used to get
on and do all the "is this freq in use", etc....all the good operating
practices we'd been told were going to be *absolutes* on ham
radio--nearly every time there'd be some General or higher licensee
who'd get on over us and start calling CQ...or would go just off our
freq and begin.

Yep, there were good ones...just as there are good Novices, Techs, and
Tech+'s. But, the bad ones ruin it for everyone.

Kim W5TIT


Well, I don't want to bash 10m as a band but it does seem to attract
some abberant behaviour, and a bit more worldwide than the same that
occurs on 75m and a few selected spots on 20.
Much of the bad behaviour is by CBers faking callsigns - or recent
CB'ers that have become Extras whilst still trying to kick the habit of
being obnoxious.

I'm sure you have some sort of data to back that claim, or no?

--
GO# 40