My 5065A has one of those tick-monsters in it. You can hear the damn thing
two states away (three at night). Luckily it powers up disabled, but once you
enable it you can't stop it. I've only enabled it once... that was enough...
lesson learned.
> I hear they are quite
Hi Jim,
Maybe a version of this?:
http://leapsecond.com/history/Benchmark.htm
The audible (1 kc) whine was probably from the model 113 or 115. See if any of
the following pages remind you:
http://leapsecond.com/hpclocks/
http://www.radiomuseum.org/r/hewlett_pa_frequency_divider_and_cl.html
htt
On Sun, Jun 11, 2017 at 9:01 PM, paul swed wrote:
> But perhaps whats magical gold is the Patek Phillipe clock movement. Just a
> guess.I hear they are quite annoying clunkers actually. I have never owned
> one but a fellow in Europe was telling me you can really here them tick.
>
In my first jo
Hi Greg,
> Leap Second has a series of photos.
> http://www.leapsecond.com/museum/au1210/
That would be me. There are quite a few versions of the Austron 1210 Crystal
Oscillator, at least models A through D, as I tried to show on that page. I
have a few and they are handy instruments, with a vi
On 6/11/17 6:37 PM, Bob kb8tq wrote:
Hi
The new age drill on anything unusual on eBay seems to be to start it out at
$10,000 and lower it 5% every six months.
Eventually you will hit the “right” price. Apparently it is much easier to do
this than to actually research the item you have.
I’ve al
Hi
The new age drill on anything unusual on eBay seems to be to start it out at
$10,000 and lower it 5% every six months.
Eventually you will hit the “right” price. Apparently it is much easier to do
this than to actually research the item you have.
I’ve always wondered how these guys deal wit
Greg
Ebay can always be sort of silly. ah for the old days when a rusty piece of
stuff might go for a reasonable $.
But perhaps whats magical gold is the Patek Phillipe clock movement. Just a
guess.I hear they are quite annoying clunkers actually. I have never owned
one but a fellow in Europe was t
BTTF : Back to the Future "moment"
Austron was a company based in Austin, TX that manufactured crystal clocks for
military and industry in late 1970s. Leap Second has a series of photos.
http://www.leapsecond.com/museum/au1210/
Austron 1210-D Manual (digital model)
Product produces 1 MHz and 5
Hi
> On Jun 11, 2017, at 2:21 PM, Chris Albertson
> wrote:
>
> On Sun, Jun 11, 2017 at 9:28 AM, Attila Kinali wrote:
>
>> Hi,
>>
>
>
>>
>> You are asking a lot of question regarding control systems.
>> But, there are no easy answers there. Especially if you want
>> to build it cheap. The
Hi
I certainly saw the “positive gain at this setting” going to “negative gain at
that setting” result on a lot
of OCXO designs. I never had the patience (or a stable enough system) to get
into the millions
or even 100K’s on a single oven. As a practical result, a gain of -500 is not
really
On Sun, 11 Jun 2017 11:21:15 -0700
Chris Albertson wrote:
> This has been my opinion for a LONG time. It is easy to come up with good
> solutions if to just throw money at the problem.So you see here people
> proposing just going top of the line all across but an engineer earns his
> money
>
On Sun, Jun 11, 2017 at 9:28 AM, Attila Kinali wrote:
> Hi,
>
>
> You are asking a lot of question regarding control systems.
> But, there are no easy answers there. Especially if you want
> to build it cheap. The cheaper you want to be the more you
> need to know and understand the problem.
>
On 6/11/2017 6:09 AM, Magnus Danielson wrote:
Hi,
What papers would you recommend reading?
One of the things that we experimented on and improved was the passive
wall to prohibit quick cooling of oven. A puff of air or the forced
convection (fans) needed for other electronics would tie the
On 6/11/2017 8:59 AM, Attila Kinali wrote:
The exact insulation is relatively unimportant.
We even tried still air using a knife edge
cradle. Didn't make much difference.
What is a knife edge cradle?
We wanted to test still air as insulation.
We couldn't just replace the insulation with
Hi,
On Sat, 10 Jun 2017 13:10:39 -0700
Chris Albertson wrote:
> How many output bits are required? Most uPs have quite a few digital
> output pins. Each pin could drive a heater resister. Values of the
> resisters organized by power of two. Again note the title (poor mans...)
> resisters c
On Thu, 8 Jun 2017 16:17:20 -0700
"Richard (Rick) Karlquist" wrote:
> We were stuck under 1,000 for a long time
> using only face heaters. I still remember the
> day that I rigged up the first crude rim header
> by winding a piece of magnet wire around the rim
> and holding it in place with 5 mi
Hi
A great starting point is Rick’s paper on the Hockey Puck.
Bob
> On Jun 11, 2017, at 9:09 AM, Magnus Danielson
> wrote:
>
> Hi,
>
> What papers would you recommend reading?
>
> One of the things that we experimented on and improved was the passive wall
> to prohibit quick cooling of ov
Hi,
What papers would you recommend reading?
One of the things that we experimented on and improved was the passive
wall to prohibit quick cooling of oven. A puff of air or the forced
convection (fans) needed for other electronics would tie the metal
shield very well to surrounding environmen
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