Hello Time Nuts.
Where I work we had a small run of 15 phase analyzers made in the early
'90 with Efraton FRK just bolted on the 3/16" thick aluminum plate that
was also the left side of the chassis. The plate was around 12" by 12"
with a 1 inch hole for Rb lamp access and we applied a thin
On Wed, 02 Sep 2020 17:49:47 -0400, time-nuts-requ...@lists.febo.com
wrote:
> Send time-nuts mailing list submissions to
> time-nuts@lists.febo.com
> Re: time-nuts Digest, Vol 194, Issue 4
>
> Message: 7
> Date: Wed, 2 Sep 2020 14:31:04 -0700
> From: "Richard (Rick) Karlquist"
> To:
Missing body of my previous message (I hope):
As others have said, there are a number of versions of the 5328A
oscillator support board. Yours looks like it is from a MIL version of
the 5328A with the 10811 OCXO. Attached is the most-likely schematic,
which is from the manual for the
In the NIST paper available at the URL below:
http://pdfs.semanticscholar.org/47ac/742de238c0ece5e91ff7d12c515b9173eb60.pdf
At the beginning of page 2 (4th line) the paper
states:
"Note that the shield permeability is a nonlinear function of the
magnetization and increases to a maximum
I have a WD22UGRC I would like to get hooked up. I want to use a header to
connect to the 8-pin connector on it instead of wire wrapping.
I'd like to find a connector that fits it.
Any thoughts? I'm not experienced enough to know what I measurement I
need, but thought someone here might
On 9/1/2020 10:24 PM, Manfred Bartz wrote:
Hi all,
I bought 2 x 10811 OCXOs for a 10MHz GPSDO project I am working on.
The OCXOs came with an interface board HP 05328-20027, see attached
Manfred, the -hp- system of numbering would indicate that this was from
a 5328 counter. There are two
Manfred wrote:
I bought 2 x 10811 OCXOs for a 10MHz GPSDO project I am working on.
The OCXOs came with an interface board HP 05328-20027, see attached
pictures.
The 05328-20027 "Oscillator Support Assembly" (also, the 05328-60027
"Oscillator Support Assembly") was used to interface an HP
Manfred,
The 05328-20027 part number is the HP part number for the bare PCB used in the
A3 assembly 05328-60027 interface board. You can find the schematic for that
assembly in the manual for the militarized version of the 5328A (AN/USM-459) at
[
Look in the HP5328A counter manual for the circuit - that's what this
came from, indicated by the board marking. Seems like an awful lot of
extra circuitry to support the OCXO. The only thing I can think of
offhand is it may be a PLL circuit to allow locking to an external
reference. You'll
Hello Time-Nuts,
Just wanted to throw in my two cents worth on the rubidium oscillator
heatsink discussion.
My philosophy has always been - keep the rubidium oscillator mounting
surface in the 40-45C range and that is about as good as you can do.
My justification is as follows:
The physics
Hi
That interface board *may* use a biased transistor to convert sine to square.
It’s been a while since I looked at it …..
Bob
> On Sep 2, 2020, at 10:00 AM, Mike Feher wrote:
>
> I remember the days when we had to build our own discrete Schmitt trigger to
> do this. 73 - Mike
>
> Mike B.
Ordered a bunch of these to test against the TAPR device
https://www.aliexpress.com/item/4001231758949.html?spm=a2g0s.9042311.0.0.151
84c4d1hMhZs
TLV3501 Single Chan High Speed Comparator Frequency Meter Front Shaping
Module DC 2.7-5V Frequency Counter SMA
Specifications:
Supply voltage: 2.7-5VDC
I remember the days when we had to build our own discrete Schmitt trigger to
do this. 73 - Mike
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell NJ 07731
848-245-9115
-Original Message-
From: time-nuts On Behalf Of Bruce
Griffiths
Sent: Wednesday, September 2, 2020 1:46 AM
To: Discussion of
Hi
> On Sep 2, 2020, at 1:24 AM, Manfred Bartz wrote:
>
> Hi all,
>
> I bought 2 x 10811 OCXOs for a 10MHz GPSDO project I am working on.
> The OCXOs came with an interface board HP 05328-20027, see attached
> pictures.
>
> Questions:
> 1. Is it worth keeping the interface board?
They make
I have the data for the E10-MRX taken from the 2012 online catalogue.
The case temperature is specified as <45C (after 1 hour, Tamb +25C , no
ventilation).The base plate temperature is rated from -30~+85C Operating
temperature range -20~+50C. Typical figures -30~+65C.
I have never had the
For sine to square wave conversion use LTC6957 (select variant to suit
following logic).
Bruce
> On 02 September 2020 at 17:24 Manfred Bartz mailto:vk3...@gmail.com > wrote:
>
>
> Hi all,
>
> I bought 2 x 10811 OCXOs for a 10MHz GPSDO project I am working on.
> The OCXOs came
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