Message: 1
Date: Thu, 11 Feb 2010 12:42:27 -0500
From: "Bob Camp"
Subject: Re: [time-nuts] Advice on 10 MHz isolation/distribution
amplifier(Clay)
Hi
I really should learn how to read the whole message
Cancel the second request on vibe info.
-
The gotcha with
s@febo.com
Subject: Re: [time-nuts] Advice on 10 MHz isolation/distribution (Clay)
Message: 6
Date: Thu, 11 Feb 2010 12:38:58 -0500
From: "Bob Camp"
Subject: Re: [time-nuts] Advice on 10 MHz isolation/distribution
amplifier(Clay)
Hi
I'll grab the one on the hybrid.
In this ca
Message: 6
Date: Thu, 11 Feb 2010 12:38:58 -0500
From: "Bob Camp"
Subject: Re: [time-nuts] Advice on 10 MHz isolation/distribution
amplifier(Clay)
Hi
I'll grab the one on the hybrid.
In this case hybrid is referring to a construction technique.
The circuit shown was origin
oun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of life speed
Sent: Thursday, February 11, 2010 12:27 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Advice on 10 MHz isolation/distribution
amplifier(Clay)
Message: 2
Date: Thu, 11 Feb 2010 07:54:40 -0500
From: Bob Camp
Hi
Im
oun...@febo.com] On
Behalf Of life speed
Sent: Thursday, February 11, 2010 12:27 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Advice on 10 MHz isolation/distribution
amplifier(Clay)
Message: 2
Date: Thu, 11 Feb 2010 07:54:40 -0500
From: Bob Camp
Hi
Implementing that circuit without using a
Message: 2
Date: Thu, 11 Feb 2010 07:54:40 -0500
From: Bob Camp
Hi
Implementing that circuit without using a hybrid would be a bit of a challenge.
Bob
Message: 6
Date: Fri, 12 Feb 2010 04:09:08 +1300
From: Bruce Griffiths
Yes implementing an exact copy without using a hybrid would be diffic
Yes implementing an exact copy without using a hybrid would be difficult.
However for 10MHz use, its probably not too difficult since that
isolation amplifier is intended for a 100MHz signal and the requirement
is for 10MHz operation.
If the transistor ft's are reduced by a factor of 10 or so
Hi
Implementing that circuit without using a hybrid would be a bit of a challenge.
Bob
On Feb 10, 2010, at 11:30 PM, Bruce Griffiths wrote:
> Clay
>
> Circuit schematic for a more recent JPL isolation amplifier design is
> attached.
>
> Bruce
>
> life speed wrote:
>> Avoiding transformers
Clay
If the first stage has a voltage gain of 2x then the total dc current
can be reduced as the output stages no longer need to drive the feedback
100 ohm resistor connected to ground at RF. The attached circuit
schematic also includes faster input transistors in each 3 transistor
feedback c
Attn: John Ackermann
Not sure what happened to produce 2 identical posts but as far as I can
tell I only posted this once.
Bruce
Bruce Griffiths wrote:
Clay
Circuit schematic for a more recent JPL isolation amplifier design is
attached.
Bruce
Clay
Circuit schematic for one of the JPL isolation amplifiers is attached.
Unfortunately (apart from the few I and others may have) these
transistors are difficult to obtain.
However modern equivalents could be substituted.
Bruce
life speed wrote:
Avoiding transformers and inductors will ma
Clay
You could try something like the attached circuit schematic.
Austron used buffer amplifiers like this albeit without the
complementary symmetry output stage.
There are no transformers and the dc gain is low.
Simulated reverse isolation at 10MHz is around 120dB.
Simulated crosstalk between
n signal at the far end.
Bob
--
From: "life speed"
Sent: Wednesday, February 10, 2010 10:03 PM
To:
Subject: Re: [time-nuts] Advice on 10 MHz isolation/distribution amplifier
Avoiding transformers and inductors will make it virtually impos
Avoiding transformers and inductors will make it virtually impossible to
achieve very low phase noise as the dc gain from say the base of any
transistor in the chain to the output will degrade the flicker phase
noise. Using transformers or using an inductor to shunt any collector
resistors redu
ot;life speed"
Sent: Wednesday, February 10, 2010 8:27 PM
To:
Subject: [time-nuts] Advice on 10 MHz isolation/distribution amplifier
Hello everyone,
I am new to this list, happened across it while searching on distribution
amplifiers.
I need to design a 10 MHz isolation/distribution amplifie
life speed wrote:
Hello everyone,
I am new to this list, happened across it while searching on distribution
amplifiers.
I need to design a 10 MHz isolation/distribution amplifier with two outputs for
a high-vibration wide temperature range environment. I was considering using a
design based
Hello everyone,
I am new to this list, happened across it while searching on distribution
amplifiers.
I need to design a 10 MHz isolation/distribution amplifier with two outputs for
a high-vibration wide temperature range environment. I was considering using a
design based on the NIST article
PS: I think that the availability of logic analyzers in the late 70's may
have affected the adoption of signature analysis.
The real driving force behind signature analysis was the expense of hiring
technicians, who was more engineers, to fix complicated computerized test
equipment. Signature a
doption of signature analysis.
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of swingbyte
Sent: Saturday, August 29, 2009 10:27 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Advice on 5370A vs 5370B d
Magnus Danielson wrote:
swingbyte wrote:
Poul-Henning Kamp wrote:
In message <72c46d68028c463ebdb775ee14fb9...@laptop>, "Roy Phillips"
writes:
Tim
I have recently acquired a 5370B and find your comments of
interest. So in addition, what was the intention of designing the
mother-board to ha
swingbyte wrote:
Hi all,
I have looked through the archives and found that the 5370B has a better
front end and dacs and consolidated the ram and mpu onto one card.
However, can someone tell me how much better? these changes make the
5370B?
It is my understanding that the changes in the B m
At 04:25 AM 8/29/2009, swingbyte wrote...
What effect upon measurements does the new front end have over that
of the 5370A?
The input changes affected the /1 input dynamic and operating ranges.
100 mV - 1.0 V / -2.5 - 1.0 V p-p vs. 100 mV - 4.0 V / -4.0 - 4.0 V
p-p.
Does it mean significan
swingbyte wrote:
Poul-Henning Kamp wrote:
In message <72c46d68028c463ebdb775ee14fb9...@laptop>, "Roy Phillips"
writes:
Tim
I have recently acquired a 5370B and find your comments of interest.
So in addition, what was the intention of designing the mother-board
to have no less than three add
In a message dated 29/08/2009 13:18:16 GMT Daylight Time,
swingb...@exemail.com.au writes:
p.s. Did my original post make the newsgroup, or just one person?
Hi Tim
It made it to the list, just not many answers yet:-)
regards
Nigel
GM8PZR
_
Poul-Henning Kamp wrote:
In message <72c46d68028c463ebdb775ee14fb9...@laptop>, "Roy Phillips" writes:
Tim
I have recently acquired a 5370B and find your comments of interest. So in
addition, what was the intention of designing the mother-board to have no
less than three additional (and in m
In message <72c46d68028c463ebdb775ee14fb9...@laptop>, "Roy Phillips" writes:
>Tim
>I have recently acquired a 5370B and find your comments of interest. So in
>addition, what was the intention of designing the mother-board to have no
>less than three additional (and in my case,unused) pcb slots fo
- Original Message -
From: "swingbyte"
To: "Discussion of precise time and frequency measurement"
Sent: Saturday, August 29, 2009 9:25 AM
Subject: [time-nuts] Advice on 5370A vs 5370B differences please
Hi all,
I have looked through the archives and found that the 5370B has
Hi all,
I have looked through the archives and found that the 5370B has a better
front end and dacs and consolidated the ram and mpu onto one card.
However, can someone tell me how much better? these changes make the
5370B? What effect upon measurements does the new front end have over
that
Thank You John
- Original Message -
From: "J. Forster"
To: "Discussion of precise time and frequency measurement"
Sent: Saturday, July 18, 2009 12:03 PM
Subject: Re: [time-nuts] Advice ? Fluke 207 / 103A + complete manuals
I tried to sell my working 207
I tried to sell my working 207 (but w/o the manual) several years ago. I
could not even get $100 for it at any of several local flea markets.
FWIW,
-John
> Advice ?
> Dave M's question about that manual reminded me of a bunch of this old
> "stuff" I have just occupying space. I have
Advice ?
Dave M's question about that manual reminded me of a bunch of this old
"stuff" I have just occupying space. I have an old Fluke 207 VLF
Receiver/Comparator (I think 207-5) complete with manual/schematics as well
as the Fluke 103A with manual/schematics.
They haven't been hooked up or u
michael taylor wrote:
> I recently acquired a surplus Datum/Efratom LPRO-101 Rubidium
> oscillator, found a PDF manual from Datum and was wondering if anyone
> had any advice or warning on using these oscillators.
>
> I was planning on building a GPS disciplined oscillator using the LPRO
> and the
I recently acquired a surplus Datum/Efratom LPRO-101 Rubidium
oscillator, found a PDF manual from Datum and was wondering if anyone
had any advice or warning on using these oscillators.
I was planning on building a GPS disciplined oscillator using the LPRO
and the 1 PPS out initally from a Trimble
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