In message 5045fb99932bb62b54dea2c4ec301...@sonic.net, Richard Karlquist
writes:
These days, you can buy a decent power detector chip from Analog Devices
(possibly on an evaluation board) and maybe you don't need a power
meter.
I've played with one of those, and if you want to do anything but
There are many detector chip out there. The venerable AD8307 with greater
than 80 db dynamic range goes from almost DC to 700 mhz. Linear Technology
has several currently listed. Their LTC5508 covers 300 to greater than 7
GHz.
Al
On Oct 17, 2013, at 3:38 PM, Richard Karlquist
Hi
The gotcha is that a true thermal converter takes care of a bunch of odd
issues. Other approaches really don't cover all the bases.
How any of this relates to TimeNuts is a bit beyond me ...
Bob
On Oct 18, 2013, at 1:12 PM, Al Wolfe alw.k...@gmail.com wrote:
There are many detector chip
Kenton A. Hoover liked your message with Boxer. On Fri, Oct 18, 2013 at 15:10,
Bob Camp wrote:HiThe gotcha is that a true thermal converter takes care of a
bunch of odd issues. Other approaches really don't cover all the bases.How any
of this relates to TimeNuts is a bit beyond me ...BobOn Oct
.
Thanks;
Thomas Knox
From: saidj...@aol.com
Date: Wed, 16 Oct 2013 15:22:13 -0400
To: time-nuts@febo.com
Subject: Re: [time-nuts] HP 4193A 4815A probe compatibility?
Hi Rick, Tom,
one little bit of knowledge I learned: I like the HP 54701A FET probes
for
frequency-domain stuff
changes when not being used on a O-Scope
as a voltage probe.
Thanks;
Thomas Knox
From: saidj...@aol.com
Date: Wed, 16 Oct 2013 15:22:13 -0400
To: time-nuts@febo.com
Subject: Re: [time-nuts] HP 4193A 4815A probe compatibility?
Hi Rick, Tom,
one little bit of knowledge I learned: I like
changes when not being used on a
O-Scope
as a voltage probe.
Thanks;
Thomas Knox
From: saidj...@aol.com
Date: Wed, 16 Oct 2013 15:22:13 -0400
To: time-nuts@febo.com
Subject: Re: [time-nuts] HP 4193A 4815A probe compatibility?
Hi Rick, Tom,
one little bit
On 2013-10-17 08:34, paul swed wrote:
However homebrewing replacements is of interest.
My experience is with the HP power meters. I have a number of working
units. But darned if the meters no probes or cables show up for a few
dollars at fleas. So last fall I built home brew bolometers. By god
On Oct 17, 2013, at 3:38 PM, Richard Karlquist rich...@karlquist.com wrote:
If you are below 80 MHz, Linear Technologies makes a thermal power meter
on a chip.
Alas, the LT1088 is no longer made.
http://www.linear.com/product/LT1088
Best regards,
-Steve
--
Steve Byan steveb...@me.com
On 10/17/13 4:46 PM, Steve Byan wrote:
On Oct 17, 2013, at 3:38 PM, Richard Karlquist rich...@karlquist.com wrote:
If you are below 80 MHz, Linear Technologies makes a thermal power meter
on a chip.
Alas, the LT1088 is no longer made.
http://www.linear.com/product/LT1088
Rochester
I hope this is not to far off topic. Does any one know if the 4193A and 4815A
probe are physically interchangeable and electronically compatible? If not does
anyone know the differences and how to identify which is which? If you feel
this is to far off topic please contact me directly. Thanks
The 4815A used P channel FETs which were available 50 years ago
and are now unobtainium.
The 4193A used N channel FETs which were available 10 to 30 years
ago and may even be currently available.
They are DEFINITELY NOT INTERCHANGEABLE.
This is according to ex-HP'er George Standford, who used
Hi Rick, Tom,
one little bit of knowledge I learned: I like the HP 54701A FET probes for
frequency-domain stuff.
Available for $300 on Ebay sometimes. I built a small power supply for one
of mine, and use it as a probe for my Spectrum analyzer and scopes. Almost
indestructable.
It
. Thanks Again.
Thomas Knox
Date: Wed, 16 Oct 2013 11:16:27 -0700
From: rich...@karlquist.com
To: time-nuts@febo.com
Subject: Re: [time-nuts] HP 4193A 4815A probe compatibility?
The 4815A used P channel FETs which were available 50 years ago
and are now unobtainium.
The 4193A used N channel
: [time-nuts] HP 4193A 4815A probe compatibility?
Hi Rick, Tom,
one little bit of knowledge I learned: I like the HP 54701A FET probes for
frequency-domain stuff.
Available for $300 on Ebay sometimes. I built a small power supply for one
of mine, and use it as a probe for my Spectrum
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