Rick wrote:
Base spreading resistance can be overcome
by using a sufficiently high source impedance
This sounds like the all-too-common noise figure fallacy (increasing
input impedance to get a lower NF). All this does is raise the
source impedance's contribution to the total noise -- it
Regards
Paul.
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
Hi
They may be designed to be as close as you can get to a 50 ohm splitter. The
sum port is where that is most likely to fall apart.
Bob
On Jul 19, 2015, at 10:51 AM, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote:
On 19 July 2015 at 13:39, Bob Camp
I had a plan to construct an off-air frequency 10 MHz standard based on
the 198 kHz from the Droitwich radio 4 transmitter, just by hooking up
various bits of test kit and writing a computer program to control the
equipment via GPIB. No electronics, apart from an antenna, would need to be
built at
Hi David I live a little to the North of you and I have used R4 a number of
years ago...In fact I spotted and reported to NPL breathing or hunting on
the output compared to my two Austron 1250As the period was about 100secs. I
was emailled a couple of months later to say the exciter had
On 7/20/2015 8:12 AM, Charles Steinmetz wrote:
Rick wrote:
Base spreading resistance can be overcome
by using a sufficiently high source impedance
This sounds like the all-too-common noise figure fallacy (increasing
input impedance to get a lower NF). All this does is raise the source
On Sun, 19 Jul 2015 15:49:33 +0100
Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk
wrote:
Does this seem viable, or have I overlooked something? I'm not looking to
build a lab standard - just have a bit of fun.
This should work. At least I don't see a reason why it
The system came up at 9 am and has been working well the austrons and SRS
fs 700 are doing very well. Some static crashes and such.
This test has however revealed something I did not want to know. The HP
z3801 seems to have a problem of jumping phase. So the trusty box is
finally showing its age.
Hi,
I have an HP 3581A and I need to replace the top right hand frequency
pot.
My unit has a dual pot with a concentric shaft.
The only manual I have shows a single pot.
If anyone has a manual that shows the dual pot could you let me know the
values of the pots?
Thanks,
Corby Dawson
If the SRS stores the CALBYTES info in EEPROM, continuously updating it will
wear out the EEPROM in a relatively short time.
There were some proposals about interfacing the freq adjust up/down buttons in
the FEI Rb modules to steer the device... I calculated that the EEPROM would
be
Thanks for your report Paul, What is your QTH?
73,
Bill
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of paul swed
Sent: Monday, July 20, 2015 4:50 PM
To: Time-nuts
Subject: [time-nuts] LORAN on the air 89700 been a good day so far
The system came up
Hi Paul
where could I find the frequency of our Loran [the Californian Loran ]
I have an old HP3586 radio receiver
73
Alex
On 7/20/2015 1:50 PM, paul swed wrote:
The system came up at 9 am and has been working well the austrons and SRS
fs 700 are doing very well. Some static crashes and such.
Hi
Before you *assume* the 3801 is the problem, check and see if the Loran signal
is
hopping around. Who knows what they might be doing on the transmit end ….
Exactly *how* you check the Loran other than finding somebody else on the list
… no idea.
Bob
On Jul 20, 2015, at 4:50 PM, paul
I picked up an HP 8656B from the usual place and have been cleaning it
up... got around to testing the output which looks good on a cheap
frequency counter etc...
I'm wanting to use the 10 MHz output from my TBolt for the reference input
on the HP 8656B and my Elecraft K3. So I started digging
14 matches
Mail list logo
