Hi.
We lost power for several days after the hurricane last weekend. As a
precaution I pulled the AC plug for my 5061B from the UPS it's attached to
since I was pretty sure that we would be without power for a while and didn't
want to have the unit plugged in when the power came back in case
Hi Jeff,
looks like the UPS battery and the 5061B draws too much currenttogether
just charge-up the UPS and when it is OK plug the other unit in
This is my first guess.
Rgds Ernie..
-Original Message-
From: Jeffrey Okamitsu w...@w3kl.com
To: Time Nuts
When you first plug in these, in 'CS OFF', the +3500 VDC power supply comes
on to pump the tube down while the 10811 10 MHz oscillator warms up. Once
the Ion Pump I goes below abut 25 to 30 on the meter, then you can put it in
'LOOP OPEN' which turns on the CS Oven, the -2500 VDC supply and
Joe. Good tips. I'll take a look at these.
Jeff
From: J. L. Trantham jlt...@att.net
To: 'Jeffrey Okamitsu' w...@w3kl.com; 'Discussion of precise time and
frequency measurement' time-nuts@febo.com
Sent: Saturday, September 3, 2011 7:52 AM
Subject: RE: [time-nuts] Buzzing 5061B
When you first
OOPS!!
I forgot about the UPS. I had assumed you had plugged it into the wall.
The UPS certainly is on the list, especially for an 'alarm'.
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Erno Peres
Sent: Saturday, September
Sturdy construction, typical old Fluke. The -B goes up to 1GHZ. I have a -A/AN
(only up to 520Mhz but with deviation meter) and I'm happy with it. Just two
comments, it won't tune finer than 10Hz steps and the 10Mhz reference input
expects TTL levels.
Roberto Barrios
EB4EQA
Message: 3
Jeff from your description it is not clear wether the noise is due to the
UPS or 5061B. The 5061 transformer most likely will complain with a crappy
signal input.I do not trust the output from UPS since many have a crappy
output which is ok if your PC does not have PFC on the input.
I
Another possibility:
The 5061B ovens initially draw too much power for the UPS, charged or not.
Try plugging the standard into the wall until it heats up, then transfer it
to the UPS.
If the standard buzzes when it is plugged into the wall, it is not a problem
in the UPS.
Let it warm up anyway
Hello,
Following a suggestion given to me I am using a 1PPS signal to START the
HP5370.
The STOP is the normal the DUT 10 Mhz.
The pulse comes from a Z3801 rear Db 25 connector.
The counter seems to work ok with this except the level control does not
have a lot of range.
Too far CW and the
All:
It is NOT the UPS. Same problem when the 5061B is connected directly to the AC
Mains.
Jeff
___
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
Quickly pack it and send it to me. Buy 5 eBay rubidiums and send to 5
time-nuts along with a letter with similar instructions. Do that and the
buzzing is guaranteed to be gone. :-)
A fellow in Jordan, Montana had his 5061B buzzing one day, got this chain
letter, disregarded and weeks after his
Jeff
Since its the b I will guess it has the dc CS oven controller.
I speculate you may be hearing one of the inductors singing.
The CS controller can be taken out and the cover removed then reconnected
laying it sort of on the table so that you can more easily hear which one is
singing.
If thats
12 matches
Mail list logo
