800 MHz Gregorian Dome Receiver Log

as of Monday, 18-Dec-2017 16:28:40 AST

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NameEmailDateComment
phil phil@naic.edu 06/12/2009 installed new feed, filters before dewar. Dewar is still room temperature.
phil phil@naic.edu 06/15/2009 replaced cables feed to dewar with good cables. Installed filters after the dewar. Retuned dipoles.
phil phil@naic.edu 06/29/2009 installed cooled receiver.
danadwhitlow@naic.edu07/03/2009late 02july or early 03jul09: New (lower loss) CAL couplers were installed between feed and mini-dewar input. I believe the couplers were installed between the large filters and the dewar.
crvThursday, August 20, 2009 15:15:45fuse was blowned and the reciever warmed on the night of tuesday the fuse was replaced and the reciever cooldown was restarted.Reciever is cold.
crvTuesday, December 22, 2009 15:17:12Penn state feed Antenna has been replaced by a BYU feed antenna that will be tested for a couple of days. This antenna has only two of the four dipole connected(3,4). These dipoles are connected to Ch A.
crvcrios@nai.eduWednesday, February 24, 2010 16:56:13The system is warm since Feb.10th 2010.
crios Friday, April 30, 2010 17:31:55On April 23rd the power cord of cryo pump was replaced and started the cooldown.
crvcrios@naic.eduWednesday, June 2, 2010 10:44:40The system was turned off on May 27th,2010. The system will be lowered on the week to make space for the BYU proyect.
crvcrios@naic.eduMonday, September 27, 2010 13:36:43The system was installed and started cooling on friday sep. 27 2010 and is ready for testing.
crvMonday, September 27, 2010 17:01:20System feed array is BYU 1st desing.
crvcrios@naic.eduThursday, October 28, 2010 13:14:23The reciever is not available for use since yesterday due to problem with the dewar cryo pump and power supply.
crvcrios@naic.eduFriday, November 5, 2010 10:56:53The dewar was lowered to the shop to be repaired.
crvcrios@naic.eduWednesday, November 17, 2010 14:37:35The system has been repaired and is under test by Dana and is schedule to be installed tomorrow.
crvcrios@naic.eduThursday, November 18, 2010 14:04:36The system was installed today and started cooldown and its 77.8K now.
GRgrivera@naic.eduMonday, November 29, 2010 13:08:32The coldhead fuse was blown yesterday (Sunday, Nov. 28). The fuse was replaced and it was left cooling.
crvcrios@naic.eduFriday, January 14, 2011 16:21:13System started cooldown at 10:00am.
crvMonday, February 14, 2011 14:16:38The reciever was turned off .because it warmed up do to a fualt on the vac. pump. The dewar has a new vac. pump connected and will be pumpping over night.
criosWednesday, May 25, 2011 15:33:15The cryo temp. was 140K Denis and I found that the vac. pump was off this happened after several power dips. The dewar is cooling down now and the vac. was .6microns.
Denis Urbaindurbain@naic.eduWednesday, April 3, 2013 13:26:20The receiver was dismantled and will be removed from the rotary floor. We need the space for the upcoming AO19 Rx test, plus the Rx has not been requested for a long time.


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