Torun Station Report for TOG (2004 March 31)

Personnel Changes
-----------------
None.

Brief Report of Last EVN Sessions
--------------------------------
The November 2003 session was a failure at Tr due to
recorder problem (see below).
In the February 2004 session no problems reported from Tr, 
however correlation of both the NME (C and L band) tapes 
produced no fringes from the second headstack.

Logistics Problems Encountered Since Last TOG Meeting
-----------------------------------------------------
No problems in this category.


Technical Problems Encountered Since Last TOG Meeting
-----------------------------------------------------
Our aged H-maser after the June 2003 failure, recovered
in October and contunues to keep good short term stability
(on a scale of a few days). On longer time scales it however
indicates ubnormal behaviour (reversed aging).

In October 2003, shortly before the session, troubles begun with
the P+G recorder, which seemed to be related to the upper drive
servo mechanism. Despite serious efforts (involving also a help
from JIVE), the recorder could not be repaired until early December.
Then the problem was diagnosed to lie in the Tacho Amp Circuit
within the capstan motor. The circuit gave too weak or missing
output pulses. The repair required dismounting of the capstan
unit and adjusting the amplification of the circuit.

The February session revealed a new problem: recordings done 
with the second headstack give no fringes. Reason is still
unknown.


Changes/Upgrades Made to Hardware/Software
------------------------------------------
Rack number of the Mk4 unit changed in July, 2003 using the kit
provided by Dan Smythe at the Robledo TOG.
A rubidium frequency standard module purchased late 2003.
Current FS version is 9.6.9.
A high throughput fiber link (two lines, 1 Gbit/s each) between
Tr control room and JIVE has been configured. It was first 
tested on February 24 using the FTP protocol.

Any Other Comments
------------------

Mk5 unit has been ordered from Conduant in March 2004.

                                            March 24, 2004

Kaz Borkowski, Genek Pazderski, Greg Hrynek