[ present & archived diaries ]
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- 1 Jan 1995
Sounder running under Tiger's control.
- 11 Jan
Installed amplifier at PRE to boost 5MHz reference to PRE/Digisonde.
- 17 Jan
Servicing of A300 driver at 12:15 UT
- 18 Jan
08:10 stop sounding to check & fix various things:
- 1 Feb 1995
07:45 UT found HV off after a stormy windy night.
- 3 Feb 1995
- 1 Mar 1995
07:56 UT found HV off. Switched on.
- 20 June 1995
12:52 UT running on A300 only: Fault in HV power supply (?).
- 23 June 1995
After 10:20 UT. All 4 tubes (and other things) replaced. See Stein's notes
of 29 June. No record made of which tubes were taken out or put in.
- 4 Aug 1995
HPTx back in operation. Original tubes back in. The 100kOhm resistor in the
chain which was found broken was replaced by 2x50kOHM resistors.
- 5 Aug 1995
15:25 UT, HV relay switched off while not sounding. Stays on after a few attempts.
- 6 Aug 1995
HPTx on all days, no trips.
- 16 Aug 1995
All 4 valves in HPTx replaced with new ones and balanced:
V3: W9-4557 (top left) V4: W9-4608 (top right)
V1: W9-4561 (bot left) V2: YP-2240 (bot right)
- 18 Dec 1995
Found HV off.
- 22 Dec 1995
18:10 LT, switched sounder off.
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