Dynasonde diary

2019

24 April 2019
First ski tour of inspection. West ant east-half dipole wire broken: fixed ca. 13:50 UT. North ant north half wire broken: fixed 14:02 UT. Lifted up and tied east arm of East ant. Lifted up and tied north end of s (new s) ant. Preamp currents: N: 181.8mA, E: 180.6mA S: 177.7mA W: 180.7mA newE:180.8mA newS: 101.4mA.
15 May 2019
HV, fils off. Dump, Pressure fault between 03:18 and 03:20UT. All on and running from 07:42UT.
04 June 2019
Removed Ailtech #1 mainframe. RF module #5 removed from Ailtech#1 and put in mainframe#2. Still poor noise. Try synth#5 with RF#3. Still poor. Noted that IF module ch2 8dB LED never lights, even in local mode. Removed IF module (#17) and put in spare from Lycksele sounder "5-516". Still poor behaviour.
05 June 2019
Stop sounding ca. 15:49 UT. But PC (DOS) clock is wrong, at 15:50:30 UT it shows 15:37:01 so it is 13 min 29 secs slow. Run stettime.bat at 15:51:24 UT Removed Lycksele ch2 IF module '5-516' and try Lycksele module '4-5 R1'. No better so change IIFA from 8 to 16dB in BP2N.CFG and AGCC to 0 from 1. That is, leave it sounding with fixed attenuation.
07 June 2019
Put repaired IF module (#17) with new attenuators back in R2. Still poor AGC behaviour with high noise level so set AGCC=0 manual to 8+8 dB.

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