Receiver gain noise

Strong 1.8 Hz refrigerator signal, minor 1.54 Hz and large 11.54 Hz

Channel B quiet with no 1.54 Hz and small 11.54 Hz, lack of broadband power in channel B Channel B still well behaved, but growing 11.54 Hz Stomping on ground shows growth of 1.54 Hz and 11.54 Hz modes in Channel A with ~30s decay timescale Somehow channel A became the quiet channel. Channel A lacks 1.54 Hz mode and broadband noise, large 11.54 Hz in both channels Some of the best sensitivity in Channel A, very little 1.54 Hz in B Last good scan of Channel A, best chance at localizing 3c273 if scan speed is fast enough to take advantage of good sensitivity up to 10 Hz. 1.54 Hz and broadband noise now introduced back into Channel A Channel A and B now have similar noise characteristics Channels A and B both show broadband noise. Not likely to see 3c273 due to excess noise in both channels. Broadband noise in both channels Direct tone injection into TP box shows no gain noise Another tone injection in A while stomping around shows no effect Both channels show same performance Refrigerator off test. 1.2 Hz line disappears after refrigerator off. 1.54 and 11.55 lines remain at -30 dB/Hz and -25 dB/Hz 30-60s. Stronger than before however there is walking around to check temperature. Same 1.54 and 11.55 line strength 60-90s even though DC power levels dropping.