At X-band, I tuned to 8300 and 11300 MHz in the AC and BD IFs. The
flux density from Taurus A at 10 GHz is expected to be 520 Jy (nearly
four times Cygnus A). The observed antenna temperature contribution for
Taurus is about 40K -- more than doubling the system temperature.
A remarkable correlation is easily found in the table below:
All the newstyle wideband receivers show PDif compression, typically
of 5%. Some are much worse (ea16 stands out!)
All the oldstyle narrowband receivers show either no compression, or
small PDif *expansion*, typically by 1%. These receivers are marked
with an asterisk (and they have no listings for the 2nd IF).
Antenna A B C D
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1 98 96 98 96
2 no switched power!
3* 101 x 101 x
4 94 96 96 97
5 97 97 97 90
6 96 93 96 98
7 91 92 97 95
8* 98 x 101 x
9* 100 x 100 x
10 in barn
11 96 96 97 97
12* 100 x 101 x
13 99 98 97 93
14 98 97 99 96
15* 101 x 100 x
16 57 90 85 94
17 95 95 95 93
18 96 91 95 92
19 97 98 97 97
20* 101 x 102 x
21 96 94 98 95
22 94 97 96 94
23 98 99 95 96
24 96 89 99 96
25 96 95 99 98
26 96 95 96 94
27* 100 x 102 x
28* 102 x 101 x
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