This exhibit is marked as No. 1, WY2232 and Unit Thermocouple. It looks to be a bolometer for the measurement of non-sinusoidal RF power. The side arms are probably a resonant dipole at the intended microwave frequency and a very small amount of RF will heat the bead and alter the parameters as read from the base connections via a bridge circuit.The horizontal arms connected to the bead are 37 mm from tip to tip and this equates to a dipole tuned to around 3.3 GHz, a frequency used in centi-metric radar during WWII.![](../pics/abo0112a.jpg)
The working electrodes with the dipole at the right.![](../pics/abo0112b.jpg)
A close-up of the mica sheet holding the electrodes. The central bead is very small and the power it would respond to was minute.![](../pics/abo0112c.jpg)
The central components.The balloon envelope is 64 mm in diameter, and excluding the IO base pins is 143 mm tall.Reference: Observation. |
Updated December29, 2014.
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