re HP 411A

[Chris Ludtke]

   I am not that familar with the 411 A but, may I suggest that it may be a
millivoltmeter or level meter intended for measurement o f MW freqs. The bnc
connector should have a bolometer or mw detector connected to for
measurement. Just an opinion. The 410B has a diode in the probe for
detection. The probe is permenently attached however. The diodes are often
blown by the failure of the ballast tube . 73 es tnx Lorne VE7BOX.

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