[Hammarlund] hq 145a tone chirp/blip when tapping on the table. normal?

[D C _Mac_ Macdonald]

Microphonic local oscillator tube?

73 de Mac, K2GKK/5​
Since 30 Nov 1953​
Oklahoma City, OK​
USAF, Retired ('61-'81)​
FAA, Retired ('94-'10)

________________________________
From: hammarlund-bounces at mailman.qth.net <hammarlund-bounces at mailman.qth.net> on behalf of Fernan Bolando <ve4feb at gmx.ca>
Sent: Friday, November 8, 2019 11:23
To: hammarlund at mailman.qth.net <hammarlund at mailman.qth.net>
Subject: [Hammarlund] hq 145a tone chirp/blip when tapping on the table. normal?

Hi all

me again. ive noticed something new :)

when i listen to a steady cw tone/signal and a relatively strong tap on the table
will cause the the tone to chirp or blip. it does not drift though, just a
sudden blip blip thing. i just wanted to know if its normally for the old
tech.

stability seem good after warm up. i can zero beat on a cw tone, just fine.

regards
fernan ve4feb
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