Dan,

Since no one has answered, I will try.

We make RF products and microphonics (cow bell is the term used here) has
been a problem.  The problem was traced to the VCO.

Let me know if you need more information.  I am not the design engineer,
so my help is limited.

Tenison Stone
Manufacturing Engineer
Telex Communications
1930 West First Street
Blue Earth, MN  56013
507-526-3205   x2164
507-526-3059 (fax)




"Dan R. Johnson" <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
12/05/2002 05:01 PM
Please respond to "TechNet E-Mail Forum."; Please respond to "Dan R.
Johnson"


        To:     [log in to unmask]
        cc:
        Subject:        [TN] A shot in the dark


Maybe someone on Technet knows or knows someone who does know about
microphonics as an error factor in RF circuits. I need to have an outside
source for things like;
-an engineering definition of microphonics as a source of "noise".
-a measurement technique
-an explanation of the physics of microphonics i.e. how motion is required
to generate what degree of noise.

Thanks,
Dan


---------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------