[Amps] B&W 852 Impedance Measurements

[Carl]

Id expect that B&W measured at the frequencies of interest.
I base this upon several visits to the factory in the 80's and seeing the 
lab equipment used.

Carl
KM1H


----- Original Message ----- 
From: "Bob Maser" <bmaser at tampabay.rr.com>
To: "AMPS" <amps at contesting.com>
Sent: Thursday, July 03, 2008 11:42 AM
Subject: [Amps] B&W 852 Impedance Measurements


The B&W 852 that I bought arrived today and is in good condition.  I took
some inductance measurements for each of the band positions and found that
all of them are low as compared to what I thought they should be.

            Original Specs                Actual measurement

10            .95 uH                                   .61 uH
15            1.34                                       .96
20            2.34                                     1.67
40            3.72                                     2.56
80            7.00                                     5.41

My measurements were made on a AADE unit which has always been very
accurate.  The 852 was not mounted on the aluminum chassis, just sitting on
a wooden bench.  I cannot see any signs of alteration, it all looks stock.
In order to use this 852, the Q would be between 15 and 20, very sharp
tuning.  The Original specs correspond to a PLI of 2000 with a Q of ±12.

Any comments would be appreciated.

Bob Maser  W6TR

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