[Boatanchors] Globe King Panel Meters

[hwhall at compuserve.com]

The paper I mentioned:
http://skywaves.demon.co.uk/technical/Testgear/Meter_Damping_and_Speed_up_Circuits.pdf

 actually places the RC timing across the meter movement instead of in series as I had mentioned. If the damping effect can be satisfactorily obtained, the present volt/current meter calibrating resistors would indeed have to be changed.

 

 Wayne
WB4OGM


-----Original Message-----
From: Dale Parfitt <parinc1 at frontier.com>
To: hwhall <hwhall at compuserve.com>; wrl <wrl at mailman.qth.net>; boatanchors <boatanchors at mailman.qth.net>
Sent: Fri, Apr 29, 2016 6:21 pm
Subject: RE: [Boatanchors] Globe King Panel Meters

There likely is already an appreciable R in series with the meter at least
as a voltmeter. But any change in series resistance would change the meter
reading.

Dale W4OP

-----Original Message-----
From: Boatanchors [mailto:boatanchors-bounces at mailman.qth.net] On Behalf Of
hwhall at compuserve.com
Sent: Friday, April 29, 2016 8:06 PM
To: wrl at mailman.qth.net; boatanchors at mailman.qth.net
Subject: Re: [Boatanchors] Globe King Panel Meters

Wouldn't you want an RC or RL time constant to slow the meter down? For
example, a R in series with the meter and a C across the meter? The R should
limit the speed the C charges & thus what the meter indicates on its rise.
The C is discharged by the meter's internal resistance & that should set the
rate the indication falls. If it falls too fast it may be necessary to have
additional resistance (R2) in series with the C across the meter, which then
interacts with R for the rise time. Might be able to make it sorta work,
though.
 

 Wayne
WB4OGM

 

-----Original Message-----
From: Gary H. Harmon, Jr. <gharmon at idworld.net>
To: 'john fitzsimmons' <w3jn at yahoo.com>; 'WRL' <wrl at mailman.qth.net>;
galaxy-wrl <galaxy-wrl at yahoogroups.com>; 'BOATANCHORS2 LIST'
<boatanchors at mailman.qth.net>
Cc: 'Ron Eisenbrey' <ab5wg at satx.rr.com>
Sent: Fri, Apr 29, 2016 2:28 pm
Subject: Re: [Boatanchors] Globe King Panel Meters

Update from Ron,

Well, capacitor across the meter does not dampen the movement, no matter
what value I try.  It is still a bouncing Betty.
I get about the same results with inductance in series.
Putting a permanent magnet near the meter really affects its response,
unfortunately also the meter accuracy!
The best solution is to get a set of dampened meters like the Triplet 327
series.   I will keep looking, they are common but hard to find.

73,

Gary H. Harmon, Jr. - K5JWK - HAM Radio and ATARI Archaeologist
6003 Archwood
San Antonio, TX 78239-1504
210.657.1549 h / 210.884.6926 c/t
210.657.1549 fax with prior notification gharmon at idworld.net


-----Original Message-----
From: john fitzsimmons [mailto:w3jn at yahoo.com]
Sent: Friday, April 29, 2016 11:30 AM
To: WRL; galaxy-wrl at yahoogroups.com; BOATANCHORS2 LIST; Jr.Gary H. Harmon
Cc: Ron Eisenbrey
Subject: Re: [Boatanchors] Globe KIng Panel Meters

Put a .1 or .5 uF capacitor across them, that will dampen them nicely.



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