[Test-Equipment] HP 403B pegging meters

[Raymond LaRue]

Has anyone tried installing a Thermometrics CURRENT INRUSH LIMITER in
series with the DC line on a 403B?  This could provide some resistance
at turn on and then as the device warms up the resistance would
decrease.  The 403B doesn't draw much current.  The right combination of
cold-hot resistance might limit that meter jolt.  

It might ba able to work OK in the AC line also?

Ray, W4BYG




-----Original Message-----
From: test-equipment-bounces at mailman.qth.net
[mailto:test-equipment-bounces at mailman.qth.net] On Behalf Of
w8au at sssnet.com
Sent: Monday, March 10, 2008 5:26 PM
To: Test-Equipment at mailman.qth.net
Subject: Re: [Test-Equipment] HP 403B pegging meters

At 03:09 PM 3/10/2008, Mike Czuhajewski wrote:
>----- Original Message -----
>From: "Grant, Ken" <Ken.Grant at uhn.on.ca>
>
> >... The 403B exhibits pinning of the meter ( to the right) when first
>turned on, but settles down after 5 or 10 seconds.
>
>That quirk of the 403B has been mentioned before on at least one other 
>test equipment list. Trust me, they all do that.

Good D'Arsonval meters are supposed to withstand 1000% overload with no
damage.
The turn-on or switching "jolt" that the meter gets should be well under
that.

I've never noticed any problem with the HP meters in any of their test
gear.

FWIW,
Perry  w8au


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