[AMRadio] Simpson 260

[Bill Guyger]

Hi All

Meters like the Simpson 260 come in handy especially for voltage when you're not quite sure on what a DVM is telling you because it's dithering up and down between in a random manner because of the rate at which they sample and digitize the parameter under measurement. They almost give you a picture of what you're measuring is actually doing. 

Yes DVM's are very handy, and you don't have to multiply by R times 1 or 10 or whatever or zero the meter before you take a reading. And now days you don't have to even worry about what range you're on. Even a no code tech can do it!!!!

But I've hauled one around for years in addition to my $300+ DVM. They can let you be sure of what you're REALLY seeing in critical situations when a few tenths of a volt matters.

Bill AD5OL 


Sent from my iPhone

> On Jul 25, 2018, at 7:45 PM, David Harmon <k6xyz at sbcglobal.net> wrote:
> 
> I don't know anyone who would want one anyway with all the really cheap,
> accurate DMM available.
> Mebby it is not going to be used....just a vintage lookatem
> piece....dunno...
> 
> 
> 73
> 
> David Harmon
> K6XYZ
> Sperry, OK
> 
> 
> -----Original Message-----
> From: amradio-bounces at mailman.qth.net
> [mailto:amradio-bounces at mailman.qth.net] On Behalf Of Karl Zuk via AMRadio
> Sent: Wednesday, July 25, 2018 5:53 PM
> To: CL in NC <mjcal77 at yahoo.com>; amradio at mailman.qth.net
> Subject: Re: [AMRadio] Simpson 260
> 
> I am confused. 
> 
> You can still buy brand new Simpson 260 meters.
> Am I missing something here?
> Are you talking about very old versions of it?
> 
> Thanks, Karl Zuk  N2KZ
> 
> On Jul 24, 2018, at 7:17 PM, CL in NC via AMRadio <amradio at mailman.qth.net>
> wrote:
> 
> Thanks for the input from several of you.  As I mentioned, it is not the
> electronics of the Simpson meter, the shunts, resistors, etc, this is a
> meter movement issue, and I'm just feeding 250MV directly to the removed
> meter and not getting the required full scale indication.  You can simulate
> this by putting 250MV into the common and 50ua/250MV jack and the range
> switch in any position except ohms, but that has the 200K shunt resistor and
> the 5K series resistor in the circuit and I wanted to eliminate those as an
> issue, so disconnected the whole meter movement.  I did email Simpson and
> they said they hadn't made this meter in 40 years, had no parts,  and no
> longer serviced it.  Got one interesting suggestion that the magnet might
> have weakened over the years, maybe by being near an AC field, but my Eico,
> Conar, Heathkit, Lafayette, and Triplett meters have all been right there
> with it and they still work fine.  Glad to see the 30 volt battery is still
> available for the Triple tt, about $16 bucks, but beats 3 nine volters
> rattling around inside it.
> 
> Charlie
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