[AMRadio] Simpson 260

[David Harmon]

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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