Mathias,
The AM502, 7A22 for 7000 and 5A22N for 5000 look as if they are the
same differential amp packaged differently.
Many Ebay sellers are unwilling to ship overseas because of the extra
paperwork. If European Tek buyers were to establish a US
transhipment point through this group, the problem could be solved.
--- In TekScopes@y..., "Matthias Urban" <richter_mu@h...> wrote:
I am also a newcomer to the community. I bought my first TEK in
september.
I needed a differential amplifier for triboelectric cable noise
measurements
and an oscilloscope for it.
Budget was tight and the system had to be "portable". Before buying
I did a
quite extensive research about the TM500 series and am now owner of
a TM503
mainframe with an AM502 differential amplifier plug-in and a 10
MHz, 2
channel SC503 oscilloscope plug-in. All the components are in mint
condition
and I am very happy with my choice. I know that many of you would
have
chosen the 7A22 differential amplifier with a 7K mainframe for the
job but
the dimensions and weight of the 7K Series made me desist from that
thought.
The specifications of the AM502 are apparently very similar.
Regarding the price differences you mention, I have compared
prices on
e-bay www.vaxxine.com/phil/scopes/plugin$.htm and several shops and
cannot
share your perception about the TM506. There will always be
bargains but
generally the condition and the demand of a unit determines its
price. I
could be that the demand for the smaller power supply mainframes is
because
people like me need to do a specific job with this equipment rather
than
putting together as many instruments as possible in one frame.
I learned that the TM500 series includes oscilloscope plugins up to
80 MHz
(SC504). For ultimate portability there exists the TM515, a
hardcase power
supply mainframe. Some have high power compartments and forced air
cooling.
Some of the plugins make less sense then others nowadays (i.e.
multimeters,
etc.) unless you really need an all-in-one solution for field work.
Here in Europe it is not easy to find good and cheap plugins for
this series
and I get water in my mouth when I see the e-bay auctions in the
US. Thanks
for any hints. Perhaps the european members or people shipping
overseas can
give good advise?
Another thing: there is the TM5000 series, not to be confused with
the 5000
series oscilloscopes with their plugins. The difference between the
TM500
and TM5000is the GPIB (IEEE 488.1 - 1987) compatibility. TM5000
series
frames accept TM 500 and/or TM5000 series plug-ins.
Matthias Urban
(a german in Spain)
-----Urspr¨¹ngliche Nachricht-----
Von: "Lynn Lewis" <mrzuzu@j...>
An: "TekScopes@yahoogroups. com" <TekScopes@y...>
Gesendet: viernes, 11 de enero de 2002 0:13
Betreff: [TekScopes] 2 dumb questions
I never owned anything made by Tektronix in my life until
December. Now I
have
6 scopes and a bushel of plugins. I have two questions, the
answers to
which
are probably obvious to you guys but not to me.
1. Why are people paying from $120 to over $200 for TM503's and
TM504's
but
are paying less than $100 for TM506's (of which I got one for
$75+S&H)?
2. Will the modules that go into a TM5-whatever also work in a
5000
Series
oscilloscope? If not, then why is the 5000 series so popular? I
can't
figure
any other reason anyone would want a 2MHz or 5MHz scope.
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