[Test-Equipment] Is there an electron tube (nuvistor) amplifiers for Tek 7000-series ?

[Geoff Greer]

The earlier 453 & 454's used nuvistors in the front ends.  Nuvistors also showed up in the triggering circuits.  I think that the early 
scopes also had detachable line cords, where the late 453's & 4 the cords were fixed.

Geoff



11/17/02 04:59:19, "J. Forster" <jfor@quik.com> wrote:

>I would doubt it. The last Tek scopes to use nuvistors were the 561 / 564 series
>as I remember.  How about using a 7A13 Differential Comparator which is designed
>to look at small signals and recover from big overloads gracefully.
>
>-John
>
>*****************
>
>Sakari Mattila wrote:
>
>> There seems to be relatively new nuvistor front-end amplifiers in some
>> Tektronics scopes. I use Tek 7704A scope sometimes in pulse circuits with
>> mostly low-level signal with short high-voltage pulses in between. Haven't yet
>> burned any amplifier, but I would feel safer with nuvistor front-end than
>> FETs.
>
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