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The Tektronix Type 109 is a pulse generator [[introduced in 1962]]. | The '''Tektronix Type 109''' is a pulse generator [[introduced in 1962]]. | ||
It uses a [[Connectors#GR-874|GR-874]] 50 | It uses a [[Connectors#GR-874|GR-874]] 50 Ω output connector | ||
and has a specified rise time of | and has a specified rise time of 250 ps. | ||
Pulse width can be programmed with a external 50 | Pulse width can be programmed with a external 50 Ω cable | ||
through two GR-874 50 | through two GR-874 50 Ω connectors. | ||
The maximum allowed impulse width is | The maximum allowed impulse width is 50 ns. | ||
The internal voltage source is adjustable from | The internal voltage source is adjustable from 0 to 50 V. | ||
Using an external voltage source, pulses up to | Using an external voltage source, pulses up to 300 V are possible. | ||
The special feature of the 109 is that the switching action is made directly by a | The special feature of the 109 is that the switching action is made directly by a | ||
[[mercury switch]]. Frequency and life time was therefore fairly short, | [[mercury switch]]. Frequency and life time was therefore fairly short, | ||
about | about 600 Hz and 200 hours. | ||
So, if the operator forgets to shut the 109 down over the weekend and | So, if the operator forgets to shut the 109 down over the weekend and | ||
some holidays, the reed switch will need replacement. | some holidays, the reed switch will need replacement. | ||
Be aware during servicing, the thermal breaker is on | Be aware during servicing, the thermal breaker is on | ||
full mains and has no protection cover! | full mains and has no protection cover! | ||
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<gallery> | <gallery> | ||
Image:109_front.jpg|Front view | Image:109_front.jpg | Front view | ||
Image:109_right.jpg|Right internal | Image:109_right.jpg | Right internal | ||
Image:109_left.jpg|Left internal | Image:109_left.jpg | Left internal | ||
Image:109_back.jpg|Rear view Connector not original | Image:109_back.jpg | Rear view Connector not original | ||
Image:109_impulse.jpg|flying spot caught with 7904, S6, 7T11, 7M11. 2. | Image:109_impulse.jpg | flying spot caught with 7904, S6, 7T11, 7M11. 2.5 V<sub>pk</sub>, T<sub>r</sub>=240 ps | ||
File:Tek 109 schematic.png|schematic | File:Tek 109 schematic.png | schematic | ||
</gallery> | </gallery> | ||
[[Category:Pulse generators]] | [[Category:Pulse generators]] | ||