109: Difference between revisions
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[[File:109 front.jpg|300px|thumb|right]] | |||
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 Ω output connector | It uses a [[Connectors#GR-874|GR-874]] 50 Ω output connector | ||
and has a specified rise time of 250 ps. | and has a specified rise time of 250 ps. | ||
through two GR-874 50 Ω connectors. | The 109's operating principle is that of a | ||
The maximum allowed | [http://en.wikipedia.org/wiki/Pulse_forming_network#Transmission_line_PFNs charged transmission line pulse generator] | ||
with a mechanical reed switch and external 50 Ω transmission line/lines attached through two GR-874 50 Ω connectors. | |||
The length of the external cables determines the impulse width, maximum allowed is 50 ns. | |||
The internal voltage source is adjustable from 0 to 50 V. | The internal voltage source is adjustable from 0 to 50 V. | ||
Using an external voltage source, pulses up to 300 V are possible. | 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]]. | ||
[[mercury switch]]. | The pulse frequency was therefore low (about 600 Hz) and life time was fairly short (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 | ==Repair issues== | ||
full mains and has no protection cover! | |||
Be aware during servicing that the thermal breaker is on full mains and has no protection cover! | |||
==Manuals== | |||
* [http://bama.edebris.com/download/tek/109/tek%20109.v6.pdf Tektronix 109 Manual (PDF)] | * [http://bama.edebris.com/download/tek/109/tek%20109.v6.pdf Tektronix 109 Manual (PDF)] | ||
* [http://w140.com/slac-tn-71-027.pdf Report comparing RG-58 with RG-174 using Tek 109 and Tek 661 (PDF)] | * [http://w140.com/slac-tn-71-027.pdf Report comparing RG-58 with RG-174 using Tek 109 and Tek 661 (PDF)] | ||
==Pictures== | |||
<gallery> | <gallery> | ||
File:109_front.jpg | Front view | |||
File:109_right.jpg | Right internal | |||
File:109_left.jpg | Left internal | |||
File:109_back.jpg | Rear view Connector not original | |||
File: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> | ||
Revision as of 00:33, 13 January 2015
The Tektronix Type 109 is a pulse generator introduced in 1962. It uses a GR-874 50 Ω output connector and has a specified rise time of 250 ps.
The 109's operating principle is that of a charged transmission line pulse generator with a mechanical reed switch and external 50 Ω transmission line/lines attached through two GR-874 50 Ω connectors. The length of the external cables determines the impulse width, maximum allowed is 50 ns.
The internal voltage source is adjustable from 0 to 50 V. 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 mercury switch. The pulse frequency was therefore low (about 600 Hz) and life time was fairly short (200 hours). So, if the operator forgets to shut the 109 down over the weekend and some holidays, the reed switch will need replacement.
Repair issues
Be aware during servicing that the thermal breaker is on full mains and has no protection cover!
Manuals
Pictures
-
Front view
-
Right internal
-
Left internal
-
Rear view Connector not original
-
flying spot caught with 7904, S6, 7T11, 7M11. 2.5 Vpk, Tr=240 ps
-
schematic
