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109 (view source)

Revision as of 23:33, 12 January 2015

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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.  
Pulse width can be programmed with a external 50 Ω cable
 
through two GR-874 50 Ω connectors.
The 109's operating principle is that of a
The maximum allowed impulse width is 50 ns.  
[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]]. Frequency and life time was therefore fairly short,
The pulse frequency was therefore low (about 600 Hz) and life time was fairly short (200 hours).
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  
==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>
Image:109_front.jpg  | Front view
File:109_front.jpg  | Front view
Image:109_right.jpg  | Right internal
File:109_right.jpg  | Right internal
Image:109_left.jpg    | Left internal
File:109_left.jpg    | Left internal
Image:109_back.jpg | Rear view Connector not original
File:109_back.jpg | Rear view Connector not original
Image:109_impulse.jpg | flying spot caught with 7904, S6, 7T11, 7M11. 2.5&nbsp;V<sub>pk</sub>, T<sub>r</sub>=240&nbsp;ps
File:109_impulse.jpg | flying spot caught with 7904, S6, 7T11, 7M11. 2.5&nbsp;V<sub>pk</sub>, T<sub>r</sub>=240&nbsp;ps
File:Tek 109 schematic.png | schematic
File:Tek 109 schematic.png | schematic
</gallery>
</gallery>
Retrieved from "https://w140.com/tekwiki/wiki/Special:MobileDiff/14938"

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