Difference between revisions of "B170-V"

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The '''B170-V''' is a 170 Ω attenuator for the [[517]].  
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{{Instrument Sidebar
Switches select from 0 to 64 dB of attenuation.
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|manufacturer=Tektronix
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|model=B170-V
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|class=Attenuator
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|series=
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|summary=70 Ω attenuator for the [[517]]
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|image=Tek b170-v top.jpg
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|caption=Tektronix B170-V
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|introduced=(?)
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|discontinued=(?)
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|designers=
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|manuals=
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* ''please add''
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}}
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The '''B170-V''' is a 170 Ω attenuator for the [[517]]. Switches select from 0 to 64 dB of attenuation.
  
 
[[John Addis]] wrote:
 
[[John Addis]] wrote:
 
<blockquote>
 
<blockquote>
The inductors compensate for the switch stray capacitances.  When the Ls and
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The inductors compensate for the switch stray capacitances.   
the stray Cs are connected like that, they constitute a lumped element delay
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When the Ls and the stray Cs are connected like that, they constitute a lumped element delay line.   
line.  The intent is not to make a delay line, but compensate out all the
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The intent is not to make a delay line, but compensate out all the stray Cs by making a lumped delay line out of it.   
stray Cs by making a lumped delay line out of it.  That extends the
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That extends the bandwidth and makes the impedance 170 ohms (up to 1 GHz or so) rather than a bunch of Cs sitting on the connection from input to output.
bandwidth and makes the impedance 170 ohms (up to 1 GHz or so) rather than a
 
bunch of Cs sitting on the connection from input to output.
 
 
</blockquote>
 
</blockquote>
  
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==Pictures==
 
<gallery>
 
<gallery>
File:Tek b170-v top.jpg
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Tek b170-v top.jpg
File:Tek b170-v inside.jpg
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B170-V_1.jpg | A (?)
File:Tek b170-v trimmed.jpg|Hand-trimmed resistors
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B170-A_2.jpg
File:Tek 517a b170a att.png|Schematic
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B170-A_3.jpg
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Tek b170-v inside.jpg
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Tek b170-v trimmed.jpg|Hand-trimmed resistors
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Tek 517a b170a att.png|Schematic
 
</gallery>
 
</gallery>
  
 
[[Category:Attenuators]]
 
[[Category:Attenuators]]

Latest revision as of 12:21, 18 August 2021

Tektronix B170-V
70 Ω attenuator for the 517
Tektronix B170-V

Produced from (?) to (?)

Manuals
  • please add
(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The B170-V is a 170 Ω attenuator for the 517. Switches select from 0 to 64 dB of attenuation.

John Addis wrote:

The inductors compensate for the switch stray capacitances. When the Ls and the stray Cs are connected like that, they constitute a lumped element delay line. The intent is not to make a delay line, but compensate out all the stray Cs by making a lumped delay line out of it. That extends the bandwidth and makes the impedance 170 ohms (up to 1 GHz or so) rather than a bunch of Cs sitting on the connection from input to output.

Pictures