B170-V: Difference between revisions

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The '''B170-V''' is a 170 Ω attenuator for the [[517]].  
{{Instrument Sidebar
Switches select from 0dB to 64dB of attenuation.
|manufacturer=Tektronix
|model=B170-V
|class=Attenuator
|series=
|summary=70 Ω attenuator for the [[517]]
|image=Tek b170-v top.jpg
|caption=Tektronix B170-V
|introduced=(?)
|discontinued=(?)
|designers=
|manuals=
* ''please add''
}}
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
The inductors compensate for the switch stray capacitances.   
the stray Cs are connected like that, they constitute a lumped element delay
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
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
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>


==Pictures==
<gallery>
<gallery>
File:Tek b170-v top.jpg
Tek b170-v top.jpg
File:Tek b170-v inside.jpg
B170-V_1.jpg | A (?)
File:Tek b170-v trimmed.jpg|Hand-trimmed resistors
B170-A_2.jpg
File:Tek 517a b170a att.png|Schematic
B170-A_3.jpg
Tek b170-v inside.jpg
Tek b170-v trimmed.jpg|Hand-trimmed resistors
Tek 517a b170a att.png|Schematic
</gallery>
</gallery>


[[Category:Attenuators]]
[[Category:Attenuators]]

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