W: Difference between revisions

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{{Plugin Sidebar | ~~designers~~=~~John Horn~~ |

{{Plugin Sidebar

~~manufacturer=Tektronix~~ | type=Type W |

|manufacturer=Tektronix

summary=8-23 MHz differential comparator |

|series=500-series scopes

image=type w front.jpg |

|type=Type W

caption=Type W front view|

|summary=8-23 MHz differential comparator

introduced=1965 |

|image=type w front.jpg

discontinued=1974 |

|caption=Type W front view

~~series=500-series scopes~~|

|introduced=1965

manuals=

|discontinued=1974

|designers=John Horn

|manuals=

* [http://w140.com/mmm/tek-w.pdf Tektronix Type W Manual (37MB, PDF)]

* [[Media:070-432.pdf|Tektronix Type W Manual (11MB, PDF)]]

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}}

The '''Tektronix Type W''' is a differential comparator plug-in amplifier for [[500-series scopes]].

The '''Tektronix Type W''' is a differential comparator plug-in amplifier for [[500-series scopes]], designed by [[John Horn]].

~~Its bandwidth varies from 23 MHz to 8 MHz depending on gain. Type W is~~

~~faster than its [[Z|Type Z]] predecessor~~, ~~and it extends performance in~~

~~terms of sensitivity, reaching 1 mV/div. It achieves 20,000 to 1 common-mode~~

~~rejection at DC and low frequencies. It was~~ designed by [[John Horn]].

Type W is faster (bandwidth 23 MHz to 8 MHz depending on gain) than its [[Z|Type Z]] predecessor, and it extends performance in terms of sensitivity, reaching 1 mV/div.

It achieves 20,000 to 1 common-mode rejection at DC and low frequencies.

==Operation==

Type W has two signal inputs, "A" and "B", and a built in precision variable voltage supply, "V<sub>C</sub>",

which is controlled by a ten-turn pot and can vary from either −1.1 V to +1.1 V or −11 V to +11 V.

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An output of V<sub>C</sub> is provided on the front panel for precision measurements.

Unlike the Type Z, Type W has two gain axes: a decade attenuator and a 1−2−5−10−20−50 selector,

Unlike the Type Z, Type W has two gain axes: a decade attenuator and a 1−2−5−10−20−50 selector, reminiscent of [[D|Type D]] from ten years before.

reminiscent of [[D|Type D]] from ten years before.

Type W is the only letter-series plug-in with an "infinite resistance" input mode selectable at the front panel.

(Types [[1A5]] and [[1A7]] have an internal jumper that can be cut.)

Early production Type W in a [[556]] mainframe won't

Early production Type W in a [[556]] mainframe won't meet spec for overdrive recovery time, because an overdriven W passes enough common-mode to the mainframe vertical amp to saturate it.

meet spec for overdrive recovery time, because an overdriven W

At S/N 3270, this was fixed, by adding another stage to attenuate CM. The new "output amp" circuit board clips onto the rear bulkhead; significant hand mods are required on the chassis.

passes enough common-mode to the mainframe vertical amp to

saturate it. At S/N 3270, this was fixed, by adding another stage to attenuate CM.

The new "output amp" circuit board clips onto the rear bulkhead;

significant hand mods are required on the chassis.

This was also offered as Modification kit 040-0447-00 to retrofit existing instruments.

Type W was created with a pair of type [[8056]] [[Nuvistor|Nuvistors]] in the front end. In 1971 (S/N 7000), following the lead of Type [[1A7]], the Nuvistors were replaced by JFETs to reduce drift. Mod kit 040-0590-00 was offered for existing instruments.

Type W was created with a pair of type [[8056]] [[Nuvistor|Nuvistors]] in the front end. In 1971 (S/N 7000), following the lead of Type [[1A7]], the Nuvistors were replaced by JFETs to reduce drift.

Mod kit 040-0590-00 was offered for existing instruments.

~~In the letter-series timeline of differential comparators, Type W, [[introduced in 1965]],~~

~~follows [[Z|Type Z]] and precedes [[1A5|Type 1A5]]~~.

~~==Specifications==~~

In the letter-series timeline of differential comparators, Type W, [[introduced in 1965]], follows [[Z|Type Z]] and precedes [[1A5|Type 1A5]].

[[~~Category:Specifications needed~~]] ~~''please add''~~

==Pictures==

@@ Line 1: / Line 1: @@
-{{Plugin Sidebar | designers=John Horn |
+{{Plugin Sidebar
-manufacturer=Tektronix | type=Type W |
+|manufacturer=Tektronix
-summary=8-23 MHz differential comparator |
+|series=500-series scopes
-image=type w front.jpg |
+|type=Type W
-caption=Type W front view|
+|summary=8-23 MHz differential comparator
-introduced=1965 |
+|image=type w front.jpg
-discontinued=1974 |
+|caption=Type W front view
-series=500-series scopes|
+|introduced=1965
-manuals=
+|discontinued=1974
+|designers=John Horn
+|manuals=
 * [http://w140.com/mmm/tek-w.pdf Tektronix Type W Manual (37MB, PDF)]
 * [[Media:070-432.pdf|Tektronix Type W Manual (11MB, PDF)]]
@@ Line 18: / Line 20: @@
 <!-- * [[Media:tek_type_w_schem_only.pdf|Tektronix Type W Schematics Only (PDF, OCR)]] -->
 }}
-The '''Tektronix Type W''' is a differential comparator plug-in amplifier for [[500-series scopes]].
+The '''Tektronix Type W''' is a differential comparator plug-in amplifier for [[500-series scopes]], designed by [[John Horn]].
-Its bandwidth varies from 23 MHz to 8 MHz depending on gain.  Type W is
-faster than its [[Z|Type Z]] predecessor, and it extends performance in
-terms of sensitivity, reaching 1 mV/div.  It achieves 20,000 to 1 common-mode
-rejection at DC and low frequencies.  It was designed by [[John Horn]].
+{{MissingSpecs}}
+Type W is faster (bandwidth 23 MHz to 8 MHz depending on gain) than its [[Z|Type Z]] predecessor, and it extends performance in terms of sensitivity, reaching 1 mV/div.
+It achieves 20,000 to 1 common-mode rejection at DC and low frequencies.
+==Operation==
 Type W has two signal inputs, "A" and "B", and a built in precision variable voltage supply, "V<sub>C</sub>",
 which is controlled by a ten-turn pot and can vary from either −1.1 V to +1.1 V or −11 V to +11 V.
@@ Line 31: / Line 35: @@
 An output of V<sub>C</sub> is provided on the front panel for precision measurements.
-Unlike the Type Z, Type W has two gain axes: a decade attenuator and a 1−2−5−10−20−50 selector,
+Unlike the Type Z, Type W has two gain axes: a decade attenuator and a 1−2−5−10−20−50 selector, reminiscent of [[D|Type D]] from ten years before.
-reminiscent of [[D|Type D]] from ten years before.
 Type W is the only letter-series plug-in with an "infinite resistance" input mode selectable at the front panel.
 (Types [[1A5]] and [[1A7]] have an internal jumper that can be cut.)
-Early production Type W in a [[556]] mainframe won't
+Early production Type W in a [[556]] mainframe won't meet spec for overdrive recovery time, because an overdriven W passes enough common-mode to the mainframe vertical amp to saturate it.
-meet spec for overdrive recovery time, because an overdriven W
+At S/N 3270, this was fixed, by adding another stage to attenuate CM. The new "output amp" circuit board clips onto the rear bulkhead; significant hand mods are required on the chassis.
-passes enough common-mode to the mainframe vertical amp to
-saturate it.  At S/N 3270, this was fixed, by adding another stage to attenuate CM.
-The new "output amp" circuit board clips onto the rear bulkhead;
-significant hand mods are required on the chassis.
 This was also offered as Modification kit 040-0447-00 to retrofit existing instruments.
-Type W was created with a pair of type [[8056]] [[Nuvistor|Nuvistors]] in the front end.  In 1971 (S/N 7000), following the lead of Type [[1A7]], the Nuvistors were replaced by JFETs to reduce drift.  Mod kit 040-0590-00 was offered for existing instruments.
+Type W was created with a pair of type [[8056]] [[Nuvistor|Nuvistors]] in the front end.  In 1971 (S/N 7000), following the lead of Type [[1A7]], the Nuvistors were replaced by JFETs to reduce drift.
+Mod kit 040-0590-00 was offered for existing instruments.
-In the letter-series timeline of differential comparators, Type W, [[introduced in 1965]],
-follows [[Z|Type Z]] and precedes [[1A5|Type 1A5]].
-==Specifications==
+In the letter-series timeline of differential comparators, Type W, [[introduced in 1965]], follows [[Z|Type Z]] and precedes [[1A5|Type 1A5]].
-[[Category:Specifications needed]] ''please add''
 ==Pictures==

W: Difference between revisions

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