2A61: Difference between revisions

2A61 (view source)

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 The front end consists of a differential amplifier.
 Up to serial number 986, the front-end differential amplifier
-used a pair of [[5842]] tubes biased with a tail current of 10mA and a
+used a pair of [[5842]] tubes biased with a tail current of 10 mA and a
-plate-to-cathode voltage of about 100V.
+plate-to-cathode voltage of about 100 V.
 [[File:2a61 frontend.png|thumb|left|upright|[[Nuvistor]]-based front-end amplifier]]
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 and V425 is thermally connected to V525.
 The tail current in the 987-and-up version is about 16 mA
-and the nuvistors have a plate-to-cathode voltage of about 70V.
+and the nuvistors have a plate-to-cathode voltage of about 70 V.
 The second gain stage is a differential amplifier made of a pair of a pair of germanium PNP transistors.
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 D437 and D438 shunt C437, preventing it from ever seeing a voltage
 more than one diode drop.  Most electrolytic capacitors are specified
-to handle reverse voltages of at least 1V without damage.
+to handle reverse voltages of at least 1 V without damage.
 The 2A61 manual's calibration instructions recommend using the Heathkit IG-72
 Audio Generator.
-Suitable connector for 2A61 is  PC06 8-4p / MS3106 8-4p.
+A suitable input connector for the 2A61 is PC06 8-4p / MS3106 8-4p.
 ==Pictures==