12BY7: Difference between revisions

Revision as of 06:48, 21 September 2023

The 12BY7A (European: EL180) (P/N 154-047,154-0047-00) is a miniature 6.5 W power pentode vacuum tube.

Both the 12BY7 and the slightly improved 12BY7A are all-glass types with a B9A (Noval) miniature 9-pin base and share the EIA 9BF pinout with a number of other miniature pentode tubes of the era.

Aged/Checked/Matched Pair Details
Used in	Tek Part#	S/N Range
531, 533, 535, 536, 541, 543, 545, 555	157-0053-00	?
106	157-0115-00	Note 1

Note 1: Made obsolete soon after the number was allocated.

Reference:

Tube aging procedure / Selection and checking procedure

Data sheets and Links

Used in

the output stage of the 1121
the first stage of the 535, 545A, and 555

Some instruments using part 12BY7

No results

Pictures

RCA/Tektronix 12BY7As
RCA/Tektronix 12BY7As
RCA/Tektronix 12BY7As

@@ Line 1: / Line 1: @@
 {{Vacuum Tube
 |Type=Pentode
-|Number=12BY7
+|Number=12BY7A
-|EuroNumber=
+|EuroNumber=EL180
 |RussianNumber=
-|Part_nos=
+|Part_nos=154-047,154-0047-00
 |Description=miniature 6.5 W power pentode
 |Used_in=106;163;524;531;533;535;536;541;543;535;545;545A;549;555;75;3A75;3B5;
 |Designers=
-}}.  The '''12BY7A''' (154-0047-00), (European equivalent: '''EL180''') is a compatible and slightly improved version.
+}}.
-Both are all-glass types with a {{B9A base}} and share the EIA 9BF pinout with a number of other miniature pentode tubes of the era.
+Both the 12BY7 and the slightly improved 12BY7A are all-glass types with a {{B9A base}} and share the EIA 9BF pinout with a number of other miniature pentode tubes of the era.
 {| class="wikitable"
@@ Line 25: / Line 25: @@
 ==Data sheets and Links==
 [[File:No64.png|right| 9BF socket diagram]]
-* [http://w140.com/12by7a.pdf General Electric 12BY7A Datasheet (PDF)]
+* [[Media:GE 12BY7A data sheet.pdf|General Electric 12BY7A data sheet]]
-* https://en.wikipedia.org/wiki/12BV7
+* [[wikipedia:12BV7|12BV7 @ Wikipedia]]
 * [[tube:12by7|12BY7]] / [[tube:12by7a|12BY7A]] @ radiomuseum.org