SOUTH BEND STAMPING SITE

IGNITRON AND MERCURY SWITCHES INVENTORY

Label Information	Measurementsa	Number Onsite
Ignitrons
General Electric Ignitron

GL-5551/FG-271

Size B	Length

Diameter

Weight	8 inches

2.5 inches

10 pounds	4
General Electric Ignitron

GL-5552/FC-235A	Length

Diameter

Weight	9 inches

3 inches

11 pounds	1
General Electric Ignitron

GL-5554/FG-259-B	Length

Diameter

Weight	14 inches

4 inches

15 pounds	6
National Electronics (A Varian Division)

Geneva, IL

Ignitron Size B

NL-1051A	Length

Diameter

Weight	9 inches

3 inches

6 pounds	27
National Electronics Inc.

Size C Ignitron NL-1052A

Length

Diameter

Weight	10 inches

4.5 inches

12 pounds	10
Powertronic Inc.

14975 Cleat Street, Plymouth, MI 48170

Ignitron Tube

Size "B" 5551	Length

Diameter

Weight	9 inches

2.5 inches

10 pounds	9
Powertronic Inc.

Ignitron Tube

"C" 5552	Length

Diameter

Weight	10 inches

3 inches

11 pounds	5
Powertronic Inc.

Ignitron Tube

Size 5554	Length

Diameter

Weight	14 inches

4 inches

12 pounds	13
Robotron Ignitron

307R026 NL-1051A

Size B	Length

Diameter

Weight	9 inches

3 inches

9 pounds	1
Robotron Ignitron

307R026 GL-5551A

Size B	Length

Diameter

Weight	9 inches

3 inches

9 pounds	1
Sylvania Electronic Tube

Ignitron 5554 Size 679	Length

Diameter

Weight	14.5 inches

4 inches

14 pounds	1
Weltronic Ignitron

210-0149 GL-5551-A

Size B	Length

Diameter

Weight	9 inches

2.5 inches

6 pounds	3
Weltronic Ignitron

210-0149 NL-1051A

Size B	Length

Diameter

Weight	9 inches

2.5 inches

6 pounds	8
Weltronic Ignitron

210-0147 NL-1052A	Length

Diameter

Weight	10 inches

4.5 inches

12 pounds	5
Weltronic Ignitron

210-0152 GL-5553B

Size D	Length

Diameter

Weight	16 inches

5.5 inches

24 pounds	2
Westinghouse Ignitron / Reliatron Tube

Size B

WL-5551-A/652	Length

Diameter

Weight	9 inches

2.5 inches

10 pounds	18
Westinghouse Electronic Tube

Ignitron Size B

WL1051A	Length

Diameter

Weight	10 inches

2.5 inches

10 pounds	2
Westinghouse Electronic Tube

Ignitron WL 5552A/651

Size C	Length

Diameter

Weight	12 inches

3 inches

10 pounds	5
Unknown (no label)	Length

Diameter

Weight	7 inches

3 inches

10 pounds	3
Broken (label information unknown)	NA	9
Total Ignitrons	133
Switches
Mercoid 9-51SM

(yellow top on one end)	Length

Diameter

Weight	2 inches

0.5 inches

<1 pound	12
Mercoid 9-A64SA

(yellow top on both ends)	Length

Diameter

Weight	3 inches

0.5 inches

<1 pound	2
Green tops

Length

Diameter

Weight	3 inches

0.5 inches

<1 pound	13
Total Switches	27
Total Ignitrons and Switches	160
Notes

a	Weight is total ignitron weight, not weight of mercury in ignitron or switch