O/20

Triode

OA2403

Voltage Stabiliser

OM1

IO	1	2	3	4	5	6	7	8
	ic	h	-	-	a	-	h	k

 
Rectifier HW

Rectifier	Vh	Ah	Va	mAa
	20	0.2	250	75

 
CY31 U281

OA2WA

Voltage Stabiliser

OM10

IO	1	2	3	4	5	6	7	8	tc
	m	h	a	g2,g4	g1(t),g3	a(t)	h	k	g1

 
Triode Hexode

Hexode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.2	250	100	-2	2.7	3.8	0.6M	0.7

 
6K8G ECH35 CV1581 X147 6C31 X61M

OM3

IO	1	2	3	4	5	6	7	8
	m	h	a(2)	k(2)	a(1)	-	h	k(1)

 
Double Diode

Diode	Vh	Ah	Va	mAa
	6.3	0.2	140	0.8

 
ARDD5 CV1054 EB34 VR54

OM4

IO	1	2	3	4	5	6	7	8	tc
	m	h	a	a(d2)	a(d1)	-	h	k	g1

 
Double Diode Triode

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	6.3	0.2	250	-5	5.5	15,000	2.2

 
AR21 CV1055 EBC33 NR48 VR55 DH147 6R7G

OM5

IO	1	2	3	4	5	6	7	8	tc
	m	h	a	g2	g3	nc	h	k	g1

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.2	250	100	-2	3	0.8	2.5M	1.8

 
CV1056 EF36 NR49 VR56

OM525

Magnetron

OM5B

IO	1	2	3	4	5	6	7	8
	m	h	a	g2	g3	nc	h	k

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.2	250	100	-2	3	0.8	2.5M	1.8

 
5A/157D CV0358 EF37A

OM5C

Pentode

OM6

IO	1	2	3	4	5	6	7	8	tc
	m	h	a	g2	g3	-	h	k	g1

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.2	250	250	-2.5	6	1.7	1.5M	2.2

 
ARP34 CV1053 EF39 VR53 W147

OM9

IO	1	2	3	4	5	6	7	8	tc
	-	h	a	g2	-	-	h	k	g1

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	Pout	D
	6.3	0.2	250	250	-18	32	5	70k	2.8	3.6	10%

 
6AG6G CV1052 EL33 KT61 VT52

ORA

Triode

Triode	Vh	Ah	Va	ra	gm
	3.8	0.65	30-90	27,000	0.32

 
 

ORP11

Photocell

ORP90

Photocell

Photocell	Va
	300

 
 

OS75/60

Thyratron

CV0434

OTH231

Thyratron

OTK-4

Triode

OZ4

Rectifier FW

CV0692

OZ4A

Rectifier FW

CV0517