Home > Electronic Tubes > Ken Rad

Ken Rad

February 13th, 2009 admin

How do you test old radio valves to see if they work ?

I have a set of old radio 'ken-rad' valves from my uncle. I want to sell them on eBay but I dont know if they work. Is there a way I can test them ?

I haven't designed a tube circuit for 30 years!

There used to be tube testers in all the drug stores, but not any more.

Perhaps if you are lucky you can find one somewhere that you can use, perhaps a good electronic parts store.

Lacking that, all you can do is check the heater for continuity, as an open heater is the most common failure mode. Get the datasheet for the tubes, and find out what pins are the heater (filament) and see if you measure a low resistance there. 1-100 ohms area.

.

1 GE Ken Rad 6SL7 GT Silver Plates Vintage Preamp Tubes Vacuum
1 GE Ken Rad 6SL7 GT Silver Plates Vintage Preamp Tubes Vacuum
$12.99
Time Remaining: 3h 18m
Buy It Now for only: $12.99

Ken Rad 53 Audio Radio Tube Black Glass Round Black Plates EngBase Tests NOS
Ken Rad 53 Audio Radio Tube Black Glass Round Black Plates EngBase Tests NOS
$27.99
Time Remaining: 7h 51m
Buy It Now for only: $27.99

2x 5Y3WGTA 5Y3GT KEN RAD NOS MATCHED Tube Valve Valvola Rhre Valvula Lampe TSF
2x 5Y3WGTA 5Y3GT KEN RAD NOS MATCHED Tube Valve Valvola Rhre Valvula Lampe TSF
$149.99
Time Remaining: 8h 54m
Buy It Now for only: $149.99

LOT OF 3 ANTIQUE TYPE 32 VACUUM TUBES RCA  KEN RAD
LOT OF 3 ANTIQUE TYPE 32 VACUUM TUBES RCA KEN RAD
$4.99
Time Remaining: 10h 6m

Lot of 2 Raytheon Televisoin TV Tubes Electon Tube RCA Ken Rad 6J5 6SA7
Lot of 2 Raytheon Televisoin TV Tubes Electon Tube RCA Ken Rad 6J5 6SA7
$7.75
Time Remaining: 10h 13m
Buy It Now for only: $7.75

PAIR OF TYPE 42 ST SHAPE VACUUM TUBES KEN RAD  SYLVANIA
PAIR OF TYPE 42 ST SHAPE VACUUM TUBES KEN RAD SYLVANIA
$4.99 (1 Bid)
Time Remaining: 10h 23m

Single Ken RAD VT 109 Vacuum Tube NIB
Single Ken RAD VT 109 Vacuum Tube NIB
$0.99
Time Remaining: 10h 54m

Pair of KEN RAD 6AC7 VT 112 NIB Vacuum Tubes
Pair of KEN RAD 6AC7 VT 112 NIB Vacuum Tubes
$0.99
Time Remaining: 10h 54m

NOS Ken Rad USA 6SQ7GT Black Plate BTM D Foil Get Metal Base Vacuum Tube 100+
NOS Ken Rad USA 6SQ7GT Black Plate BTM D Foil Get Metal Base Vacuum Tube 100+
$5.95
Time Remaining: 11h 49m
Buy It Now for only: $5.95

NOS Ken Rad USA 6SQ7GT Black Plate BTM D Foil Get Vacuum Tube 100+
NOS Ken Rad USA 6SQ7GT Black Plate BTM D Foil Get Vacuum Tube 100+
$5.95
Time Remaining: 11h 53m
Buy It Now for only: $5.95

NOS Ken Rad USA VT 229 6SL7GT Black Plate BTM D Foil Get Vacuum Tube 100+
NOS Ken Rad USA VT 229 6SL7GT Black Plate BTM D Foil Get Vacuum Tube 100+
$19.95
Time Remaining: 11h 53m
Buy It Now for only: $19.95

Ken Rad USA JAN CKR 6SL7GT VT 229 Silver Plate BTM D Foil Get Vacuum Tube 85
Ken Rad USA JAN CKR 6SL7GT VT 229 Silver Plate BTM D Foil Get Vacuum Tube 85
$14.95
Time Remaining: 11h 59m
Buy It Now for only: $14.95

Ken Rad USA JAN CKR 6SL7GT VT 229 Gray Plate BTM D Foil Get Vacuum Tube 92
Ken Rad USA JAN CKR 6SL7GT VT 229 Gray Plate BTM D Foil Get Vacuum Tube 92
$17.95
Time Remaining: 12h 8m
Buy It Now for only: $17.95

Ken Rad USA VT 66 6F6 Vacuum Tube 93
Ken Rad USA VT 66 6F6 Vacuum Tube 93
$17.95
Time Remaining: 13h 24m
Buy It Now for only: $17.95

4 Pcs NOS Ken Rad GE 6H6 Vacuum Tubes NIB
4 Pcs NOS Ken Rad GE 6H6 Vacuum Tubes NIB
$24.99
Time Remaining: 13h 27m
Buy It Now for only: $24.99

2 Pcs Ken Rad GE Type 34 Audio Radio Vacuum Tubes Tested
2 Pcs Ken Rad GE Type 34 Audio Radio Vacuum Tubes Tested
$24.99
Time Remaining: 13h 27m
Buy It Now for only: $24.99

NOS Ken Rad USA 6F6G Black Plate Bottom D Foil Get Smoked Glass Vacuum Tube
NOS Ken Rad USA 6F6G Black Plate Bottom D Foil Get Smoked Glass Vacuum Tube
$19.95
Time Remaining: 13h 36m
Buy It Now for only: $19.95

NOS Ken Rad USA VT 66 6F6 Vacuum Tube 100+
NOS Ken Rad USA VT 66 6F6 Vacuum Tube 100+
$19.95
Time Remaining: 13h 37m
Buy It Now for only: $19.95

NOS Ken Rad USA 6G6 G VT 198 A Silver Plate Get Smoked Glass Vacuum Tube 100+
NOS Ken Rad USA 6G6 G VT 198 A Silver Plate Get Smoked Glass Vacuum Tube 100+
$6.95
Time Remaining: 13h 38m
Buy It Now for only: $6.95

One 1940s Ken Rad VT 137 1626 tube
One 1940s Ken Rad VT 137 1626 tube
$11.45
Time Remaining: 13h 39m
Buy It Now for only: $11.45

NOS Ken Rad USA 6G6G Black Plate Get Smoked Glass Vacuum Tube 100+
NOS Ken Rad USA 6G6G Black Plate Get Smoked Glass Vacuum Tube 100+
$4.95
Time Remaining: 13h 46m
Buy It Now for only: $4.95

NOS Ken Rad USA 6F6 Vacuum Tube 100+
NOS Ken Rad USA 6F6 Vacuum Tube 100+
$9.95
Time Remaining: 13h 51m
Buy It Now for only: $9.95

Ken Rad USA JAN CKR 6F7 VT 70 Mesh Plate Bottom  Get Vacuum Tube 91 94
Ken Rad USA JAN CKR 6F7 VT 70 Mesh Plate Bottom Get Vacuum Tube 91 94
$6.95
Time Remaining: 14h 8m
Buy It Now for only: $6.95

5 Vintage Vacuum Radio Tubes Tested Raytheon NU Ken Rad GE Syl 5Y3GT
5 Vintage Vacuum Radio Tubes Tested Raytheon NU Ken Rad GE Syl 5Y3GT
$66.49
Time Remaining: 15h 2m
Buy It Now for only: $66.49

One 1940s Ken Rad U S Navy CKR 38233 1642 2C21 Twin Triode tube
One 1940s Ken Rad U S Navy CKR 38233 1642 2C21 Twin Triode tube
$15.50
Time Remaining: 15h 18m
Buy It Now for only: $15.50

KENRAD GE CBS HYTRON 6X5GT NOS NIB SINGLE OR PAIR
KENRAD GE CBS HYTRON 6X5GT NOS NIB SINGLE OR PAIR
$12.95
Time Remaining: 16h 54m
Buy It Now for only: $12.95

RCA KENRAD 6SH7 NOS NIB SINGLE
RCA KENRAD 6SH7 NOS NIB SINGLE
$5.95
Time Remaining: 16h 54m
Buy It Now for only: $5.95

Vintage Twins Pair of KEN RAD  57 Pentode RF IF Vacuum Tubes Tested Nice
Vintage Twins Pair of KEN RAD 57 Pentode RF IF Vacuum Tubes Tested Nice
$25.00
Time Remaining: 18h 53m
Buy It Now for only: $25.00

Radio Tubes 33 Ken Rad Test 1800
Radio Tubes 33 Ken Rad Test 1800
$9.74
Time Remaining: 19h 18m
Buy It Now for only: $9.74

NOS Ken Rad USA Type  77 Mesh Plate BTM D Foil Get Vacuum Tube 100+
NOS Ken Rad USA Type 77 Mesh Plate BTM D Foil Get Vacuum Tube 100+
$14.95
Time Remaining: 20h 35m
Buy It Now for only: $14.95

6L7 Ken Rad NOS
6L7 Ken Rad NOS
$5.00
Time Remaining: 21h 29m
Buy It Now for only: $5.00

Pair Ken Rad JAN 6V6 Power Pentode Military Tubes
Pair Ken Rad JAN 6V6 Power Pentode Military Tubes
$14.95
Time Remaining: 1d 8h 28m

VACUUM TUBE KEN RAD 6K6 GT 6 TESTED STRONG
VACUUM TUBE KEN RAD 6K6 GT 6 TESTED STRONG
$7.50
Time Remaining: 1d 8h 52m

6L6G KENRAD NOS RADIO AMP VACUUM TUBE RHRE VALVOLA VALVE Lampe TSF
6L6G KENRAD NOS RADIO AMP VACUUM TUBE RHRE VALVOLA VALVE Lampe TSF
$69.00
Time Remaining: 1d 9h 35m
Buy It Now for only: $69.00

Ken Rad VT 231 tubes Pair 6SN7GT Tested Excellent
Ken Rad VT 231 tubes Pair 6SN7GT Tested Excellent
$89.00
Time Remaining: 1d 11h 48m
Buy It Now for only: $89.00

VINTAGE KEN RAD FULL WAVE RECTIFIER JAN CKR 80 VT 80 VACUUM TUBE
VINTAGE KEN RAD FULL WAVE RECTIFIER JAN CKR 80 VT 80 VACUUM TUBE
$9.99
Time Remaining: 1d 11h 53m

1 Ken Rad Type 43 Tube Tested  100 Audio Amp Radio
1 Ken Rad Type 43 Tube Tested 100 Audio Amp Radio
$9.99
Time Remaining: 1d 12h 19m
Buy It Now for only: $9.99

NOS Ken Rad JAN 6B4G Tube Flat BLACK MONO PLATES HarpGetter
NOS Ken Rad JAN 6B4G Tube Flat BLACK MONO PLATES HarpGetter
$59.95
Time Remaining: 1d 12h 27m
Buy It Now for only: $59.95

MINT1944 Ken Rad JAN CKR 6L7 MATCHED SET PAIR Vintage Amp Ham Radio Tube NOS NIB
MINT1944 Ken Rad JAN CKR 6L7 MATCHED SET PAIR Vintage Amp Ham Radio Tube NOS NIB
$11.88
Time Remaining: 1d 12h 55m
Buy It Now for only: $11.88

 NOS NIB PAIR OF KEN RAD 6SK7 TUBES TESTED
NOS NIB PAIR OF KEN RAD 6SK7 TUBES TESTED
$25.00
Time Remaining: 1d 12h 59m
Buy It Now for only: $25.00

6B8 G KEN RAD RADIO TUBE
6B8 G KEN RAD RADIO TUBE
$0.99
Time Remaining: 1d 13h 9m

6T7 G KEN RAD RADIO TUBE
6T7 G KEN RAD RADIO TUBE
$0.99
Time Remaining: 1d 13h 9m

JAN CKR 12SG7 KEN RAD VT 209 METAL RADIO TUBE
JAN CKR 12SG7 KEN RAD VT 209 METAL RADIO TUBE
$0.99
Time Remaining: 1d 13h 9m

Vintage Stereo Vacuum Radio Tube Tested Ken Rad Type 78
Vintage Stereo Vacuum Radio Tube Tested Ken Rad Type 78
$16.99
Time Remaining: 1d 15h 39m
Buy It Now for only: $16.99

Radio Tubes 89 Ken Rad NOS
Radio Tubes 89 Ken Rad NOS
$14.24
Time Remaining: 1d 15h 41m
Buy It Now for only: $14.24

Radio Tubes 9003 VT 203 Ken Rad NOS
Radio Tubes 9003 VT 203 Ken Rad NOS
$8.99
Time Remaining: 1d 15h 42m
Buy It Now for only: $8.99

Vintage Electronic Tube 6A3 Arcturus 1 Hytron 1 TungSol 1 KenRad 1
Vintage Electronic Tube 6A3 Arcturus 1 Hytron 1 TungSol 1 KenRad 1
$29.99 (1 Bid)
Time Remaining: 1d 16h 35m

Radio Tubes 7193 Ken Rad NOS NT
Radio Tubes 7193 Ken Rad NOS NT
$11.24
Time Remaining: 1d 16h 55m
Buy It Now for only: $11.24

Radio Tubes 12SR7 Ken Rad JAN CKR NOS
Radio Tubes 12SR7 Ken Rad JAN CKR NOS
$10.49
Time Remaining: 1d 17h 9m
Buy It Now for only: $10.49

Ken Rad type 27 tube tested 100 foil getter engraved base
Ken Rad type 27 tube tested 100 foil getter engraved base
$16.99
Time Remaining: 1d 17h 12m
Buy It Now for only: $16.99

Lot 13 Ken Rad sylvania kenstate raytheon cunningham RCA victor tung sol tubes
Lot 13 Ken Rad sylvania kenstate raytheon cunningham RCA victor tung sol tubes
$10.00
Time Remaining: 1d 17h 26m

Lot of 4 12SK7 vacuum tubesAA5 radiotested 80+GERCAKen Rad JAN CKR+
Lot of 4 12SK7 vacuum tubesAA5 radiotested 80+GERCAKen Rad JAN CKR+
$9.99
Time Remaining: 1d 17h 32m
Buy It Now for only: $16.95

VINTAGE KEN RAD 45Z3 NOS VACUUM TUBE TESTED STRONG RADIO HAM AUDIO AMPLIFIER
VINTAGE KEN RAD 45Z3 NOS VACUUM TUBE TESTED STRONG RADIO HAM AUDIO AMPLIFIER
$5.99
Time Remaining: 1d 17h 34m
Buy It Now for only: $5.99

Pair Ken Rad 6J5 Vacume Tube used test very good metal
Pair Ken Rad 6J5 Vacume Tube used test very good metal
$10.00
Time Remaining: 1d 17h 52m

1 VINTAGE KEN RAD 6C5 VACUUM TUBE TESTED STRONG AUDIO RADIO
1 VINTAGE KEN RAD 6C5 VACUUM TUBE TESTED STRONG AUDIO RADIO
$7.99
Time Remaining: 1d 19h 13m
Buy It Now for only: $7.99

Radio Tubes 19 19GT Ken Rad Test 1200 1150
Radio Tubes 19 19GT Ken Rad Test 1200 1150
$8.99
Time Remaining: 1d 19h 33m
Buy It Now for only: $8.99

Vtg KEN RAD GE 25Z6GT Rectifier Doubler Tube BEAUTIFUL TESTED TUBE
Vtg KEN RAD GE 25Z6GT Rectifier Doubler Tube BEAUTIFUL TESTED TUBE
$10.50
Time Remaining: 1d 20h 7m
Buy It Now for only: $14.50

4 TUBES 2 VT 231 KenRad  2 12AT7WA Gold Brand Sylvania Sq getter 6SN7GT
4 TUBES 2 VT 231 KenRad 2 12AT7WA Gold Brand Sylvania Sq getter 6SN7GT
$207.49
Time Remaining: 2d 2h 8m
Buy It Now for only: $207.49

Vacuum Tube KEN RAD Type 12SA7 Metal Pentagrid Converter Radio Tube USED
Vacuum Tube KEN RAD Type 12SA7 Metal Pentagrid Converter Radio Tube USED
$3.00
Time Remaining: 2d 4h 56m
Buy It Now for only: $3.00

KENRAD 6K7 NOS NIB SINGLE OR PAIR MANY AVAILABLE
KENRAD 6K7 NOS NIB SINGLE OR PAIR MANY AVAILABLE
$11.95
Time Remaining: 2d 8h 58m
Buy It Now for only: $11.95

Vintage Stereo Vacuum Radio Tube Ken  Rad 6J5
Vintage Stereo Vacuum Radio Tube Ken Rad 6J5
$19.88
Time Remaining: 2d 11h 46m
Buy It Now for only: $19.88

NOS WWII Dated Ken Rad GE JAN CKR 832A VT 118 Radio Vacuum Tubes NIB
NOS WWII Dated Ken Rad GE JAN CKR 832A VT 118 Radio Vacuum Tubes NIB
$39.99
Time Remaining: 2d 12h 12m
Buy It Now for only: $39.99

One Balloon Shape Type 45 Tube By KEN RAD
One Balloon Shape Type 45 Tube By KEN RAD
$149.00
Time Remaining: 2d 12h 30m
Buy It Now for only: $149.00

Ken Rad Made In USA 35Z5 GT Working Vacuum Tube Radio Tube
Ken Rad Made In USA 35Z5 GT Working Vacuum Tube Radio Tube
$9.99
Time Remaining: 2d 12h 34m
Buy It Now for only: $9.99

Vintage KEN RAD Tube 35Z5 GT
Vintage KEN RAD Tube 35Z5 GT
$9.99
Time Remaining: 2d 13h 1m
Buy It Now for only: $9.99

Vintage KEN RAD Vacuum Tube 6AL5
Vintage KEN RAD Vacuum Tube 6AL5
$5.99
Time Remaining: 2d 14h 26m
Buy It Now for only: $5.99

New Old Stock Vintage Ken Rad Radio Tube 6C6 In Original Box Repairman Unused
New Old Stock Vintage Ken Rad Radio Tube 6C6 In Original Box Repairman Unused
$19.99
Time Remaining: 2d 15h 54m
Buy It Now for only: $19.99

Pair Ken Rad 17mm Long Silvery Black Plate 12AX7 1949 Vintage ECC83 Audio Tube
Pair Ken Rad 17mm Long Silvery Black Plate 12AX7 1949 Vintage ECC83 Audio Tube
$15.52 (5 Bids)
Time Remaining: 2d 16h 34m

2 Strong NOS Black Metal 6AG7 Tubes 1 Raytheon  1 Ken Rad no box
2 Strong NOS Black Metal 6AG7 Tubes 1 Raytheon 1 Ken Rad no box
$9.74
Time Remaining: 2d 17h 21m
Buy It Now for only: $9.74

Radio Tubes 6SK7 Ken Rad Test 92
Radio Tubes 6SK7 Ken Rad Test 92
$6.74
Time Remaining: 2d 17h 55m
Buy It Now for only: $6.74

Ken Rad 6SQ7 Vintage Metal Tube Made in USA
Ken Rad 6SQ7 Vintage Metal Tube Made in USA
$3.95
Time Remaining: 2d 18h 20m
Buy It Now for only: $3.95

Radio Tubes 12SC7 Ken Rad Poor Box NOS
Radio Tubes 12SC7 Ken Rad Poor Box NOS
$11.24
Time Remaining: 2d 19h 9m
Buy It Now for only: $11.24

Radio Tubes 6B7 Ken Rad Test 1200 135 135
Radio Tubes 6B7 Ken Rad Test 1200 135 135
$8.99
Time Remaining: 2d 20h 32m
Buy It Now for only: $8.99

Lot 3 KEN RAD JAN CKR CRC 6AG7 VT 247 Audio Radio Amp Electronic Vacuum Tube
Lot 3 KEN RAD JAN CKR CRC 6AG7 VT 247 Audio Radio Amp Electronic Vacuum Tube
$9.99
Time Remaining: 2d 21h 17m
Buy It Now for only: $9.99

6V6GT 1 KEN RAD 6V6GTG VINTAGE VACUUM TUBE
6V6GT 1 KEN RAD 6V6GTG VINTAGE VACUUM TUBE
$24.95
Time Remaining: 2d 21h 35m
Buy It Now for only: $24.95

2 X KEN RAD 6K6G BLACK PLATE TUBES TESTED GREAT
2 X KEN RAD 6K6G BLACK PLATE TUBES TESTED GREAT
$38.00
Time Remaining: 2d 22h 26m
Buy It Now for only: $38.00


Comments are closed.