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.

.

Ken Rad 6K6GT Vintage Tube Black Glass Made in USA Tests NOS
Ken Rad 6K6GT Vintage Tube Black Glass Made in USA Tests NOS
$7.95
Time Remaining: 53m
Buy It Now for only: $7.95

2 CROSLEY KEN RAD 42 TUBES FOR VINTAGE RADIO AMP STEREO AMPLIFIER PROJECT
2 CROSLEY KEN RAD 42 TUBES FOR VINTAGE RADIO AMP STEREO AMPLIFIER PROJECT
$12.95 (1 Bid)
Time Remaining: 1h 9m

TYPE 27 KEN RAD VACUUM TUBE L5
TYPE 27 KEN RAD VACUUM TUBE L5
$6.95
Time Remaining: 3h 24m
Buy It Now for only: $6.95

5 VINTAGE 1944 KEN RAD JAN CKR 6L7 VT87 NOS MIL SPEC VACUUM TUBES TESTED STRONG
5 VINTAGE 1944 KEN RAD JAN CKR 6L7 VT87 NOS MIL SPEC VACUUM TUBES TESTED STRONG
$99.99
Time Remaining: 4h
Buy It Now for only: $99.99

Ken Rad 12at6 Radio tube
Ken Rad 12at6 Radio tube
$8.99
Time Remaining: 4h 17m
Buy It Now for only: $8.99

Ken Rad 12BD6 Radio tube
Ken Rad 12BD6 Radio tube
$12.99
Time Remaining: 4h 17m
Buy It Now for only: $12.99

NOS Ken Rad 6SA7GT G radio tube in original boxtested greatgray glass6SA7
NOS Ken Rad 6SA7GT G radio tube in original boxtested greatgray glass6SA7
$5.99
Time Remaining: 4h 18m
Buy It Now for only: $7.95

2 6A6 Ken Rad Raytheon Radio Vacuum TUBES audio TV7 tested guaranteed
2 6A6 Ken Rad Raytheon Radio Vacuum TUBES audio TV7 tested guaranteed
$9.99
Time Remaining: 5h 6m

3 24A RCA Van Dyke Ken Rad Radio 2 engraved bases TUBES TV7 tested guaranteed
3 24A RCA Van Dyke Ken Rad Radio 2 engraved bases TUBES TV7 tested guaranteed
$11.50
Time Remaining: 5h 8m

2 57 Silvertone  Ken Rad Radio Vacuum TUBES audio TV7 tested guaranteed
2 57 Silvertone Ken Rad Radio Vacuum TUBES audio TV7 tested guaranteed
$7.50
Time Remaining: 5h 8m

3 24 National Union  Ken Rad Radio Vacuum TUBES audio TV7 tested guaranteed
3 24 National Union Ken Rad Radio Vacuum TUBES audio TV7 tested guaranteed
$10.95
Time Remaining: 5h 8m

1 5Z3 Ken Rad Vintage Radio Vacuum TUBE audio TV7 tested guaranteed lot 103
1 5Z3 Ken Rad Vintage Radio Vacuum TUBE audio TV7 tested guaranteed lot 103
$10.50
Time Remaining: 5h 8m

12SK7 NOS tubes 3 pcs RCA WestinghouseKen Rad tested
12SK7 NOS tubes 3 pcs RCA WestinghouseKen Rad tested
$21.99
Time Remaining: 6h 45m
Buy It Now for only: $21.99

Ken Rad 50L6 GT Power Pentode Radio Tubes 2
Ken Rad 50L6 GT Power Pentode Radio Tubes 2
$4.95
Time Remaining: 6h 54m

Ken Rad 35Z5 GT Vacuum Tube
Ken Rad 35Z5 GT Vacuum Tube
$4.95
Time Remaining: 7h 3m

Matched Pair KEN RAD 6SK7 tubes test at New Level
Matched Pair KEN RAD 6SK7 tubes test at New Level
$29.99
Time Remaining: 7h 42m
Buy It Now for only: $29.99

KEN RAD 6V6GT G VT 107 A Black Glass Calibrated TV 7D U Tested Strong
KEN RAD 6V6GT G VT 107 A Black Glass Calibrated TV 7D U Tested Strong
$17.95
Time Remaining: 8h 23m

1 VINTAGE KEN RAD 6J7 NOS VACUUM TUBE TESTED STRONG AUDIO RADIO AMP
1 VINTAGE KEN RAD 6J7 NOS VACUUM TUBE TESTED STRONG AUDIO RADIO AMP
$24.99
Time Remaining: 10h 17m
Buy It Now for only: $24.99

RCA  KEN RAD LOT OF 5 VINTAGE ELECTRON TUBES
RCA KEN RAD LOT OF 5 VINTAGE ELECTRON TUBES
$6.64
Time Remaining: 10h 40m
Buy It Now for only: $6.64

NOS 1954 Ken Rad USA VT 231 JAN CKR 6SN7GT Black Flat Offset Plate Vacuum Tubr
NOS 1954 Ken Rad USA VT 231 JAN CKR 6SN7GT Black Flat Offset Plate Vacuum Tubr
$51.96
Time Remaining: 10h 43m
Buy It Now for only: $51.96

Lot Of 315 Vintage Radio Tubes RCA GE KEN RAD SYLVANIA DELCO
Lot Of 315 Vintage Radio Tubes RCA GE KEN RAD SYLVANIA DELCO
$157.50 (22 Bids)
Time Remaining: 10h 45m

NOS NIB Ken Rad USA 6Z7G Black Plate Smoked Glass Vacuum Tube
NOS NIB Ken Rad USA 6Z7G Black Plate Smoked Glass Vacuum Tube
$5.56
Time Remaining: 10h 48m
Buy It Now for only: $5.56

NOS NIB Ken Rad USA 6Z7G Black Plate Smoked Glass Vacuum Tube 100+
NOS NIB Ken Rad USA 6Z7G Black Plate Smoked Glass Vacuum Tube 100+
$5.56
Time Remaining: 11h 10m
Buy It Now for only: $5.56

NOS NIB Matched Pair Ken Rad USA 6Z7G Black Plate Smoked Glass Vacuum Tubes
NOS NIB Matched Pair Ken Rad USA 6Z7G Black Plate Smoked Glass Vacuum Tubes
$11.96
Time Remaining: 11h 12m
Buy It Now for only: $11.96

NOS Matched Pair 1955 Ken Rad VT 107A JAN CKR 6V6GT Black Smoked Vacuum Tubes
NOS Matched Pair 1955 Ken Rad VT 107A JAN CKR 6V6GT Black Smoked Vacuum Tubes
$47.96
Time Remaining: 11h 23m
Buy It Now for only: $47.96

1952 Ken Rad USA 6V6GT Black Round Plate Smoked Glass Vacuum Tube 87
1952 Ken Rad USA 6V6GT Black Round Plate Smoked Glass Vacuum Tube 87
$10.36
Time Remaining: 11h 58m
Buy It Now for only: $10.36

VINTAGE KEN RAD 6AV6 VACUUM TUBE TESTED STRONG RADIO HAM AUDIO AMPLIFIER
VINTAGE KEN RAD 6AV6 VACUUM TUBE TESTED STRONG RADIO HAM AUDIO AMPLIFIER
$5.99
Time Remaining: 12h 55m
Buy It Now for only: $5.99

Ken Rad 1N5 GT Vintage Tube  Tube Socket
Ken Rad 1N5 GT Vintage Tube Tube Socket
$4.50
Time Remaining: 13h 6m

Match Quad High Test KEN RAD VT 231 JAN 6SN7GT Audio Amp Vacuum Tubes Black
Match Quad High Test KEN RAD VT 231 JAN 6SN7GT Audio Amp Vacuum Tubes Black
$305.00 (22 Bids)
Time Remaining: 13h 19m

Radio Tubes 2051 Ken Rad Test 115
Radio Tubes 2051 Ken Rad Test 115
$10.49
Time Remaining: 13h 20m
Buy It Now for only: $10.49

Vintage Ken Rad 24A Stereo Tube 0254 721 54
Vintage Ken Rad 24A Stereo Tube 0254 721 54
$27.99
Time Remaining: 13h 24m
Buy It Now for only: $27.99

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: 14h 29m
Buy It Now for only: $9.99

Vintage Smoked JAN CKR KenRad 6V6 GT G VT 107A Stereo Tube Results  4230
Vintage Smoked JAN CKR KenRad 6V6 GT G VT 107A Stereo Tube Results 4230
$28.99
Time Remaining: 14h 40m
Buy It Now for only: $28.99

Ken Rad Type 36 Vacuum Radio Tube New
Ken Rad Type 36 Vacuum Radio Tube New
$12.50
Time Remaining: 14h 52m
Buy It Now for only: $12.50

55 ENGRAVED WITH KEN RAD75 ENGRAVED WITH PHILCO58 ENGRAVED WITH CUNNINGHAM
55 ENGRAVED WITH KEN RAD75 ENGRAVED WITH PHILCO58 ENGRAVED WITH CUNNINGHAM
$1.30
Time Remaining: 15h 45m

SEVEN NOS POWER TUBES KENRAD GE USA 6L6G BLACK GLASS 6V6GT 6K6 6V6GTY NEW NOS
SEVEN NOS POWER TUBES KENRAD GE USA 6L6G BLACK GLASS 6V6GT 6K6 6V6GTY NEW NOS
$215.00
Time Remaining: 16h 55m
Buy It Now for only: $215.00

Ken Rad NEW NOS METAL 12SK7 Tubes Military Grade
Ken Rad NEW NOS METAL 12SK7 Tubes Military Grade
$20.00
Time Remaining: 19h 28m
Buy It Now for only: $20.00

Ken Rad NEW NOS METAL 12SJ7 Tubes Military Grade AUDIO
Ken Rad NEW NOS METAL 12SJ7 Tubes Military Grade AUDIO
$20.00
Time Remaining: 19h 28m
Buy It Now for only: $20.00

Radio Tubes 6SK7 Ken Rad Test 97
Radio Tubes 6SK7 Ken Rad Test 97
$6.74
Time Remaining: 23h 17m
Buy It Now for only: $6.74

Radio Tubes 6SK7 Ken Rad Test 98
Radio Tubes 6SK7 Ken Rad Test 98
$7.49
Time Remaining: 23h 20m
Buy It Now for only: $7.49

Radio Tubes 6A8 Ken Rad JAN CKR Test 96
Radio Tubes 6A8 Ken Rad JAN CKR Test 96
$11.99
Time Remaining: 23h 23m
Buy It Now for only: $11.99

Radio Tubes 6D6 Ken Rad Test 1800
Radio Tubes 6D6 Ken Rad Test 1800
$11.24
Time Remaining: 23h 24m
Buy It Now for only: $11.24

1626 KEN RAD NOS pair
1626 KEN RAD NOS pair
$42.50
Time Remaining: 1d 23m
Buy It Now for only: $42.50

RCA Ken Rad Tung Sol Mixed USA 9001 Lot Of 27 Type 9001 Vacuum Tubes Most NIB
RCA Ken Rad Tung Sol Mixed USA 9001 Lot Of 27 Type 9001 Vacuum Tubes Most NIB
$19.95
Time Remaining: 1d 1h 50m
Buy It Now for only: $19.95

Ken Rad JAN 12SK7 VT 131 vacuum tube tested and guaranteed
Ken Rad JAN 12SK7 VT 131 vacuum tube tested and guaranteed
$10.95
Time Remaining: 1d 2h 13m
Buy It Now for only: $10.95

1 Ken Rad JAN CKR 3E29 Transmitting tube Tested Good
1 Ken Rad JAN CKR 3E29 Transmitting tube Tested Good
$14.99
Time Remaining: 1d 4h 14m
Buy It Now for only: $14.99

Pair 6SC7 Metal Vacuum Tubes RCA Ken Rad NOS
Pair 6SC7 Metal Vacuum Tubes RCA Ken Rad NOS
$19.99
Time Remaining: 1d 4h 23m
Buy It Now for only: $19.99

One Ken Rad USNavy CKR 78 RF Pentode radio tube Silver Plate
One Ken Rad USNavy CKR 78 RF Pentode radio tube Silver Plate
$9.50
Time Remaining: 1d 5h 49m
Buy It Now for only: $9.50

One Ken Rad USNavy CKR 78 RF Pentode radio tube Silver Plate
One Ken Rad USNavy CKR 78 RF Pentode radio tube Silver Plate
$9.55
Time Remaining: 1d 5h 52m
Buy It Now for only: $9.55

One new in box Ken Rad CKR 6E5 magic eye tube military issue 6E5
One new in box Ken Rad CKR 6E5 magic eye tube military issue 6E5
$34.95
Time Remaining: 1d 6h 2m
Buy It Now for only: $34.95

1 Ken Rad 5Z4 metal tube tested  86 86 NOS NIB Audio Amp Radio
1 Ken Rad 5Z4 metal tube tested 86 86 NOS NIB Audio Amp Radio
$12.99
Time Remaining: 1d 6h 46m
Buy It Now for only: $12.99

NOS TESTED Vintage Electronic Vacuum Tube Ken Rad 7B4 G90
NOS TESTED Vintage Electronic Vacuum Tube Ken Rad 7B4 G90
$8.95
Time Remaining: 1d 7h 16m
Buy It Now for only: $8.95

Vintage KEN RAD Radio Vacuum Tube one 19BG6G GE
Vintage KEN RAD Radio Vacuum Tube one 19BG6G GE
$10.00
Time Remaining: 1d 7h 22m
Buy It Now for only: $10.00

1 Ken Rad VT 221 3Q5GT Tube NIB NOS Audio Amp Ham Tested good
1 Ken Rad VT 221 3Q5GT Tube NIB NOS Audio Amp Ham Tested good
$8.99
Time Remaining: 1d 7h 31m
Buy It Now for only: $8.99

1 VINTAGE KEN RAD JAN CKR 813 VT 144 TESTED
1 VINTAGE KEN RAD JAN CKR 813 VT 144 TESTED
$59.00
Time Remaining: 1d 9h 18m
Buy It Now for only: $59.00

One Ken Rad JAN CKR 6Q7 radio tube TV7B tested  407043 min204040
One Ken Rad JAN CKR 6Q7 radio tube TV7B tested 407043 min204040
$4.25
Time Remaining: 1d 9h 54m
Buy It Now for only: $4.25

1 VINTAGE KEN RAD 6J6 NOS VACUUM TUBE TESTED STRONG AUDIO HAM RADIO AMPLIFIER
1 VINTAGE KEN RAD 6J6 NOS VACUUM TUBE TESTED STRONG AUDIO HAM RADIO AMPLIFIER
$4.99
Time Remaining: 1d 9h 56m
Buy It Now for only: $4.99

lot of 21 vintage 6sn7 tubes tung solsylvaniarcaken radge
lot of 21 vintage 6sn7 tubes tung solsylvaniarcaken radge
$149.99
Time Remaining: 1d 10h 18m

Radio Tubes 6J7 VT 91 Ken Rad JAN CKR Test 102
Radio Tubes 6J7 VT 91 Ken Rad JAN CKR Test 102
$9.74
Time Remaining: 1d 12h 3m
Buy It Now for only: $9.74

Ken Rad Vacuum Tube Radio Amplfier JKR 9006
Ken Rad Vacuum Tube Radio Amplfier JKR 9006
$7.00
Time Remaining: 1d 12h 5m
Buy It Now for only: $7.00

VINTAGE KEN RAD 6D6 VACUUM TUBE TESTED STRONG RADIO HAM AUDIO AMP
VINTAGE KEN RAD 6D6 VACUUM TUBE TESTED STRONG RADIO HAM AUDIO AMP
$9.99
Time Remaining: 1d 12h 19m
Buy It Now for only: $9.99

Radio Tubes 6L7 Ken Rad Tube NOS
Radio Tubes 6L7 Ken Rad Tube NOS
$9.74
Time Remaining: 1d 12h 28m
Buy It Now for only: $9.74

Super Nice 5U4G Full Wave Rectifier Tube by KEN RAD Used Test GOOD Black Plates
Super Nice 5U4G Full Wave Rectifier Tube by KEN RAD Used Test GOOD Black Plates
$11.00 (2 Bids)
Time Remaining: 1d 12h 30m

Vintage KEN RAD 6A8 Stereo Tube 1000 650 4892
Vintage KEN RAD 6A8 Stereo Tube 1000 650 4892
$32.99
Time Remaining: 1d 13h 19m
Buy It Now for only: $32.99

Ken Rad 12SH7 Vacuum Tube TESTED GOOD
Ken Rad 12SH7 Vacuum Tube TESTED GOOD
$0.99
Time Remaining: 1d 16h 26m
Buy It Now for only: $0.99

6SJ7 VT 116 Ken Rad Vacuum Tube TV 7 tested at105 of NOS
6SJ7 VT 116 Ken Rad Vacuum Tube TV 7 tested at105 of NOS
$3.50
Time Remaining: 1d 18h 4m

6SJ7GT Ken Rad Vacuum Tube TV 7 tested to 105 of NOS Date Code is 6 52
6SJ7GT Ken Rad Vacuum Tube TV 7 tested to 105 of NOS Date Code is 6 52
$3.50
Time Remaining: 1d 18h 5m

Pair Military Matched Ken Rad Metal JAN CKR 6SH7 Vacuum Tubes
Pair Military Matched Ken Rad Metal JAN CKR 6SH7 Vacuum Tubes
$9.99
Time Remaining: 1d 18h 15m
Buy It Now for only: $9.99

Three NOS Ken Rad JAN CKR 6SA7 VT 150 Vacuum Tubes Valves Tested Strong NIB
Three NOS Ken Rad JAN CKR 6SA7 VT 150 Vacuum Tubes Valves Tested Strong NIB
$14.99
Time Remaining: 1d 20h 23m
Buy It Now for only: $14.99

9 x RCA Kenrad 9001 tubes
9 x RCA Kenrad 9001 tubes
$19.00
Time Remaining: 1d 21h 43m
Buy It Now for only: $19.00

PAIR QTY 2 VT 93 6B8 KEN RAD US ARMY VINTAGE NOS TUBES NEW OLD STOCK IN BOX
PAIR QTY 2 VT 93 6B8 KEN RAD US ARMY VINTAGE NOS TUBES NEW OLD STOCK IN BOX
$12.50
Time Remaining: 2d
Buy It Now for only: $12.50

One Ken Rad 6C5G tube Hickok TV 7B tested 74 min50
One Ken Rad 6C5G tube Hickok TV 7B tested 74 min50
$24.95
Time Remaining: 2d 1h 11m
Buy It Now for only: $24.95

Vintage Ken Rad JAN CKR 6L6 Radio Valve Electronic Vacuum Tube 7 Seven Pin
Vintage Ken Rad JAN CKR 6L6 Radio Valve Electronic Vacuum Tube 7 Seven Pin
$7.57
Time Remaining: 2d 1h 19m
Buy It Now for only: $7.57

Vintage Lot 9 Used GE KEN RAD Radio Vacuum Tubes Parts
Vintage Lot 9 Used GE KEN RAD Radio Vacuum Tubes Parts
$19.99
Time Remaining: 2d 2h 21m
Buy It Now for only: $19.99

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: 2d 2h 46m
Buy It Now for only: $149.99

Two Ken Rad 6SN7GT VT 231 military issue matching pair 3 6SN7 6SN7GT
Two Ken Rad 6SN7GT VT 231 military issue matching pair 3 6SN7 6SN7GT
$178.95
Time Remaining: 2d 2h 57m
Buy It Now for only: $178.95


Comments are closed.