READ FIRST!

WE ARE NOT ASSOCIATED WITH THE TUBE STORE OR ANY OTHER ONLINE TUBE RETAILER. THIS INCLUDES ANY RETAILER SELLING PREPACKAGED “DR. Z BUNDLES” OR ANY LISTINGS REFERRING TO DR. Z OR ANY OF THE AMP MODELS.

READ FIRST!

If you have any questions on tube availability or substitutions, direct them to repairs@drzamps.com. ASK BEFORE YOU BUY OR TRY!

***We DO NOT recommend using any other 6V6 power tube other than the JJ 6V6. THIS INCLUDES NOS 6V6.***

Tube and Bias Info

This list is our current tube type, location and bias points for all of the Dr. Z Amps.

Current tube line up Sept, 2024

Carmen Ghia

V1: JJ ECC83, V2: Tung Sol 12AX7, V3/4: NOS 6n14n (EL84 – matched pair), V5: JJ 5Y3

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Fuse Value: 1A 250V SLO 1.25″ x .25″

Cure

V1: JJ ECC83 V2: JJ ECC83 V3: Sovtek 12AX7 LPS V4-5: Tung Sol 5881 (matched pair) V6: Sovtek 5AR4

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Fuse Value: 1.5A 250V SLO 1.25″ x .25″

Jetta

V1: JJ ECC83S, V2: JJ ECC83S, V3-4: JJ 7591 (matched pair), V5: Sovtek 5AR4

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Fuse Value: 2A 250V SLO 1.25″ x .25″

Maz 18 (reverb)

V1: JJ ECC83S, V2: JJ ECC83S, V3: JJ ECC81, V4: 12AX7/ECC83, V5: Sovtek 12AX7LPS, V6/7: NOS 6N14N (EL84 – matched pair), V8: Sovtek 5AR4

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Fuse Value: 1.5A 250V SLO 1.25″ x .25″

Maz 18 NR

V1: JJ ECC83S, V2: JJ ECC83S, V3: Sovtek 12AX7LPS, V4/5: NOS 6N14N (EL84 – matched pair), V6: Sovtek 5AR4

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Fuse Value: 1.5A 250V SLO 1.25″ x .25″

Maz 38 (reverb)

V1: JJ ECC83S, V2: JJ ECC83, V3: JJ ECC81, V4: Sovtek 12AX7WB, V5: Sovtek 12AX7LPS, V6-9: JJ EL84 (matched quad), V10: Sovtek 5AR4

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Fuse Value: 2A 250V SLO 1.25″ x .25″

Maz 38 NR

V1: JJ ECC83S, V2: JJ ECC83S, V3: Sovtek 12AX7LPS, V4-7: JJ EL84 (matched quad), V8: Sovtek 5AR4

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Fuse Value: 2A 250V SLO 1.25″ x .25″

NOVA

V1: EH 12AX7, V2: EH 12AX7, V3: EH 12AX7, V4/5: Tung Sol 5881 (matched pair), V6: EH 5U4GB

Recommended Bias Point: 28mA

Fuse Value: 2A 250V SLO 1.25″ x .25″

Octal Six

V1: JJ 6SL7, V2: Tung-Sol 6SN7, V3/4: JJ 7591s (matched pair)

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Fuse Value: 2A 250V SLO 1.25″ x .25″

X-RAY

V1: NOS 5879, V2: EH 12au7, V3: EH 12ax7, V4-7: NOS 6N14N (EL84 – matched quad), V8: Psvane 5AR4

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Fuse Value: 2A 250V SLO 1.25″ x .25″

Z-28 Mk. II

V1: NOS Winged C EF-86, V2: EHX 12ax7LPS, V3-4: Tung Sol 5881s (matched pair), V5: Psvane 5AR4

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Fuse Value: 1.5A 250V SLO 1.25″ x .25″

Z-LUX

(Up to and including serial number DD.38456)

V1: Mullard ECC83 (12AX7), V2: JJ ECC83, V3: NOS 6201*, V4: Sovtek 12AX7 LPS, V5: 12AX7WB, V6: Tung Sol 12AX7, V7-10: JJ 6V6 *** (matched quad)

(Starting with serial number DD.38457)

V1: Mullard ECC83 (12AX7), V2: JJ ECC83, V3: JJ ECC81, V4: Tung Sol 12AX7, V5: 12AX7WB, V6: Sovtek 12AX7 LPS, V7-10: JJ 6V6 *** (matched quad)

V1: First Stage, V2: Tone Stack Driver, V3: Reverb Driver, V4: Reverb Recovery, V5: Tremolo, V6: Phase Inverter

*This tube must be a NOS 6201 NOT a new production ECC81/12AT7 in amps up to and including serial number DD.38456

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Fuse Value: 2A 250V SLO 1.25″ x .25″

Z-Master

V1: JJ ECC83, V2: JJ ECC83, V3: JJ ECC83, V4-5: Tung Sol 5881 (matched pair), V6: Sovtek 5AR4

Recommended Bias Point: 30mA

Fuse Value: 2A 250V SLO 1.25″ x .25″

Z-PLUS

V1: Tung Sol 12AX7, V2: JJ ECC83, V3: JJ ECC81, V4: Tung Sol 12AX7, V5: JJ ECC83, V6-7: JJ 6V6 ***(matched), V8: Shu Guang 5AR4

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Fuse Value: 1A 250V SLO 1.25″ x .25″

Z Verb

V1: Sovtek 12AX7WB, V2: NOS 12AT7, V3: JJ 6V6

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Fuse Value: .5A 250V SLO 1.25″ x .25″

Z-Wreck

V1-3: Tung Sol 12AX7, V4-7: NOS 6N14N (EL84 – matched quad), V8: Sovtek 5AR4

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Fuse Value: 2A 250V SLO 1.25″ x .25″

Z-Wreck Jr.

V1-3: Tung Sol 12AX7, V4-5: NOS 6N14N (EL84 – matched pair), V6: JJ 5Y3

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Fuse Value: 1A 250V SLO 1.25″ x .25″

Legacy Models

Antidote

V1-2: JJ ECC83, V3: Sovtek 12AX7 LPS, V4/5: Gold Lion KT66 (matched pair), V6: Sovtek 5AR4

Recommended Bias Point: 33mA

CAZ 45

V1: 12AX7WB, V2: 12AX7WB, V3: EHX 12DW7, V4: 12AX7WB, V5/6: Tung Sol 6L6STR (matched pair)

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Fuse Value: 2A 250V SLO 1.25″ x .25″

EMS

V1-V3: 12AX7,  V4/5: EHX EL34 (matched pair), V6: EHX 5U4GB

Recommended Bias Point: 36mA (while in Solid State Rectifier Mode)

Fuse Value: 3A 250V FAST 1.25″ x .25″

DB4

V1: NOS 5879, V2: Sovtek 12AX7 LPS, V3-6 JJ EL84 (matched quad), V7: Shu Guang 5AR4

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Delta 88

V1: EF86, V2: 12AX7, V3/4: KT88 (matched pair)

Recommended Bias Point: 34mA

EZG 50

V1: 12AX7, V2: NOS 12AT7/6201, V3: 12AX7, V4: NOS 12AT7/6201, V5/6: Tung Sol 6L6GC STR(matched pair), V7: 5AR4

Recommended Bias Point: 28mA

Fuse Value: 2A 250V SLO 1.25″ x .25″

Galaxie

V1: Mullard 12AX7, V2: Sino 12AX7WA, V3: Sovtek 12AX7LPS, V4/5: GT 6L6 (matched pair), V6: JJ 5U4

Recommended Bias Point: 27mA

JAZ 20/40

V1: Mullard 12AX7, V2: JJ ECC83S, V3: JJ ECC81, V4: Tung Sol 12AX7, V5: JJ ECC83S, V6: Sovtek 12AX7LPS, V7-10: JJ 6V6 (matched quad)

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

KT 45

V1: NOS EF86, V2: Sovtek 12AX7LPS, V3/4: JJ E34L (matched pair), V5 Solid State plug in or Sovtek 5AR4

Recommended Bias Point: 34mA

M12

V1: NOS Winged C EF86, V2: Sovtek 12AX7 LPS, V3/4:  JJ EL84 (matched pair), V5: JJ 5Y3

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Maz 8

V1: JJ 12AX7, V2: JJ 12AX7, V3: 12AU7/ECC82, V4: Sovtek 12AX7WB, V5: Sovtek 12AX7 LPS, V6: NOS 6N14N (EL84), V7: Sovtek 5AR4

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Mazerati GT

V1: JJ ECC83S, V2: Sovtek 12AX7LPS, V3-6: JJ EL84S (matched quad), V7: Sovtek 5AR4

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Mazerati

V1:12AX7, V2: 5751, V3-6: EL84 (matched quad), V7: 5AR4

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Mini Z

V1: JJ ECC83S, V2: 6N14N (EL84)

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Monza

V1: JJ ECC83S, V2: Sovtek 12AX7LPS, V3/4: JJ EL84 (matched pair), V5: Sovtek 5AR4

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Prescription Jr

V1: JJ ECC83S, V2: NOS EF86, V3: JJ ECC83S, V4/5: JJ EL84 (matched pair), V6: NOS 5Y3

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Prescription ES

V1: JJ ECC83S, V2: NOS EF86, V3: JJ ECC83S, V4-7: JJ EL84 (matched quad), V8: Sovtek 5AR4

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Remedy

V1: JJ ECC83S, V2: JJ ECC83S, V3: Tung Sol 12AX7, V4-7: JJ 6V6 (matched quad)

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Route 66

V1: NOS EF86, V2: Sovtek 12AX7LPS, V3/4: Genelex Gold Lion KT66 (matched pair), V5: EH 5U4

Recommended Bias Point: 36mA

6545

V1: 12AX7, V2 12AX7, V3: EF86, V4:12AX7, V5/6 EL34 (matched pair), V7: 5AR4

Recommended Bias Point: 34mA

SRZ65

V1: JJ ECC83S, V2: JJ ECC83, V3: Sovtek 12AX7LPS, V4/5: JJ E34L (matched pair), V6: Sovtek 5AR4

Recommended Bias Point: 34mA

Stang Ray

V1: EF86, V2: Sovtek 12AX7LPS, V3-6: JJ EL84 (matched quad), V7: Shu Guang 5AR4

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Surgical Steel

V1: NOS EF86, V2: NOS 12DW7/7247, V3: Sovtek 12AX7LPS, V4/5: KT88 (matched pair)

Recommended Bias Point: 40mA

Therapy

V1: JJ ECC83, V2: Ruby 12AX7 AC5 HG+, V3-4: JJ 6L6 GC (matched pair), V5: Shu Guang 5AR4

Recommended Bias Point: Cathode Biased (no re-biasing necessary)

Fuse Value: 2A 250V SLO 1.25″ x .25″

Z28

V1: NOS EF86, V2: Tung Sol 12AX7, V3/4: JJ 6V6 (matched pair), V5: Sovtek 5AR4

Recommended Bias Point: 28mA

*substitutions may be used without notice

** ECC83=12AX7, GZ34=5AR4

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