JTM45 Build Checklist
A check list for the parts you need for your JTM45 build.
The list is roughly in the order you will need the parts.
The required quantities are shown next to the default items.
Item marked with a yellow M are the parts used in the MetroAmp build instructions.
There are options available for some parts. Read each section carefully, adjust the quantities if needed; and add the items to your cart.
The list is roughly in the order you will need the parts.
The required quantities are shown next to the default items.
Item marked with a yellow M are the parts used in the MetroAmp build instructions.
There are options available for some parts. Read each section carefully, adjust the quantities if needed; and add the items to your cart.
Instructions | |||
| You can download the MetroAmp instructions here: Download JTM_45_KIT_V2.1.pdf | |||
Prerequisites | |||
| These are the things you need to acquire ahead of time: Transformers - Click here for more info | |||
Barebones Kit | |||
| MetroAmp JTM45 Barebones Kit All of the items marked with a yellow M (except for choke) | $389 | ||
Chassis | |||
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MetroAmp JTM45 Chassis .090" aluminum chassis. Layout from a '65 JTM45. Dimensions: 18 3/8" x 6 3/4" x 2 1/2", including the mounting tabs. | $65.00 M | |
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MetroAmp Power Transformer Mounting Plate for 12 Series and JTM45 Chassis | $16.00 M | |
Choke | |||
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7H JTM45 Choke - Mercury Magnetics | $45.00 M | |
Panels | |||
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MetroAmp JTM45 Panel Set MetroAmp panels are supplied undrilled unless they are ordered with a chassis. | $50.00 M | |
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JTM45 Style face plate from Sparky |
$35.00 | |
| Custom JTM45 Style back plate Contact us to discuss your chassis type. |
$45.00 | ||
Boards | |||
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MetroAmp JTM45 PTP Board Save $$$! NOS versions of this board are available here | $30.00 M | |
 | New! Double Turret JTM45 PTP Board | $35.00 | |
MechanicalsThe things you need to bolt down to get started! | |||
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3/8" Rubber Grommet for 3/8" chassis opening, 9/32" inside diameter |
$0.25 M |
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| 1/2" Rubber Grommet for 1/2" chassis opening, 3/8" inside diameter | $0.35 M | ||
 | 2 Hole Solder lug #6 internal tooth | $1.20 pkg of 10 M | |
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New Plexi Amp Hardware Kit More Hardware for amp with laydown power transformers All bolts have round heads Large bolts:(6) 1/2" #10,(4) #8 Nuts/washers for PT Small bolts:(6) 1/2",(6) 3/8" - #4 size | $16.45 M | |
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8 Pin Micalex Socket 1 1/2" mounting centers, fits 1 3/16" to 1 1/4" chassis hole, top or bottom mount. | $3.50 M | |
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9 Pin Micalex Socket with shield base Fits 3/4" chassis hole. 1 1/8" mounting centers. | $2.95 M | |
| Shield for 9 pin socket | $1.95 M | ||
 | Medium Can Clamp 1 3/8" | $2.00 M | |
Chassis Mounted Capacitors - stock setup uses (1)32uf and (1)16uf | |||
F&T Can Capacitors | |||
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F&T Dual 32uf 500v For mains and screens | $9.95 M | |
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F&T Dual 16uf 450v For Phase Inverter | $9.95 M | ||
ARS Can Capacitors | |||
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ARS 32uf/32uf Dual Can Capacitor 500v Re-formed and ready to go | $13.00 | |
Alternate Phase Inverter Cap - Optional | |||
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TAD 32uf Can 500v Used with Metro builds | $6.95 | |
 | Small Can Clamp 1" - Used with TAD 32uf can cap | $2.00 | |
Wire and Wiring AccessoriesYour going to need these things... make sure you have them now! | |||
 | Plexi Amp Wiring Kit
12 feet of Red and Black. 7 feet each of Brown, Orange, Yellow, Green, Blue, Purple and White. | $14.55 M | |
 | 22awg Tinned Buss wire | $0.10 per foot | |
| 18awg Tinned Buss wire | $0.20 per foot M | ||
 | 18awg Sleeving PVC Coated Fiberglass | $0.50 per foot M | |
 | 1/8" Heat Shrink | $0.20 per 4" M | |
| 1/4" Heat Shrink | $0.25 per 4" M | ||
 | 4" Cable Tie Black | $0.50 pkg of 10 M | |
Screen Socket ResistorsYou need to pick a style and get two of these! | |||
| 470 ohm 5 watt Ohmite | $2.00 M | |
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Welwyn 470 ohm 7watt Wirewound Resistor | $1.95 | |
Preamp Capacitor | |||
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F&T Axial 16uf 475v .64" diameter x 1.55" length | $4.95 M | |
Coupling CapacitorsAdditional choices - click here: More Coupling Caps | |||
Synergy Royal Mustards Capacitors | |||
 | Synergy Royal Mustards .022uf 500v | $4.00 | |
| Synergy Royal Mustards .1uf 500v | $5.70 | ||
Mallory 150 Capacitors | |||
| Note: Picture does not indicate actual capacitor. Capacitors are yellow unless otherwise idicated. | |||
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Mallory .022uf 630v (yellow case) | $0.75 M | |
| Mallory .1uf 630v (yellow case) | $1.00 M | ||
Marshall Components KitThe small components needed to complete the kit! | |||
 | Resistors: All 1 watt and 2 watt resistors included Silver Mica Caps: (3) 500pf, (1) 250pf, (1) 100pf, (1) 47pf Small Electrolytic Caps: (2)10uf bias and (2)cathode bypass ((1)330uf and (1)220-250uf) Brands and types provided may vary depending upon availability | ||
Top Hat Diodes | |||
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Top Hat Diode 1000v 1Amp | $2.95 | |
Alternate Electrolytics - Select "No Aluminum Caps" from the kit above | |||
Cathode Bypass Capacitors - Pick one for the Normal channel | |||
 | BC Components 220uf axial 25v | $1.50 | |
| BC Components 330uf axial 25v | $2.00 | ||
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BC Components 330uf axial 25v - Light Blue Higher temp version | $3.95 | |
 | Sprague Atom 250uf axial 25v | $4.25 | |
| Sprague 330uf axial 25v | $1.95 | ||
Bias Capacitors - Pick two of the same type | |||
 | BC 10uf Axial 160v | $2.50 | |
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BC Components 10uf axial 250v - Newer dark blue 25mm x 10mm | $2.50 | |
 | Xicon 10uf axial 160v | $1.00 | |
Wiring Tube Sockets and Transformers | |||
 | Marshall New Style Impedance Selector | $19.95 M | |
Voltage Selector - Optional | |||
 | Marshall New "Modern" Voltage Selector | $36.00 | |
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120v Amber Indicator | $9.95 M | |
Power & Standby Switches | |||
 | SPST Switch 3A @250V, 6A @125V; 1/2" mounting hole. | $3.50 M | |
 | Marshall Chrome Toggle Ring The more modern style with the beveled edges See vintage style here: More info | $3.95 M | |
FuseHolder - Internal Mount | |||
Internal chassis mount fuseholder | |||
 | Internal chassis mount fuseholder for 1.25" x 0.25" fuses | $1.50 M | |
FuseHolder - Panel MountOnly one required because the other fuse is mounted internally | |||
For 5/8" holes - Two similar ones available... | |||
 | Panel Mount Fuseholder for 1.25" x 0.25" fuses 5/8" mounting hole | $3.00 | |
| Panel Mount Fuseholder as used in Metro amps for 1.25" x 0.25" fuses 5/8" mounting hole | $7.00 M | ||
For 5/8" holes with Double-D shape (Ceriatone) | |||
 | Panel Mount Fuseholder for 1.25" x 0.25" fuses Fits 5/8" mounting hole with Double-D shape Fits Ceriatone chassis | $2.50 | |
For 1/2" holes | |||
 | Panel Mount Fuseholder for 1.25" x 0.25" fuses 1/2" mounting hole | $2.50 | |
Power Cords | |||
Modern IEC type connector and cords | |||
 | IEC Receptacle | $1.75 | |
| New! IEC punch service for aluminum chassis 28mm x 21mm rectangular cutout | $5.00 | ||
 | 8 foot Power Cord with IEC female end SVT (Marshall type) 18 awg. | $4.95 | |
| 12 foot Power Cord with IEC female end SVT (Marshall type) 18 awg. | $6.95 | ||
Bare End cords and strain relief | |||
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Strain relief for SVT cord 1/2" opening | $0.50 M | |
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New! Locking strain relief for SVT cord fits 1/2" opening | $1.50 | |
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8 foot Power Cord, 18 AWG, 3 Conductor, Black Bare end SVT type | $4.95 M | |
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12 foot Power Cord, 18 AWG, 3 Conductor, Black Bare end SVT type | $6.95 | ||
Jacks | |||
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Old Style Cliff Jack with metal ring Made in the UK. Not chinese knockoffs. About "counterfeit" Cliff jacks | $2.25 M | |
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New Style Cliff Jack with plastic ring Made in the UK. Not chinese knockoffs. | $2.25 M | |
Potentiometers - pick one | |||
Alpha Pot Amp Set | |||
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Volume: (2) 1m audio Additional pot sets Treble: (1) 250k linear Mid: (1) 25k linear Bass: (1) 1m audio Presence: (1) 5k linear | $8.95 M | |
CTS Pot Amp Set | |||
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5/16" bushing lengths, 3/8" brass shafts Volume: (2) 1m audio Additional pot sets Treble: (1) 250k linear Mid: (1) 25k linear Bass: (1) 1m audio Presence: (1) 5k linear | $28.95 | |
1/2 watt NOS AB Resistors - Optional | |||
Additional resistor choices - click here: More Carbon Comps | |||
 | 820 ohm 5% - Long leads | $2.00 | |
 | 27K ohm 5% - Long leads | $1.25 | |
 | 56K ohm 5% - Long leads | $1.25 | |
 | 68K ohm 5% - Long leads | $1.50 | |
 | 100K ohm 5% - long leads | $3.00 | |
 | 270K ohm 5% - Long leads | $1.50 | |
 | 1meg ohm 5% - Long leads | $1.75 | |
1 watt | |||
 | 8.2k ohm 5% - Long leads | $2.00 | |
 | 10k ohm 10% - Long leads | $2.00 | |
Knobs | |||
Additional knob choices - click here: More Knobs | |||
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Genuine Marshall Set-screw knob pkg of 8 The price in these just went up! | $28.00 | |
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Set-screw knob pkg of 8 Low profile knobs(0.6") with light gold colored caps. | $11.95 M | |
Fuses | |||
Fast Blow | |||
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.5 amp AGC - Fast Blo, HT Fuse .25" x 1.25" | $0.40 M | |
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2 amp AGC - Fast Blo, Mains Fuse (240v) .25" x 1.25" | $0.40 | ||
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3 amp AGC - Fast Blo, Mains Fuse (120v) .25" x 1.25" | $0.40 M | ||
Slow Blow | |||
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.5 amp AGC - Slo Blo, HT Fuse .25" x 1.25" | $0.80 | |
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2 amp AGC - Slo Blo, Mains Fuse (240v) .25" x 1.25" | $0.60 | ||
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3 amp AGC - Slo Blo, Mains Fuse (120v) .25" x 1.25" | $0.60 | ||
Chassis Mounting Bolts | |||
 | Chassis Mounting Bolts. Qty.4 | $3.95 M | |
Tubes | |||
Additional tube choices - click here: More Tubes | |||
 | JJ 12ax7 - spiral filament | $10.25 | |
 | Valve Art KT66 - Matched Pair | $63.00 | |
 | 5AR4/GZ34 Rectifier Tube - China | $13.50 | |
