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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.

Instructions

NOTE: PAYPAL HAS SLOWED DOWN THE RESPONSIVENESS OF THE "ADD TO CART" BUTTONS. WHEN YOU ADD ITEMS TO THE CART, THE PAYPAL CART WILL APPEAR IN A NEW BROWSER TAB OR WINDOW. MAKE SURE THAT THE ITEM YOU ARE ADDING APPEARS IN THE CART BEFORE YOU HIT THE NEXT "ADD TO CART" BUTTON OR ITEMS MAY NOT BE ADDED TO THE CART.
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)
$374
 

Chassis

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
 
MetroAmp Power Transformer Mounting Plate for 12 Series and JTM45 Chassis$16.00
 

Choke

7H JTM45 Choke - Mercury Magnetics $45.00
M
 

Panels

MetroAmp JTM45 Panel Set
*** Panels are supplied undrilled unless they are ordered with a chassis
$50.00
M
 
MetroAmp JTM45 front panel only ***$30.00
 
MetroAmp JTM45 back panel only ***$25.00
 
JTM45 Style face plate
Panel is supplied undrilled unless ordered with a chassis
$35.00
 
JTM45 Style face plate from Sparky
$35.00
 
Custom JTM45 Style back plate
Contact us to discuss your chassis type.
$45.00
 

Boards

MetroAmp JTM45 PTP Board
Save $$$! NOS versions of this board are available here
$30.00
M
 
New! Double Turret JTM45 PTP Board$35.00
 
New! MetroAmp JTM45 PTP Board - Perfed
Save $$$! NOS versions of this board are available here
$35.00
M
 

Mechanicals

The things you need to bolt down to get started!

3/8" Rubber Grommet
for 3/8" chassis opening, 9/32" inside diameter
$0.25
M
 
1/2" Rubber Grommet
for 1/2" chassis opening, 3/8" inside diameter
$0.35
M
 
2 Hole Solder lug
#6 internal tooth
$1.50 pkg of 10
M
 
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
 
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
 
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" gold anodidized
$2.00
M
 
Medium Can Clamp
1 3/8" clear anodized
$2.00
M
 
Medium Can Clamp
1 3/8", 1.75" mounting centers
$2.00
M
 

Chassis Mounted Capacitors - stock setup uses (1)32uf and (1)16uf

F&T Can Capacitors

F&T Dual 32uf 500v
For mains and screens
$9.95
M
 
F&T Dual 16uf 450v
For Phase Inverter
$9.95
M
 

ARS Can Capacitors

ARS 32uf/32uf Dual Can Capacitor 500v
Re-formed and ready to go
$13.00
 

Alternate Phase Inverter Cap - Optional

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 Accessories

Your 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 Resistors

You need to pick a style and get two of these!

470 ohm 5 watt Ohmite$2.00
M
 
Welwyn 470 ohm 7watt Wirewound Resistor
$1.95
 

Preamp Capacitor

F&T Axial 16uf 475v
.64" diameter x 1.55" length
$5.95
M
 
TAD 16uf 475v Axial $4.95
M
 

Coupling Capacitors

Additional 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.
Mallory .022uf 630v (yellow case)$1.00
M
 
Mallory .022uf 630v (white case)$0.75
M
Out of stock
 
Mallory .1uf 630v (yellow case)$1.25
M
 

Marshall Components Kit

The small components needed to complete the kit!

Resistors: All 1 watt and 2 watt resistors included (5 watt screen socket resistors not 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)
Diodes: (5) 1N4007
25k trimmers: (1) Vertical, (1) Horizontal
The ValveStorm version of the kit(s) substitute 1 watt Carbon Film resistors with longer leads for some of the 2 watt Metal Oxides. Provided resistors list: Kit resistor Comparison
Brands and types provided may vary depending upon availability
M
MetroAmp Kit Options
ValveStorm Kit Options

Top Hat Diodes

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
 
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
 
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$28.95
M
 

Voltage Selector - Optional

Marshall New "Modern" Voltage Selector$29.95
 
120v Amber Indicator
$9.95
M
 

Power & Standby Switches

SPST Switch
3A @250V, 6A @125V; 1/2" mounting hole.
$3.95
M
 
Marshall Chrome Toggle Ring
The more modern style with the beveled edges
See vintage style here: More info
$3.95
M
 
Marshall Chrome Toggle Ring - Rounded
More info
$3.95
M
 

FuseHolder - Internal Mount

Internal chassis mount fuseholder

Internal chassis mount fuseholder
for 1.25" x 0.25" fuses
$2.50
M
 

FuseHolder - Panel Mount

Only 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

Strain relief for SVT cord
1/2" opening
$0.50
M
 
New! Locking strain relief for SVT cord
fits 1/2" opening
$1.50
 
8 foot Power Cord, 18 AWG, 3 Conductor, Black
Bare end SVT type
$4.95
M
 
12 foot Power Cord, 18 AWG, 3 Conductor, Black
Bare end SVT type
$6.95
 

Jacks

Old Style Cliff Jack
with metal ring
Made in the UK. Not chinese knockoffs.
About "counterfeit" Cliff jacks
$2.25
M
 
Old Style Cliff Jack
with metal ring
Distributed by Cliff USA. Manufactured in Asia.
$1.95
 
New Style Cliff Jack
with plastic ring

Made in the UK. Not chinese knockoffs.
$2.25
M
 

Potentiometers - pick one

Alpha Pot Amp Set

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

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
 
820 ohm 5% - Long leads
Milspec (extra yellow stripe)
$2.00Out of Stock
 
27K ohm 5% - Long leads$1.25
 
56K ohm 5% - Long leads$1.25
 
68K ohm 5% - Long leads$1.50
 
68K ohm 5% - Long leads
MilSpec (has extra yellow stripe)
$0.75
 
100K ohm 5% - shorter leads$3.00
 
100K ohm 5% - long leads$3.00
 
270K ohm 5% - Long leads$1.50
 
1meg ohm 5% - Long leads$1.75
 
1meg ohm 5% - Short leads$1.25
 

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

Genuine Marshall
Set-screw knob pkg of 8
The price in these just went up!
$28.00
 
Set-screw knob pkg of 8
Low profile knobs(0.6") with light gold colored caps.
$11.95
M
 

Fuses

Fast Blow

.5 amp AGC - Fast Blo, HT Fuse
.25" x 1.25"
$0.65
M
 
2 amp AGC - Fast Blo, Mains Fuse (240v)
.25" x 1.25"
$0.65
 
3 amp AGC - Fast Blo, Mains Fuse (120v)
.25" x 1.25"
$0.65
M
 

Slow Blow

.5 amp AGC - Slo Blo, HT Fuse
.25" x 1.25"
$0.70
 
2 amp AGC - Slo Blo, Mains Fuse (240v)
.25" x 1.25"
$0.70
 
3 amp AGC - Slo Blo, Mains Fuse (120v)
.25" x 1.25"
$0.70
 

Chassis Mounting Bolts

Chassis Mounting Bolts. Qty.4$3.95
M
 

Tubes

Additional tube choices - click here: More Tubes

JJ 12ax7 - spiral filament $10.95
 
Valve Art KT66 - Matched Pair $63.00
 
5AR4/GZ34 Rectifier Tube - JJ $15.95
 
5AR4/GZ34 Rectifier Tube - China $15.95
 

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