Webcor 14X275 1 K Amplifier

By:

Michael R. Stiteler

Mike@Stiteler.net

• Photos

• Wiring Diagram/Parts List

• Schematic

$29.99 Amp!Webcor reel to reel amplifier. Purchased for $25

$29.99 Amp!Now officially a guitar amplifier, after adding a freakishlypowerful 140 Watt Technics Speaker (purchased for $4.99 at thrift store). Amp produces about 10 watts.

I use my “JamPlug” as a preamp, as this amp needs larger signal than pickups produce. If you count the JamPlug, the amp cost about $80.

I can turn the guitar signal all the way up, JamPlug signal down, and get a beautiful overdriven distortion…classic tube sound!

RMC.01

1400V

115Vac

253V500V

253V

A

B

6.3Vac

270k 1/2W

270 2W

22k 1/2W

X5FRMC

JL.00120%

1000

5W

10%

T1

0.05 µf 400V0.05

µf 4

00V

T2

2.7k 1/4W

220k 1/2W

4.7k 1/4W

4.7k 1/4W

220k 1/2W

• 5 Caps (1 = multi-section 3x40 µf )• 0.01 µf, 1400V (ceramic)• 0.001 µf, 400V? (ceramic)• 2 x 0.05 µf 400V• 3 x 40 µf (400V, 350V, 25V) Electrolytic(multi-section canister)

• 2 Transformers• 1 Power Transformer (T1)• 1 Audio Transformer (T2)

• 4 tubes• 1 x 5Y3• 1 x 12AU7 (12AX7 used for my amp)• 2 x 12AB5

• 9 Resistors (1 Ceramic, 8 Carbon); all 10%, 0.5W unless noted• 1000 5W Ceramic• 270 2W• 270k• 22k

• 2 x 220k• 2 x 4.7k 1/4W• 2.7k 1/4W

40 µf400V

40 µf350V

40 µf25V C

12AB5

12AB5

12AU75Y3

Schematic of Similar Amp