Urban Tube Conversion Amp Schematic.

Components and design layout subject to change without notice.

300V

NOTE:
See Video

+
15K
1W 47uF 82K 100K 6360 1/2 Plate lead reversal will
In from + 20V supply on 2.4K 14.6V 450V cause " Motorboating"
solid state board .1uF BLU
6 if feedback connected.

+
2200uF 7 GRN 8 Impedance Switch
10K T1
25V 1 2
6J6 .1uF 220K 2 * YEL 4
RED
See Video 10.5K 6 5
.047 .1uF 220K 2 BLK
Audio C58 7 7
Signal In 2N3904
+ 3
100uF 7
453K 470 453K
35V 8
To solid state 560 100 BRN Bias jack on
amplifier AC
input. 82uF
13.3K
6360 1/2
* rear chassis.

T2 450V FB 1N5408
X2 Not Used

+
F1
See Video NC D S 200V
100 .047uF STF4N90K5
NC
1N5408 X4 630V G
120V 355V
100 10Vz
Wired for 120V. See 1N4007 Out
transformer data - 75V 100K - 22V
sheet for wiring. 50K
.47 In Adj

+
120V 630V
**
22uF
Neg Bias Adjust
22uF LR8
2K 1uF
450V
.047uF
630V

36K 450V 450V

+

+
2W 10K
330K

6J6 6360
Grounded to specific
point mentioned in video.

3 4 9 4 5 9 This schematic is for reference only! ** Set Bias for 25-30mA

"Maximum"

Filament connection 6.3V

WARNING! All Voltages measured with amplifier
properly biased, and at idle.
This schematic involves working with High Voltage. If you
build this schematic, you are doing so at your own risk!
This Schematic is NOT PUBLIC DOMAIN.
This schematic is property of Mr Carlson's Lab and is to remain on Patreon.