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Hit-O-Meter Added 5/18/2015
Design, Construction & Modification
Of Tube Musical Instrument Amplifiers
Eventually Laurence Amplifiers will have it's own web site.
In the meantime information will be posted here
as the amplifiers progress down the line
Below are some pictures of the Blue Bullet
100 Watt Guitar Amp Being Wired By Ian and Chuck
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The picture above shows the Power and Output Transformers
Sitting upside down for positioning and measuring
Of the mount holes and wire routing.
The 525 Volt Power Transformer
At the left has been replaced
BY a higher power 700 Volt Military Transformer!
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The picture below shows the four JJ KT88 Blue Glass Power Tubes.
The four Brown Based JAN (Joint Army Navy) Military 6SL7 tubes are gain stages!
Two more 6SL7 tubes have been added
To the original four Pre Amp stages
For a total of 11 Gain Stages.
The second half of the final 6SN7
With the Black Base
Shown at the far right
Is used as a Phase Inverter
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Below is a picture of Chuck and Ian wiring the filament lines.
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Below is a picture of the tube filament wiring.
This shows the six sockets for the military 6SL7 and 6SN7 pre amp and phase inverter tubes.
Also the four JJ KT88 Output Tubes with Blue Glass
The five 9 pin miniature tube sockets at the top
Have been eliminated in favor of six of
The more robust and rugged
6SL7 and 6SN7 Military and Industrial Tubes!
These are octal 8 pin based tubes!
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Not shown in the picture above is another
8 pin Octal socket for the 5U4 Rectifier Tube