Click to enlarge This is a fantastic Download. The Gibson GA-5  5 Watt vintage amp.

Gibson had chosen to raise the gain considerably higher then the other 5 Watt amps of the period.

These little babies are SCREAMERS!! It is a simple amp, one 12AX7, one 6V6 and one 5Y3 Rectifier tube, and a low parts count.

The amp can drive any speaker you want. From an 8 inch up to a 12 inch.

Real simple, A volume control - that's it.

I have designed the amp on the Tweed Champ circuit board and chassis making it easy to build and layout.

This download is the 1950's ORIGINAL VINTAGE AMP, not the recent reissue. Authentic to the old tone.

Your download will appear as a DOWNLOAD button on the order confirmation page.
You can also get to it, even from another computer from the ORDER STATUS PAGE.
if you have trouble, please contact us with your order # and we will send you a copy

DO741 bias notes download$4.95
final notes on web page

Dan's Legendary Book "Inside Tube Amps" is now available on Amazon/Kindle

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Torres Engineering

Sandpiper Drive

Yuba City CA 95993

this is not a "walk in" shop

I am Partially retired due to illness, but getting better!

in business 48 years