Gibson 1951 GA-20 Vintage Guitar Amp, Excellent

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This Gibson 1951 GA-20 in brown is in excellent condition. Cosmetically, it is a time capsule.  While it isn't a barn burner like a tweed Deluxe, it does have its own, old-school tone and would pair beautifully with early Gibson archtops, Goldtops, etc.

This GA-20 is a 12 to 16-watt amp with no onboard effects. It has had a cap job and a grounded power cable upgrade. The chassis, potentiometers, knobs, leather handle, vinyl covering and grille are original, with the chassis and grille in excellent condition.  All the tubes were tested to make sure they're good to go.  

The 12" Jensen P12R speaker is original, with the cone original and the speaker in very good condition. The cabinet separated at the top panel seams, requiring some reinforcement, which I did with hide glue and patient clamping.  It is incredibly sturdy now. The original cover is included in very good condition, along with the original shipping paper - the brown paper in the back of the amp, which I have found very rarely in old Gibson guitar cases and amps.

SPECIFICATIONS

• Date: 1951
• Where Is Date Noted?: serial#, codes
• Weight: 22 lbs 2 oz
• Dimensions: W 20" x H 16.25" x D 7.5"
• Watts: 12-16 watts
• Case/Cover?: yes
• Case/Cover Original?: yes
• Case/Cover Condition: very good
• Covering Material: vinyl
• Covering Color: brown
• Covering Original?: yes
• Cabinet Material: lightweight pine
• Cabinet Condition: very good
• Cabinet Repairs/Changes: yes
• Cabinet Original?: yes
• Grille Style: golden brown weave
• Grille Condition: excellent
• Grille Original?: yes
• Baffle Material: plywood
• Baffle Condition: very good
• Baffle Original?: yes
• Baffle Repairs/Changes: none
• Chassis Material: metal
• Chassis Condition: excellent
• Chassis Original?: yes
• Chassis Repairs/Changes: none
• Knobs Original?: yes
• Handle Material: leather
• Handle Original?: yes
• Speaker 1 Brand: Jensen P12R
• Speaker 1 Size: 12"
• Speaker 1 Manufacturer Code: 220
• Speaker 1 Date Code: 118
• Speaker Cone Code: 1880 1
• Speaker 1 Cone Original?: yes
• Speaker 1 Condition: very good
• Speaker 1 Original?: yes
• Power Transformer Manufacturer: Magnetic Components
• Power Transformer Manufacturer Code: 166
• Power Transformer Date Code: 117
• Power Transformer Original?: yes
• Output Transformer Manufacturer: ?
• Output Transformer Original?: yes
• Reverb, Tremolo Or Vibrato Onboard: no
• Rectifier Tube: 5Y3
• Rectifier Tube Brand: RCA
• Power Tubes: 2 x 6V6
• Power Tube Brand: Sylvania
• Preamp Tubes: 6SL7, 6SJ7, 6SJ7
• Preamp Tube Brand: Sylvania, RCA, RCA
• Potentiometers Original?: yes
• Filter Caps: replaced
• Internal Repairs: cap job
• Power Cable: grounded upgrade
• Accessories Included: original shipping paper
• Documentation: none
• Smells?: none

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