1959 National Valco Chicagoan Model 1220 DEMO *KILLER OVERDRIVE!*

2,004 views · Published 23 May 2013 · 4:01 · Indexed 29 September 2026

Channel: The Guitologist · 2013 · Music

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Here is my slightly modified National Chicagoan guitar amp... This is the same amp as the Supro 1600R. It originally had 6973 tubes ffor power. It's been modded to accept EL84 tubes, while the rectifier has a plug-in solid state rectifier in place of the rectifier tube. The speaker is a vintage 1960 Jensen Concert Series DP AlNiCo 5.

This thing will blow you away with its creamy tube saturation. The low efficiency Jensen is ideal for early breakup.

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