Dating a fender amplifier
Many of these resources refer to source-date-codes located on pots or speakers within your amplifier.Please keep in mind that those components must be original to get a valid date for a vintage guitar amplifier.Other things to look for include chasses placed in cabinets from a different year, “doctored” tube charts, non-original control plates (usually reproductions) on silverface amps, original transformer bell ends (they have correct date codes, of course) on non-original transformers, and non-original knobs (either repro or silverface knobs on blackface amps).unusual things can be found such as the empty “Pulse Adjust” hole on the rear of early ’60 brown amps, the “middle” volume control, use of tweed style grill cloth, strange non-documented transitional circuits, and changes in tolex color including the super-rare cream colored “brown” tolex that is found on some late ’60 amps. Given that people may refer to this information seeking specific production quantities of amps they are curious about, it should be pointed out that the serial numbers apply to chassis types, and not specifically to amplifier models.
and these changes are often disclosed and of a non-malicious nature.Cord length 8 feet, cord thickness is 0.29 inches (about 9/32" or 7.3mm). The power cord as used in North America only on the Blues Junior.Standard NEMA 5-15 plug for North American use at 110-120 Volts AC. EXTRA-LONG 12 ft POWER CORD, 3-WIRE, 18ga, SJT type, .250 TAB ends.Dating an amplifier by serial numbers can be effective as well.Again, it's important to be sure the parts are original on the music equipment to get a valid date for the amp.
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The knob is inserted after the bushing is in place, and hides the bushing from view. Used on later versions of the Blues Junior, and also the early version if a set-screw chicken head knob is used to replace the discontinued push-on chicken head knobs. JNUT-38 JACK NUT AND WASHER, METAL, SWITCHCRAFT, SET OF 6 Genuine Switchcraft nut and washer set for the blackface/silverface Fender bias pot, Mesa Boogie pots, and the CTS or Alpha pots with 3/8" bushing (found on original vintage Fender blackface and silverface), as well as Peavey and Switchcraft 1/4" jacks. Includes mounting hardware (two screws and T-nuts). Individual screw, bronze 6-32, 1 1/2 inches long, Phillips and matching 6-32 Keps Nut with integral washer.