Welcome to TCguitar
The new tcguitar.com — successor project on the domain that was once the online home of 20th Century Guitar Magazine. This site is a research-focused resource for dating, identifying, and valuing vintage Fender tube amplifiers, built on Greg Gagliano’s foundational research and supplemented with two and a half decades of accumulated community knowledge. Read the full story →
Quick facts about Fender amp dating
- Tube chart codes (1953–1972): Fender stamped a two-letter code on the tube chart inside the cabinet. The first letter is the year, the second the month.
- Chassis stamps (1968–1980): Silverface-era amps carry a serial number stamped directly on the chassis, with the letter prefix indicating the production batch.
- Modern letter prefixes (1990–present): A through K cover 1990–2000, K through V cover 2001–2012, W onwards starts at 2013. The second letter indicates the month.
- Pre-CBS vs CBS: The transition happened in early 1965. Control panels reading “Fender Electric Instruments” are pre-CBS; “Fender Musical Instruments” panels are CBS-era.
- Speakers and transformers: When the tube chart is missing, speaker codes (Jensen, Oxford, CTS) and transformer codes provide an independent way to date a Fender amp.
For the complete methodology, original-speaker chart, and circuit identification, see the Fender Tube Amp Serial Number Guide.
The complete Fender amp dating guide
Whether you’ve inherited a tweed Champ, picked up a blackface Deluxe Reverb at a garage sale, or are weighing whether to buy a silverface Twin Reverb that the seller claims is “all original” — the answer is in one place. Our pillar guide covers every Fender tube amp produced from 1946 through current production, with the methodology to date it confidently and the reference data to verify what you have.
👉 Start here: Fender Tube Amp Serial Number Guide
Letter-prefix decoder for modern amps. Tube chart and transformer methodology for pre-1990 vintage units. Complete original-speaker reference chart covering 34 model configurations. Circuit identification (AB763, AC568, the AB868 silverface variants). CBS-era quality issues. Current market value ranges. Eight FAQ answers to the questions everyone asks first.
If you only need a quick year estimate, the Dating Cheatsheet condenses the essentials onto one page. For the full methodology and context, the pillar above is the place.
Model-specific guides
Each Fender amp model has its own quirks, transitional years, circuit revisions, and value patterns. These detailed guides go deep on the questions that matter when you’re considering a specific amp:
Fender Princeton Reverb Guide
The most-recommended vintage Fender for home and studio use. Blackface through silverface to the modern ’65 Reissue and ’68 Custom. Original speakers, circuit variants, current values. Read the full guide →
Fender Deluxe Reverb Guide
The benchmark medium-power Fender. Includes the ’64, ’65, and ’68 Custom reissues, the Tone Master digital version, and the original blackface and silverface units. Read the full guide →
Fender Twin Reverb Guide
The classic high-headroom Fender. Blackface, silverface, reissue, and Tone Master coverage. Original Jensen and Oxford speaker references, JBL options, and current market values. Read the full guide →
Fender Vibro Champ Guide
The bedroom-volume tube amp with the famous warm breakup. Blackface, silverface, the XD digital variant, and the modern Vibro Champ Reverb. Original speakers, circuit options, condition assessment. Read the full guide →
Fender Super Champ X2 / XD Guide
Modern hybrid Fender with tube power section and digital effects. X2 versus the predecessor XD, head versus combo configurations, current market positioning. Read the full guide →
Additional model guides covering the Bassman, Champ, Super Reverb, Pro Reverb, Vibrolux Reverb, Showman, Bandmaster, Concert, Harvard, and the tweed series are in production. Get in touch via the contact page if you want to know when a specific model goes live.
The heritage
The original tcguitar.com hosted 20th Century Guitar Magazine, an American print publication that ran from 1996 through approximately 2013 covering vintage guitars and Fender tube amplifiers with a depth the broader internet has rarely matched since. The magazine ceased operations more than a decade ago. We acquired the domain in 2026 and rebuilt it as a modern resource.
The technical core of every guide on this site — tube chart codes, transformer methodology, speaker references, circuit identification — derives from the five-part Fender amp dating series Greg Gagliano, Devin Riebe, and Greg Huntington published in 20th Century Guitar Magazine between 1997 and 2000. Their research established the framework that every vintage Fender community member still uses today. Our role is to modernize that work, supplement it with community knowledge accumulated since, and give the original authors the credit they earned.
For the full background on the original magazine, the Gagliano series, and how this site relates to that history, see About TCguitar and Sources and Credits.
Editorial approach
TCguitar is operated by an independent editorial team. The site is not affiliated with Fender Musical Instruments Corporation or with the former staff of 20th Century Guitar Magazine, and we are not a vintage guitar dealer — we do not sell amps, broker private sales, or offer appraisal services.
Every dating reference, serial number table, circuit identification, and value range published here is cross-verified against the original Gagliano–Riebe–Huntington research series, modern Fender support documentation, Teagle and Sprung’s Fender Amps: The First Fifty Years, Mark Ware’s Fender Amp Field Guide, and active Reverb.com sales archives for current market values. When sources disagree, we either flag the discrepancy or hold the claim back until it can be confirmed.
Corrections and source suggestions are welcome via the contact page. For the full sourcing methodology, see Sources and Credits.
Community archives
TCguitar also maintains an archive of the Classic American Guitar Show — the Long Island vintage event the original magazine promoted from the early 2000s through the early 2010s. If you arrived at this site through old links referencing CAGS, that page is the right destination.
Ready to date your amp?
→ Open the Fender Tube Amp Serial Number Guide
Or browse the Dating Cheatsheet for the quick version.