Dating a Marshall amplifier can be a daunting task for even the most savvy of suitors — Amp Archives is here to help. The earliest Marshall amplifiers were made in and had no model or serial numbers. From until Marshall amplifiers were identified by a four-digit sequential number inside the back panel, reportedly starting with in and reaching at the beginning of Beginning in Marshall abandoned the four-digit numbering system and began using model numbers, sometimes called series numbers and model codes.
Dating a Marshall amplifier can be a daunting task for even the most savvy of suitors — Amp Archives is here to help. The earliest Marshall amplifiers were made in and had no model or serial numbers. From until Dating marshall amps serial number LFI Movie amplifiers were identified by a four-digit sequential number inside the back panel, reportedly starting with in and reaching at the beginning of Beginning in Marshall abandoned the four-digit numbering system and began using model numbers, sometimes called series numbers and model codes.
While there are serial-like numbers during this era, no standard serial number format has marshalo identified. The model maarshall can be somewhat confusing because model numbers such as or can be mistakenly interpreted as the production year of the amplifier.
Amplifiers from this marshalp must be dated within this time span based on their features, or component manufacturers and codes, including speakers, potentiometers and transformers. The model xmps takes the form of four-digits preceded or followed by letter codes describing amplifiers characteristics.
The table below outlines the meaning of these letter codes. The full marsha,l of these amps was initially comprised of a model code, the serial production number serixl the date code. Letters were used as date codes to represent the year of production Dating marshall amps serial number LFI Movie this letter followed nimber serial production number. Letters B, I, O and Q were Best free christian online dating sites online dating cape town south africa Metal and Metal Compoun used to avoid confusing letters with numbers.
Starting in the date code letter was moved from the end to the middle of the production code, between the model nukber and the production number. In October of Marshall began using stickers printed with serial numbers and bar codes.
These were comprised of nine digits in the format of xx-xxxxx-xx though not Datong. These serial numbers can be decoded as follows:. In August Dating marshall amps serial number LFI Movie Marshall switched to their current serial number format which contains more information and is easily decoded. These are printed seial a sticker and affixed to the back of the amplifier and are comprised of a letter followed by ten numbers followed by another letter: Checking against other amps from the era as well as component markings speakers, potentiometers, transformers serail help to confirm a year of production.
You must be logged in to post a comment. Marshall amplifier serial numbers made simple Posted on April 25, April 27, by Phil by Phil. JTM block logos changed to seerial plastic script, these are fragile and many have been replaced. Cabinet feet are small round and gray. Handles changed to plastic with larger end cap. Power tubes are KT66, 6L6 and Dating marshall amps serial number LFI Movie Single W Drake transformer, rated at ohms, part numberfor W models.
Single 50W Drake output transformers rated at 3, ohms, part numberfor 50W models. GZ34 rectifier no longer used. Cabinets have corner-lock joints with a quality control signature inside. Gold Plexigas back panel, changed from cream-colored.
Dagnall transformers used in the Dating marshall amps serial number LFI Movie, changed from Drake. Chassis construction transitions from aluminum to steel in late First Watt Majors appeared, with treble, bass and volume controls, active tone circuitry and KT88 tubes. The watt Major was modified to match the normal panel layout and the active electronics where dropped.
The output transformer turned 90 degrees in comparison to earlier models to reduce hum. Larger black cabinet feet starting in Julychanged from small and gray. Welcome Dumble Amplifiers to the Amp Archives. Leave a Comment Cancel reply You must be logged in to post a comment.
Marshall amplifier serial numbers made simple
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