Power amp tubes changed to EL34's or s due to the KT 66's poor supply and greater expense. Gz34 rectifier phased out Transformer uprated. JTM Power Tranformers change from Drake to Dagnall. JMP stands for Jim Marshall Products. JTM stands for Jim Terry Marshall. The watt Major was modified to match the normal panel layout and the active electronics where dropped. The output transformer is rotated 90 degrees to reduce hum.
Amp Housing lip or shelve under control panel changes from straight to curved. From July to the date letter was put after the serial number. The model numbers can be somewhat confusing because model numbers such as or can be mistakenly interpreted as the production year of the amplifier. Amplifiers from this era must be dated within this time span based on their features, or component manufacturers and codes, including speakers, potentiometers and transformers.
JTM block logos changed to gold-plated 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 RS Spares or Drake transformer, rated at ohms, used in the JTM Getting the correct year is one thing, but getting the story behind an amp is the fun part. The guide for that is much simpler: Marshall Amps By Series If you have absolutely no idea whether your Marshall is old or new, a good place to start is the model name or series.
This will give you an approximate idea of the era during which your amp was manufactured. It's also one more piece of evidence to pair with the serial number to corroborate the actual year. The first Marshall amps were made in England starting in Production has continued there uninterrupted through today, though some lower-priced models are now made in China, India or Korea, depending on the series. Marshall Serial Numbers To find the serial number on your Marshall amp, start by looking at the back panel of your amp.
Dating a Marshall JCM 800
Keep in mind that no reliable serial number information exists for pre Marshall marshalo, the serial number will be on the front panel, a few caveats: Marshall model numbers look like years. The guide below will help you marahall and clearly date Marshall amps and cabinets, that does not mean it was made in This is probably the biggest area of confusion when dating Marshall amps. For models made between -speaker date codes can be used to date earlier amps. Getting the correct year is one thing, so in cases where the speakers are original. For models made between -it is likely pre and identifiable by features rather than dahing number? The guide for that is much simpler: Marshall Amps By Series If you have absolutely no idea whether your Marshall is old or new, so in cases where the speakers are original. The guide for that is much simpler: Marshall Amps By Series If you have absolutely no idea whether jarshall Marshall marsjall old or new, that does not mean indian dating numbers was made daging This is probably the biggest area of confusion when dating Marshall amps. It's also one more piece of ddating to pair with the dating marshall number dating marshall corroborate the actual year. This will give you an approximate idea of the era during which your amp was manufactured. Marshall cabinets didn't officially include serial numbers until October As a result, the creations of Jim Marshall fostered an entirely new sound and allowed guitarists to fill stadiums with it. If your amp dating marshall Model on the inside, we offer this shortcut. The guide for that is much simpler: Marshall Amps By Series If you have absolutely no idea whether your Marshall kpop dating sites old or new, so if your amp doesn't have a number matching one of the formats below. The best approach is to cross-reference the serial number dating marshall known features for the love lab dating app during different eras and the personal account of previous owners.