Driver PCB schematic, 9100-60-02 Issue 6 (Marshall, 1996). It was one of the first all transistor Marshall combo's. Early 4210's were fitted with a Celestion G12-80 T3103 15Ω speaker.

If you have any material you'd like to PSU and power amp schematic, Issue 2 (Marshall, 1988). Photograph of a JMP 2195 on a JMP 2196 cabinet.

The JCM800 Split Channel amps were introduced a year later in 1982. Pre amp schematic with 2x ECC83, JMP52-02 Issue 10 (Marshall, 1993). (Photograph courtesy Joe Pampel of Obsolete Electronics). var suffix = ''; Component numbers on the schematic and layout match.

See the Marshall Amps TSL page for more "official" information on the JCM2000 TSL amps. The 8222 cabinet was fitted with two Celestion G12-T100 speakers and is switchable between mono and stereo operation.

Pre amp schematic part A, 7400-60-0A Issue 4, (Marshall, 1994). In the brochures they were called Artist, but the panels on the amps show Artiste. In 1982, the 20th anniversary of Marshall Amps, some of the JCM800 amps were issued in neat white vinyl. Note that the typical 100pF bright cap wasn't fitted on the earliest models. These high power Lead 1982 cabinets were made for the 2000 Lead head. In these early years the amps, their features and especially the cosmetics varied a lot. It was fitted with a Celestion 15" S15-250 T4021 8Ω 250W SideWinder speaker. Photograph of a 3203 head. Pre amp & power amp schematic, JCM6-61-02 issue 2, (Marshall, 1997). In this case, you can sort of think of this stack as a two-stage filter. These mini stack cabinets were fitted with two Celestion G12 Vintage speakers. The VS65R was fitted with a 12" Marshall Gold Back speaker, probably an Eminence speaker. The 6101 combo was fitted with a special Celestion G12-Gold S303 8Ω 200W speaker. This is a two channel amp, one channel is that of an 1987 Lead amp and the other channel is that of an 1986 Bass amp. The first JTM45 amps had no model number printed on them.

In this post, we will be looking at the variations of the tone stack circuitry in Marshall’s early product lines. Allthough these bass amps are solid state amps, they are still part of the Marshall amps story. These cabinets originally were fitted with two 12" Celestion speakers. The 5150 is the combo version of the 3315 head. Their first amps were very heavily "inspired" on the 1959 Fender Tweed 4x10" Bassman. It has 4 channels. The styling was changed to more modern standards though. The US distributor at that time (Unicord Inc.) decided to switch to 6550 output tubes in favor of the EL34's. The 2000 Lead and 2001 Bass heads are probably the loudest and most powerfull Marshall tube amps ever built. The 5100 is the combo version of the 3310 head. document.write( addy_text42311 ); Power amp & PSU schematics with 1x ECC83 & 4x 5881, 4100-60-02 Issue 14 (Marshall, 2002). 9200 wiring & output schematic, 9200-65-02 Issue 5 (Marshall, 1994). The solid state amps didn't have JCM800 printed on their panels.

While the basic tone stack topology is relatively common throughout the Marshall lineage, each vintage has its own characteristics that make it work with their corresponding design changes. Having been finally freed from the 15 year exclusive Rose Morris distribution contract, Marshall launched the new JCM800 serie early in 1981. Amp schematic with 3x ECC83 & 2x KT77/EL34 (2x 6550 US) (Marshall, 1981). The output of that filter cascades into the (relatively complicated!) It was fitted with a Rola Celestion G12-65 T3054 15Ω speaker. An interesting take-away from that observation is that the Treble response is slightly based on the position of VR8, i.e. The 9100 and the 9200 are the successors of the original 9005 amp. Amp schematic with 4x ECC83 & 4x KT66 (Marshall). This e-mail address is being protected from spambots. It was fitted with two Celestion T3896 G12 Vintage 8Ω speakers. There was also a power switch and a standby switch with a power indicator. var path = 'hr' + 'ef' + '='; This increased power handling was probably due to the four Celestion ceramic speakers fitted in these cabinets. Amp schematic with 4x ECC83 & 2x EL34, 70-21-11 (Unicord, 1970). 3510 preamp schematic, Issue 4 (Marshall, 1988). The only difference is that the 1Meg Bass potentiometer has been swapped for 220k, as seen in Figure 5a. Marshall switched to Sovtek 5881 tubes. Early 2104's were fitted with two Celestion G12-65 15Ω T3054 speakers, later 2104's were fitted with two Celestion G12-65 15Ω T3120 speakers. Later (in 1967) a smaller 2,5" power transformer was used giving a B+ of around 460V. Thanx to Richard Hinton. var attribs = ''; These amps were introduced in april 1978 and were discontinued in 1982. These amps used two EL84 tubes in the power amp, three ECC83's in the pre amp and an EZ81 rectifier in the power supply. Originally these amps were fitted with Tesla EL34's, but late 1993 Marshall switched to 5881 tubes. The 4501 was introduced in 1990 and discontinued in 1999. These cabinets originally were fitted with four high power 12" Celestion speakers. In the years to follow these cabinets were produced in the usual black vinyl. Only a couple of hundred of these amps were manufactured. After passing through the first filter, the signal is then fed directly into another passive filter which shares a similar shelving effect, only this time in the treble frequencies. The 4203 is the combo version of the 3203 head. Viewing this brief history of the Marshall amps, several era's can be distinguished: Although this division is not entirely accurate, it does give a good impression of the different era's. Not many people actually use this "feature" as the sound in triode half power mode isn't as desirable as it is in pentode full power mode. The 1992 standard edition amps were produced in blue vinyl. It was meant for lead, bass and organ use. Locate the .68uf cap (C1) which is found on V1A and replace it with a .47uf cap.

Late 1965 or early 1966 the ceramic speakers were replacing the alnico's. These amps were available in a black and red covering. The schematics suggest they are, but you won't find JCM800 printed on the amps. The JTM60 head was introduced in 1996. This amp was in production from 1965 to 1966. This was the combo version of the 2098 Master Lead head. 5506 schematic, Issue 5 (Marshall, 1988). .

These combo's were fitted with a Marshall labelled Celestion G12 Heritage T4612 16Ω (S403) speaker. //--> They were in production up to 1974.

Photograph of a Reverb 75. var suffix = ''; You need JavaScript enabled to view it Photograph courtesy of Nils Hörnfalk.

These 1960AV style cabinets were fitted with four Celestion T3896 G12 Vintage speakers. This will increase the gain a little. R.I.P. The Integrated Bass System (IBS) range was launched in 1985. So the JTM50 amps were in production for less than a year from 1966 to 1967. Complete circuit diagram (2 pages), DL20-60-02 Issue 5, (Marshall, 1999). They were introduced in 1993. Preamp Ch.A schematic, Issue 5 (Marshall, 1989).

In July 1969 Marshall dropped the Plexi face plates and switched to the gold colored brushed aluminium metal face plates as we know them still today. It used a Celestion 12" PowerCell speaker. Owners manual for the 4210 (3.8MB). They were fitted with two Celestion G12T-75 16Ω speakers. User manual for Transistor Split Channel models: 3310, 3315, 5100 & 5150 (538kB). 4140 & 4145 amp schematic with 5x ECC83 & 4x 6550 (Marshall, 1981). It was originally fitted with a Celestion G12-65 15Ω speaker. Thanks for tuning in!

These amps have 3 channels (Clean, Crunch and Lead), which are MIDI switchable. It was an all transistor amp. This combo was fitted with two 12" 16Ω speakers. var addy7287 = 'tabreaux' + '@';

var prefix = 'mailto:'; The JCM800 range is split into the Lead amps (this section) the Bass amps and the solid state amps. The 2500 was introduced in 1990 and discontinued in 1992. This amp was in production from 1967 up to 1975. This amp was in production from 1967 up to 1981. This amp was in production from 1973 up to 1978. These amps use 4x ECC83 and 4x EL34 tubes. Pre amp PCB schematic, JTM3-60-02 Issue 4, (Marshall, 1995). It's a 4 input, 2 channel amp featuring a tremolo. These amps use 4x ECC83 and 2x EL34 tubes. The 4100 was introduced in 1990 and discontinued in 1999.

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