Schematic London City DEA 100/130
This is an English summary of information that widely available on the web in Dutch. Here are some links:
http://www.gitaarnet.nl/archive/index.php/t-171959.html
https://www.nvhr.nl/brands/LondonCity.htm
https://www.nvhr.nl/frameset.htm?https: ... ntentFrame
In the early 70's there was a record store owner in Amsterdam, Jan De Waal, who already imported Vox amps into the Netherlands, and was asked to provide Marshall amplifiers. Now, in typical Dutch fashion, Jan thought them to be a bit expensive for what they were and decided to contact a local electronics repairman and musician Piet van Schaaf to build him some Marshall clones under the brand name London City, which De Waal had trademarked. The head shells were constructed by Vic van de Kuij who, after a few years, took over when Van Schaaf wanted out. Van de Kuij then employed girl who would solder up the chassis according to a big layout example taped to the wall... Van Schaaf went on to build amplifiers under the name of FANE, and some of the London City were marketing under still different names.
This is Van Schaaf's copy of the Marshall schematic he started out with, the layout he designed and a handwritten parts list
I bought one a while back, not 'not working' but then again, also not working as it should. Very con-FUSING repair. The stock fuse holder indicated 2A and nothing else, suggesting it was the mains fuse, leading to confusion on the values by previous owners. Stock of the shelf JJ EL34's are a recipe for disaster in 100W Marshall type topologies, they do sell EL34L's which are suited. First filter cap was completely toast after running it with a faulty tube and a massive fuse. All filter caps were replaced by new Tube Amp Doctor shizzlenizzle caps...
The presence, mid and treble controls in this amp all had 1M pot, completely compromising the performance of the amp. Loose pots and ungrounded input jacks were fixed, leaky coupling caps replaced. Cathode resistor and bypass capacitor on the power tubes replaced. Mains fuse mounted on the chassis.
Demo tracks were recorded in Garageband, using Captor and Cabinet Simulation software, but running the amp at 85% gain.
There are quite a few of these amp around here in the Low Countries, and prices aren't that spectacular. A simple retube for this amp with somewhat decent tubes would be just under €200... you could almost buy a second hand Boss Katana for that kind of money.
London City - DEA 100 130 Marshall clone [schematic]
- modman
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- Dr Tony Balls
- Diode Debunker
Amusing that's essentially how Marshall came to be but making Bassman clones!
- modman
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Dr Tony Balls wrote: ↑12 Nov 2021, 15:13Amusing that's essentially how Marshall came to be but making Bassman clones!
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