minerva: 452; Minerphon

I notice there are two variants of this model - one has 5 valves ( 2 x ECH21, EBL21, AZ21, EM4) -the other has six valves ( ECH21, 2 x EF22, EBL21, AZ21, EM4) the circuit diagram shown for this model is the 5 valve variant whereas the valve line-up shows the six valve version.   The six valve verison has a larger physical cabinet (and was much more expensive when launched).   I am working on this larger verison but cannot find a correct circuit diagram.   If anyone knows where such a diagram might be found it would be very helpful for me.

Many thanks, John

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Hallo John,

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Thanks you Wolfgang,

Here are some photos.   Also details of the restore work are on my YouTube channel (Zone1242).  The set is now wokring but I would love to find a correct diagram to complete more detailed work on the set.

Best Regards,  John

• Minerva 452 Suisse. (135 KB)
• DSC_0005_331DSC_0005s (167 KB)
• DSC_0003_330DSC_0003s (150 KB)
• DSC_0001_329DSC_0001s (156 KB)

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Hello John,

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