Ampeg 720-SN schematic needed

[Bishop]

Not sure if I'm missing something or maybe it has a name that I am not aware of, but I can't find the schematic for this amp on the web. Does it exist? It's quite a difficult amp to trace due to the layout.

[DrGonz78]

Well a quick search turned up the model name Jupiter II 720SN. Still no schematic info to be found but is this the same amp in this lisiting?
https://reverb.com/item/4041215-ampe...om-flair-tolex

[Jazz P Bass]

That amp had two preamps I think.
The power amp may be the same as the Dolphin.

Aside: I couldn't resist.
Jupiter II was the name of the Spacecraft in "Lost In Space".



That show was a hoot.

Danger! Danger! Will Robinson.

[Bishop]

Well a quick search turned up the model name Jupiter II 720SN. Still no schematic info to be found but is this the same amp in this lisiting?
https://reverb.com/item/4041215-ampe...om-flair-tolex

That's the amp.

There's no schematic in the back panel unfortunately.

Pretty big bummer as it is a beautifully done amp, but I don't know if I have the time/patience to trace through it.

The main issue appears to be in the preamp.

[g1]

No luck with any Ampeg schematic showing EF86.