Interesting BSR PA chassis.. came in with a number of issues and a lot of out of spec parts.. loved the aesthetic and decided to rebuild with other parts to make a 120 Watt Tiny Terror style “Big Knob” amp with a specific customer in mind.. Was a fun project and has produced a beast of an amp that can break up at low volumes when needed or can really scream loud and proud clean! Simple Gain control, tone (or rather treble cut) and master volume (Post PI). Cathodyne PI pretty Orange influenced design 2x12AX7 preamp tubes and 4x6l6GC ouput tubes.. transformers from a damaged Peavey XXX combo.. Love the style of chassis and really impressed at the total lack of hum despite everything being crammed in so close..
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- As she came in
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- No power amp tubes
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- Prea amp tubes
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- fairly neat but a lot of components out of spec and the output transformer shot…
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- Chassis all stripped except for a choke tube sockets and a few useful bits
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- Transformers from a Peavey XXX Combo ready to go in
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- Bolts holding the transformer in place
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- All fitted
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- 4x6l6GC tubes in place.. Sovteks
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- Testing out filament supply and new mains switch
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- Bias supply constructed and original tag strip in place
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- 2 holes filled for preamp tube sockets
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- Preamp tubes in place
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- Just needing wiring up…
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- HT supply wired up and Stanby swithc and HT fuse fitted
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- Love the light 😉
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- Pre amp power supply connected
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- Taking shape! The components cannot come up too high or there will be issues getting her in the case..
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- Tight packed 😉
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- Gain dual pot for first 2 gain stages
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- All done and working well!
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- Back in it’s case
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- All together
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- With younger brother…
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- Ready for the customer!
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- Can work upright too..
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- With flight case