It took a little while longer to get around to posting part II of the Osiris Preamp build log and I didn’t take anywhere near as many photos as I intended as the build was somewhat rushed so this will just be a short collection of photographs. I still have to wire up the bright …
Here is a good overview demo of the Aurora Audio Jupiter preamp by Matt @ Numbskull Audio Production.
A short while back I was talking with a friend who brought up the Marshall DSL1. This got me looking into the amp and realising that they have a lot of modding potential. The first place I will be focusing on is the tone stack as it is very ineffective stock and the mids are …
Mod project – Marshall DSL1 Mods. Updated 14/04/2023 Read More »
This isn’t a full build log like the Jupiter one but more of on overview of the Aurora Audio 5120 build process. All boards used in this build are available in the store. First up this amp is only single channel by design and puts out roughly 20w from a push pull pair of 6V6. …
The Aurora 5120 began as a request for a OG Peavey 5150 single channel preamp board.
Just a quick one. To showcase a few new Aurora Audio PCB. Merlin Blencowes Ultra High Gain preamp PCB is now back in stock with some very minor changes. First the mid control wiring has been corrected (it was reversed on the original) and the silkscreen has been adjusted ever so slightly. Other than that …
This one took a little longer than I wanted but hey life gets in the way! A very small final step in the completion of the Jupiter preamp. The DI (dry) guitar output. Essentially what is happening is the input of the DI board is tapped directly from the input jack as can be seen …
Aurora Jupiter Guitar Preamp Build Log: Part V: The final frontier! Read More »
Just a quick update following on from the Jupiter preamp build logs. The Jupiter Preamp PCB is now available to purchase this is based on the lead channel of the legendary SLO and demos will be following shortly. This Saturn PCB Set is to build a 2ch full amp version of the above. This one …
This is the one where it actually starts to get interesting for most people. It LIVES! After some initial voltage testing and a shocking first start-up where a high gain preamp could only produce shimmering cleans we finally start moving. The clean issue above was due to the shielded cable on the gain pot shorting …
Aurora Jupiter Guitar Preamp Build Log: Part III Read More »
This second installation of the Aurora Jupiter Preamp build log is just a brief one! The main part is that the filament wiring has been done. It is much easier to remove the bracket from the chassis to do this. I opted to experiment a little this time and used a Dpdt switch to be …
This is something that I have been meaning to get around to doing for a while as this board is the replacement for the original Single Channel valve preamp PCB. Not only that this is testing the Rack Preamp Chassis fit. I had a day off work today so I got cracking on this. So …
