Preview: Aurora 5120 DIY Preamp & Amp PCB’Coming Soon!
The Aurora 5120 began as a request for a OG Peavey 5150 single channel preamp board.
Aurora Audio/DIYfever Mach2 Pre+ Available Today!
As announced in a previous post I have worked on a new Aurora Audio PCB based on Bancika from DIYfevers excellent MKIIC+ layout. The boards were tested and adjustments made over the last few weeks and now the new batch is here and will be available at 4:30PM today. Also coming with these boards the …
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New Aurora Audio PCB Arrivals
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 …
Aurora Audio Preamp PCB Soundclips And An Exciting DIYfever Collaboration!
I’ve had a fair few questions about how each of the Aurora Audio preamps sound. If you’ve been looking around the store you will have noticed clips popping up on some of the PCB pages. Here’s all of them in one place. I will be adding clips for the Saturn Amp set as well as …
Aurora Audio Preamp PCB Soundclips And An Exciting DIYfever Collaboration! Read More »
An update regarding Merlin Blencowe’s Ultra High Gain Preamp PCB
Since the small run I did of these boards ran out I have received a fair few questions asking if/when they would be back in stock. Originally I didn’t intend to do any more of these boards due to it being Merlin’s own design. However I reached out to Merlin and he said it was …
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12AX7 to 6N2P toggle switch guide
This post will cover the 12ax7 to 6n2p toggle switch wiring that I used recently in the Aurora Jupiter Preamp. Firstly lets cover the key difference between the two valve types. Typical 12ax7 valves wired for 6.3v AC heaters use pins 4&5 linked together for one side of the filament winding and pin 9 for …
Aurora Jupiter Guitar Preamp Build Log: Part V: The final frontier!
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 …
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New PCBs available in the store
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 …
Aurora Jupiter Guitar Preamp Build Log: Part IV
This instalment of the Aurora Jupiter preamp is a little less exciting than I planned as there isn’t really much new to see as the GEQ daughterboard covers up the focal point and the boost board I etched myself to try out the circuit. Onto the boost. This is a slightly modded zw44 to have …
Aurora Jupiter Guitar Preamp Build Log: Part III
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 …
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Aurora Jupiter Guitar Preamp Build Log: Part II
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 …