Digital attenuator, 6 relay input selector, RCA panel, all one unit

[maxw]

3x PCBs, fully assembled and tested, selling as a single unit.

Nice purple PCBs from OSHPark with ENIG (Electroless Nickel Immersion Gold) finish.

Input Selector

• 6x inputs
• Mute for the output
• SPI controlled, easy to implement
• Uses latching relays so no constant current draw (mute is not latching, obviously)
• Uses high quality Panasonic GQ relays (AGQ)

RCA Board

• 6 inputs, 1 output
• CMC 816 RCA sockets soldered onto PCB. They are now tarnished compared to these photos. A quick polish will make them like new.

MDAC Attenuator

• 65536 linear steps (16bit)
• Gain is 4x
• AD8599 with panasonic metal film resistors
• Excellent performance
• Can drive headphones
• Compact
• Identical design to the one used in my preamp. Details, measurements etc are here.
• SPI controlled, easy to implement

BoMs, arduino code, PCB layouts and schematics are all here:
GitHub - FutureSharks/preamp-two at 1.0

And python code is here:
GitHub - FutureSharks/preamp-two: An digitally controlled hi fi preamplifier 🔈🎵


160 EUR + postage

 

[maxw]

Bump 140 EUR

 

[maxw]

Bump.

The attenuator also has Panasonic FP caps.

130 EUR

 

[maxw]

Bump 110 including EU postage

 

[maxw]

Bump. 95 EUR including EU postage

 

[hirscwi]

I'd like to buy this if you'll ship to the US. PM sent.

 

[maxw]

I'd like to buy this if you'll ship to the US. PM sent.

Happy to post to US. You have first dibs.

 

[maxw]

Sold