dirty1_1garry
Well-known member
Hi folk,
want to show you two devices that I've built two weeks ago.
[
The basic idea is to get microphone preamps with direct outputs and silent mutes with onboard mixer and reamp output with per-channel sends for feeding guitars effects/amps. And yes, it's all in the stompbox form factor for live performance on the stage!)
Circuitry preamp section inspired by 312 with a couple minor changes. Input transformers - EA2622 (Thanks Jeff Steiger for supplies!). 2520 opamp based on gar2520. As it rather difficult to fit output transformer in to the size of enclosure, I used that1646 as output bal buffers. Gain is changed by rotary switch. Slow start phantom power supply. In order to avoid clicks mute function is made on the relay with led indicator. Effects sends with pre/post mute. For visual control of the output volume - 5 segment signal led indicator on LM3915.
Circuitry summation based on 325 amp. Summing section has balanced line out or unbal guitar level out that inspired by NYD reamp schematic and use matching transformer.
The power supply is external for each devices.
here is block dia:
want to show you two devices that I've built two weeks ago.
[
The basic idea is to get microphone preamps with direct outputs and silent mutes with onboard mixer and reamp output with per-channel sends for feeding guitars effects/amps. And yes, it's all in the stompbox form factor for live performance on the stage!)
Circuitry preamp section inspired by 312 with a couple minor changes. Input transformers - EA2622 (Thanks Jeff Steiger for supplies!). 2520 opamp based on gar2520. As it rather difficult to fit output transformer in to the size of enclosure, I used that1646 as output bal buffers. Gain is changed by rotary switch. Slow start phantom power supply. In order to avoid clicks mute function is made on the relay with led indicator. Effects sends with pre/post mute. For visual control of the output volume - 5 segment signal led indicator on LM3915.
Circuitry summation based on 325 amp. Summing section has balanced line out or unbal guitar level out that inspired by NYD reamp schematic and use matching transformer.
The power supply is external for each devices.
here is block dia: