How does this idea grab the community?
I am in the process of designing a new tube vari-mu as a fundraiser for the Forum.
I have got so much out of this place and met so many great guys that I want to put something back.
The idea is this, it will be low cost but high spec i.e. fast but will be made unconventionally from little used tubes that must cost $3 or thereabouts each.
Anyone who builds it or copies the schematic is on their honour to donate the cost of a tube to the forum, say $3. I will hand over the rights to the circuit to the Forum, anyone who contributes to the design will do the same.
This is not going to be a clone but a new take on some old ideas. For example, the front end will not be a transformer but a tube PI, the cap charging issue will be avoided. It will be designed to work with any mic pre that can dish out a volt into a high impedance. The output stage will use a toroidal mains TX costing about $15 and put out 20~30Vac into 600 ohms. It should have an attack of a few mS.
Anyway, thats the drift, over to you!
best
DaveP
I am in the process of designing a new tube vari-mu as a fundraiser for the Forum.
I have got so much out of this place and met so many great guys that I want to put something back.
The idea is this, it will be low cost but high spec i.e. fast but will be made unconventionally from little used tubes that must cost $3 or thereabouts each.
Anyone who builds it or copies the schematic is on their honour to donate the cost of a tube to the forum, say $3. I will hand over the rights to the circuit to the Forum, anyone who contributes to the design will do the same.
This is not going to be a clone but a new take on some old ideas. For example, the front end will not be a transformer but a tube PI, the cap charging issue will be avoided. It will be designed to work with any mic pre that can dish out a volt into a high impedance. The output stage will use a toroidal mains TX costing about $15 and put out 20~30Vac into 600 ohms. It should have an attack of a few mS.
Anyway, thats the drift, over to you!
best
DaveP