November 15th, 2014, 1:09 pm
November 15th, 2014, 1:19 pm
November 15th, 2014, 1:31 pm
November 15th, 2014, 1:58 pm
November 16th, 2014, 11:36 am
November 16th, 2014, 1:43 pm
Guy wrote:Well, Roscoe, I'm building something but not what you mean.
I'm so far behind on my phono amp that I'm planning to build an op-amp phono amp so I can listen to music in the mean time. Suggestions accepted: I'm thinking of splitting the RIAA inversion between two gain stages and using a pair of 9V batteries as power supplies.
November 16th, 2014, 1:53 pm
November 16th, 2014, 4:18 pm
November 16th, 2014, 4:25 pm
Guy wrote:Well, Roscoe, I'm building something but not what you mean.
I'm so far behind on my phono amp that I'm planning to build an op-amp phono amp so I can listen to music in the mean time. Suggestions accepted: I'm thinking of splitting the RIAA inversion between two gain stages and using a pair of 9V batteries as power supplies.
I have ideas for a couple power amps and a power sequencer to apply and remove power from circuits, but Life keeps interfering! I'm glad that doesnt happen to anyone else!
November 16th, 2014, 6:35 pm
Roscoe Primrose wrote:Guy wrote:Well, Roscoe, I'm building something but not what you mean.
I'm so far behind on my phono amp that I'm planning to build an op-amp phono amp so I can listen to music in the mean time. Suggestions accepted: I'm thinking of splitting the RIAA inversion between two gain stages and using a pair of 9V batteries as power supplies.
You might look at this one: http://phonoclone.com/diy-pho5.html
Also, if you're going to do battery power, bite the bullet and get two 8xAA battery holders, that'll give you +/- 12V, and about 50x the battery life... If you use 9V batteries, the first time you forget and leave it on over night (but, you'd never do that, right?), you'll need to replace the batteries.
Roscoe