Remotes

[soundude]

larry see if you like this, if you want I can do with less materials.[attachment=3:24h07mpp]Passive Preamp.jpg
revised drawing
[attachment=0]Passive Preamp v3.jpg[/attachment:24h07mpp]

 

[speakerman1]

I was reading. Will all components have enough power to use a passive? That is cool. I don't need a phono I have an amp for it. Thank you. I can even read the schematic. LOL No noise AC involved. Cool

Larry

 

[soundude]

Larry your phono amp still needs attenuation throught the preamp, how would you control the level output. The output of your phono amp will go into one of the inputs so you can control the volume.
go with v3.
all of these parts can be had at your local radio shack, you will need to make the enclosure for it though, i suggest red oak or MDF veenered with red oak...should of got the old PL knobs so you could used on you new preamp build.

 

[speakerman1]

I don't have any old PL knobs. LOL Here is where I shop. It just takes me longer to get things. LOL

http://www.ebay.com/itm/190623458991?_t ... 97.c0.m619

Larry

 

[soundude]

Did you try goldpoint direct?
Ask Lee what the part number is for the antique electronics knobs.

 

[speakerman1]

This is them they are out of Cali. I can get a case made by the same guy who built the other pre. If I don't go with wood.

Larry

 

[soundude]

who made the case? Spire Audio? Fred...

 

[speakerman1]

I don't remember but I will find out.

Larrt

 

[laatsch55]

The part number for the knobs on the SP-12 Larrt are P-K312.

 

[Gepetto]

John
You should probably leave the center position on the play-mute-record switch open rather than grounded. The way it is configured now, it shorts out the source to ground which is probably not your intent. You have a 47K pulldown on the output RCA jack which will serve as your mute ground when the switch is in the center position.

 

[soundude]

Joe ur right, was thinking to close the loop of the output of the source not realizing the pot keeps the resistance to ground on it anyway.
Here is the revision for you Larry.
[attachment=0:2yuaw88g]Passive Preamp v3.jpg[/attachment:2yuaw88g]

 

[speakerman1]

Cool. I have the feet, wire, and RCAs. May build some of it out pf wood. Do you know anyone who could engrave the wood and paint the engraving black?

Larry

 

[soundude]

You can use plexi glass or acrylic and tape or stick letters on the backside then paint the back of the plexi and peel off the letters and intall a blue led behind it, kinda like the 700B PL...
I think I'm gonna build one too, going to do birch or oak knobs. Kinda like I did these acyrlic knobs and switch plate, they glow blue when the amps on.[attachment=1:efcn07e4]acrylic knobs 003.jpg[/attachment:efcn07e4][attachment=0:efcn07e4]acrylic knobs 002.jpg[/attachment:efcn07e4]

 

[speakerman1]

Nice work.

Larry

 

[soundude]

do you have hole saws and drillpress?

 

[speakerman1]

I have some holes saws. No drill press. I can run a drill though. Working sheet metal. I wish I had a penny for every hole I have drilled. LOL

Larry

 

[soundude]

Yeh me too, only not that kinda hole I like to be drilling...LOL, anyway drillpress is key for a straight knob...if you know what size knobs you like to use and I can run some off for you...I have some nice clear pine and with a nice oak stain they would look awesome..I made a few for a friend 2" deep and 2" round veneered with red oak....

 

[speakerman1]

It will be awhile till I start. Thank you very much.

Larry