pucho812
Well-known member
Anyone have any info on the 312 demedio mods?
I found this
http://m.ebay.com/itm/140592873802?cmd=VIDESC
And a repost of txt in case the link does.
Here's something rare.
Vintage API 312 microphone preamplifier circuit built from Sunset Sound 325 card.
This mic preamp is setup to fit any API 500 series lunchbox
A rare vintage mic pre: the studio standard for excellence around the world.
The original 325 card was pulled from an API Demedio console that used to be in Sunset Sound Studio 2.
This 325 card has been made into a mic pre based on the API 312 circuit and the Sunset Sound revision of the circuit.
These cards feature the Sunset Sound and Jensen improvements to the API 325 card.
The Deane Jensen designed 990 opamp was patented (US Patent 4287479) and served as the basis for the amplifier.
The pairing of the 990 with a Jensen JE 123-AL nickel alloy output transformer gives a clear present tone that is magical on vocals.
The opamp and input transformer pairing was designed by Deane Jensen as the ideal combination for a mic preamplifier
The low turns ratio input transformer will have lower distortion, wider bandwidth and improved phase response.
The phase accuracy is also improved by the jensen output load isolator (JOLI: the red coil) which improves the phase response at the output transformer.
Adding the low turn ratio JT 16 input transformer makes these identical to the mic pres in the Demedio boards at Sunset Sound and Paisley Park .
Prince'ses first records, Van Halen'ses first records, even some Led Zeppelin tracks we're cut using mic pres of this design.
This very 325 card spent over a decade at Sunset Sound working on those very records.
I've recapped and rebuilt this card to function problem free for another 40 years.
Minimal noise and crystal clear output power; sounds amazing on vocals and guitars.
Fully setup and ready to amplify signal in your studio. Whatever you put in comes out sounding like a record.
The module is set up with a 25K reverse log gain pot, Phase, 20 dB pad and 48 volt phantom power.
The original card, vintage opamp and transformer have been preserved; no traces have been cut, no holes drilled into the card.
So looks like they used a 900 vs a 2520 and Jensen transformers. Can anyone confirm this?
I found this
http://m.ebay.com/itm/140592873802?cmd=VIDESC
And a repost of txt in case the link does.
Here's something rare.
Vintage API 312 microphone preamplifier circuit built from Sunset Sound 325 card.
This mic preamp is setup to fit any API 500 series lunchbox
A rare vintage mic pre: the studio standard for excellence around the world.
The original 325 card was pulled from an API Demedio console that used to be in Sunset Sound Studio 2.
This 325 card has been made into a mic pre based on the API 312 circuit and the Sunset Sound revision of the circuit.
These cards feature the Sunset Sound and Jensen improvements to the API 325 card.
The Deane Jensen designed 990 opamp was patented (US Patent 4287479) and served as the basis for the amplifier.
The pairing of the 990 with a Jensen JE 123-AL nickel alloy output transformer gives a clear present tone that is magical on vocals.
The opamp and input transformer pairing was designed by Deane Jensen as the ideal combination for a mic preamplifier
The low turns ratio input transformer will have lower distortion, wider bandwidth and improved phase response.
The phase accuracy is also improved by the jensen output load isolator (JOLI: the red coil) which improves the phase response at the output transformer.
Adding the low turn ratio JT 16 input transformer makes these identical to the mic pres in the Demedio boards at Sunset Sound and Paisley Park .
Prince'ses first records, Van Halen'ses first records, even some Led Zeppelin tracks we're cut using mic pres of this design.
This very 325 card spent over a decade at Sunset Sound working on those very records.
I've recapped and rebuilt this card to function problem free for another 40 years.
Minimal noise and crystal clear output power; sounds amazing on vocals and guitars.
Fully setup and ready to amplify signal in your studio. Whatever you put in comes out sounding like a record.
The module is set up with a 25K reverse log gain pot, Phase, 20 dB pad and 48 volt phantom power.
The original card, vintage opamp and transformer have been preserved; no traces have been cut, no holes drilled into the card.
So looks like they used a 900 vs a 2520 and Jensen transformers. Can anyone confirm this?