Vintage Microphone preamp for sale $650.00

[#37Glass]

This is a four-tube Vintage style mike preamp built all with vintage componets including the knobs. The VU meter is from a Sun mixing console and has lights. The tubes are; #39/44 pre stage, #76 buffer and two #37 triodes in parallel for line drivers to the Altec 15095 15K/600 ohm output transformer. I set this model up to use the Altec 4722 input transformer. This unit has a Cinemag 150 ohm to 40K input transformer.

I have built several of these units that are in use. This unit was built recently from a spare chassis for research to get the info to design a eight tube monster version of this style circuit.

This unit puts out +12/600ohm, has two stage gain control, Hi-PAss and low-Pass variable filters, two stage pad and phantom controls.

I am selling this unit, all information available, guarentee for 1 year although very stable and trouble free units. One has run for over four years with no service and is THE snare and Hi-Hat preamp of this studio over Neve and many other preamps. The one pictured has recorded vocals for a album while "making the rounds"

Great sounding, smooth, clear, big sound.

ToneMaster

Pictures available

$650.00 with solid-state PS that is super clean and spare tubes.

Cut/Paste the below link for picture.

http://i112.photobucket.com/albums/n186 ... ntBAll.jpg

George, San Diego

Look at this link to see samples of some of my work

http://photobucket.com/albums/b121/SalesBoy/
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[I'm Painting Again]

hey thats really awesome work!

I would love a preamp like that..looks so nice..

could you post some clips of it in action?

like going from clean into distortion on drums and voice maybe..

[#37Glass]

I have to get a "nappy" picture....

Next week I can take it to a friend's studio and run up some samples, put them on CD or Ipod downloads etc..

I can provide sound samples with the mike used named etc.

Thanx, I like the early look. Build for tone...

gEo...

[Coco]

Nice. I am unsure what the tube numbers you listed are. Are thse hard to get a hold of? What was the original purpose of the tubes, for TV sets? radios? Is the power supply for the pre in question rack mounted like the one seen in the pictures? Thanks.

[#37Glass]

The tubes were for audio. They are before TV.

The first triodes/tubes were four-pin, no cathodes, DC filiment. # 27, 30, 40, 56 etc. for battery radios on the farm.

Then these "Modern" 6.3VAC fil tubes with cathodes and five-pins.

#39/44 is a pentode = 78, 6j7, 6sj7, EF86 and 5879

#37 and 76 = 1/2 of a 12au7

The tubes can be bought from Play Things of Past and other sources and are cheap. They sound and work great.

Five-pin to 9-pin adaptors can be made up for this unit and can go with if sold. then you could run a EF86, a 12at7, and two 12au7 dual triodes.

The eight tube version will have both five and nine-pin sockets. You will beable to switch from vintage to new JJ tubes with one switch, no clicks.

The power supply is just for this unit and goes with. it is on a 5-1/4" plate. The pre is 3-1/2" so you need 8-3/4" total rack space. The supply can be unmounted from the plate and it can sit on the floor or side of the rack case.

I know a lot of early tube stuff.


The metal era had;

6j7 = 6sj7 = EF86

6j5 = 1/2 12au7 6c5 = 1/2 12at7 6f5 = 1/2 12ax7

Then the octal glass era and 6sn7 and 6sl7 as the "Modern Twin Triodes"


Let me know if I can answer tech questions.

[pumadrum]

Do i spy transformers out of a Yamaha PM1000 board in your pic?

How much do you want for those?

[#37Glass]

I have some input trannies. I have no outs.

They are great transformers. they are flat out to beyond 100kHz and great sign wave at power to 30Hz. They handle 25V in/out with no problem.

I just built two nice dual YAm mike preamps with vintage front panels using the talkback boards that have no EQ, just two gain stages.

Then in trans, gain stage with gain control, level, then line stage, then out trans and they sound Fab. Very clear with no EQ. I have done a lot of PM1000 mods.

I can sell a few inputs.

I am thinking about making a PC board that would be two gain stages for building preamps or EQ's with the same circuit. Use vintage Yam trans and new caps.

I have pics of the fancy Dual units. They can Di also.

Nore: There is a DI in on the vintage mike preamp...