Storage Parts Build

[thee]

Buildings a few simple channel strip units (pre/eq/comp) from parts i had stored. The builds will lean to the unconventional & artist side -- using up as many tubes & iron i can -- I greatly invite "over-done" designs. I will post the Audio Transfos below & will check-in later today with the valves.

ALTEC LANSING TMB-156
UTC HA-100X
UTC A-25
UTC A-25
GTC AMPEX B-6300 (TRIAD B-6300 / UTC HA-133 equivalent)

 

[thee]

here are the vacuum tubes i saved

(1) AMPEX 6DJ8
(4) TELKEFUNKIN 12AX7
(3) SYLVANIA 12AU7
(2) PHILLIPS EC88
(2) AMPEREX EL84

 

[thee]

physical layout of potential ideas

 

[thee]

using gyraf & ian bell thompson sections

*we will do a much more SIMPLER design for pre + eq.

pre:
no pad, phase, line, di - none (even considering dropping the phantom power)
60db of gain via stepped switch
*attenuator (as on HAIRBALL LOLA)

eq:
low-pass w/high shelf
via capacitor substitution box + variable transformer for inductance

comp:
Ian Thompson Bell Poor Man's Tube Comp/Lim *2012*
*Ian will be putting out a new version of this he has prototyped which will be the version used

 

[mickeymoose]

Man: must not forget blinken lights and holes for fingerpoken!

Looks like fun, enjoy and keep sending progress pictures! E

 

[thee]

I will post some Block-Diagram of my ideas. Thank you for the kind words.

 

[thee]

I would like to make a 2-channel strip where the signal chain is identical except the input transformers (HA-100X + TMB156 ...which I’m not certain is even an input transformer by ALTEC LANSING)


The reason for making this so complicated is so I can use it as two separate voice channels for Powering (2) SM7B — however also be able to for out my DAW into (2) inserts into the compressor section — using the stereo compressor in this unit (The poor mans tube compressor by Ian Thompson Bell)


Can anyone tell me about the:
ALTEC LANSING TMB156
TRIAD B-6300 output transfo

Thank you

 

[thee]

I might just make this (2) separate units. A mic pre/high pass/compressor + separate stereo compressor when Ian posts his data.

 

[thee]

Also (2) EF84

 

[thee]

*turret board & point to point
*48V & heater supply are standalone power modules

 

[thee]

Would like to use the (2) small antenna current gauges to give a read out of the maybe the heater current & the HT supply current. Just as a visual gimmick. But done correctly so it’s not cheesy as this project is intended to be a respectable build with an over the top artistic flare — still, quality & correctness come first as always.

 

[thee]

10H & 7H chokes available
*would love to integrate the 7ohm 165W resistor
*80MFD 450W.V. Cap might be dried up - testing now
*want to design a very “clever” looking supply of old parts but presented nicely for the eyes

 

[thee]

ALTEC LANSING TMB156
GTC AMPEX B-6300
UTC HA-100X
UTC A-25

dc resistance

 

[thee]

I want to hear my eq in real-time. So I tapped in the capacitor box & then the variable transformer as our coil. With 11k &16k shunt resistors. Whatever I grabbed randomly. Sang through it and turned some knobs. Enjoy the sound very much. Only had buzzing in the variac on one end of the extreme turns left or right. but when The capacitor box then was altered it would go away.

 

[thee]

Sounds alright. Going to sing through it and see if it betters the signal chain or is all in my head. If that is the case. I’ll arrange the same components but as done in the MEQ5

 

[thee]

I do not have the knowledge to design a gain stage. Can someone show me how I would set this up and bias. Thank you.

I can copy a previous design. But I would like to know how to do it myself as in this scenario. Thank you

 

[thee]

Didn’t like the MEQ5
Gonna stick with the tested design pictured below the MEQ5.

 

[thee]

Going to try and draw this out in block diagram now I have all 3 sections. Pre, eq, dynamics

 

[thee]

audio clip

 

[thee]

Pictures