Tag Archive for 'pultec mb1 mic preamp'

rolaphon mixer box

rolaphon8

rolaphon9

stereo recording mixer build.  8 mono channel input – two further stereo inputs.  pair of mike  amps and a pair of germainium preamplifiers .  two fx sends per channel with individual go switches for extra play-ability.  a pair of mono subgroups and a stereo mix bus of course. a full control room section enables complete studio and mixer monitoring . and processor insert abilities over all the inputs and outputs conveniently arranged in one row of top panel socketry . this ‘ rolaphon ‘  contains 38 transistor neve-ish amps and will fits  into an  old ROLA 66 tape recorder cabinet. the rolaphon opens up like a chest. plenty of expensive goodies in there.

phono roger eq one

ive been experimenting with a valve mag phono stage for a while and have at last nailed it. the mysterious circuit had suspicious boobitraps and ommisions, pfff.   i think by marrying it with the fabulous roger eq one …  your record player can  now drive a truck!   so fat and powerful.  u can pop your boat and caravan on there too. i’ll make this one into a beaut thorn  mk12 tape recorder cabinet over the summer . that  understated grey vinyl covering is a perfect foil for the bright electric valve sound about to be transplanted in.

skyqueen pultec MB1 tube preamp

this EVER READY SKYQUEEN  is straight out of the 1950s. shes been (tenderly) gutted and had a beaut pultec  MB1 design  two tube mic/direct preamp built into her.
the 1/4″ direct input is a tough sounding hiZ instrument amplifier,
super great for direct bass guitar or keyboards.

the microphone input is balanced low Z  with switched  phantom powering . she uses an american edcor input transformer with custom sheilding.   the  pultec MB1′s custom output transformer is made from the highest quality japanese grain orientated steel. this improves the low low bottom end signal integrity.  xtal clear and solid bottom end gives an amp the big dynamic smack ability.

the stereo 1/4″ input  has a left/mixed/right signal switch.  -  matches from a media player whatsit. ipod or cd payer. sounds awesome – the valve amp gives that signal a very much sweet tweaking.

she also has a tube  P.A  stage to drive the small but fat sounding internal  speaker.  or headphones.  the p.a amp isnt a powerful one, just 1 or 2 watts of valve radiogram style.
the skyqueen has very desireable looks.  with creamy aligator tolex vinyl covering and brassy trim bits. she has a fancy – and so modern perspex handle too.  i hope the photos taken in the lovely matamata early evening light  do the skyqueen some  justice. she really is  unique.  weve been soak testing skyqueen day and night just playing cds thru her. wow . so good.

skyqueen in the bath

the skyqueen’s panel and sexy knobs are off for their annodising bath. shouldnt hurt a bit. i dont really think that the panel is going to come back quite with so much  uranium tan or anything like the above shot. we’ll see what advanced anodisers in tokoroa can do with it eh.  anyways in the midst of all the other secret work … the skyqueen is almost alive. ive changed out the  5 inch round celestion speaker for an australian rola ‘c’ 5″X3″ original 60s unit. the sound has superior bass punch and flatter top end zing now.  for sale soon at 1500nz$  +gst  for the skyqueen MB1 tube preamp and speaker/headphones playback amp. in a beautiful small textured vinyl covered plywood cabinet with very curvacious perspex handle.

nominee for ugliest amplifier in the world

so far the  MB1 amplifier (12ax7 & 6aq5) and the small speaker power output stage (6aq5) are built onto an ugly custom stripped out chassis. its chopped up  to  fit neatly into the lovely old skyqueen cabinet.  it sounds great even with it’s very temp/experimental control  wiring. just need to  drill and letter stamp up the panel, anodize it.. and finish the build. the ugly chassis looks like many  50′s european radios . those crazy germans made the ugliest most dangerous looking electronics   …placed  inside beautiful veneered plywood cabinets. u just dont see  that stuff being made anymore. if anything has curves -  safely assume it is moulded plastic.

ferralgrapha is building

ive drilled up the panel and letterstamped it. it’s been  bent   to fit the cabinet properly and is getting anodized as i type.  while it is soaking  .  i’ll finish and test  the tube chassis. 8 tubes . 6 signal transformers. my evolved prototype chassis sounds great – really open feeling microphone sound.   the tube amps – the very flavorful equalizing  possibilities -  and the in/external monitoring functionality make the ferralgrapha a complete one machine for studio or live recording sessions.

the killer rig

this stack of shiny junk is the killer rig  to kill all other so-called killer rigs.  fat as  pultec-ish MB1 stereo mike/di/line preamp. 4 tube chassis. the FAT LADY 5670 stereo limiting amplifier. 8 tube chassis. and the TEN8TOR GYRATOR stereo eq. about two bazillion transistor chassis. the most extreme channel strips you’re ever likely to see.  amazing sounding. so gutsy and so quiet!.  the sweet sweet clean fat MB1 valve preamp amping up . the totally sexy fat lady gain control freak limiting amplifier holding back . and the  sophisticated ten8tor gyrator equalizer being the ultra cool frequencies outputting amp with its devastating signal shaping powers.  i’ve been playing everything thru the killer rig last couple of days and am astounded at the improvement-of-everything-isation   power of it.

friend of ekadek


famous jazz musician and producer nathan haines has borrowed gear from me a couple of times. has loved it and has written these kind words.“I have used Greg’s equipment on several sessions and I have to say it’s fantastic sounding gear! Warm, translucent and with that real ‘vintage’ sound. His pre-amps are perfect for adding depth and character to any instrument or voice.”

hes talking about the cute MB1 valve mic amp called PHILLIP

and the ekadek/neve 535/538 all transistor stereo mic amp. theres a four channel channel version eka/neve 535/538 too.