Premier Rock Forum

Date: 5/26/02
Equipment: Schoeps 221 PSU
SN: 7111261
Problem: no output on mic
Out to:
Repaired: blown 2.2k resistor replaced
Date: 5/28/02

Date: 6/15/02
Equipment: Schoeps 221
SN: 7111231
Problem: mic cutting out
Out to:
Repaired: bad wiring at mic cable conn.
Date:

Date: 7/15/02
Equipment: Ampex 351 mic pre
SN: #1
Problem: buzz on output
Out to:
Repaired: BAD spague PS filter cap replaced
Date: 7/15/02

Date: 7/02
Equipment: check and label lomo cables
SN:
Problem:
Out to:
Repaired:
Date:

Date: 8/08/02
Equipment: Neotek Elite spare channel
SN:
Problem: no 'odd' buss send
Out to:
Repaired: buss pan pot shorting odd wiper trace, replaced pot
Date: 8/02/02

Date: 8/08/02
Equipment: Studer 820 16-tk head block
SN:
Problem: static noise on repro due to lame head core grounding
Out to:
Repaired: Flux Magnetics repro head core painted to ground with silver paint (where head core meets the side)
Date: 8/08/02
*Not Final Solution*

Date: 8/06/02
Equipment: Lomo 19a18 PSU
SN:
Problem: B+ gone - components fried
Out to:
Repaired: built new power supply (VTPSU9B) works like a charm
Date: 9/02
"VTPSU9B" stands for Vacuum Tube Power Supply Unit 9b. It is my soft start tube mic power supply. Clever name huh? It turns on the filament voltage first, then, after 60 seconds ramps up the B+ voltage, slowly fading the pretty sound up. There is a bi-color status led that is red during the warm up, then switches to green when the mic is on and ready. It is now used for the AKG C-24, and dual supply for the Schoeps 221b.



We are now entering the period of recent memory. Things will be a little more fleshed out... maybe/

Date: 8/13/02
Equipment: Alec 175 PSU
SN:
Problem: buzz on output
Out to:
Repaired: Power transformer had a stronger than normal magnetic field. The output transformer was picking that up.
Date:

Date: 8/13/02
Equipment: Neotek Series II
SN: CH33
Problem: Noise on Mic Pre
Out to:
Repaired: 'sploded 48V DC Blocking Cap (C103), and diode between 100 ohm resistor (to -18V) and C103 failed.
Date:

Date: 9/8/02
Equipment: Phantom PSU (for 351s in studio b)
SN:
Problem: dead
Out to:
Repaired: blown cap between secondary windings
Date:
I am not sure what happened here.

Date: 9/17/02
Equipment: Neotek Elite
SN: CH14
Problem: When in-place soloing the channel, the left side would cut in and out.
Out to:
Repaired: Replaced bad solo button
Date: 9/18
I don't remember if I tried to clean it

Date: 10/21/02
Equipment: Neotek Elite
SN: CH37
Problem: Fader polarity reverse switch cuts level in half when fader source is Line 1 input
Out to:
Repaired: R312 wasn't removed at factory causing a feedback path for the op amp when L1 was selected. This section was changed as part of the customization of our Elite.
Date:

Date: 10/21/02
Equipment: Neotek Elite
SN: CH29
Problem: NO output on monitor fader (direct out, buss, and solo)
Out to:
Repaired: No problem found on test bench. May have been a loose connection? Worked when reinstalled.
Date:

Date: 10/02
Equipment: Z-vex pedal
SN: Super hard-on
Problem: dead
Out to:
Repaired: replaced FET BS170P, works (we got 9 more fet's)
Date:

Date: 11/7/02
Equipment: Josephson
SN: 609 SN 2674
Problem: popping noise when moved
Out to:
Repaired: pin 1 connection cold
Date: 11/7/02

Date: 11/7/02
Equipment: ATR
SN: #1
Problem:
Out to:
Repaired: calibrated I/Os
Date:

Date: 11/11/02
Equipment: ATR
SN: #4
Problem: Shuttering noise while capstan is achieving lock
Out to:
Repaired: Adjusted capstan tach sensor gain
Date:

Date: 11/11/02
Equipment: Neotek Elite
SN: CH 19
Problem: No Aux A send
Out to:
Repaired: Replaced Aux A/B gain pot
Date:

Date: 11/11/02
Equipment: Neotek Elite
SN: CH 13
Problem: Signal leaks to Aux B bus when level is down
Out to:
Repaired: Replaced Aux A/B gain pot
Date:

Date: 11/11/02
Equipment: Ampex 351 Mic Pre
SN: #4 (St A)
Problem: Signal dead w/ pad on
Out to:
Repaired: bad switch replaced w/ greyhill 71BD30-02-2-AJN
Date:

Date: 11/13/02
Equipment: UREI LA22
SN:
Problem: bypass distortion
Out to:
Repaired: bad relay replaced, spares are in UREI file
Date: 11/15/02

Date: 11/14/02
Equipment: Studer 820 24tk (studio A)
SN:
Problem: low o/p track 24
Out to:
Repaired: bad punch at punch-block
Date:

Date: 11/14/02
Equipment: Manley Elop
SN:
Problem: Noise on Rt. Chan.
Out to:
Repaired: noisy tube 5814A (12AU7/6189), replaced both channels with new tubes also replaced burned-out meter bulbs

Date: 11/3/02
Equipment: Sytek MPX 4A
SN: 610-034
Problem: CH 1 sounding f'ed up
Out to:
Repaired: DC(48V) blocking cap blown on one leg of input - replaced both caps
Date: 11/?/02

Date: 1/23/03
Equipment: EV PL-20
SN:
Problem:
Out to: Telex, inc.
Repaired: done
Date: 2/03

Date: 1/23/03
Equipment: Sennheiser 441
SN:
Problem: Smashed mic from someone using it like a lawn dart.
Probably fell off a stand. Steve uses these for talkback mics. What a snob.
Out to: Sennheiser
Repaired: done
Date: 2/03

Date: 1/23/03
Equipment: Royer SF-12
SN:
Problem: blown bottom ribbon
Out to: Royer, inc.
Repaired: done
Date: 2/03

Date: 1/23/03
Equipment: Earthworks QTC-1
SN:
Problem: noisy
Out to: Earthworks, inc.
Repaired:
Date:

Date: 1/23/03
Equipment: RCA BK10, RCA 44DX
SN:
Problem: blown ribbons
Out to: Clarence Kane of Enak
Repaired:
Date:

Date: 2/18/03
Equipment: Manley Elop
SN: 308 (early, black pcb)
Problem: No Audio on left channel,
Out to: manley for new main pc board 2/03
Repaired: yes
Date: 3/03
B+ jumper burned up after left channel B+ bypass electrolytic cap failed (shorted). Circuit board became resistive around the scorched area. I didn't know that could happen. It caused problems when I replaced the destroyed parts.

Date: 2/28/03
Equipment: GML EQ
SN:
Problem: right channel noisy
Out to: GML for repair and recalibration 3/03
Repaired: return
Date: 3/03

Date: 2/29/03
Equipment: Josephson 609
SN: 2744
Problem: low output on mic
Out to: Josephson
Repaired:
Date: 5/04

Date: 4/15/03
Equipment: Harmonic Percolator
SN:
Problem: Bypass not working
Out to:
Repaired: cold/broken solder joint on foot switch
Date: 4/15/03

Date: 4/20/03
Equipment: Josephson 609
SN: 2673
Problem: high level / distortion
Out to:
Repaired: set screws not making good contact for ground
Date:
Later replaced with new screws, which did the job better.

Date: 4/03
Equipment: Senn MKH405
SN:
Problem: Only accepts "T" 12 volt phantom power
Out to:
Repaired:
Date:

Date: 4/03
Equipment: Traynor mono block
SN:
Problem:
Out to:
Repaired: Installed new power switch, IEC connector and cleaned inside
Date:

Date: 1/03
Equipment: Lomo 19-9
SN: 640295
Problem: wind noise
Out to:
Repaired: replaced tube and cleaned connections
Date:

Date: 5/06/03
Equipment: Josephson 606S and 609
SN: 3179, 3178, 3175, 2673
Problem:
Out to: josephson for screw mod
Repaired:
Date: