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Author Topic: Preamp Case/Chasis Screws  (Read 535 times)

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rnolan

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Preamp Case/Chasis Screws
« on: Time Format »

As I said on another thread, the only ADA preamp I have with all its screws is my original MP2 bought new, I have only had the top off this unit a few times (EPROM upgrade, 3 x tube changes (1. SPAX7s not optimal); 2. NS LP Mullard 12AX7; 3. new NS LP Mullards)).  I even went as far as always putting the screws back in their original holes (call me pedantic but don't call me late for dinner LoL).  And even with all that care taken some wont tighten down properly anymore.

All my other units (3 x MP2, 2 x MB1 & 2 x MP1) have screws either missing or wont tighten (partially stripped).

With the MP2, the 3 screws that mount the lid to the heat sink (which is aluminum) strip and end up loose, and sometimes fall out and/or are hard to remove (which you have to, to take the top off). I can sort of live with "some" of the other screws being missing/loose but it's important that the heat sink mounts solidly to the top to dissipate heat (which MP2s make quite a bit of).

So I'm sure I'm not alone in this, what are good solutions fellow ADAers ?
Very slightly larger screws ? possibly the difference between metric and imperial can help here ?? as in the closest metric (almost) equivalent is just a little larger  :dunno: .
Some sort of "lock tight"
I've tried thread tape (on the MP2 heat sink screws), it's a pain to do and doesn't work
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Studio Rig: MP2/MB1 > Eurorack UB2442FX-Pro > TC M-One XL > Behringer Truths (with Truth Sub) / QUAD ESL 63s
Live Rig: MP2/MB1 > Alesis Quadverb > Alesis Midiverb 4 > Yamaha AM802 > B200s/Carvin TS100/DCM200L > ADA Split Stacks/Mesa P112s

Soloist

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Re: Preamp Case/Chasis Screws
« Reply #1 on: Time Format »

My Mp1 was missing a few screws and the holes were striped. I used a slightly larger self tapping sheet metal screws. Worked like a charm! Don't forget to paint them black first like I did. :nono:
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Live Rig:
Preamps -ADA MP1-ADA MP2-Marshall JMP1-Digitech GSP1101
Post Effects -TC Electronic G Major2-TC Electronics G Force-BBE 482i
Pre Effects -Boss NS 2-Boss GE 7-Radial Engineering Hot British-Ibanez TS9-MXR M108-Boss SD1
Mixing/Switching -Alesis Multimix8-Voodoo Lab GCP-Voodoo Lab Amp Selector- Radial Engineering Big Shot I/O v2
Power - ADA MT200-Mesa 50/50-Voodoo Lab ISO5 Pedal Power-Furman RP8-Livewire PC1100
Axes - Charvel So Cal Pro Mod-Jackson DK2MQ Pro-Jackson USA Soloist-Ibanez RG3XXV
Cabs -4 2x12 ADA Split Stacks

MarshallJMP

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Re: Preamp Case/Chasis Screws
« Reply #2 on: Time Format »

The original screw are 4-40 x 1/4 (if I remember correctly) which is around 2.8mm so the next in line in metric would be an M3 screw. If I have stripped threads I first use an M3 tap (be careful with the small metal pieces that could fall) and put in M3 screws. Works great.
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Iperfungus

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Re: Preamp Case/Chasis Screws
« Reply #3 on: Time Format »

This issue with screws seems to be very common with ADA stuff...:facepalm:

I remember many screws of my old V1.38 had this problem.

Now my main MP-1 has 100% perfect, tight screws.
But the 2nd one with issues I recently bought have just of couple of screws that work fine...
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On the run again!

Rack stuff from Hell:

ADA MP-1 (modified by MJMP)->TC Electronic G Major->Marshall Valvestate 8008 power amp

Marshall JMP1->Alesis Quadraverb GT->Advance Tube Technologies TA '70 tube power amp

Zoom 9150->Marshall Valvestate 8004 power amp
Zoom 8050 MIDI Controller
Zoom FP01 Expression pedal

Behringer FCB1010 MIDI controller

Blackstar HTV 212 stereo cabinet with 70/80 Celestion speakers

Amps:

Rivera Pubster 25
Blackstar Fly 3 amp + external speaker

Stomps, stomps, stomps...and stomps (Bogner rules!):

TC Helix phaser, Xotic RC Booster, TC Sentry noise gate, Bogner Ecstasy Blue, Bogner Ecstasy Red, Mad Professor Royal Blue Overdrive, Sonic Research Turbo Tuner, TC Flashback delay

Guitars:

2018 Arrogantia Pandora Vendetta 24 HH Trem-1987 PRS Custom-1988 Fender Strat Plus-2016 Custom assembled Fender Strat-2013 Gibson SG Standard-1995 Gibson Les Paul Studio-1991 MIJ Ibanez RG570FM TB-2016 MIJ Ibanez RG655M SPM-2002 Bruno Traverso Custom "Tommy" Silky-2017 Kramer Baretta Special-2010 Simon & Patrick Woodland CW acoustic

MarshallJMP

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Re: Preamp Case/Chasis Screws
« Reply #4 on: Time Format »

I actually only use 2 screws to secure the top lit. It's easier to change tubes if needed.
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Iperfungus

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Re: Preamp Case/Chasis Screws
« Reply #5 on: Time Format »

I actually only use 2 screws to secure the top lit. It's easier to change tubes if needed.

 :lol: :lol: :lol:
EPIC WINNER!
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On the run again!

Rack stuff from Hell:

ADA MP-1 (modified by MJMP)->TC Electronic G Major->Marshall Valvestate 8008 power amp

Marshall JMP1->Alesis Quadraverb GT->Advance Tube Technologies TA '70 tube power amp

Zoom 9150->Marshall Valvestate 8004 power amp
Zoom 8050 MIDI Controller
Zoom FP01 Expression pedal

Behringer FCB1010 MIDI controller

Blackstar HTV 212 stereo cabinet with 70/80 Celestion speakers

Amps:

Rivera Pubster 25
Blackstar Fly 3 amp + external speaker

Stomps, stomps, stomps...and stomps (Bogner rules!):

TC Helix phaser, Xotic RC Booster, TC Sentry noise gate, Bogner Ecstasy Blue, Bogner Ecstasy Red, Mad Professor Royal Blue Overdrive, Sonic Research Turbo Tuner, TC Flashback delay

Guitars:

2018 Arrogantia Pandora Vendetta 24 HH Trem-1987 PRS Custom-1988 Fender Strat Plus-2016 Custom assembled Fender Strat-2013 Gibson SG Standard-1995 Gibson Les Paul Studio-1991 MIJ Ibanez RG570FM TB-2016 MIJ Ibanez RG655M SPM-2002 Bruno Traverso Custom "Tommy" Silky-2017 Kramer Baretta Special-2010 Simon & Patrick Woodland CW acoustic

MarshallJMP

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Re: Preamp Case/Chasis Screws
« Reply #6 on: Time Format »

I actually only use 2 screws to secure the top lit. It's easier to change tubes if needed.

 :lol: :lol: :lol:
EPIC WINNER!

 :thumb-up: ;D
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