A few screws loose

Nathan · 1755

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Offline Nathan

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on: April 10, 2015, 05:56:52 PM
I was taking a close look at my Crack today, which I built last May. I discovered the 4 transformer screws were  not tight. I'm sure they were snugged down when I built the Crack. My point is it may be worthwhile to check the screws every so often, and I wonder if a touch of lock tight might not be a bad idea.

Crack/Speedball, SEX 2.1/C4S, Bryston BHA-1

Sennheiser HD600/Cardas cable, Beyerdynamic T1 2nd Gen, Hifimam HE560/Hifiman balanced cable

Offline Grainger49

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Reply #1 on: April 10, 2015, 11:55:14 PM
Transformers vibrate.  But I thought Bottlehead used star, lock, washers on the transformers.  That should keep the screw/nut from backing off.  But I will check my Paramours today.  If I find they are loose I will post back.

Thanks for the heads up.


Offline Paul Joppa

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Reply #2 on: April 11, 2015, 09:12:42 AM
The lock washers should do the job, but it's possible the insulating shoulder washers get compressed, or fit better in their chassis holes, after a few heat cycles. While you're at it, check the RCA jacks, they often loosen up after a while.

Paul Joppa

Offline Nathan

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Reply #3 on: April 11, 2015, 10:02:31 AM
I've tightend the rca jacks in the past too

Crack/Speedball, SEX 2.1/C4S, Bryston BHA-1

Sennheiser HD600/Cardas cable, Beyerdynamic T1 2nd Gen, Hifimam HE560/Hifiman balanced cable

Offline Adrian

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Reply #4 on: April 11, 2015, 03:55:33 PM
Ditto
I've found items getting loosened due to repeated heatup and cooldown cycles.
It is not uncommon in industry for newly constructed components to change in this manner.
One reason preventive maintenance is important ("fix it" before it requires corrective maintenance).

Adrian C.

VPI Prime w/Ortofon Quintet Black MC/Rothwell MCL Lundahl SUT/EROS/Submissive (3 output mod)/Mainline/Crack - Speedball/S.E.X. 2.1 - C4S/S.E.X. 3.0 - C4S/Paramounts - Blumenstein 2.2 Mini-Max w/DOF mod -Senn HD600/Viso HP50/Focal Elear.

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