Troubleshooting : DPA 4018 is not seating on brand new MMP-A preamp

[Paul Garafola]

My 4018 cap screws on easily & perfectly to my MMP-B and MMP-C pre-amps - and here's where it's giving me resistance on the MMP-A. (see photos)

In this moment, I do not want to take the chance on giving it more force, in order for it to seat as it should.  I don't want to make the problem worse.

 

If you've had this occur, is it an actual problem - or will it seat perfectly if I continue turning it past the resistance?  Did yours?

 

If you'd had this exact situation occur, what was the solution?

 

Thanks for your help.

 

 - Paul

 

[Roderick Matte]

The MMP-A threads would perhaps need a subtle brushing to clear any possible debris. I'd use a slight dab of ceramic thread/bike chain lubricant. Difficult to gauge when torque is critical- .2 Nm would be a good start. Otherwise, DPA are usually quite precise in threading. I'd contact DPA if nothing else.

 

[Paul Garafola]

Hi Roderick,

Yeah, I cleared and cleaned the threads on the MMP-A and still no progress. 

I would try the lubricant, but I really think the primary and only issue is a faulty thread.

So you've had this exact issue and the lubricant actually worked - and the capsule then attached easily??

(Yeah, if there's not a solid solution that people have succeeded with, then I'll just send it back for a warranty replacement.  But obviously, I'd like to not have to do that.)

Thanks for your reply.

 

 - Paul -