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What do defective phono tubes sound like?

I have noticed some rather loud energy discharges when playing LP's.Sort of an abrupt popping.Not unlike static discharge.I do not get this with my digital playback.
The ONLY change made to my system lately has been a new arm.The problem began immediately "after" it's installation.It was just fine with the previous arm.

I don't want to make this an "arm" mfgr thing(and will not mention arm name)but wonder if the phono tubes in use(very NOS Siemens CCa's,with low hours)can be the culprit.

This is making me pull my hair out,and I have little already.
Any thoughts would be appreciated.
sirspeedy

Showing 2 responses by stiltskin

stiltskin
499 posts
 
Sirspeedy
Do you have back up pairs you could plug in and try first of all?

I'm sure whom ever you bought your gold pin Siemens CCAs from is someone you trust to deliver as advertised?

Re-test the CCAs.

It could of been coincidence this issue occurred just when you switched tonearms.

These are vintage electrical devices, sometimes they will develop problems quickly with a current flowing through them once again.

Also , I,m not suggesting you do this.
Some guys constantly roll tubes. The sockets were not ment for this.
But if you do!....Have a tech check them out

Good luck....
stiltskin
499 posts
 
Sirspeedy,
If you changed the tubes and you are still experiencing the same results. To narrow it down even further ,borrow a table from a dealer.Any model that you can plug into your system.
Or a phonostage from a dealer or from one of your buddies.

I know its even more work ,but it will tell you right away if it is your new arm.

However I suspect its not.

The out standing quality of your new arm would not have left the factory untested and checked over thoroughly, me thinks.
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