Help re: Constant 'Clicking' Sounds

[coastal1]

Hello,

Need a little help.  I'm getting constant 'clicking' sounds from my amp that starts without anything plugged into the RCA jacks so it's not coming from interference from source.  At first I thought it might be a new input tube that hadn't burned in, but I tried a Telefunken that's sounded clean before and still got the clicking sounds.  Using TS 5998 as output tube, and that too has previously sounded great. 

So I was thinking I'll clean the tube pins and tube sockets, and then check all connections.  Cleaning the tube pins seems easy enough, but any advice about the best way to clean the sockets is appreciated, as well as the best contact cleaner to use. Also, the output tube 'wobbles' quite a bit more than the input tube.  Could this be a possible cause of the noise, i.e., not a tight enough connection?  The wobble is not new (sounded great before) so I'm a little reluctant to try to mess with that unless that's an obvious red flag.  I bought this used so not sure if the wobble is normal, or if the output socket needs to be tightened or replaced.

Any other likely causes?

Along with trying a new input tube, I did move the amp to a room that has a router (and TV) nearby.  Those were the only changes.  The router is a couple of feet away, the TV is very close, though turned off.  So I guess my first step should be moving the amp back into the previous room.
 
Thanks in advance.

Coastal1 (though landlocked in NC right now)

[Doc B.]

Is the clicking in both channels? It could be coming in through your power line, from some appliance in the house. You can try to isolate the problem by turning off different appliances while you listen to the amp with no music playing

If the clicking is only in one channel check the output cap on that side for damage like a burn mark from a soldering iron.

[coastal1]

Is the clicking in both channels? It could be coming in through your power line, from some appliance in the house. You can try to isolate the problem by turning off different appliances while you listen to the amp with no music playing

If the clicking is only in one channel check the output cap on that side for damage like a burn mark from a soldering iron.

Thanks, pretty sure it's both channels but will double check to confirm.  I will first move it back into the previous room (no router, TV, or other electronics)

[coastal1]

By the way, is the 'wobble' of the output tube normal or should it be something I keep an eye on even if unrelated to this issue?

[Paul Birkeland]

Try turning your cell phone off to see if the noise goes away.

If the output tube wobbles a little bit in its base, you can dribble a drop or two of super glue between the glass and the base to fix that.

[Nathan]

Try turning your cell phone off to see if the noise goes away.

In the past I found that a cell phone could be a source of interference.

Compact fluorescents as well (but hashy, not clicking)

[coastal1]

Thanks, I don't think it's the phone but will try that too if other things dont work.  Not my usual setup, but I've used Tidal on iphone->iFi Micro->BHC without any issues.  Appreciate all the help.