Phase Linear has a new noise...

[Lurk 0]

Spoiler

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Edited October 10, 2022 by Lurk

[Lurk 0]

Hello, new here and trying to follow instruction.

Ive been a fan of Carver and PL for 35 years i think. Finally gathered some specimens and have restored each as best i can. 

My reason for this "post"? Is recently a Phase Linear Model 300 seriesTwo Amplifier that i restored ?4 years ago, has a new noise.

Left channel makes a tic or pop of sorts, about 3 seconds after the relays click after start up.

Its not terribly loud, but very bothersome. Unit is still operational. 

If this brief explanation is of any use to you in helping me, thats fantastic! 

Im away from home and on the road so, i wont be on here for a few hours, but i am hoping for a nudge in the proper direction. 

-Lurk

 

 

[Ar9Jim 5,986]

Hi Lurk,

Its a tough call. It could be as simple as a bad solder joint. When you restored the unit did you change all of the electrolytic capacitors? 

 

Bad solder joints is good first check. Often you can have the unit running on a bench and touch the board with a piece of wood or plastic (I use a chop stick) to see if you can manipulate the noise when near the bad joint. 

 

 

Edited October 12, 2022 by Ar9Jim

[Lurk 0]

Ar9jim

Yes, i did replace the electrolytics. And did have a bad solder joint found by flexing a board thought it was a transistor, but it was a solder joint. I thought i would ask here before i get it removed and onto the bench.

Its just odd to me that its all of the sudden, and that its always same timing sequence. Left channel "tic"? About 3seconds after i hear the relay(s), just after start up.