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Phase Linear 400

Have you tried tightening the transformer bolts??Every one that comes through here ios loose. Cuts alot of hum out when tightened.
 
Yes tighten up the transformer bolts ,all 4 were loose. Bias is good at 370mV now and relay kit installed . I'll test it later today , Thanks for all your help
 
AN done . I did the LED light also. It creates a shadow bar on VU meters ,that has to go but other than that all is well.. The amp sounds great I have it with a McIntosh C-33 ,Snell C /V , plays loud and clear . This was a great project if you have PL amp I would think about it. Thanks to laatsch55 and Joe at White Oak Audio and Don and his relays .All well designed kits . Thanks again
 
I had a ball working on it . I was surprised at first how simple the original design is ,there is not to much to this amp. SS was still kind of new then I guess . I'll keep an look out for a 700(though , the 400 is better looking) . I'll take a break and then maybe the 4000 or 2000 preamp.
 
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