It will be a couple of weeks as I still have stuff to get and I'm going to have to strip out the F6 boards.
Mine is up and running! The Teas boards are very nice to solder and also look very cool...
I have a little problem whit hum on both channels, it looks like a ground loop. Mine is dual mono every side has its on CL-60 from PSU GND to common earth on one point. So maybe I did something wrong whit wiring or the input autoformer is picking up something....Maybe someone did experience the same...
I have a little problem whit hum on both channels, it looks like a ground loop. Mine is dual mono every side has its on CL-60 from PSU GND to common earth on one point. So maybe I did something wrong whit wiring or the input autoformer is picking up something....Maybe someone did experience the same...
I would wire each speaker ground and all signal grounds if needed to one single ground point on a place before the CL60's attach to Chassis.
So IMO, only the v+ and - are seperated per se, but the signals return to a central point, at least for troubleshooting purposes.
my argument may be flawed technically, but I am a troubleshooter by profession. Logic isn't always a good variable to follow.
Here is a reference with Cantilopes setup. I cant speak for him, but clearly the for me the instructions I gave above were not followed, and he does not speak of hum.
http://www.diyaudio.com/forums/attac...1&d=1459177769
I used shielded input cabling to resolve my hum, just a signal wire and a shield that acts as ground. This can be determined if moving the signal wire increases of decreases hum.
I don't believe that you did anything technically wrong
You just need a better more comprehensive earth
I had similar hum issues on my F6 and a better earth as teabag has outlined fixed it
FR
If you want to see how it was done on my F6
It's on and after post 168 - http://www.diyaudio.com/forums/pass-labs/278695-upgrade-f5-f6-17.html
I wholeheartedly agree. One ground point "Star" for all grounds except chassis. Isolate chassis ground with CL60.
I discussed this with Cantilope when he did complain about a slight amount of hum with test speakers. I suggested he put all grounds to one point but later after he installed the amp on his Jubilees he said it was quite. He did agree that one point is what he should have done but we decided if it was quite to just leave it alone. I am a firm believer in Star ground with both SS and tubes. If you do not you may get lucky but more likely you will cause a ground loop hum. I think the hum with the test speakers could have been using 2 different AC outlets for components.
We talked yesterday and he is loving his amp.
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I will do the classic star approach. Wire all grounds to a star and then via CL-60 to chassis.