Ok ,I understand that now. Not familiar with the electronics ways,if that makes sense ,in amplifier/psu design. I have had the trans connected at the in stage from the start the rest as to the build guide and i know may not apply to my center tap transformer. To bad there wasn' t a way to use the blocks in the center. I will dig up some wire . Thanks for everything so far...
Can the two GRD's from the speakers stay on the quick connects ,there are joint with a copper wire?
It's one or the other, but all grounds to one point.
You can try connecting the other grounds to the centre quick connectors instead so that in effect, all your grounds are more or less at one point and half way between the positive and negative grounds.
Transformer centre tap remains at input ground.
You can try connecting the other grounds to the centre quick connectors instead so that in effect, all your grounds are more or less at one point and half way between the positive and negative grounds.
Transformer centre tap remains at input ground.
As I said, grounds at one place. So the speaker grounds to the tabs should go to the "T" wire instead.
Or as I mentioned in my previous post, alternatively all grounds to the quick connect tabs.
Or as I mentioned in my previous post, alternatively all grounds to the quick connect tabs.
Most frustrating.
How sensitive are your speakers? How loud is the hum?
Did you twist the V+,V-,Gnd wires together for each channel?
Did you try rotating the power transformer?
The AC IEC connector and wires are right next to the DC power out. Jim, what do you think - any bad effects?
How sensitive are your speakers? How loud is the hum?
Did you twist the V+,V-,Gnd wires together for each channel?
Did you try rotating the power transformer?
The AC IEC connector and wires are right next to the DC power out. Jim, what do you think - any bad effects?
It is still the same. The speakers are Elsinore's about 91db approx . I can hear it . I have two other 30 yr old amps that are silent on same speakers. Twisted wires as much as possible.I have rotated and done back to front removed it and put a tin over top a foot away on table. Thanks for all your help maybe try moving psu away to see if that does anything.
I've always bought Antek transformers from USA.
If you had removed the transformer and placed it a foot away and still got hum, it probably is not an issue with radiation from the transformer.
Are you getting equal V+ and V-?
PS:
Also measure resistance of amplifier ground to chassis ground for unintentional short. It should be about 10R, the cold resistance of the CL60.
If you had removed the transformer and placed it a foot away and still got hum, it probably is not an issue with radiation from the transformer.
Are you getting equal V+ and V-?
PS:
Also measure resistance of amplifier ground to chassis ground for unintentional short. It should be about 10R, the cold resistance of the CL60.
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I have tried the removal and put a tin over top. I have 19.47v from tran ,23.4v out of psu.
I get at least 10 ohm when cold .
I get at least 10 ohm when cold .
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In my mind It seems to point to the transformer . Is there a test other than voltage that can be done with a dmm. I am dreaming?
Is there a change in hum with an input connected or not?
Does it hum with the inputs shorted.
Are your input wires still the coax or did you try something else?
Does it hum with the inputs shorted.
Are your input wires still the coax or did you try something else?
No change ,and hum there when shorted. I just put the coax on today has been solid copper cat 5e till today.