Hi
A few years ago I bought PCBs for a MooseFet pre amp, Boozhound Labs J-fet Phono pre and the power supply board.
The Boozhound worked perfectly but couldn't get the MooseFet to work so it ended up in storage since I didn't have the time or expertise to get it working.
Recently got the MooseFet out of storage and trying to get it going. I think I have found the problem, the round pad for one of the power inputs wasn't connected to rail on PCB so hope I have managed to fix this.
I would like both preamps in same case which I am working on but need some advice on the power side. I am running the Boozhound of a Hammond 186B24 transformer using terminals 5 & 8. Terminal 7 is free which is the 24v required for the Moosefet. I am bit confused here as the MooseFet has 2 power wires going into this but there is only one tap, do I run both wires to the same single terminal or does one of the wires have to go elsewhere?
A few years ago I bought PCBs for a MooseFet pre amp, Boozhound Labs J-fet Phono pre and the power supply board.
The Boozhound worked perfectly but couldn't get the MooseFet to work so it ended up in storage since I didn't have the time or expertise to get it working.
Recently got the MooseFet out of storage and trying to get it going. I think I have found the problem, the round pad for one of the power inputs wasn't connected to rail on PCB so hope I have managed to fix this.
I would like both preamps in same case which I am working on but need some advice on the power side. I am running the Boozhound of a Hammond 186B24 transformer using terminals 5 & 8. Terminal 7 is free which is the 24v required for the Moosefet. I am bit confused here as the MooseFet has 2 power wires going into this but there is only one tap, do I run both wires to the same single terminal or does one of the wires have to go elsewhere?
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AFAICT without documentation, both boards want +24V DC. So you should not be needing more connections to the transformer.
I agree with PRR BUT the illogical logic of China in engineering terms makes no sense.
Its obvious this mains transformer was made for US/UK/EU markets .
Spade terminal "7" is actual 6 in any sane engineering circles --look at the spacing , that being the case "6" is the centre tap .
This allows two versions of full wave rectification -
1-using two power diodes -centre tap used.
2- using full 4 power diode block -- no need for a centre tap.
Two Diode Full Wave Rectifier Circuit » Electronics Notes
I put the numbering of the spade terminals at the output down to differences in engineering philosophy between the East and West,I am using old school logic..
Its obvious this mains transformer was made for US/UK/EU markets .
Spade terminal "7" is actual 6 in any sane engineering circles --look at the spacing , that being the case "6" is the centre tap .
This allows two versions of full wave rectification -
1-using two power diodes -centre tap used.
2- using full 4 power diode block -- no need for a centre tap.
Two Diode Full Wave Rectifier Circuit » Electronics Notes
I put the numbering of the spade terminals at the output down to differences in engineering philosophy between the East and West,I am using old school logic..
While made in China, THAT transformer is designed in Canada. Hammond, a long-long-time tranny house. Their engineering orders would clearly specify the terminal IDs. The Chinese are perfectly good at making the product look like the drawing.
So you are saying the terminal spacing conforms to the US/UK Standards Institutes ?
That was my point I was only saying the transformer is"universal " in its make up .
In the UK we read from left to right ,not so in many countries -
the 4 spacing's have a position with no spade terminal the centre tap should have been placed there otherwise it looks like they used the easy way out instead of conforming to the Standards Institutes.
Why call it 7 when logically its 6 they made the last space and spade terminal 8 that is correct so their own logic is confused.