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-   -   KEL84 from the recycling centre (http://www.world-designs.co.uk/forum/showthread.php?t=7803)

bob orbell 25th October 2019 09:02 AM

Re: KEL84 from the recycling centre
 
You will be surprised at how many put the input connections the correct way in and the speaker posts the other way up :D'oh!:. Bob

YummyFuzz 13th November 2019 07:34 AM

Re: KEL84 from the recycling centre
 
2 Attachment(s)
Here are some pics of the finished project. The inside shot shows all the connectors I put in which allows me to take the PCB out in just a couple of minutes, I also put some three-terminal tag strips on each of the speaker posts as it was really hard to get a good solder connection to so much metal. Also done is the swapping of the phono jacks and speaker post red/black position, and finished off with a replacement volume knob from WD.

I love the look of it ("the fireplace" my daughter calls it), and I love the sound of it, and spend most nights listening to an album in the evening.

YummyFuzz 13th November 2019 07:36 AM

Re: KEL84 from the recycling centre
 
1 Attachment(s)
One more of the back.

bob orbell 13th November 2019 08:34 AM

Re: KEL84 from the recycling centre
 
Looks good, reminds me of mine that came out of the skip at WD, but, ALL the terminals are now upside down :D. Bob

bikerhifinut 13th November 2019 11:49 AM

Re: KEL84 from the recycling centre
 
Quote:

Originally Posted by bob orbell (Post 89982)
Looks good, reminds me of mine that came out of the skip at WD, but, ALL the terminals are now upside down :D. Bob

Just the input phonos Bob. For some bizarre reason the convention on speaker tags is red to the top.

Andy

Phil Y 13th November 2019 05:52 PM

Re: KEL84 from the recycling centre
 
I'm not sure that there is any convention for speaker terminals but if I had to express a preference it would be for + uppermost. If you search the web for images you can certainly see professionally made amps that way around. As the inputs are generally red/white denoting right and left and speakers are generally red/black denoting +/- I don't see any reason they should have red on the bottom.
+ uppermost and - lower "feels" more correct to me ☺


Phil.

Phil Y 13th November 2019 06:07 PM

Re: KEL84 from the recycling centre
 
YummyFuzz, well done for getting it working and glad to hear that you are enjoying it.

Phil.

YummyFuzz 14th November 2019 12:40 AM

Re: KEL84 from the recycling centre
 
Now I'm looking at it (and online), it does seem the convention is to have "Left" on top, and "Right" below for the inputs. So it was right the first time, and it was just the speaker posts the wrong way (as Bob would say :D'oh!:).

bikerhifinut 14th November 2019 02:56 PM

Re: KEL84 from the recycling centre
 
When I look at my commercial power amps, NOT ONE has the red speaker post at the bottom.
When one thinks on it, a red RCA socket simply indicates which stereo channel it is connected to whereas a Red binding post/speaker socket should indicate the Positive With respect to earth terminal.
I guess it doesn't matter anyway unless one is OCD about absolute phase and I personally don't think I could tell the difference as long as both channels are in phase.
Others may disagree.

A.

bob orbell 15th November 2019 09:11 AM

Re: KEL84 from the recycling centre
 
Well all of mine did :), Bob


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