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Old 23rd May 2013, 12:29 AM   #2431
Bibio is offline Bibio  Scotland
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well i'm confused again. looking at the ladder type volume i have i can't work out how to wire that thing up but i sort of have an idea so i will give 2 ways i think it goes.

there are only 3 wires on each side. one is for ground, the other is in and the other is out so does not include the negative side of the signal.

1st way:
Click the image to open in full size.

2nd way:
Click the image to open in full size.

or am i barking up the wrong tree?

Last edited by Bibio; 23rd May 2013 at 12:31 AM.
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Old 24th May 2013, 12:40 AM   #2432
rjm is offline rjm  Japan
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Something I said earlier might have led you in the wrong direction.

Neither of those diagrams is correct.

A volume control has three pins per channel, the wiper (output, pin 2), the top (input, pin 1) and bottom (common or "ground (bad)", pin 3) of the resistive element. Pin numbers are for the diagram below, not meant to refer to a specific device.

The common, as the name implies, has to connect to both the input and output returns, IN- and OUT-.

What some people forget is that the metal parts of the volume pot. must have a good connection to the circuit common also, otherwise the volume control will will pick up hum and noise. You don't normally need a dedicated wire, the connection is usually made through the front panel to the chassis, and from the chassis back to COM via the GND connection wire.
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File Type: png connection2.png (13.4 KB, 164 views)
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Old 24th May 2013, 01:38 AM   #2433
Bibio is offline Bibio  Scotland
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ahhh got ya. that makes more sense now. thanks Richard.
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Old 24th May 2013, 09:31 AM   #2434
AndrewT is offline AndrewT  Scotland
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rjm,
are the two diagrams in post2432 in your instruction manual?
If not they should be.
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Old 25th May 2013, 12:56 AM   #2435
rjm is offline rjm  Japan
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Good point. I'll add something along those lines.
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Old 27th May 2013, 09:51 PM   #2436
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Question about R1 & R2; I have a dynavector 20X2 card and from the specs of it i get:
R1= 5 ohms, R2= 166 ohms.
However i don't have these values in decent quality resistors, and also sometimes i use my old 103r for off road flea market records.
So what is wise, use the standard resistors or get some ok quality metal resistors in these values from my local electronics store?
Is there a big sonic difference?

Thanks Gerben
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Old 28th May 2013, 12:24 AM   #2437
rjm is offline rjm  Japan
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Having the correct resistance value is infinitely more important than having the correct brand/type of resistor. The dynavector is substancially different electrically from the Denon, if the phonoclone is set up correctly for one, it will not have the correct gain for the other.
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Last edited by rjm; 28th May 2013 at 12:31 AM.
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Old 28th May 2013, 08:19 PM   #2438
Bibio is offline Bibio  Scotland
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funny i was thinking of this the other day there. i had a thought of using computer motherboard jumpers with resistors soldered on then cut the jumper bar out so it would be a case of just swapping out the resistor/jumper with the values you need.

would it matter if the board had leads coming from the pins so you could rig up a remote access panel on the case or would the wire cause to much resistance?
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Old 28th May 2013, 09:10 PM   #2439
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I now solved it with dip sockets, my local electronics store had some that really snapped onto resistors.
Shame they don't make these things as single sockets instead of only rows that you have to break.. doesn't look that good but does the trick!
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Last edited by gerben00; 28th May 2013 at 09:12 PM.
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Old 28th May 2013, 09:14 PM   #2440
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And i soldered everything upside down..;-) Can't change the pics it seems.
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