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Old 15th December 2012, 02:11 PM   #61
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Originally Posted by vdi_nenna View Post
Sakellogg, thanks very much!
I adjust my springs using a bubble like leveling device. it has a hole to fit over the spindle and the bubble is centered in a circle visible from the top. When I have them adjusted so that I can turn the table on and the bubble stays centered as it turns, its good.

Before the above procedure, I level the table itself first, using four screws that adjust each corner of my DIY wall mounted shelf. Once I verify ( using a short level) that the shelf as well as the top of the table are level, I get out the bubble spirit type level and do the above procedure.

Russellc
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Old 17th December 2012, 09:58 PM   #62
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Default Resistor and Capacitor Load Switching

So, I'm on vacation to take care of my mom after back surgery and I had a chance between rehab visits to build the load switching circuit. It came out nice. I'm happy with it.

Si, the 1k load for the DL-110 is the way to go. From a cold start, one can tell that 47k is not correct or at least not optimal. More definition between notes and reverb that goes on forever.

Here are two photos that tell the rest of the story.

The parallel resistors are 80k, 47k, 30k, 5k, 3.3k, 2.2k, 909, 300, 150 and 100 ohms. Caps are 100pF, 150pF, 220pF, and 330pF. I was going to add a 100k also but realized the switch is a 10 DIP and not 12, like I though was purchased. I can still add it permanently to the board, if needed.

5k, 3.3k and 2.2k get 1025 Ohms. 3.3k and 2.2k gets you 995 Ohms.
I went with 1025 and doubt 995 would be much different...but who knows!

By the way, the above are meter measured readings, not calculated.

Vince
Attached Images
File Type: jpg Pearl2 Load Switching 001.jpg (144.9 KB, 184 views)
File Type: jpg Pearl2 Load Switching 002.jpg (571.3 KB, 184 views)
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Old 17th December 2012, 11:17 PM   #63
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Personally, I have found (with respect to MC loading). the lower the capacitive loading the better in terms of top end air, space and transparency. However, it also shifts the character of the bass/mid a little and makes the circuit very much more susceptible to RF interference.

Although these capacitive changes are roughly analogous to the adjustment of tone controls the actual effect is not the same and implementing tone controls is a heavy handed, and inadequate, solution as far as I am concerned.

Last edited by YNWOAN; 17th December 2012 at 11:19 PM.
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Old 17th December 2012, 11:27 PM   #64
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At this time, I have no cap load.
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Old 17th December 2012, 11:31 PM   #65
YNWOAN is offline YNWOAN  United Kingdom
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A minor point.

There is always some capacitive loading - even if it is only that of the arm cable and the accumulated circuitry.

Last edited by YNWOAN; 17th December 2012 at 11:33 PM.
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Old 18th December 2012, 12:06 AM   #66
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That's what I was counting on.
Do you think a LCR meter can pick up the capacitance of the wire and cables?
I'll try yo measure it.
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Old 18th December 2012, 01:18 AM   #67
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Way to go I N D E E D !

Boo JAH !

Hi Vince

Nice work on the loading board.
Thought you were going for a wi-fi connection at first...
...with all those little aeriels !
But no...
...fits in the Pearl as snug as a bug !

What with the Pearl PSU fix & the new 1K loading...
...sounds like the Denon should be living up to it's rep. now.
I like the sound of endless reverb...
...as long as it stops at the end of side A !

It will be interesting to hear what you think after listening to loadings either side of 1K as well.
It does from what others say seem to be 'the ball-park' on that cart...
...but you never know !

If you get the chance...
...how about some listening reports from 250r - 4k ( 4x in either direction ).

Could be interesting, especially on 'weird'pressings'...
...like ones where there are higher grooves / " ( less bass, right ).
Quite a handy, non-destructive tone-control.

Sticking a few caps across the terminals of the full-range drivers I have here...
...brings the treble down & makes 'em sound like SUBS !...
...albeit with a loss of sensitivity of course...
...but a good non-destructive speaker tone-control for sure.

Going slow @ Space Egg, but we're getting there.

Cheers.

Si.

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Old 18th December 2012, 02:17 AM   #68
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Quote:
from 250r to 4k...
I'll give it a shot.
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Old 18th December 2012, 01:11 PM   #69
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Vince...you are the Indiana Jones of high-end loading-experiments.

Keep up the good work !

Cheers.

Si.
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Old 19th December 2012, 03:38 AM   #70
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Vince...you are the Indiana Jones of high-end loading-experiments.

Keep up the good work !

Cheers.

Si.
Vince: "capacitors.....why did it have to be capacitors?"

SI: " picofarads, lots of decimal places. You go first."
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