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Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

LDR Pre MkII - LDR volume control and I/O switching
LDR Pre MkII - LDR volume control and I/O switching
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Old 15th August 2019, 07:51 AM   #241
ernesternest is offline ernesternest  Europe
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LDR Pre MkII - LDR volume control and I/O switching
Niss-man,

my measurements match yours, means I get pretty much the same plots and I would be highly interested in an option to reduce these effects.

Cheers, Ernst
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Old 15th August 2019, 09:53 AM   #242
niss_man is offline niss_man  Australia
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Originally Posted by ernesternest View Post
Niss-man,

my measurements match yours, means I get pretty much the same plots and I would be highly interested in an option to reduce these effects.

Cheers, Ernst
It's good to see someone else sees the same as I do.
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Old 15th August 2019, 01:31 PM   #243
zdr is offline zdr  Belgium
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Did you try moving psu away from main board?
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Old 15th August 2019, 06:30 PM   #244
ernesternest is offline ernesternest  Europe
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LDR Pre MkII - LDR volume control and I/O switching
Ned, no I didn't but might try this next week. My old and my new LDR show the same behavior. Both are in similar small chassis, which give a nice format.

Cheers
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Old 16th August 2019, 12:06 AM   #245
niss_man is offline niss_man  Australia
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Did you try moving psu away from main board?
Yes. That was one of the first things I did. It made no difference.
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Old 17th August 2019, 02:08 AM   #246
niss_man is offline niss_man  Australia
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When I get around to it, I will build an ldr pre in its simplest form to get some comparisons.
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Old 26th August 2019, 03:13 PM   #247
zdr is offline zdr  Belgium
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I tested my system. My ldr pre is built into same chassis with RMI-FC100. I hear very faint transformer buzzing when I press my ear against the mid bass driver, but itís the same on all volume positions, including 50 (max). I donít even have ps grounded to chassis. I think that what I hear is coming from amp PS, as I donít really use audio transformers. I will test more.
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Old 29th August 2019, 02:44 PM   #248
zajin is offline zajin
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What an awesome project! I have read through the whole original thread and now this one, and I want to build one myself.
One question: Is this fully operable without a remote? I don't want to buy a remote just for config, the unit will be placed on my desk anyway.
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Old 29th August 2019, 03:07 PM   #249
zdr is offline zdr  Belgium
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Originally Posted by zajin View Post
What an awesome project! I have read through the whole original thread and now this one, and I want to build one myself.
One question: Is this fully operable without a remote? I don't want to buy a remote just for config, the unit will be placed on my desk anyway.
It's fully operable either by a remote or encoder.
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Old 2nd September 2019, 10:01 AM   #250
zajin is offline zajin
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It's fully operable either by a remote or encoder.
Thanks! Will order one shortly.
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