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The YARRA Preamplifier/HPA for Melbourne DB Group Buy
The YARRA Preamplifier/HPA for Melbourne DB Group Buy
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Old Yesterday, 07:15 PM   #431
xrk971 is online now xrk971  United States
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The YARRA Preamplifier/HPA for Melbourne DB Group Buy
Nice, 14 actives!?

Can you post your schematic here as well JP?
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Old Yesterday, 07:40 PM   #432
xrk971 is online now xrk971  United States
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The YARRA Preamplifier/HPA for Melbourne DB Group Buy
I tried looking around briefly but could not find any data on harmonic distortion profile, noise floor, etc. what is the signature of this amp? Looks like differential FET input stage with lots of CCS’s and a bipolar push-pull output.
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Old Yesterday, 08:25 PM   #433
JPS64 is offline JPS64  Germany
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Hi X,


post #10 from Wayne's BA 2018 linestage


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Old Yesterday, 08:51 PM   #434
xrk971 is online now xrk971  United States
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Thanks, but don’t see FFT of harmonic profile in there.
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Old Yesterday, 10:12 PM   #435
bk856er is offline bk856er  United States
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The YARRA Preamplifier/HPA for Melbourne DB Group Buy
Any thoughts on PS transformer voltage rating for preamp-only use and possible future alternate modules, i.e., maximum flexibility? Was planning on 25VA/18V...

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Old Yesterday, 10:31 PM   #436
xrk971 is online now xrk971  United States
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25VA/18v is fine for general purpose preamp. If you want to drive a 0dB gain amp like F4 to clipping, you will need the 22v version.
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Old Today, 06:32 AM   #437
meanie is offline meanie  Singapore
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Can the Yarra Preamp be configured to swing the Edcor audio transformer directly thru a coupling cap in the M2X, without using a daughter card?
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Old Today, 06:50 AM   #438
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Can the Yarra Preamp be configured to swing the Edcor audio transformer directly thru a coupling cap in the M2X, without using a daughter card?
Yes, I believe so. I have done that before with the Aksa lender which is the single rail version of the Melbourne (and I have completely bypassed the Edcor as well). It works fine and indeed, the Melbourne core (the amp in Yarra) was desgined to drive the 600ohm load that the Edcore presents.
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Old Today, 06:55 AM   #439
meanie is offline meanie  Singapore
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Yessss !

That makes it alot easier for me, i just need to concentrate on the Yarra build up now.
Totally happy with my M2x, and now i can do away with those daughter cards.

Thanks !
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