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"WHAMMY" Pass DIY headphone amp guide
"WHAMMY" Pass DIY headphone amp guide
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Old 16th November 2018, 02:57 AM   #751
6L6 is online now 6L6  United States
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"WHAMMY" Pass DIY headphone amp guide
Bob - That looks great! Is that the chassis Cyclotronguy made? Wonderful!

It looks like you have no pot installed and it's jumpered, are you using it like a headphone power amp? Neat!

Also, what little edge mounted PCB are in front of the regulator heatsinks? A discrete reg of some sort? I'd love to know more!
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Old 16th November 2018, 04:24 AM   #752
AudioSan is offline AudioSan  Norway
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My diyadiostore boards. I did not go for the amgis or.other expencive onboard transformer. I used a 80mm cloced 30VA 18x2 V transformer. And drilled a hole right in the midle of it. (There is NO circuits undrer the the transformer.
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Old 16th November 2018, 04:45 AM   #753
AudioSan is offline AudioSan  Norway
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And lets talk about OP amps. Most have a typical operating voltage of +/-15V. And max +/-18V. At 16.8V (diode option) you are running it Close to Maximum. advantage??? A tiny bit more cuit. Is it Worth it to burn up Your AD 823??? Hell no. Run naked regulators at 15V. if you drive a set of 600ohm headfhones, Then you might get away With the higher voltage. In my case i run 80ohm. it's no dobdt. i run naked regulators and 18V transformer. that wil give me about 29V P-P and +/-8V shaving of the regulators(-1-1.3V loss in filter)
. and if the sinks are up for it, change the 10ohms for 4.7ohm to get 120mA bias insted og 64mA

Last edited by AudioSan; 16th November 2018 at 04:48 AM.
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Old 16th November 2018, 08:32 PM   #754
aheck is offline aheck
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Quote:
Originally Posted by 6L6 View Post
aheck - The original request still stands; please post well-lit, in-focus photos of your build and we'll start to look for anything that seems weird.
Thanks, hereís a look under the hood...
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Old 16th November 2018, 10:29 PM   #755
flocchini is offline flocchini  United States
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Quote:
Originally Posted by 6L6 View Post
Bob - That looks great! Is that the chassis Cyclotronguy made? Wonderful!

It looks like you have no pot installed and it's jumpered, are you using it like a headphone power amp? Neat!

Also, what little edge mounted PCB are in front of the regulator heatsinks? A discrete reg of some sort? I'd love to know more!
Jim

Cyclotronguy did the box

Headphones are Denon HD5000s anf HiFiMan 500s

The regulators are Sparkos - had them so had to use them.

No volume control - using my XP10 to feed it.

Started with Sparkos discrete op amp - now have Muses01 - WOW
Its going to be hard to move on from Muses but will try others from my collection.

Thanks for your guidance and support

Best

Bob
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Old Yesterday, 11:01 PM   #756
bajjisw is offline bajjisw  United States
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Default Thanks everyone

I am happy with the sound.

So far, one friend has ordered a board after listening

aliexpress 1706 case. The board was just a tad small for the case. One side fit in the slots.
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