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Megatron Electrostatic Headphone Amplifier


kevin gilmore

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Thank you guys for the encouragement.  I left my SD card at home, but I have a few inside shot of the amp.

 

I used good quality components: Alps RK50 pot, Takman REY resistors, Solen FEP Teflon caps in the signal path, WIMA bypass caps, Nichicon Audio caps, Teflon tube sockets.

 

I made PCBs for the 300V power supply and front-end DC heater.  Transformers are from Sumr.  Chassis are ordered from eBay.

 

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niner: its always useful to learn to read a schematic. Sometimes there are things on a schematic that aren't translated to PCB artwork that are useful to know. You need to remove two capacitors on your T2 build, check the schematic for more info.

hi luvdunhill, thank you for the suggestion.  which cap I need to remove?  if you mean C12 or C13, then yes, I knew I populated both of them.  I was stuffing the board late at night, and didn't realize I put both of them on until I soldered them down.  I should remove them before I forget about it.

 

Thanks anyway!

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Temperature with the offboard external heatsinks is 56 degrees Celsius at the contact point with the transistors, about 42 degrees in the heatsink fins. Very pleased with the results. It reached 90 plus Celsius with the small onboard heat sinks.

I have not cased it yet (working on the PSU first).

The sound is to my ears moar better than the KGSSHV. Have not compared it side by side with the BHSE, but I bet they are pretty similar. Simply Stunning! :)

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Edited by eggil
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