6A5G SET Rebuild - Pics!

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L0rdGwyn

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6A5G SET Rebuild - Pics!
« on: 12 Oct 2020, 02:40 am »
After joining AC, I haven't posted much!  I am big on tube DIY, I am always working on something...a month or two ago I rebuilt one of my SET amplifiers.  Here are some highlights on the build.

Lundahl LL1648 mains transformer
GEC U18/20 rectifier
Passive CLCLCRC power supply with Lundahl chokes, Clarity Caps
MH4 / AC/HL / REN904 input tubes with DC heater regulators, CCS load, Riken carbon film cathode resistors (unbypassed)
Miflex Copper Foil PIO coupling caps
6A5G output tubes, Mills MRA-10 cathode resistors, Clarity Cap ESA bypass caps
Lundahl LL1620 output transformers
Goldpoint V47 stepped attenuator

I had the chassis machined to my design by Landfall Systems, then powder coated it myself in "Stage Pass Bronze" from Prismatic Powders.  The 6A5G is an indirectly heated triode, cousin to the 2A3, this is roughly a 3.5W amplifier.

Here are some pictures.












And with the Mazda AC/HL drivers.



And with my Snell J/II.




Thanks for looking, I have multiple other projects underway, I have a DIY thread where I post everything I am working on on the headphone forum Head-Fi, if people are interested I will share them on AC when they are done  :D

FullRangeMan

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Re: 6A5G SET Rebuild - Pics!
« Reply #1 on: 12 Oct 2020, 02:58 am »
Great amp, certainly we are very interested :thumb:

These Lundahl transformers cases are plástic or alumínum  ?

opnly bafld

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Re: 6A5G SET Rebuild - Pics!
« Reply #2 on: 12 Oct 2020, 03:21 am »
Nice looking amp; how does it do with the J/IIs?

L0rdGwyn

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Re: 6A5G SET Rebuild - Pics!
« Reply #3 on: 12 Oct 2020, 03:34 am »
Thanks!  Very well I think, plenty of volume in my listening room with headroom to spare :green: nice deep impactful midbass and great staging from the Snells.