Today I have mainly been V5.0 (Part 3)

That’s a very Peter Belt listening position, too … tho’ prolly for the best with all that horn rubbish honking and shrieking …

Holy shit have you been doing shrooms recently, please tell me that’s a motorbike battery for the heater supply :crazy_face:

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It just trudged up the room a little for its own safety, no turtles were harmed

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In the (to borrow a phrase) Mind Garden, those are coupling capacitors…

Have those epic Behemoths been given a name.

The divorcinators

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Big box with white wrapping and crock clips on top is the output transformer for fixed biased SE 300B, driven by self biased SE 300B, LC coupled to output. Input stage is also LC coupled, and can be 76, or 7N7 or 5842 for low, medium or high gain.
Three valve rectified choke input PSUs, one for 300Bs, one for input stage, one for negative bias supply. And a pair of tentlabs modules for 300B filaments.

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No, other than “the chopping board amps”, which lacks any form of snizzle

bet it sounds ok but it’s no NVA amp :person_shrugging:

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We can only aspire, i merely have a degree, not a doctorate.

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I recognise that phono stage and the house too.
The amps are a little bigger than my original Simon special pre🤣

Made some isolation platforms today - 400x500x2mm stainless steel, same of brass, with a 3mm layer of foamed neoprene sandwiched between, 3 off. Aside from deburring and gluing it all together, I’ve got each one grounded to Earth as well.

Flash makes everything look awful.

The reason for this hombrew-foo was discovering that removing the stone platform from beneath the CD-T (to go under a speaker…), meant that the transport and the underlying DAC started coupling all kinds of stray EMI/RFI to one-another, yielding very audible noise emenating from the speakers.

Similalrly, stacking the two amps set the massive mains transformer of the First Watt a-buzzing.

4mm of metal isn’t much to get-between such issues, but pleasingly it’s worked a treat and solved the digital noise issue, and calmed down the J2, if not eliminated the tx hum altogether.

Sounds good, too, though I accept that may just be affirmative bias.

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A sheet of blue paper would have been easier.

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Stillpoints ERS paper? It was actually derived from a commercial product and worked to reduce EMI to some extent. Of course, the price was stupid and the claims made for it stupider still. The commercial equivalent now is a thin PET film impregnated with carbon nanotubes (or even graphene) - amazed no foo merchants appear to have monetised this stuff, but it’s remarkably costly even before they get near it.

Foo only works if you pay for it, innit?

Scrumping again


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The workout was fun but the music was better! I thought your stuff sounded fabulous, and was an interesting contrast in presentation.

Deathly quiet through the 107db horns but then when the music started :ok_hand:

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Have the house to myself this morning so chillin with some tunes which for various reasons has become quite a rare event these days.

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I’m going with the SJS Monstromo

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Discovering why our main oven wasn’t working.

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