An Exercise in Daftness.

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SteveTheShadow
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Location: S Yorks
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Re: An Exercise in Daftness.

Unread post by SteveTheShadow » Tue Mar 26, 2019 7:11 pm

Mains transformer now has a cover:
Image
DIY NVA amplification ( roughly equivalent to NVA A60) BTE Designs passive preamp, BTE Designs Lenco L75 turntable, Rega R200 arm, Goldring E3 cartridge, NVA Phono 1
Musical Fidelity M1 DAC, AppleTV4 with Apple Music subscription, ripped CDs streamed via WD MyCloud Home Duo NAS, with PLEX media server.
Speakers - Large sealed cabs, with Fane 12-250-TC 12" full range drivers.

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wiicrackpot
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Joined: Fri Oct 04, 2013 7:49 pm
Location: Glasgow

Re: An Exercise in Daftness.

Unread post by wiicrackpot » Tue Mar 26, 2019 8:17 pm

That is lush, sit back be proud of you're work and pour yourself a large one. :guiness;
Frank...made me do it.

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Dr Bunsen Honeydew
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Location: Muppet Labs
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Re: An Exercise in Daftness.

Unread post by Dr Bunsen Honeydew » Tue Mar 26, 2019 8:25 pm

Its pink :shock:

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wiicrackpot
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Location: Glasgow

Re: An Exercise in Daftness.

Unread post by wiicrackpot » Tue Mar 26, 2019 8:27 pm

Dr Bunsen Honeydew wrote:
Tue Mar 26, 2019 8:25 pm
Its pink :shock:
Rose Gold, the 'in' colour. :grin:
Frank...made me do it.

davjam13
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Location: Newcastle upon Tyne
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Re: An Exercise in Daftness.

Unread post by davjam13 » Tue Mar 26, 2019 9:34 pm

that colour works great with the speaker baffles, the whole thing looks great!
NVA mini BMU
Clearaudio performance D.C.Turntable MCRU PSU Clearaudio Clarify arm Clearaudio Virtuoso v2 Ebony MM cartridge
Project cd box DS
Dacmagic 100
Nva BBpsu Nva phono 2 Nva p50SA pre Nva A30 pwr
Interconnects all Nva ssc
Nva ls6 speaker cable
Nva Cubettes

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Latteman
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Location: S. Yorkshire
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Re: An Exercise in Daftness.

Unread post by Latteman » Tue Mar 26, 2019 10:50 pm

Wow 👍🏼
RIP Doc
Analogue Source-
ARB Turntable & 10” dual pivot arm, Grado Reference Prestige 1 MI
Funk Firm Vector V, Acos modified tonearm, Grado Gold Prestige MI
Nva Phono 1 (external psu)
Digital Sources- Denon CEOL Piccolo, iPhone 6s
Amplification-NVA P50, A20 (x2), A60
Speakers- Diy BBCubes on Nva Stands;
Ls6, Ls5; SSP
Mini BMU

SteveTheShadow
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Joined: Thu Sep 12, 2013 5:24 pm
Location: S Yorks
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Re: An Exercise in Daftness.

Unread post by SteveTheShadow » Sat Mar 30, 2019 5:23 pm

And here is the circuit:
Image

Dead simple. The absolute antithesis of the complicated stuff I was doing last year and all the better sounding for it.
DIY NVA amplification ( roughly equivalent to NVA A60) BTE Designs passive preamp, BTE Designs Lenco L75 turntable, Rega R200 arm, Goldring E3 cartridge, NVA Phono 1
Musical Fidelity M1 DAC, AppleTV4 with Apple Music subscription, ripped CDs streamed via WD MyCloud Home Duo NAS, with PLEX media server.
Speakers - Large sealed cabs, with Fane 12-250-TC 12" full range drivers.

SteveTheShadow
Posts: 1114
Joined: Thu Sep 12, 2013 5:24 pm
Location: S Yorks
Great Britain

Re: An Exercise in Daftness.

Unread post by SteveTheShadow » Sat Apr 06, 2019 5:34 pm

I think the boxed up OTL been running long enough now not to be about to blow up, so earlier this afternoon, I did the final construction job of bypassing the output capacitors. It says 6.8uF on the schematic, but I'm buggered if I can find any of the four I allegedly have.
So improvising a bit, I used the best alternatives I had, as the bypasses. These are a pair of big, 600V, 0.47uF, Jupiter, Red Astron "molded" guitar amp capacitors across the cheapo nonedescript 6800uF 63V main output caps. I'd used the Jupiters previously in the pink 2A3 SET to give the a nice fat vintage tone I like for my '60s music.

Fookin 'ell them Jupiters are great on bypass duty. Nice vocal tone, good treble speed and midrange clarity, all mixed up together in just the right proportions for my aging lugholes. No nasties IOW.......Niiice....
DIY NVA amplification ( roughly equivalent to NVA A60) BTE Designs passive preamp, BTE Designs Lenco L75 turntable, Rega R200 arm, Goldring E3 cartridge, NVA Phono 1
Musical Fidelity M1 DAC, AppleTV4 with Apple Music subscription, ripped CDs streamed via WD MyCloud Home Duo NAS, with PLEX media server.
Speakers - Large sealed cabs, with Fane 12-250-TC 12" full range drivers.

SteveTheShadow
Posts: 1114
Joined: Thu Sep 12, 2013 5:24 pm
Location: S Yorks
Great Britain

Re: An Exercise in Daftness.

Unread post by SteveTheShadow » Sat Apr 06, 2019 5:36 pm

And a couple hours down the line and the OTL is putting out some fab tone. These Jupiter Astron caps have not been used for a couple of years, so I suspect, they needed a thorough warming through in order to show once again, their true colours. Well they certainly get warmed through in this amp :).
The sound has really fleshed out now. I'm getting a lovely, full fat, saturated sound. It's doing the "King Tone" thing like a champ. Music all the way!
DIY NVA amplification ( roughly equivalent to NVA A60) BTE Designs passive preamp, BTE Designs Lenco L75 turntable, Rega R200 arm, Goldring E3 cartridge, NVA Phono 1
Musical Fidelity M1 DAC, AppleTV4 with Apple Music subscription, ripped CDs streamed via WD MyCloud Home Duo NAS, with PLEX media server.
Speakers - Large sealed cabs, with Fane 12-250-TC 12" full range drivers.

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