An Exercise in Daftness.

A place for DIY project discussions.
Forum rules
1. No ad-hominem
2. No spamming or shilling
User avatar
wiicrackpot
Posts: 765
Joined: Fri Oct 04, 2013 7:49 pm
Location: Glasgow

Re: An Exercise in Daftness.

Unread post by wiicrackpot » Thu Mar 21, 2019 7:01 pm

Ooops...i've done it again Steve, wink..wink.. :mrgreen:,

Seriously nice looking amp,i likey a lot, are you gonna leave the transformer uncovered?,
not that it's ugly but would be nicer to enclose in a chrome cover to reflect the valve glow,
my opinion of course. :grin:
Frank...made me do it.

User avatar
Dr Bunsen Honeydew
Posts: 31011
Joined: Wed Jul 11, 2012 7:26 pm
Location: Muppet Labs
Great Britain

Re: An Exercise in Daftness.

Unread post by Dr Bunsen Honeydew » Thu Mar 21, 2019 7:04 pm

Its going to have decorated cake tin over it :mrgreen:

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 » Fri Mar 22, 2019 11:37 pm

Finished it this afternoon.
Image

I threw caution to the wind and just connected it up, let the heaters warm through for five minutes then threw the HT switch with a long stick.

It lives! It plays! There is no hum! Wahay! :mrgreen:
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.

setting son
Posts: 110
Joined: Mon Aug 25, 2014 2:51 pm
Great Britain

Re: An Exercise in Daftness.

Unread post by setting son » Sat Mar 23, 2019 1:14 am

Nice. Well done, sir.

User avatar
wiicrackpot
Posts: 765
Joined: Fri Oct 04, 2013 7:49 pm
Location: Glasgow

Re: An Exercise in Daftness.

Unread post by wiicrackpot » Sat Mar 23, 2019 7:31 am

The talent on show is fantastic, whats the thought on the Doc's cake tin lid?,
will it melt if you played ''MacArthur's Park'' i wonder?. :lol:
Frank...made me do it.

User avatar
Firebug1
Posts: 373
Joined: Thu Nov 20, 2014 5:07 am
Finland

Re: An Exercise in Daftness.

Unread post by Firebug1 » Sat Mar 23, 2019 7:44 am

Is bigger always better? :mrgreen:
Rega\Teac\NVA\SA Mantra30\ATH-A900X
...the Gods you worship are steel, at the altar of rock 'n' roll you kneel...

User avatar
Lindsayt
Posts: 2736
Joined: Fri Jul 13, 2012 9:06 pm
Marshall Islands

Re: An Exercise in Daftness.

Unread post by Lindsayt » Sat Mar 23, 2019 9:34 am

Any photos of the inside, now that it's in a working state?

And how does it sound compared to your existing amplification?

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 Mar 23, 2019 10:11 am

Cheers chaps,
I'll put some pics up of the inside later on. It's not going to be a pic of neat wiring looms as I gave up on that years ago. All you get with tied in looms is increased stray capacitance, which can cause weird phenomena, ranging from poor HF response to RF pickup.
It's simply point to point with a couple of nice PCBs for the driver stages, designed by my forum colleague Ray, on Audio-Talk. The small signal tubes are DC heated from a DIYHiFiSupply module.
I'll talk about the sound later on.
Last edited by SteveTheShadow on Sat Mar 23, 2019 10:35 am, edited 1 time in total.
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.

User avatar
Latteman
Posts: 343
Joined: Tue Aug 14, 2018 7:20 pm
Location: S. Yorkshire
Great Britain

Re: An Exercise in Daftness.

Unread post by Latteman » Sat Mar 23, 2019 10:32 am

SteveTheShadow wrote:
Fri Mar 22, 2019 11:37 pm
Finished then threw the HT switch with a long stick.
😂 done that before 👍🏼
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
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 Mar 23, 2019 12:25 pm

Latteman wrote:
Sat Mar 23, 2019 10:32 am
SteveTheShadow wrote:
Fri Mar 22, 2019 11:37 pm
Finished then threw the HT switch with a long stick.
😂 done that before 👍🏼
Oh yes!
I was taught years ago that on first switch on, in the absence of a variac, the first assumption you make is that the amplifier will explode. :lol:

The insides:
Image
Not a pretty sight, but there is no hum or noise.
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.

Post Reply