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Valves Seen On Graham Slee's Desk! |
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Graham Slee
Admin Group Retired Joined: 11 Jan 2008 Location: South Yorkshire Status: Offline Points: 16298 |
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Posted: 29 Jan 2016 at 5:52pm |
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Yes, the V (or T) word has been uttered at 'Slee towers'...
And four valves complete with bases arrived today! Does this mean I've gone crazy? Does this mean I've swallowed the marketing man's pill? I hope not, but I thought I'd try and hear what all the fuss is about and have a go at building a preamp line level stage to see just how good a modern performance can be gotten out of tubes. These are 12AX7 (ECC83) and 12AU7 (ECC82) tubes suitable for preamp use, and because they are very high output impedance (100k roughly) they'll need the help of some solid-state electronics to make them usable. Often these days they're used in what's called "plate voltage starvation circuits" -- that's what all these Audiophool things that run off 12V wall-warts are about. (see: http://audio-forum.gspaudio.co.uk/low-voltage-valve-tube-buffers-hybrids-amps_topic2785.html) But I'm not into making hi-fi fuzz boxes. I want to see how low I can make their distortion and how natural they can be made to sound. |
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That none should be able to buy or sell without a smartphone and the knowledge in how to use apps
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ServerBaboon
Senior Member Joined: 16 Jan 2008 Location: NW England Status: Offline Points: 968 |
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Just be careful you don't start tube rolling, not the same as joint rolling.
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Steve
------------- Various bits of GSP Kit ..well two so far, unless you count the cables that is. |
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DaveG
Senior Member Joined: 26 Oct 2014 Location: London Status: Offline Points: 479 |
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Crazy? I couldn't possibly comment.
Swallowed the pill? hmm.. unlikely I guess And speaking of tube rolling I have some NOS early 70's Philips matched 6189 SQ's that I am more than happy to to swap for an Accession! Edited by DaveG - 29 Jan 2016 at 6:16pm |
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Dave
Michell Gorbe + HR PSU -> Cadenza Bronze -> SME V -> Elevator -> Accession -> Proprius -> B&W CM6 s2 | Cusat 50 & Spatia cables -> |
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Graham Slee
Admin Group Retired Joined: 11 Jan 2008 Location: South Yorkshire Status: Offline Points: 16298 |
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Some of the prices of 'new old stock' are frightening. The ones I bought are cheapo Chinese from RS, which will get changed (rolled) for Electro-Harmonix if it works. |
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That none should be able to buy or sell without a smartphone and the knowledge in how to use apps
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discrete badger
Senior Member Joined: 14 Jul 2009 Status: Offline Points: 479 |
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We all know what happened the last time Graham decided to "dabble" in an area of audio electronics for which he wasn't previously known!
... what happened was the Bitzie and the Majestic. |
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ICL1P
Senior Member Joined: 04 Aug 2012 Location: Faringdon, Oxon Status: Offline Points: 2341 |
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But I want a simple USB ADC with gain control for ripping by vinyl.
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Ifor
===== Reflex M & ACCESSION M, CuSat50, Majestic DAC, a Proprius pair. |
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CageyH
Senior Member Joined: 30 Apr 2012 Location: Toulouse, Franc Status: Offline Points: 1678 |
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I love the sound of my hybrid pre amp and hybrid power amp. It sounds superb, so I am really interested in what Graham can come up with.
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Kevin
European loan coordinator, based near Toulouse, France. |
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