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 Valve versus transistor sound in guitar amplifiers.
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 Return to top of page · Post #: 1 · Written at 2:33:56 PM on 13 October 2025.
Fred Lever's Gravatar
 Location: Toongabbie, NSW
 Member since 19 November 2015
 Member #: 1828
 Postcount: 1387

Things are quiet in the radio and amplifier department of the workshop.
Any 'well time' I have had of late has been spent fixing the vintage Morris and doing household maintenance.
I'm sure you would all find restoring the clutch to working condition riveting.
Although there was a bit of electronics used.
I put a camera under the car fed to a monitor inside the car so I could see the movement of the clutch lever on the bell housing.
There wasn't any movement despite the pedal feeling pressure.
That was a master cylinder re-build, its very handy to see on a screen what's happening under the car while you push the pedals.
Back to electronics.
I did a bit of thinking about the oft repeated line about "valve sound".

So I did a bit of rambling about music and amplifiers.
Drawing from my experience of making dozens of different amplifiers over the years and being a failed musician ( cant read music, cant play chopsticks ) I came to some conclusions.
Note that my essay is from my point of view as an electrician making stuff.

Please feel free to comment or criticise the text!
I like it when someone that actually knows what they are talking about pulls me up on some point.

Fred.

Guitar Amplifiers - Valve vs Solid State


 
 Return to top of page · Post #: 2 · Written at 3:28:47 PM on 16 October 2025.
Brad's avatar
 Administrator
 Location: Naremburn, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 7581

Document uploaded.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 3 · Written at 5:37:11 PM on 16 October 2025.
Johnny's avatar
 Location: Hobart, TAS
 Member since 31 July 2016
 Member #: 1959
 Postcount: 589

Great article Fred.
I get my USA Fender Strat and USA first solid state 80 watt amplifier out maybe once a year, have a bit of a "plink", drive the wife silly and put it away again. No I'm not a musician but have been trying for many years.
Lots of valve and solid state amps built also.
Its all fun.
JJ


 
 Return to top of page · Post #: 4 · Written at 6:30:37 PM on 16 October 2025.
Ian Robertson's Gravatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 2667

Thank you, Fred, for an excellent essay on the subject!

When I hear an audiophool wax lyrical about his valve amplifier, I just tell him "That's not an amplifier, it's a musical instrument"!

I used to build guitar amps when I was in high school. I recall the criticism made of one of these by a guitar player: "It's too clean!"


 
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