Sounds like (excuse the pun) the design was a bit compromised in ratings, or near max dissipations.
I like to de-rate as much as possible so as to keep temperatures low and ensure very long lifetimes.
Sounds like (excuse the pun) the design was a bit compromised in ratings, or near max dissipations.
I like to de-rate as much as possible so as to keep temperatures low and ensure very long lifetimes.
Location: East Riding of Yorkshire these days
Posts: 4,779
I'm Shaun.
That was not typical of valve gear even back before that. One example, AKAI reel to reel tape recorders started out with valve amps in them. I have seen 4 examples in recent years that turn on a still work perfectly. The seldom needed any servicing in the day (except for mechanical things). Nice sounding little valve amps btw.
I have played valve guitar amps all my life, and gear like that gets totally thrashed. Loaded up in trucks and carted around, and played at 110% on stage. Other than replacing output valves occasionally, or a fuse, I can remember having to do an actual repair maybe three times in 40 years on either my amp, or other band members amps. Once the bias resistors on the output cooked, and once, and resistor in the power supply went o/c. One other time on an amp from the 1950s an electro cap spat is guts messy but easy to fix.
No valves are not as reliable as SS, but they aren't all that bad either. A well designed hifi amp should be good for the lifetime of the valves (which is longer than many believe) a few times over.
Location: East Riding of Yorkshire these days
Posts: 4,779
I'm Shaun.
Possibly not as reliable as solid state amps but then solid state amps are not going to compete on sound quality.
There is a giant John wood amp in the classifieds. Should do u
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Slippery slope all this valve stuff I’ve had loads and it’s all down to personnel prefence and of course symmetry , If you don’t want to change your speakers then perhaps go the valve pre route to start with.
I have a pair of Audio Note AZ2 floor standers here and a pair of Audio note Zero power amps that you are welcome to have a listen to as we live in the same county , the speakers are excellent sounding and built for valves but the Amps won’t drive your speakers
Jon
A person who never made a mistake never tried anything new.
Set up
Lafayette el84 power amp , Audio note M1 pre , Tannoy Sterlings, Garrard 301 , SME 3012 , puresound P10, Ortofon SPU, Cambridge CXN streamer
Micro mega Duo 3 cd transport ,
Have you looked at the World Design web page ? (http://www.world-designs.co.uk/products.htm).. The KEL84 is regarded as a 'giant-killer' and can be purchased in kit form or already made.
(I have just built the KEL84XL kit).
The owner (Matthew Snell is an absolute delight - very helpful).
Location: East Riding of Yorkshire these days
Posts: 4,779
I'm Shaun.