Originally Posted by
tubehunter
Hi Dave
No I didn't build this one, but have built this model before.
The amp is fairly old and I just replaced the psu caps.Think I upgraded them and increased the capacity.
Yes valves are the only valid way of enjoying music.
Hi Duncan, thanks for the info. That's a lovely photo. I love the blue glow, very sexy.
I've had a look inside and I can see that it's the original spec with the exception of the power caps. I'm starting to make a list of tweaks starting with the power amp conversion. I'll then probably try new coupling caps.
I noticed that the ECF80's have a non-regulated DC heater supply and the EL84's an AC heater supply. Does anyone think upgrading either of these to regulated DC might provide any benefits? Other than that I've read that the cathode caps can be upgraded along with a few of the other caps. Feedback can also be reduced but I don't know what difference that will make. Then of course I could try upgrading the valves but as the current ones a new I'll probably leave that for a while.
I think I'll just gradually try a few of the above and see what improvements can be made. It should be a good learning process.
Originally Posted by
Ali Tait
I found it very worthwhile changing the coupling caps im my KEL. Easy to do and makes a big difference IMHO. I put ClarityCaps in mine when I had it, and I found them a big improvement. Not expensive either.
Thanks Ali,
I've heard ClarityCaps are supposed to be good. Mundorf Supreme's (non silver) are also supposed to be good vallue and I've seen some Russian Teflon caps on ebay that aren't too expensive. I know Teflon caps are theoretically the best but I don't know if they'll be any better than polyprop's in this application.
Source: Apple TV 4K - DAC: Beresford Bushmaster Mk II - Preamp: CI AudioPLC-1 Mk II - Power Amps: Musical Fidelity 550K mono blocks - Speakers: Wharfedale Opus 3 - Cables: Mark Grant etc - Misc: Belkin PF30 mains filters.