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Old 19th Nov 2018, 12:53 am   #1
bikerhifinut
Octode
 
Join Date: Nov 2013
Location: Penrith, Cumbria, UK
Posts: 1,993
Default Pleasantly surprised - amp modification

I did a quick and "dirty" rework of my RH84SE EL84 SE amp.

It was always an amazingly good little thing.

But.....

It had a habit of going unstable which I eventually suspected was due to the CCS on the EL84 cathodes. Theoretically a good idea. Mostly it worked. But I'd get motorboating or sulks.

So I opened out the valve bases for octals.

Rewired it with 270R on the c athode from the 6V6 data sheet. 250V on the anode. and plugged in a pair of 6V6.

bunged it all back in a very good stereo system


and wow! unless I want metallica volume it sounds reet nice.

Just a thought, small room sensitive speakers, a couple of watts and audio nirvana. innit?

A.

Last edited by bikerhifinut; 19th Nov 2018 at 12:55 am. Reason: info
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