Hallo McColson, thank you for the news. There something has changed in the preliminary stage. The sound examples are really great!
Grüße,
Peter
Yes the first stage produced too much bass with the 22µF bypass capacitor for the lead sound, resulting some muddy bass with big humbucker, so I have reduced it too 4µ7 and the coupling capacitor is now a 4n7 in place of the 3.3n (4n7 like the tone stack capacitor to simplify the work of Dirk ;-))
After, I have experiment to use the EF86 as triode, and the result was a good clean, slightly crunch at full volume. But to switch between triode/pentode, there was a big "plop". So I have found to add a resistor in serie with the capacitor of 100n, like that we have a pseudo triode function : less gain, clean sound, a good new feature for the G1.
But to be perfect, I use the other throw of the switch to add the originally bypass capacitor (here a 10µF added to 4µ7) to have clean with full bass.
So we have a 2 channels with a real difference in the bass response, big bass in clean and sharp sounds in lead channel, without plop, and footswitch option easily possible with a relay ;-)
The scoop switch remove some mediums near 650Hz, it's nice in both channel.
The bright switch is a nice traditional function, for crystal clean sounds.
With this amp, I have a perfect small amp, with many sound for the price of a stompboxe ! Really amazing in bedroom or studio.
I have tried it in a big 4*12 V30 during "le salon de la musique" (sort of NAMM but in france, so smaller ;-)), and this amp rocks very loud for 1W, I was even approached by T.Rex !!!
Thanks Dirk to produce a kit for this new design ;-)
I hope that german users will post some words about their G1 in our forum, with the all the brain here, this project could be a great DIY project !
Bye.
Matthieu
