Funny guy's 
jacco vermeulen said:
Blitz said:
Thanks for the suggestions.
How do you rework it to 4 x 15V? Is it to rewind it?
I've thought about a variac/choke, and also triac control for the AC but decided to have less parts in line with the Zen philosophy.
Also I'm not sure if using a "capacitor bridge? for a floating ground?" will work (i.e., 2 caps in series tied to 0 and 38V, tap in the middle for 0V...so I can have -19V 0V +19V... sorry I don't know the correct name for this circuit)
My question still is will I blow something up with +-38V rails? Thanks.
Thank's Steenoe ... I guess they sound like your''e abbeys, but perhaps, with a little more punch. Well theyr'e not completly finish yet, still missing final coat, edge banding and some wooden phase-plugs
They are very heavy, as i filled the room beneth with drysand (The kind used to blow paint on walls off
)Jesper.
lykkedk said:
Thank's Steenoe ... I guess they sound like your''e abbeys, but perhaps, with a little more punch. Well theyr'e not completly finish yet, still missing final coat, edge banding and some wooden phase-plugs
They are very heavy, as i filled the room beneth with drysand (The kind used to blow paint on walls off
Jesper.
Looking forward to audition them
....and nice work BTW.
Magura
Zen Mod said:
just pump the gain of Pumpie
15x (23,5db) is completely same as 10x , for Pumpie ......... but not for F4
I might just have to do that ... so, 23.5dB gain... anyway to convince me with numbers that this will make these hard to drive speakers sing loudly? Extra points for using acoustic watts
Posted by Magura:
Ahhh... Don't be so sure about that my freind
luvdunhill : Whitout being bad i would like to tell, that with the experiance i have had with my 87dB speaker's with balanced F4's, it might be, that you will be dissapointed, if you wish to play loud. Just my oppinion, nothing else! - And i am not a guru, that's for sure!!!
Jesper.
Ahhh... Don't be so sure about that my freind
luvdunhill : Whitout being bad
i would like to tell, that with the experiance i have had with my 87dB speaker's with balanced F4's, it might be, that you will be dissapointed, if you wish to play loud. Just my oppinion, nothing else! - And i am not a guru, that's for sure!!!Jesper.
lykkedk said:Posted by Magura:
Ahhh... Don't be so sure about that my freind
luvdunhill : Whitout being bad
Jesper.
Jesper:
any chance you could try upping the Pumpkin gain and giving it another go?
I tried a gainsetting at allmost 28x (150k / ~5,5k) Donno how many dB it give's...
I wasen't capable of making this work proberly, maybee it's my pcb-layout or something else, but the max gainsetting is around ~20 for my setup (homemade pcb), for prober noise/hum floor...
I must say, (Before ZenMod
) that this was not with my LeachAmp I tried begging the Master ZenMod for buying 1 of his kit's, but he's just like me
... the answer was, ''not until you fix problem 
" I kind of knew that answer, even before i tried ordering a kit... Well i belive, that you must have around 27-30x
gain with thoose speaker for driving them proberly., with a 1,5vac source.But But But remember ... i am not a guru ... Maybee it's possible with ZenMod's pumpkin pcb... i donno... ??
Jesper.