Very, very few circuits are based on the WE404 dual triodes. There's ONE schematic i saw ala Foreplay, and NO schematic as a driver stage.
Can you help me understand why is it so?
I'm whining
because i have lots of these Western Electric tubes and i can't use them 
Can you help me understand why is it so?
I'm whining
because i have lots of these Western Electric tubes and i can't use them 
yes frank, that's exactly what i have and have that tube spec sitting on my hard drive for the longest time 
for the mentally challenged (read: lazy
) person i am, i'd rather build one based on a proven circuit and tubecad does not have this tube i did try to enter the tube params though, got some figures, i just don't know if it'll work.
but what the heck, give it a try huh! 20V heaters here i come
for the mentally challenged (read: lazy
) person i am, i'd rather build one based on a proven circuit and tubecad does not have this tube i did try to enter the tube params though, got some figures, i just don't know if it'll work.but what the heck, give it a try huh! 20V heaters here i come
arnoldc said:but what the heck, give it a try huh! 20V heaters here i come
That's the spirit
An externally hosted image should be here but it was not working when we last tested it.
If there is no WE404 amp schematic's out there, it just means you haven't put them there yet 😎
arnoldc said:yes frank, that's exactly what i have and have that tube spec sitting on my hard drive for the longest time
[...]
but what the heck, give it a try huh! 20V heaters here i come
Check the pdf again. Are you SURE the heater's 20 volts?
Francois.
DSP_Geek said:
hi francois, thank you for waking me up
my post should have been about the WE407! but i also have a bunch of WE404!
Hi,
Regarding the WE404A/5847 :
Sound Practices issue # 14 has a circuit by
J.C. Morrison using that tube as a voltage amplifier for a PSE amp.
using a pair of 6FW5s.
Screengrid of the 404A is regulated by a stack of Zener diodes and 1/2 of a 6922.
The stage itself is an SRPP style totem with the 404A on the bottom, the other half of the 6922 on top.
Cheers, 😉
Regarding the WE404A/5847 :
Sound Practices issue # 14 has a circuit by
J.C. Morrison using that tube as a voltage amplifier for a PSE amp.
using a pair of 6FW5s.
Screengrid of the 404A is regulated by a stack of Zener diodes and 1/2 of a 6922.
The stage itself is an SRPP style totem with the 404A on the bottom, the other half of the 6922 on top.
Cheers, 😉
I built this small amp using a 5670 some time ago:arnoldc said:
I mostly built it for fun just to see if I could squeeze a tube preamp, input selector, power supply and remote control together on one euroboard (16*10cm). As you can see I did it 😀
Best regards,
Mikkel C. Simonsen
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