5E3 Double Cap voltage question.

[showbander]

Hi all...right i am definitely gonna build the 5e3 double after much pondering.
Firstly on the diagram it dont give the voltages of the caps.
I was wondering if one of you kind people would let me know what they should be please as i cant suss it ! Good start eh
Thankyou.

[showbander]

Let me know if i'm wrong about what i have written on the digram . Cheers

[martin manning]

For the large filters 450V is good, the 0.022 with a ? Should be 630V like the other coupling caps, and the two 25uF cathode bypass caps can be 25V-50V.

[showbander]

thanks martin! will 500v for the big caps be ok as i can only seem to source them here in uk ....and only at 47- 22 - 16.
cheers .

[martin manning]

A higher voltage rating is fine. For the values they are not that critical so if you are within 20% or so you can call it good.

[overtone]

showbander the value of the bias resistor, first left, is usually around 250 Oms.
100R would bias 6V6 too hot, but maybe I'm missing something in your plan.
There a few other variations from the standard tweed 5E3 circuit there. Is that what you want?

[showbander]

tbh Overtone i just found the ceriatone layout and pasted the turret board here so i was gonna copy that....I did wanna keep close to the 5e3 as poss but with the 4 6v6s tho.
thanks

[showbander]

this is the layout i found on Weber !

[Structo]

Four 4 6V6 tubes that should work.

[showbander]

i read somewhere that resistor may get hot...but i found this other bias option on weber schematic....what dya reckon stick with the 100r 25 watt...well i dont understand the other option anyway so maybe build to the original layout & see if i get any probs !
Thanks for all the input people

[showbander]

i read somewhere that resistor may get hot...but i found this other bias option on weber schematic....what dya reckon stick with the 100r 25 watt...well i dont understand the other option anyway so maybe build to the original layout & see if i get any probs !
Thanks for all the input people

[overtone]

Aha. Now I see the whole context and things are clearer:

In this case, that 100R is not the bias resistor at all!
It is drawn where the bias resistor would be in a true 5E3. In both diagrams the bias resistor is shown as 150R.

For a 6V6 quad the 150R bias resistor is where I would start off too.

[showbander]

hey all thanks for all the help and suggestions .. i was wondering what changes i would need to do to add a glass rectifier in place of the copper cap as in diagram the cc isnt run from filament ? , could someone please enlighten me or could i drop the right glass straight in ...thanks

[martin manning]

The copper cap is a drop-in replacement for a vacuum rectifier. The schematic shows 5VAC rectifier filament winding connected to pins 8 and 2 of the rectifier socket, so just plug in a GZ34 or 5AR4.

[showbander]

Thanks again Martin !