2Ж27Л - 4Ж1Л - 12Ж1Л - 4П1Л - How to use ??

[Kagliostro]

I've some of this tubes

2Ж27Л - 4Ж1Л - 12Ж1Л - 4П1Л

and I'm interested about to use for an amp (guitar amp)

So I'm looking for schematics

however any proven audio schematic using this tubes is of interest for me

Thanks

Kagliostro

[Wavebourn]

Here is an example:

One more 4P1L SE

[kevinkr]

Moving to Instruments & Amplifiers since first post specifically mentions guitar amp. Please read the headers atop both tubes/valves and Instruments & Amplifiers for the reason why. It's clearly stated.

[Kagliostro]

Hi Wavebourn

http://www.diyaudio.com/forums/tubes...highlight=4p1l

That is an interesting drawing, a bit complicated if compared to the schematics I'm used to see (guitar amp schematics, not Hi Fi amp), but interesting, many thanks for sharing

@ Kevinkr

I apologize , thanks for moving in the right section

Kagliostro

[tinitus]

Originally Posted by Kagliostro

Hi Wavebourn



....a bit complicated if compared to the schematics I'm used to see (guitar amp schematics....

not really....if you know what you are looking at

[Wavebourn]

Yes, for guitar amp it is no good. It is high-end amp, used in well controlled listening. Driver stage has negative swing limited by negative voltage supply, so clipping will be hard and harsh. For guitar you may use 12P17L and 12J1L similarly to Fender Champ schematic.

[tinitus]

Originally Posted by Kagliostro

I apologize , thanks for moving in the right section

Kagliostro

when you google, I suggest you try go to 'pictures'
often gives some good hits

[Kagliostro]

when you google, I suggest you try go to 'pictures'
often gives some good hits

That is a good council I often do that and .......... yes, that way I've also seen the schematic drawn by Wavebourn

About the complication at which I was referring Wavebourn has perfectly understand what I was intending (as from his answer)

about the use of 12J1L (12Ж1Л) I've one, but no 12P17L (12П17Л)

May be I can use the 12Ж1Л + 4П1Л like in this schematic, but sure I need councils as to use for guitar instead than for his original purpose
(hope someone can give indications about)

Kagliostro

[Wavebourn]

You can use 12Ж1Л + 4П1Л like 6SJ7 + 6V6 in Fender Champ schematic. However, you will need 2 different filament voltages.

[Kagliostro]

Hi Wavebourn

The direct cathode heater of the 4П1Л is confusing me

a bypass cap isn't necessary ? (Fender 5C1 6v6 cathode = 500ohm + 25mf)

Kagliostro