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-   -   2Ж27Л - 4Ж1Л - 12Ж1Л - 4П1Л - How to use ?? (http://www.diyaudio.com/forums/instruments-amps/214352-2-27-4-1-12-1-4-1-how-use.html)

Kagliostro 12th June 2012 02:56 PM

2Ж27Л - 4Ж1Л - 12Ж1Л - 4П1Л - How to use ??
 
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 12th June 2012 03:24 PM

Here is an example:

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

kevinkr 12th June 2012 05:40 PM

:cop: 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 12th June 2012 06:04 PM

Hi Wavebourn

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 :up:

@ Kevinkr

I apologize :o, thanks for moving in the right section

Kagliostro

tinitus 12th June 2012 06:16 PM

Quote:

Originally Posted by Kagliostro (Post 3057122)
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 12th June 2012 06:19 PM

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 12th June 2012 06:26 PM

Quote:

Originally Posted by Kagliostro (Post 3057122)

I apologize :o, thanks for moving in the right section

Kagliostro

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

Kagliostro 12th June 2012 09:18 PM

1 Attachment(s)
Quote:

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 13th June 2012 05:18 PM

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

Kagliostro 13th June 2012 06:37 PM

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


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