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2Ж27Л - 4Ж1Л - 12Ж1Л - 4П1Л - How to use ??
2Ж27Л - 4Ж1Л - 12Ж1Л - 4П1Л - How to use ??
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Old 12th June 2012, 02:56 PM   #1
Kagliostro is offline Kagliostro  Italy
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Question 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
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Old 12th June 2012, 03:24 PM   #2
Wavebourn is offline Wavebourn  United States
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2Ж27Л - 4Ж1Л - 12Ж1Л - 4П1Л - How to use ??
Here is an example:

http://www.diyaudio.com/forums/tubes...highlight=4p1l
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Old 12th June 2012, 05:40 PM   #3
kevinkr is offline kevinkr  United States
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2Ж27Л - 4Ж1Л - 12Ж1Л - 4П1Л - How to use ??
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.
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Old 12th June 2012, 06:04 PM   #4
Kagliostro is offline Kagliostro  Italy
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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

@ Kevinkr

I apologize , thanks for moving in the right section

Kagliostro
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Old 12th June 2012, 06:16 PM   #5
tinitus is offline tinitus  Europe
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2Ж27Л - 4Ж1Л - 12Ж1Л - 4П1Л - How to use ??
Quote:
Originally Posted by Kagliostro View Post
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
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Old 12th June 2012, 06:19 PM   #6
Wavebourn is offline Wavebourn  United States
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2Ж27Л - 4Ж1Л - 12Ж1Л - 4П1Л - How to use ??
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.
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Old 12th June 2012, 06:26 PM   #7
tinitus is offline tinitus  Europe
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2Ж27Л - 4Ж1Л - 12Ж1Л - 4П1Л - How to use ??
Quote:
Originally Posted by Kagliostro View Post

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
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Old 12th June 2012, 09:18 PM   #8
Kagliostro is offline Kagliostro  Italy
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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
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Old 13th June 2012, 05:18 PM   #9
Wavebourn is offline Wavebourn  United States
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2Ж27Л - 4Ж1Л - 12Ж1Л - 4П1Л - How to use ??
You can use 12Ж1Л + 4П1Л like 6SJ7 + 6V6 in Fender Champ schematic. However, you will need 2 different filament voltages.
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Old 13th June 2012, 06:37 PM   #10
Kagliostro is offline Kagliostro  Italy
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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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