Single ended at 24Vcc 1+1W @ 8 ohm - three tubes

pilovis · 09:03 PM

My new project

The performances are incredibly good in spite of such a low supply voltage.

Tubes: one 12FQ7 (or ECC82 with lower gain) and two PL504

PL504

ECC82 - 12FQ7

dhaen · 13th January 2012, 09:03 PM

Interesting concept. What are you using as output transformers? I wondered about 100v line transformers...

Edit: of course they're not gapped doh...

pilovis · 09:11 PM

You can use Audio Transformers 600/8 ohm impedance (best results), or if you accept a little bit more distorsion and lower bandwidth, you can use line transformers 220/24 Vac not less than 35W power each.

DF96 · 13th January 2012, 09:10 PM

Sorry to be dumb, but what is the point? You wanted to run a valve amp from the 24V battery supply of a lorry?

pilovis · 09:31 PM

I use it connected to my laptop that has 24 Vcc power supply.
Laptop tube amp.
It still works quite well at 19Vcc (Acer Laptop), but it is better to use a dedicated laptop universal power supply at 24Vcc.

pilovis · 09:32 PM

you could also use it at 12Vcc with a CC 2 CC car voltage doubler (12to24)

gcwills · 13th January 2012, 09:33 PM

Well done Pilovis - Creative approach with your amp

Printer2 · 13th January 2012, 10:02 PM

Quote:

Originally Posted by DF96

Sorry to be dumb, but what is the point?

Because we can?

DF96 · 13th January 2012, 10:28 PM

OK, each to their own!

gcwills · 13th January 2012, 10:29 PM

Any photos of your amp Pilovis?

13th January 2012, 08:45 PM	#1
pilovis diyAudio Member Join Date: Jan 2012 Location: Ovada - Italy	Single ended at 24Vcc 1+1W @ 8 ohm - three tubes My new project The performances are incredibly good in spite of such a low supply voltage. Tubes: one 12FQ7 (or ECC82 with lower gain) and two PL504 PL504 ECC82 - 12FQ7 Last edited by pilovis; 13th January 2012 at 09:03 PM.

13th January 2012, 09:07 PM	#3
pilovis diyAudio Member Join Date: Jan 2012 Location: Ovada - Italy	You can use Audio Transformers 600/8 ohm impedance (best results), or if you accept a little bit more distorsion and lower bandwidth, you can use line transformers 220/24 Vac not less than 35W power each. Last edited by pilovis; 13th January 2012 at 09:11 PM.

13th January 2012, 09:15 PM	#5
pilovis diyAudio Member Join Date: Jan 2012 Location: Ovada - Italy	I use it connected to my laptop that has 24 Vcc power supply. Laptop tube amp. It still works quite well at 19Vcc (Acer Laptop), but it is better to use a dedicated laptop universal power supply at 24Vcc. Last edited by pilovis; 13th January 2012 at 09:31 PM.

13th January 2012, 09:19 PM	#6
pilovis diyAudio Member Join Date: Jan 2012 Location: Ovada - Italy	you could also use it at 12Vcc with a CC 2 CC car voltage doubler (12to24) Last edited by pilovis; 13th January 2012 at 09:32 PM.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

13th January 2012, 09:03 PM	#2
dhaen diyAudio Moderator Emeritus Join Date: Jun 2002 Location: U.K.	Interesting concept. What are you using as output transformers? I wondered about 100v line transformers... Edit: of course they're not gapped doh...

13th January 2012, 09:10 PM	#4
DF96 diyAudio Member Join Date: May 2007	Sorry to be dumb, but what is the point? You wanted to run a valve amp from the 24V battery supply of a lorry?

13th January 2012, 09:33 PM	#7
gcwills diyAudio Member Join Date: Jan 2010	Well done Pilovis - Creative approach with your amp

13th January 2012, 10:28 PM	#9
DF96 diyAudio Member Join Date: May 2007	OK, each to their own!

13th January 2012, 10:29 PM	#10
gcwills diyAudio Member Join Date: Jan 2010	Any photos of your amp Pilovis?

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
813 RCA amplifier - 25w, class A1, single ended,2 tubes,Rout~1ohm	audiodesign	Tubes / Valves	5	19th September 2010 07:34 PM
VR tubes in single ended circuits	Jeb-D.	Tubes / Valves	1	4th February 2009 12:31 AM
Single Ended Amp 8 Ohm To 4 Ohm Conversion	jsaults	Parts	11	21st February 2007 01:00 PM
FS: 300b single ended stereo amp w/tubes	Magnetmaz	Swap Meet	1	21st July 2004 04:31 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read