$120 battery powered tube amp on eBay??

ChopperCharles · 17th January 2008, 06:38 AM

http://cgi.ebay.com/ws/eBayISAPI.dll...m=310014259042
and
http://www.jarl.or.jp/Japanese/2_Joh...g-tube-amp.htm

Err.... what what whaaa????

Charles.

Colt45 · 17th January 2008, 06:45 AM

Never heard of battery tubes?

output is probably ~0 though.

poynton · 17th January 2008, 07:40 AM

It's really only a tube headphone amp for the Ipod !

Very low output from 2P3 and 1B2 tubes.

I think the batteries would last about 15mins.

I like the DIY horns !!

Andy

diegot · 17th January 2008, 10:43 AM

Just 3V! What is the output power?
It`s a very interesting kit with a good price.

kstagger · 17th January 2008, 11:40 AM

very neat... would make a good closet apartment stereo system

ChopperCharles · 17th January 2008, 01:59 PM

Wiring a wall transformer to this amp would be dirt simple... but... how much voltage? Would more input voltage make the amp more useful? (read

owerful)

It looks like it'd be a fun little project to take a cheap low power amp like this and build it into an iPod amp. Replace the faux center transformer cover / battery case with a dock, and paint the whole thing gloss black to match my nano. Not exactly high end audio, but it'd look sweet.

Hell... if this thing could be built into a decent phono preamp it would actually be quite useful.

But really, I get ahead of myself. I'd love to buy it and tinker, but I'm a total Toob Noob... I know enough about electronics not to fry myself, and while adding a wall transformer plug, input selector switch, and an iPod docking station is well within my capabilities, actually modifying the amplifier circuit (or even trouble shooting) is not.

Charles.

Sal Brisindi · 17th January 2008, 03:02 PM

I have a schematic that uses 1S4 output tubes and 2 1.5volt batteries. It has an simple inverter to create the B+.

Sal Brisindi

poynton · 17th January 2008, 03:27 PM

Quote:

Originally posted by Sal Brisindi
I have a schematic that uses 1S4 output tubes and 2 1.5volt batteries. It has an simple inverter to create the B+.

Sal Brisindi

Please post the circuit.

dhaen · 17th January 2008, 07:55 PM

Quote:

Originally posted by diegot
Just 3V! What is the output power?
It`s a very interesting kit with a good price.

My estimation: About 150mW per channel.
But through those speakers, it may sound loud......

Wavebourn · 17th January 2008, 08:54 PM

Quote:

Originally posted by dhaen

My estimation: About 150mW per channel.
But through those speakers, it may sound loud......

For such power it should have an anode battery, or at least a voltage converter.

17th January 2008, 06:38 AM	#1
ChopperCharles diyAudio Member Join Date: Jan 2008	$120 battery powered tube amp on eBay?? http://cgi.ebay.com/ws/eBayISAPI.dll...m=310014259042 and http://www.jarl.or.jp/Japanese/2_Joh...g-tube-amp.htm Err.... what what whaaa???? Charles.

17th January 2008, 01:59 PM	#6
ChopperCharles diyAudio Member Join Date: Jan 2008	Possible to up the power? Wiring a wall transformer to this amp would be dirt simple... but... how much voltage? Would more input voltage make the amp more useful? (readowerful) It looks like it'd be a fun little project to take a cheap low power amp like this and build it into an iPod amp. Replace the faux center transformer cover / battery case with a dock, and paint the whole thing gloss black to match my nano. Not exactly high end audio, but it'd look sweet. Hell... if this thing could be built into a decent phono preamp it would actually be quite useful. But really, I get ahead of myself. I'd love to buy it and tinker, but I'm a total Toob Noob... I know enough about electronics not to fry myself, and while adding a wall transformer plug, input selector switch, and an iPod docking station is well within my capabilities, actually modifying the amplifier circuit (or even trouble shooting) is not. Charles.

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17th January 2008, 06:45 AM	#2
Colt45 diyAudio Member Join Date: Feb 2002 Location: Canada	Never heard of battery tubes? output is probably ~0 though.

17th January 2008, 07:40 AM	#3
poynton Magneto the Gravity Man diyAudio Member Join Date: Mar 2005 Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)	It's really only a tube headphone amp for the Ipod ! Very low output from 2P3 and 1B2 tubes. I think the batteries would last about 15mins. I like the DIY horns !! Andy

17th January 2008, 10:43 AM	#4
diegot diyAudio Member Join Date: Sep 2004 Location: Brazil	Just 3V! What is the output power? It`s a very interesting kit with a good price.

17th January 2008, 11:40 AM	#5
kstagger diyAudio Member Join Date: Dec 2003 Location: Grand Rapids	very neat... would make a good closet apartment stereo system

17th January 2008, 03:02 PM	#7
Sal Brisindi diyAudio Member Join Date: Nov 2006	I have a schematic that uses 1S4 output tubes and 2 1.5volt batteries. It has an simple inverter to create the B+. Sal Brisindi

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