http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=310014259042
and
http://www.jarl.or.jp/Japanese/2_Joho/gakken-tube-amp/making-tube-amp.htm
Err.... what what whaaa????
Charles.
and
http://www.jarl.or.jp/Japanese/2_Joho/gakken-tube-amp/making-tube-amp.htm
Err.... what what whaaa????
Charles.
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
Very low output from 2P3 and 1B2 tubes.
I think the batteries would last about 15mins.
I like the DIY horns !!
Andy
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? (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.
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.
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
Sal Brisindi
Interesting...
My estimation: About 150mW per channel.
But through those speakers, it may sound loud......
diegot said:
My estimation: About 150mW per channel.
But through those speakers, it may sound loud......
Re: Interesting...
For such power it should have an anode battery, or at least a voltage converter.
dhaen said:
For such power it should have an anode battery, or at least a voltage converter.
No, in the pics you can see thats where the batteries go.
Intriguing that, would love to have a listen!
Fran
Intriguing that, would love to have a listen!
Fran
djQUAN said:
I think you may be correct - the silver box. The battery positions are behind that.
Andy
woodturner-fran said:
I meant the pic of the bare PCB.
the little rectangular box between the volume pot and batt area.
Quote:
Caution!:Vacuum tube in this kit are made in China more than 30 years ago.It is not acceptable to return the tubes because of scratches or something.
🙂
Caution!:Vacuum tube in this kit are made in China more than 30 years ago.It is not acceptable to return the tubes because of scratches or something.
🙂
Cal Weldon said:
Isn't NOS meant to be a selling point ?
Or are they used, hence the straightener included ?
What are the tubes anyway?
I cannot find a reference. (maybe I did not try hard enough!)
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