$75 tube amp kit on eBay???

jmillerdoc · 26th August 2011, 08:29 AM

Just found this at eBay....for this price it sounds like something worth looking into. I am not associated with the seller. Just want to pass along something that might interest a few here......

10 watt stereo SET tube amp kits $74.99 each | eBay

Cheers!
Jeff

Original Burnedfingers · 26th August 2011, 11:53 AM

Sorry but it looks like junk to me.

rock4016 · 26th August 2011, 12:02 PM

How it sounds would be of importance to me. You could always use your own chassis to make it look pretty.

TheGimp · 26th August 2011, 01:27 PM

"10 watt" amp that later in the text makes "4 or 5 watts" and probably will only make 3 when actually tested.

The 6DR7 (dissimilar dual Triode, 13DR7 in his) only has a plate dissipation of 7W , so even 3W out in class A is probably optimistic if distortion is to be kept low.

I have to agree it is junk.

milsman2 · 26th August 2011, 01:49 PM

Hate to be a negative nancy, but it doesn't really say much about the distortion or any other really important stats. Hum and noise may be an issue as well...

tomchr · 26th August 2011, 06:17 PM

It's probably 10 W at hard clipping if you add the power output from both channels....

To build a Spud-type SET amp even with the small $20 Edcor transformers, I'd budget around $100~$150 in parts alone. Then add chassis. So at $75, I'd be skeptical. Also, I'd like to see the circuit schematic and a parts list so I know what I'd be buying. Looks like someone is clearing out their junk box and will respond to any customer support questions after the sale in a manner along the lines of, "you assembled it wrong".

~Tom

VictoriaGuy · 26th August 2011, 06:28 PM

A 'kit' without a parts list is pretty vague and misleading.
Quote: "You don't get everything shown".

And, using davidyee as a stellar example doesn't inspire much confidence in me.

For $100 you can buy a Tubelab Simple PP board and the parts to stuff the board. Add transformers, tubes, hardware and you will have a real amp- though you will spend a lot more than $75 before you are finished.

Some things are 'just too good to be true'.

DF96 · 26th August 2011, 07:08 PM

$75 seems very cheap. If it seems too good to be true . . .

He says British 13DR7. I find that surprising for three reasons:
1. our TV sets did not generally use power triodes for frame output, but tetrodes or pentodes.
2. our TV sets used 300mA series heater strings, not 450mA.
3. there does not appear to be a European name (YCC8x, YCC18x etc.) for it.

Still, I've been wrong before!

26th August 2011, 08:29 AM	#1
jmillerdoc diyAudio Member Join Date: Mar 2009 Location: Lawton, OK, USA	$75 tube amp kit on eBay??? Just found this at eBay....for this price it sounds like something worth looking into. I am not associated with the seller. Just want to pass along something that might interest a few here...... 10 watt stereo SET tube amp kits $74.99 each \| eBay Cheers! Jeff

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26th August 2011, 11:53 AM	#2
Original Burnedfingers diyAudio Member Join Date: Nov 2002	Sorry but it looks like junk to me.

26th August 2011, 12:02 PM	#3
rock4016 diyAudio Member Join Date: Aug 2005	How it sounds would be of importance to me. You could always use your own chassis to make it look pretty.

26th August 2011, 01:27 PM	#4
TheGimp diyAudio Member Join Date: Aug 2009 Location: Johnson City, TN	"10 watt" amp that later in the text makes "4 or 5 watts" and probably will only make 3 when actually tested. The 6DR7 (dissimilar dual Triode, 13DR7 in his) only has a plate dissipation of 7W , so even 3W out in class A is probably optimistic if distortion is to be kept low. I have to agree it is junk.

26th August 2011, 01:49 PM	#5
milsman2 diyAudio Member Join Date: Aug 2011 Location: North Carolina	Hate to be a negative nancy, but it doesn't really say much about the distortion or any other really important stats. Hum and noise may be an issue as well...

26th August 2011, 06:17 PM	#6
tomchr diyAudio Member Join Date: Feb 2009 Location: Greater Seattle Area	It's probably 10 W at hard clipping if you add the power output from both channels.... To build a Spud-type SET amp even with the small $20 Edcor transformers, I'd budget around $100~$150 in parts alone. Then add chassis. So at $75, I'd be skeptical. Also, I'd like to see the circuit schematic and a parts list so I know what I'd be buying. Looks like someone is clearing out their junk box and will respond to any customer support questions after the sale in a manner along the lines of, "you assembled it wrong". ~Tom

26th August 2011, 06:28 PM	#7
VictoriaGuy diyAudio Member Join Date: Dec 2008 Location: Victoria, BC	A 'kit' without a parts list is pretty vague and misleading. Quote: "You don't get everything shown". And, using davidyee as a stellar example doesn't inspire much confidence in me. For $100 you can buy a Tubelab Simple PP board and the parts to stuff the board. Add transformers, tubes, hardware and you will have a real amp- though you will spend a lot more than $75 before you are finished. Some things are 'just too good to be true'.

26th August 2011, 07:08 PM	#8
DF96 diyAudio Member Join Date: May 2007	$75 seems very cheap. If it seems too good to be true . . . He says British 13DR7. I find that surprising for three reasons: 1. our TV sets did not generally use power triodes for frame output, but tetrodes or pentodes. 2. our TV sets used 300mA series heater strings, not 450mA. 3. there does not appear to be a European name (YCC8x, YCC18x etc.) for it. Still, I've been wrong before!

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