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Old 26th August 2011, 08:29 AM   #1
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Default $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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Old 26th August 2011, 11:53 AM   #2
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Sorry but it looks like junk to me.
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Old 26th August 2011, 12:02 PM   #3
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How it sounds would be of importance to me. You could always use your own chassis to make it look pretty.
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Old 26th August 2011, 01:27 PM   #4
TheGimp is offline TheGimp  United States
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"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.
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Old 26th August 2011, 01:49 PM   #5
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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...
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Old 26th August 2011, 06:17 PM   #6
tomchr is offline tomchr  United States
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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
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Old 26th August 2011, 06:28 PM   #7
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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'.
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Old 26th August 2011, 07:08 PM   #8
DF96 is offline DF96  England
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$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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