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Old 24th November 2012, 06:09 PM   #4491
tim614 is offline tim614  United States
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Thanks mhouston
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Old 25th November 2012, 12:31 AM   #4492
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Great job love the spun cap bodies.
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Old 25th November 2012, 12:47 AM   #4493
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Originally Posted by Triodethom View Post
Great job love the spun cap bodies.
Thank you!
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Old 25th November 2012, 01:07 AM   #4494
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I was given a box of very old tubes. In the mix was a new pair of black metal tube RCA 6N7s (tested 80%). There seems very little schematics for this tube as a preamp but lucky my electronics engineer mate knocked up a design.

The preamp runs from a 18V 2.2A wall wart and uses a step down tranni backwards to produce 255VDC HT. The sound is punchy, deep driving bass, clear, clean and crisp. Best preamp I have ever made. Dead quiet at idle. I have called the preamp "Heavy Metal" after the metal tubes.
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Old 25th November 2012, 08:53 PM   #4495
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Beautiful
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Old 25th November 2012, 09:18 PM   #4496
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My Heavy Metal preamp with the RCA 6N7 tubes has made my whole CD, hard drive based high-rez music and LP selection sound like new. This morning I connected up my Cowon S9 to use it's FM tuner for ABC Classic fm to find it also sounds sooo much better.

Not sure what makes this preamp so good. It must be the tubes.
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Old 27th November 2012, 06:49 PM   #4497
6L6 is offline 6L6  United States
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Pete Millett DCPP or "Engineer's Amplifier"
6CB6/6NJ6 Push-Pull Pentode with distortion cancellation.

More info can be found here - DCPP Amp

Click the image to open in full size.
99% done, just need to finish a bit on the chassis wood.
It sounds fantastic!
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Old 27th November 2012, 08:25 PM   #4498
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Got to say I love the vents on the top there that great.
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Old 28th November 2012, 03:50 AM   #4499
freax is offline freax  Australia
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Originally Posted by triodes4ever View Post
Pic of one of my VT4-C monoblocks (driven by Valvo Ca, which is driven by a 26) Rectifiers are 1616 half-wave. OPT is Tango X10S. Interstage NC-14.
Choke input supply, amorphous chokes in HT.
etc etc.
oh man, this takes me back, tango transformers and that tube...

dreamy!!!
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Old 28th November 2012, 04:01 AM   #4500
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Originally Posted by Cassiel View Post
No spinning but it weeds out bad vibes from your system. Here's another voodoo idea to improve your sound and take some heat off:
Is that part of a gun assembly from an in-line color CRT?
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