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DISCLAIMER: Vacuum tube circuits work with dangerously high voltages. Do not attempt to build circuits presented on this site if you do not have the required experience and skills to work with such voltages. I assume no responsibility whatsoever for any damage caused by the usage of my circuits.

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Thursday, January 6, 2011

Gallery: Amps shown at ETF09

Hi!

Probably not every visitor of my blog is interested in technical details and schematics. Don't worry if you found my last post too dry and boring. I will also write about some other stuff, like favorite music and occasionally also about topics I find interesting but which are not related to audio. And of course I will also entertain you with some tube amplifier porn. So here is the first installment of the gallery section in which I will show photos of some amps and preamps I built.

First I'd like to thank Holger Barske who was so kind to send me photos which he took of equipment which I brought to the European Triode Festival in 2009. First photo is a close up of a single ended 801A amplifier:


This is a Stereo Amp with external PSU. 6N7 Driver stage, transformer coupled to 801A. All Tango transformers.

 This is another version of SE 801A amp. Same configuration as the other, but with a mix of Lundahl interstage and Tango output transformers.

This one is also powered from an external PSU.

One of the PSUs is shown in the next picture. It can be configured for various voltages so it is usable with different amplifiers.

The PSU has different rectifier sockets which are wired in parallel. It can use either of these: 5R4, 5U4, 5X4, 83, 5Z3 or a pair of TV dampers like 6AX4, 6AU4. There is a separate rectifier for the driver, a 6BY5. The filter can be configured for either choke or capacitor input.






Next is a picture of different amps. The 801A again in the front row left and a single ended 6CB5A amp besides it. In the second row is a mono 211 SE amp with it's PSU. In the back on the right side you see a power supply of a preamplifier. And finally a SE 300B in the left corner in the back:


And here the preamps, A 801A linestage and EC8020 LCR EQ phono stage:



Close up of the EC8020 phono:

Another univeral power supply with 866A mercury vapour rectifiers:




And here a picture of the complete system which was presented at the ETF09, besides the right speaker in the fron there is a SE 45 amp with it's power supply besides it:



Best regards

Thomas

1 comment:

  1. Hi Thomas, fantastic amps and a highly recommended blog! I will visit you regularly! Kind regards, Carsten

    ReplyDelete