"Iain Churches" wrote in message
...

"David Looser" wrote in message


My most recent audio project has been a device to pick-off 5.1 or 7.1
LPCM
audio from the HDMI output of a Bluray player and send it as 4 AES/EBU
streams to a cinema audio processor. Try doing *that* with valves!

That's a good project. Do you have a picture?

I'm afraid not, and it's no longer here to photograph. But it's not much to
look at, just a plain aluminium box with a couple of PCBs inside. One PCB,
which was "borrowed" from a commercial HDMI repeater includes an SII9135
HDMI decoder chip, whilst the other PCB has the 4 AES/EBU transmitter chips
(Crystal CS8404) and a couple of standard CMOS logic chips on it. The
hardest bit was picking off the four I2S signals and their three related
clocks from the miniscule tracks on the repeater board. It took a
fine-pointed soldering iron, a magnifying glass and a steady hand ;-).

I have a project on the back burner to build a
pair of log meter amplifiers with valves to drive a
pair of Decca type Ernest Turner PPMs

http://www.kolumbus.fi/iain.churches...tTurnerPPM.jpg

Can't see the point myself since you can get PPM driver cards so easily, but
each to their own :-)


If the principal concern is price, you shouldn't even
think about building valve equipment. But if you
are looking to do something that will give you
weeks of building enjoyment and years of listening
pleasure then there is nothing better


I long ago ceased to find pleasure in building stuff simply for the sake of
building something. I've hade a lifetime of electronic construction, either
for myself, my employer or other people. It's the problem solving that I
enjoy, finding a solution to a particular requirement that cannot be met
satisfactorily or economically using off-the-shelf equipment. That's the
sort of thing I like doing, not building yet another HiFi amp. But as we've
both said before, each to their own.

David.