N Cook wrote in message
...
Ron(UK) wrote in message
...
N Cook wrote:

In a similar vein. If an amp needs a rare or expensive or unattainable
output hybrid block STK..., TA..., Si... I tend these days using a
relatively cheap for its performance, 100W TDA7294 instead. Small
enough
to
place upside down or 2 together for 2 channels, with extra clamping
and
with
a strip of matrix board on the new block pins then insulated wires
crossing
over one another to the original pad positions.
It is usually possible to work out the DC rails, i/ps,o/p, comp, mute
lines
even if a pinout for the original is not available.

I do miss those Maplin 150 watt mosfet modules, great for resurrecting
old stuff like H-H PA amps and the like. There`s nothing quite like them
now, I must have built over a hundred, and most of them I bet are still
working.

Ron(UK)

--
Lune Valley Audio
Public Address Systems
Hire Sales Maintenance
www.lunevalleyaudio.com

Assuming you put in spring clamps, or such, then cutting off the
protruding
tab of the TDA7294 leaves a block only 20x10x4 mm , so 2 easily go in the
space of an STK... etc and those are usually quite a bit less than 2x
100W.
I wonder if they're bridgable, I'll have to dig out the pdf.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/



The pdf shows 2 bridged example but 8 ohm minimum but I've seen 4 of these
bridged in a high power mixer-amp so presumably 4 ohm in that case.
I meant SVi not Si, the Technics things

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/