VI.
1
Tube complement
Electric Signal MMXV AD
Page 31
Delta Transconductace band Compressor
User Manual
Page 32
Tubes for replacement can be obtained from our
factory.
The Delta Transconductance band compressor
uses the following thermionic tubes:
12X
6ba6/5749/6k4p
Compression
3X
6H30 Input/output
2X
6H2p(-ev/-er)
Mixing
4X
12AT7/ECC83
PI/tonecontrol
Notify that the remote cutoff tubes, responsible
for the compression(6ba6/5749/6k4p) need to
be matched pairs. The 5749W (wich comes with
the compressor) is an joint Army Navy electron
tube from General Elecric.
The two 6h30 for the output need to be
matched triodes.
The Delta Transconductance band compressor
comes with two russian milspec 6h2p-er,
responsible for mixing, if desired to use an
european ecc81or an nowadays 12ax7 make
use of a ecc to 6h2p socket (contact electric
signal for more information)
Not every ECC83 is usable due to the maximum
rating specifications, contact electric signal for
more information.
See next subject for tube replacement.
VI
.
2
Replacing the tubes
6ba6/5749/6k4p
ecc81/12at7
6h2p
6h30
To remove a tube, press the screening can down
and twist anti-clockwise, when it will spring out.
Then remove the tube by pulling upwards,
possibly using a cloth if it’s still hot. Take care
not to bend the pins when putting back in.
