Sowter Type 1290

AC coupled cathode follower Output Transformer
for OPTO4/5 (LA-2A) Compressor.

PACKAGE OPTIONS Part Number
Mumetal can with threaded grommet 1290-E

1290 response

Sowter package style
APPLICATION For use in a high performance valve compressor/amplifier etc for driving a balanced line from an ac coupled cathode follower or SRPP circuit.  Similar to UTC A24 and Triad HS-50 (in overall 5:1 configuration) but with improved bandwidth. Introduced to provide a mumetal can option at reduced cost transformer option relative to our type 1010. Suitable for the Drip OPTO 4 and OPTO 5 (LA-2A) PCB.
FEATURES Combination core using Mumetal 30% and high grade M6 Grain Oriented Silicon Iron (70%) for high level capability whilst ensuring minimal distortion particularly at mid and high frequencies. Exceptional bandwidth. Colour coded leads. Mounting with Threaded Grommet.
RATIO 5 : 1
TOTAL HARMONIC DISTORTION at 1000Hz 0.01% maximum
MAXIMUM OUTPUT LEVEL 0.5 % THD at 20 Hz +24 dBu
MAXIMUM OUTPUT LEVEL 0.5 % THD at 50 Hz +30 dBu
FREQUENCY RESPONSE 2kOhm source 600 ohm load +/- 0.5 dB 10 Hz to 100 kHz typical
MAXIMUM PRIMARY DC per side 0 mA
TOTAL DC RESISTANCE referred to secondary 31 ohms
DIMENSIONS 45 dia x 52.5 high. 15 mm below board.
Sowter Size M style e  
E A Sowter Ltd.
The Boatyard, Cullingham Road
IPSWICH IP1 2EG England
SOWTER Logo Tel: +44(0)1473 252794
Fax: +44(0)1473 236188
E-Mail sales@sowter.co.uk