SOWTER TYPE U066
MULTI-PURPOSE PUSH-PULL EXPERIMENTERS TRANSFORMER
|
PACKAGE SIZE
L |
STYLE OPTIONS
S, T, O |
| APPLICATION: For experimenters who wish to try valves such
as 5881, EL34, 6550, 6L6, KT66 in various push-pull configurations such as
triode, tetrode or pentode mode with a pair of valves or two pairs in
parallel with or without cathode feedback. The primary may be connected to
give an RLa-a of approximately 10K or 5k0 ohms and the secondary may be
configured to give 16/8/4 ohms. If an 8 ohm speaker is used with the
secondary configured to 16 ohms the primary reflected load will be 5k0 or
2k5 ohms. May be used for a range of high quality designs without any
performance compromise or for experiments to study the effects of
different circuit configurations. Please note the reflected impedances do
not take account of the dc resistance of the windings. |
FEATURES: High grade low loss grain oriented silicon iron
core for minimal distortion. 14 winding sections which can be configured
so that all the sections are always in use to ensure minimal leakage
inductance so the transformer has exceptional bandwidth and transient
response.
There are 4 separate identical secondary windings which can be configured
for 4/8/16 ohms speakers. Please note the actual secondary impreances are
4/9/16 ohms).
Cathode winding for "super ultra linear"
connection as described by Williamson and Walker AES Journal April 1954
Volume 2 Number 2. Screen taps or even a separate screen feedback winding
allowing the screen to be returned to a different voltage may be
configured for experiments. |
| BANDWIDTH: Depends on configuration but typically - 3dB at
10Hz and 40KHz. Best response is obtained with triode connection and/or
with cathode feedback. |
| POWER at 25 Hz |
20 Watts minimum |
| ANODE CURRENT max per side |
150 mA |
 |
|
RLa-a = 10K |
RLa-a = 5K |
| ANODES |
1,13 |
3,11 |
| CATHODES (optional) |
6,8 |
6,8 |
| HT+ |
5 |
5 |
| JOIN |
5+9, 2+3, 11+12 |
5+9, 1+3, 2+4, 11+13, 10+12 |
| 33% SCREEN TAPS |
4,10 |
|
| 66% SCREEN TAPS |
2,.12 |
|
| 50% SCREEN TAPS |
|
4,10 |
| Primary inductance (typical) |
70H |
30H |
| Ratio Tertiary/Primary |
6% |
12% |
| Primary resistance (typical) |
160 ohms |
120 Ohms |
| E A Sowter Ltd The
Boatyard, Cullingham Road IPSWICH IP1 2EG England |
Tel: +44(0)1473 252794
Fax: +44(0)1473 236188 |