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The
Audio Type Transformers
1608 to 1620, 1645, 1650 series. "Classic
push-pull ultra-linear audio tube transformers.
Key
Features:
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Designed
for push-pull tube output circuits.
-
Enclosed
(shielded), 4 slot, above chassis Type "X"
mounting, both end bells include knockouts for optional
above chassis wiring.
-
Frequency
response 30 Hz. to 30 Khz. at full rated power (+/- 1 db
max. - ref. 1 Khz) minimum. Except the 1650E (70 Hz. to 30
Khz. +/- 1 db max. - ref. 1 Khz.)
-
Insulated
flexible leads 8" min.
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All
units (except the EID-1650G)
include 40% screen taps for Ultra-Linear operation (if
desired).
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Typical
applications - Push-Pull: triode, Ultra-Linear pentode,
pentode and tetrode connected audio output. The 1650G does
NOT have primary screen taps and will not support
"Ultra-Linear" applications.
-
For
the "ultimate" in Push-Pull output see our line of
epoxy
potted output transformers.
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P#
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Audio
Watts (RMS)
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Primary
Impedance
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Secondary
Impedance
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Wt.
Lbs.
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EID-1608
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EID-1609
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EID-1615
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EID-1650E
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15
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8,000
ct
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100
ma.
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4-8-16
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3.5
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EID-1620
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EID-1650F
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EID-1645
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EID-1650G
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EID-1650H
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EID-1650K
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EID-1650N
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EID-1650P
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EID-1650R
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EID-1650T
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EID-1650W
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Suggested Tube Types:
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P#
|
Audio
Watts (RMS)
|
Primary
Impedance
|
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Tube
Types
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EID-1608
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Push-Pull
(2 Tubes)
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EID-1609
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Push-Pull
(2 Tubes)
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EID-1615
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Push-Pull
(2 Tubes)
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2A3,
6A3, 6AQ5, 6B4G, 6L6, 6V6
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EID-1650E
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15
|
8,000
ct
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Push-Pull
(2 Tubes)
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6AQ5,
6V6, 6BQ5, EL84
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EID-1620
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Push-Pull
(2 Tubes)
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EID-1650F
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Push-Pull
(2 Tubes)
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6L6GC,
6V6, 807, 5881, EL34
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EID-1645
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Push-Pull
(2 Tubes)
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6L6GC,
6V6, 807, 5881, EL34
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EID-1650G
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Push-Pull
(2 Tubes)
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EID-1650H
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Push-Pull
(2 Tubes)
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EID-1650K
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Push-Pull
Par. (4 Tubes)
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6L6GC,
807, 5881, EL34, 6146B, 6550B
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EID-1650N
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Push-Pull
Par. (2 or 4 Tubes)
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6L6GC,
807, 5881, EL34, 6146B, 6550B, KT88
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EID-1650P
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Push-Pull
(2 Tubes)
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6L6GC,
807, 5881, EL34, 6146B, 6550B, KT88
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EID-1650R
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Push-Pull
Par. (2 or 4 Tubes)
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807,
5881, EL34, 6146B, 6550B, KT88
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EID-1650T
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Push-Pull
Par. (4 or 6 Tubes)
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6L6GC,
5881, EL34, 6550B, KT88
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EID-1650W
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Push-Pull
Par. (6 or 8 Tubes)
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6L6GC,
5881, EL34, 6550B, KT88
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Notes:
The
above examples of possible combinations are to help you narrow
down the choices of transformers for your favorite tube types.
How you operate the tubes (push-pull, push-pull parallel,
ultra-linear, class, B+, bias, operating points, etc.) will
change optimum plate to plate load impedance. Only a few of the
most popular tubes are shown. As more tubes become available we
will add them to the list.
A tube manual or tube manufacturer's technical data sheets
should be consulted first, before making a decision on a proper
output transformer.
Mechanical
Data:
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|
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P#
|
Dimensions
(Inches)
|
|
A
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B
|
C
|
D
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E
+/- 1/16"
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G
Slot
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EID-1608
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2.5
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2.75
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3.06
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2
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1.69
|
.203
x .38
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EID-1609
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2.5
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2.75
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3.06
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2
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1.69
|
.203
x .38
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EID-1615
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2.5
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3.25
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3.06
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2
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2.19
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.203
x .38
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EID-1650E
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2.5
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3.25
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3.06
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2
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2.5
|
.203
x .38
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EID-1620
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2.5
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3.5
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3.06
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2
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2.44
|
.203
x .38
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EID-1650F
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2.5
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3.5
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3.06
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2
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2.44
|
.203
x .38
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EID-1645
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2.5
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3.75
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3.06
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2
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2.69
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.203
x .38
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EID-1650G
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3.13
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3.75
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3.81
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2.5
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2.25
|
.203
x .38
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EID-1650H
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3.13
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4
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3.81
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2.5
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2.69
|
.203
x .38
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EID-1650K
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3.13
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4
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3.81
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2.5
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2.69
|
.203
x .38
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EID-1650N
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3.13
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4.25
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3.81
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2.5
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2.94
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.203
x .38
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EID-1650P
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3.13
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4.25
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3.81
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2.5
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2.94
|
.203
x .38
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EID-1650R
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3.75
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4.25
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4.56
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3
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3.06
|
.203
x .38
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EID-1650T
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3.75
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4.5
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4.56
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3
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3.31
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.203
x .38
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EID-1650W
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4.38
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7.5
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5.25
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3.5
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5.88
|
.203
x .38
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Schematic & Hook Up Data
(except 1650E, 1645 & 1650G):
Note:
Primary & secondary
connections above, do NOT include the 1650G.
The primary of only the 1650G does not include screen taps (see
below).
The 1650G has a single secondary winding, tapped at each
impedance point.
Schematic
& Hook Up Data (1650E only):
To
hook up secondary loads simply use Com (Common wire - Blk) and
the corresponding wire for the secondary load required (ie...for
an 8 Ohm load use the Blk and Blk/Grn wire).
Schematic
& Hook Up Data (1650G only):
To
hook up secondary loads simply use Com (Common wire - Blk) and
the corresponding wire for the secondary load required (ie...for
an 8 Ohm load use the Blk and Grn wire).
Schematic
& Hook Up Data (1645 only):
-
To
hook up 4/8/16 ohm secondary loads - see "Secondary
Connections" data above.
-
To
hook up secondary to 70V loads, jumper Blk/Yel wire to Grn
wire. Connect load to Blk and White wires.
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