TX 70A

TX-10B TX-10B

TX-LM2 TX-LM2

TX-1A TX-1A

User Manual: TX-70A

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TX™ SERIES
TX-10B Bridging Input Transformer
•
•
•
•
•

Used to add transformer
isolation to any line-level RDL
product input
Frequency response: 20 Hz to
20 kHz (+/- 0.5 dB)
THD: , 0.05% (1 kHz)
10 kΩ input bridges any audio
line
Balanced input and output

TX-1A Adjustable Line Transformer
•
•
•
•
•

Provides transformer isolation
between balanced and
unbalanced line inputs
Level trimpot adjusts output 4 to
24 dB below
Input level may be 10 kΩ
bridging or 600 Ω terminated
Frequency response: 20 Hz to
20 kHz (+/- 0.5 dB)
THD+N: < 0.05 % (1 kHz)

TX-LM2 Line Matching Transformer
•
•
•
•

Matches balanced 600 Ω
phone or other line into mic or
line input
Dual outputs: Unbalanced line
level or balanced mic level
Frequency response: 20 Hz to
20 kHz (+/- 0.5 dB)
THD: < 0.05% (1 kHz)

TX-70A 100/70/25 Volt Input Interface
•
•
•
•

Matches a 100, 70 or 25 volt
speaker line to any unbalanced
line-level audio input
Trimpot adjusts output level for
various input voltage/power
levels
Frequency Response: 20 Hz to
20 kHz (+/- 0.5 dB)
THD: < 0.05% (1 kHz)

SPECIFICATIONS:
Width:
Length:
Height:

1.20 in.
3.00 in.
1.40 in.

3.00 cm
7.60 cm
3.60 cm

RDL • 659 N. 6th St. • Prescott, AZ., USA 86301 • (928) 443-9391 • FAX (928) 443-9392 • www.rdlnet.com

TX™ SERIES

Installation/Operation
EN55103-1 E1-E5; EN55103-2 E1-E4
Typical Performance reflects product at publication time
exclusive of EMC data, if any, supplied with product.
Specifications are subject to change without notice.

TX-10B

TX-1A

BRIDGING INPUT TRANSFORMER

ADJUSTABLE LINE TRANSFORMER

600
OHM

-

+

+

-

600
OHM

INPUT FROM
BALANCED LINE
(600 OHM LINE)

INPUT FROM
BALANCED LINE
(BRIDGING)

INPUT FROM
BALANCED LINE

CONNECT IF REQUIRED

CONNECT IF REQUIRED

OUTPUT TO
ELECTRONIC-BALANCED
EQUIPMENT INPUT

OUTPUT TO
UNBALANCED
EQUIPMENT INPUT

OUTPUT TO
UNBALANCED
EQUIPMENT INPUT

CONNECT IF REQUIRED

+

+

ADJUST LEVEL

TX-70A

TX-LM2

25/70/100 VOLT INTERFACE

LINE MATCHING TRANSFORMER
CONNECT IF NEEDED TO REDUCE HUM
FROM LONG LINE

-

CT

INPUT FROM
BALANCED LINE
(600 OHM LINE)

INPUT FROM
BALANCED LINE
(600 OHM LINE)

OUTPUT TO
LINE-LEVEL UNBALANCED
EQUIPMENT INPUT

ADJUST LEVEL

CONNECT IF REQUIRED

+

-

+

-

OUTPUT TO
MIC-LEVEL BALANCED
EQUIPMENT INPUT

+

+

OUTPUT TO
UNBALANCED
EQUIPMENT INPUT

+

CT

CONSTANT VOLTAGE LINE

SET TO 25V, 70V, OR
FULLY COUNTER-CLOCKWISE
FOR 100 V SYSTEM
TRIM LEVEL AS NEEDED

CONNECT IF NEEDED TO REDUCE HUM
FROM LONG LINE

+

-

CONNECT IF REQUIRED

CONNECT IF REQUIRED

+

CONNECT EITHER MIC OR LINE OUTPUT, NOT BOTH
NOTE THAT INPUT CENTERTAP IS NOT INTERNALLY CONNECTED TO GROUND

891-0068H

Radio Design Labs Technical Support Centers
U.S.A. (800) 933-1780, (928) 778-3554; Fax: (928) 778-3506
Europe [NH Amsterdam] (++31) 20-6238 983; Fax: (++31) 20-6225-287
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