F 2 - 1 Distribution Amplifiers DA Series

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D A - 2 1 S

The DA-21S is a professional quality, broadband, VHF distribution amplifier, designed for RF distribution systems in small buildings. T h i s units employs a discrete transistor amplifier and features usually found in more higher priced amplifiers. The amplifier has a 6 dB fixed slope equalizer circuit to compensate for coaxial cable attenuation. The DA-21S has 23 dB of gain and a very flat (±0.5 dB) output. T h e DA-21S is housed in a aluminum case and operates on standard 117 VAC power.

D A - 3 3

The DA-33 is a professional quality, wideband, distribution amplifier. This units is designed for a variety of applications, including signal level meter preamplifier for making FCC required signal leakage measurements, sub-band return amplifier (when used with Blonder Tongue's DSV to bypass VHF in the forward direction), and special purpose amplifier for use aboard ships to provide coverage of the A M , shortwave, and communication bands. The DA-33 amplifies signals in the 0.5 to 300 MHz frequency range, has 36 dB of gain and has a wide range, continuous gain control. This amplifier is housed in a aluminum case and operates on standard 117 VAC power.

DA-475 U/V

The DA-475 U/V is a professional quality, broadband, UHF/VHF distribution amplifier, designed for RF distribution in commercial TV distribution systems or multi-television set homes. This unit employs a discrete transistor amplifier to drive an integrated four port output, making the DA-475 U/V ideal for feeding up to four television sets from a single antenna. Aexternally tunable FM trap is provided to minimize overload effects from strong local FM transmitters. The DA-475 U/V provides 8 to 10 dB of gain. The DA-475 U/V is housed in a aluminum case and operates on standard 117 VAC power.

ORDERING INFORMATION

DA-21S (VHF) Stock No. 4938S  

DA-33 (Wideband) Stock No. 4675

DA-475 U/V (UHF/VHF Multi-Output) Stock No. 1440

FEATURES:

DA-21S

VHF Distribution Amplifier 6 dB Cable Slope Equalized Patented ICEF** Circuit For 10 dB Greater Low Band Input Capability Without Sacrificing Noise Figure Lightning and Surge Protected

DA-33

Ultra-Wide VHF Distribution Amplifier 0.5 to 300 MHz AM, Shortwave, and TV Frequency Coverage Utilizes a Push-Pull Hybrid Module for High Output With Low Distortion Lightning and Surge Protected

DA-475 U/V

UHF/VHF Distribution Amplifiers Four Port Output For Driving Multiple TV's Patented ICEF** Circuit For Extra Wide VHF Dynamic Range Lightning and Surge Protected

S P E C I F I C AT I O N S

                                       D A - 2 1 S                       D A - 3 3                       DA-475 U/V

R F   U n i t s                    # 4 9 3 8 S                         # 4 6 7 5                         # 1 4 4 0

Frequency Range:             5 0 - 3 0 0                     0 . 5 - 3 0 0                 4 4 - 8 8 M H z

                                                                                                                  1 7 4 - 2 1 6 M H z

                                                                                                                   4 7 0 - 8 9 0 M H z

Channel Loading:                     3 5                                 2 2                                7

F l a t n e s s : ± 0 . 5 0 ± 1 . 0 0 - d B

G a i n :                                2 3                                    3 6                             8 (44-88) d B

                                                                                                                       7 (174-216)

                                                                                                                      10 (470-890)

Noise Figure (a):                      7 . 0                                5 . 5                          5.0 (44-88) d B

                                                                                                                       4.2 (174-216)

                                                                                                                       5.0 (470-890)

Output Level - Max:             + 3 7                                 + 5 0                         3 5 d B m V

Gain Control Range:              N A                                  1 8                             N A d B

Slope - Fixed:                        6                                     N A                             N A d B

Composite Triple Beat - CTB (b): - 7 4                               - 6 8                                    - d B

Cross Modulation - XMOD (b): - 5 7                                - 6 1                              - 4 6 d B

Composite Second Order - CSO (b): - 5 2                           - 7 2 - d B

Hum Modulation:                 - 5 0                            - 6 0                                     - d B

Impedance - All Ports: 7 5 ohm

Return Loss

I n p u t :                             1 3                                   1 6                               10 (44-88) d B

                                                                                                                      12 (174-216) d B

                                                                                                                       5 (470-890) d B

O u t p u t :                        8                                       1 2                               16 (44-88) d B

                                                                                                                      17 (174-216) d B

                                                                                                                     10 (470-890) d B

G E N E R A L

Power Requirements Vo l t a g e : 117, ±10%  F r e q u e n c y : 6 0 H z

Temperature Range: 0 to +50 ° C

CONNECTORS (Top Panel)

RF Input: Type "F", female

RF Output(s): "F", female

NOTES:

(a) measured at full gain with 0 dB slope

(b) at rated channel loading and out put capability * * U.S. Patent 3,413,563

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