Equipment information:

Gates Radio Company M-5790 BC-1T Transmitter
Manufacturer:
Gates Radio Company
Model: M-5790 BC-1T
Date: 1961
Category: Radio, Communication
Group: Transmitter
Description: 1000/250W Broadcast Transmitter
Information:
                                    THE FOLLOWING SPECIFICATIONS ARE TYPICAL AND MAY VARY

SLIGHTLY WITH VARIOUS MODES OF OPERATION:

1.	Rated power output: 1000/250 watts. Capable of 1100/275
watts where directional systems induce losses.

2.	Frequency range: 1600 Kc to 5^0 Kc at the frequency you
ordered.

3.	Power input: 230 volts, 3 wire, solid neutral, single
phase, either 50 or 60 cycles. Provide #4 or larger primary
wiring from entrance box to transmitter. Transmitter will
consume approximately 4000 watts at 100% modulation.

4.	Frequency stability: + 10 cycles.

5* Audio input: + 12 db + 2 db for 100% modulation for both
output powers. The output of a Gates SA-39B limiter should
be correct for this. If other limiter or audio amplifier is
used, be sure and check output capabilities.

6. Input audio impedance: As supplied, 600 ohms, which will

also match 500 ohm impedance. It may be connected for
150/250 ohms if desired.

7- Distortion: Rated at 3% from 50 to 10,000 cycles but
capable of much better at many frequencies.

8. Noise: 60 db or better below 100% modulation.

9» Carrier shift: 3% or less between 0 and full
modulation-provided wire size in Point 3 (above) is followed
and R.F. load is correctly tuned.

10« R.F. output impedance: Will match loads from 50 to 70 ohms.

An antenna coupling unit is usually necessary to match the
antenna tower.

OTHER HELPFUL DATA:

(a)	Provision for 2 vacuum type crystals and holders. If you
wish a spare, order M5602, giving your frequency.

(b)	The inbuilt dummy antenna will accept 100% modulation
and is for 51*5 ohms. See Par. 4 under "How Can We Help
You?" in the-back of this manual, entitled "Computing Power
Output".

The dummy antenna is substituted for the tower.

(c)	THE TWO TOP SUCTION FANS can do their best in cooling
performance by periodical replacement of the removable air
filters located at the front bottom of the transmitter.

Order Type M5825 and two are required. The time cycle in
replacing filters depends on dust conditions. Normally about
three times annually.

These manuals are available for the above equipment:

Gates Radio Company -- M-5790 BC-1T -- Service and User Manual
File name: Gates-6692-Manual-Page-1-Picture
Manual Type: Service and User Manual
Pages: 73
Size: 5.15 Mbytes (5396455 Bytes)
Language: english
Revision:
Manual-ID/Number:
Date: 17 February 1961
Quality: Scanned document, reading partly badly, partly not readable.
Upload date:
MD5: ae5b5bcbdd8ee8b6e120da54ee08b9b6
ed2kID: afc1fe8aae7a8c74005eff1dc87fd17c
Downloads: 50 since 14 May 2015
Information:
AIR FILTERS .................................................18

ANTENNA COUPLING .......................................16

AUDIO INPUT ............... ................ .................7

CRYSTALS AND ADJUSTMENT
........................................................5, 17

DUMMY
ANTENNA............................................................................9

FEEDBACK.......................................... .	8

FILAMENT RHEOSTAT...................
.............................16

FLOOR WEIGHTS
......................................................3

FREQUENCY MONITOR
....................................................................6

GROUND SYSTEM
.....................................................................4

INSTALLATION HINTS
...............................................3

INTERMEDIATE POWER AMPLIFIER
..............................................9

METERS
.............................................................18

MODULATION MONITOR
..................................................................7,

MODULATOR BIAS, ADJUSTING
....................................................7, 16

NEUTRALIZING
.............................................................................6,
12, 13

PARTS LIST
..................................................................................1
thru 6

PLATE RHEOSTAT ....................................*	16

POWER AMPLIFIER MD TUNING
...................................6, 14

POWER SUPPLIES:

HIGH VOLTAGE...................................9

INTERMEDIATE...............................................9

MODULATOR BIAS
..............................................................8

PRIMARY
LINE......................................................................4

PROTECTION:

MODULATOR.................... . ....................8

POWER AMPLIFIER.........................................7

RELAYS
..............................................................................8,
18

READYING CHECK LIST
..............................................................9

REMOTE CONTROL
........................................................................9,
20,21

SPECIFICATIONS, TYPICAL
......................................................2

SUCTION FANS ..........................................2, 18

TEST EQUIPMENT
........................................................................18

TRANSMITTER BASE.........................................3

TUBES
................................................................................3

TUNE-UP PROCEDURE
..................................................................11,12,14,

15

VOLTAGES, AND CURRENTS
..........................................................14,16,22
Gates-6692-Manual-Page-1-Picture
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