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PH-1A
he Crown®
power supply for condenser microphones. Battery power provides 17V phantom and AC power provides 24V phantom.
SINGLE CHANNEL BATTERY OR AC POWERED PHANTOM POWER SUPPLY
Features
The unit can be AC powered by using the Crown
When using external power, the
Supplies a single channel of phantom power to a condenser microphone
Powered by internal 9V batteries or external 24V power supply
Supplies 17V with battery power and 24V with AC power
Rugged construction for professional use
If AC power fails, the batteries automati- cally take over
Quiet, transformer isolated
With battery operation, the
The
The rugged steel and aluminum chassis is de- signed to withstand daily abuse in professional applications.
Operation
To use your phantom supply, follow this pro- cedure:
1. For AC power, plug the Crown |
adaptor into an AC outlet providing 120 VAC, 60 |
Hz. Plug the 1/8 inch (3.5 mm) phone plug from |
the AC/DC adaptor into the 1/8 inch (3.5 mm) |
phone jack in the phantom supply. |
2. For battery power, unscrew the two large |
captive screws on the underside of the phantom |
supply; open the chassis, and install two 9V |
alkaline batteries (Duracell MN1604 or equiva- |
lent). Replace the cover. |
3. Plug the cable from your microphone into the |
MIC IN connector. |
4. Plug the cable going to the input of your |
mixer or recorder into the OUTPUT connector. |
Specifications
Phantom voltage supplied: 24V with AC powering; 17V with battery power. Each volt- age is nominal loaded voltage on pins 2 and 3 with respect to pin 1 of microphone input connector.
Number of channels: 1.
Microphone input connector: Female
Output connector: Male
DC power input connector: 1/8 inch (3.5 mm) phone jack, positive tip.
AC/DC adaptor: Use Crown
Battery powering: Two 9V alkaline cells (Duracell MN1604 or equivalent). Batteries not included.
Battery life: 525/I hours, where I = current drain of microphone in mA. 350 hours typi- cal.
Hum filtering (inside phantom supply): 50 dB at 60 Hz; 62 dB at 120 Hz.
Dimensions: 5.0 x 2.325 x 1.750 inch LWH (12.7 cm x 5.91 cm x 4.44 cm).
Weight: 1¼ lb. (0.57 kg).
Optional accessory: 24V AC/DC adaptor, Crown model PS-24.
This cable can be unbalanced because the phan- |
tom supply is transformer isolated. |
5. To prevent ground loops, be sure that the |
phantom supply is resting on its rubber feet. |
6. To avoid draining the batteries after use, |
unplug the mic cables and unplug the AC/DC |
adaptor from the phantom supply. There is no |
battery drain when all cables are unplugged |
from the supply. |
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