Specifications
(zero-beat) the FT-101 internal marker located on the Regulator Board (TC1).
QTR-24 Specifications:
Time Format: 12 and 24 hour formats
Accuracy: Continuously adjustable, 60 sec/month, nominal
Power: 1.5V, single C-cell battery, replace yearly
Internal Movement: Oscillating spring wheel
External Movement: Hours, minutes, seconds, 24 hour ring day/night indication
Construction: Black plastic frame, glass face with chrome trim
Size: 6" diameter, 2-1/2" deep
Weight: 1 lb
Mounting: Wall mount or desktop with tilt-bail
YP-150 Dummy Load / Watt Meter
The YP-150 is a 50 Ohm dummy load with a built-in RF watt meter. This unit provides a 50 Ohm resistive load to any
transmitter operating from 1.8Mhz thru 200MHz. A single PL-259 plug on the rear panel provides the unbalanced
input to this unit. The YP-150 is powered by a 117V AC source to run an internal cooling fan to remove heat from the
50 Ohm non-inductive load. Although YP-150 is powered, the front panel meter is not illuminated. A four-position
switch allows accurate RF power measurements from 0-6 watts, 0-30 watts, and 0-150 watts. The fourth position is
the OFF position which removes power to the fan and disconnects the power measuring unit. The YP-601 can be
operated without AC power, but this practice is not recommended, as excessive heat can damage the resistive load.
There is no provision for an RF "bypass", therefore this unit is best suited for bench testing and alignment procedures.
YP-150 Specifications:
Frequency Range: 1.8MHz to 200MHz
Power Scales: 0-6 watts, 0-30 watts, 0-150 watts
SWR: Less than 1.2:1 at 146MHz
Accuracy: Better than 10% of maximum scale
Meter: Logarithmic scale
Connection: Single PL-259, unbalanced
Power: 117V AC for internal cooling fan
Size: 6-1/2"h x 4"w x 11"d
Weight: 4-1/2 lbs
SP-101 External Speaker and SP-101PB External Speaker and Phone Patch
| SP-101PB Hook-up diagram
| SP-101SP Schematic |
The Yaesu SP-101 and SP-101PB provide audio fidelity that is unmatched by the internal speakers found in most
conventional HF transceivers. Although all of the FT-101 series of transceivers have internal speakers (some early
radios did NOT have speakers!), the SP-101 External Speaker provides an audio fidelity and presence which cannot
be matched with a small 3" internal speaker. The SP-101 internal speaker uses the entire speaker enclosure to produce
pleasing tonal qualities needed for the reception of rich AM, sharp SSB, and narrow CW. There are no audio filters in
the SP-101 to change the audio properties originating from the FT-101. Connection to the SP-101 is with shielded
RCA connectors. It is strongly suggested that small diameter coax or highly shielded audio be used to ensure shielding
from the transceiver to the remote speaker. The SP (speaker output) jack on the FT-101 has some RF suppression,
and is one of the first places to look for feedback and hum especially at kW levels during transmit.
The SP-101PB contains all of the excellent audio properties and characteristics as the SP-101 speaker-only model
with the addition of a hybrid telephone-patch circuit. This circuit allows the FT-101 transceiver to be interconnected
to your telephone circuit to allow telephone calls to be placed with over-the-air stations. The SP-101PB has two level
controls to ensure proper audio levels are presented to the telephone lines. A built-in VU-meter is used monitor the
phone-input levels. Connection to the telephone line is via (two-wire) twisted pair (normally red and green wires).
NOTE: When using the phone patch, you are engaging in third-party traffic in which you are the control operator.
The US does not have 100% third-party traffic agreements with all countries. Example: I was unable to make a phone
patch for a ham on a small sailboat on vacation in the Bahamas/C6 to their parents living 3 miles from my house! The
US does not have third-party traffic agreements with the Bahamas. Beware!
SP-101 and SP-101PB Specifications:
Speaker Impedance: 4 Ohms
Yaesu FT-101 HF Transceiver Home Page, NW2M http://www.qsl.net/nw2m/
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