Equipment information

P & H Electronics 2-150 Converter
Manufacturer:
Model:
2-150
Date:
Category:
Group:
Description:
Transmitting Converter

Information

P & H Electronics, Pioneer in the field of transmitting converters for the amateur VHP frequencies, has taken advantage of their experience in presenting this new Model 2-150 two meter transmitting Converter. Developed primarily for the single sideband VHP enthusiast, it is essentially a linear mixing device followed by a linear RP Amplifier. This unit permits the amateur to utilize his existing 20 meter station equipment as a signal source for the 2 meter VHP band. The features of his existing 20 meter equipment are then available on the 2 meter band. For example, if his exciter is SSB, voice controlled, and VFO with .5KC coverage, then he may operate 2 meters with SSB, voice control, VFO and ,5MC coverage with similar stability. The owner of existing 20 meter Ail equipment with VFO or crystal will be able to operate the 2 meter band, AM, VFO, or crystal controlled. This concept prevents costly duplication of equipment; for many desirable features on two meters are included in many modern new and used SSB, AM, PE, FM, RTTY, DSB, or CrJ 20 meter exciters. A signal from the high stability Oscillator circuit may be used to provide the injection for a receiving converter, thus preventing duplication of circuitry and correct correlation between Transmitter and Receiver calibration. Description The Model 2-150 consists of a high stability Oscillator and tripler circuit, employing a 6EA8, which will operate 011 any frequency from 130MC to 133.5MC. This will permit the operator to select any segment of the 2 meter band in which he wants to operate. The unit is normally supplied with a crystal on 130 or 131 MC which, with most exciters, will permit operation within the 144 MC to 144.5 or 145 MC to 145.5 MC band segments. The 130 MC signal is available at a jack on the rear of the chassis marked Osc. output. This permits the same Oscillator signal to be used for a receiving Converter. The 130 MC signal is then link coupled to the push-pull grids of the 6360 balanced mixer stage. By adjusting the injection and grid bias of this stage, compensation is made for small variations in exciter output levels. The external Pi section pad is used to attenuate the signal from the popular 100 watt class exciters while maintaining the exciter load impedance of 50 ohms. Exciters with outputs from 5 watts to 25 watts may drive the unit at an impedance of 50 ohms when connected directly to the RF III connector. The 3 DB pad can be used to correct for large differences in poirer levels or may be used in conjunction Tilth All operation as described later in the operating instructions. x'lo tuning of the 20 meter input signal is required in the transmitting Converter. This exclusive passive screen single ended injection circuit thus lends itself to more simplicity of operation, as well as superior performance with respect to mixing product attenuation. Following the 6360 mixer is a second 6360 used as a Class A buffer Amplifier. Reduced mutual coupling between the buffer input and output circuits has been accomplished by shielding and isolation, The buffer plate circuit is overcoupled to the 7^54 grid circuit permitting further simplicity of operation. The final Amplifier operates in class A3^ with reasonable efficiency - up to 60/ . The quiet operating tube cooling fan delivers up to 200 Cu. Ft./ min. of air flow in the area of the Amplifier tube envelope and the push-pull plate tank circuits. This air circulation also keeps the cabinet temperature to a low value increasing component life. The high level RF Amplifier circuit is completely shielded within the cabinet. The RF output passes through a harmonic filter to the Antenna connector on the rear of the chassis. The RF output is sampled, detected, and filtered for relative RF output readings used in tune up. Metering of the PA grid current, PA plate current and relative RF output is provided. The meter scale is calibrated accordingly. The conservatively rated built-in Power Supply provides all voltages for operation of the transmitting Converter. It features separate high voltage, low voltage, and bias rectifiers. 5ach source is separately filtered. The PA screen voltage is regulated as well as the Oscillator voltage. The mixer and PA bias voltages are variable. A terminal strip, normally shorted, on the rear of the chassis provides a PA plate current cut off bias when these terminals are open. These should be connected to a normally open relay contact on the exciter voice control relay if an electronic TR switch Is used to switch the Antenna from the Receiver to the Transmitter. This is necessary as the noise generated by the electron flow through the 7854 under the static current conditions of 50 Ui can be heard in the Receiver.

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Servizio e manuale utente
Manual type:
Servizio e manuale utente
Pages:
16
Size:
6.51 Mbytes (6831072 Bytes)
Language:
english
Revision:
Manual-ID:
Date:
Quality:
Documento scansionato, la lettura in parte male, non in parte leggibile.
Upload date:
01 January 2017
MD5:
d71f8c233c976021de915b7d3dc68da7
Downloads:
478

Information

Application ... Page 1 Description ... ... Page 1 Specifications ... ... Page 3 Installation and Operating Instructions . . . Page 4 Alignment ... Page 6 Crystal Frequency & Coverage Chart ... Page 7 Interconnection Diagrams ... . Page 8 Tube Layout Diagram . ... Page 9 Parts List ... Page 10 Circuit Diagram ... . . Page 11

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