Fig 1: Heathkit HM HF RF Power Meter. The HM Meter for VHF is SImilar. Part #. Began Ended Frequency MHz. Power Watts. Notes. HM The Relay Modification Kit [PN ] is available from Heath Parts . March 2, HM Bulletin No: VHF Watt Meter HM MODEL HM VHF Wattmeter ASSEMBLY MANUAL Copyn^it Heath Company All rtghtt restrved HEATH COMPANY PHONE.

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Heathkit HM SWR Meter

With a pair of long-nose pliers pull the wires out of the outer insulation. Please enter a valid ZIP Code. If you have an accurate VHF Wattmeter, you can calibrate to it with similar results. Where a wire passes through a connection and then goes to another point, as in the next step, it will count as two wires in the solder instructions S-2one entering and one leaving the connection.

Use additional packing material where there are protrusions control sticks, large knobs, etc. The values of cable losses at various bulletinss can be obtained from Figure 4.

Nearby transmitter in operation. Do not overtighten the meter nuts, as the meter case can be broken. Locate the same identification number next to the part on the Schematic. However, the accuracy of the external wattmeter will determine how accurate your Wattmeter will be. F and type mica or disc. Refer to Detail 2A and install the. Reverse power readings are determined, in the same manner, by the circuit consisting of diode 02, capacitor C8, and resistor R5.


These resistance and reactance values change when the transmission line length or frequency is changed. We warrant that, during the first ninety 90 days of ownership, our products, when correctly assembled, calibrated, adjusted, and used in accordance with our printed instructions, will meet published specifications.

Disconnect the transmission line and place the remote chassis face down on your work surface.

Thanks for everyones help. The item may have some signs of bul,etins wear, but is fully operational and functions as intended. Michigan, or to any Heathkit Electronic Center units of Schlumberger Products Corporationor through any of our authorized overseas dis- tributors.

Capacitor C1C2, or C9. If you wish to place the remote chassis in some location away from the cabinet, so the remote unit will heqthkit near the transmission lines, do not complete the following steps.

Solder the three lugs to the foil.

This Wattmeter may be permanently installed in your transmission line and needs no other power source. Check for bits of solder, wire ends, or other foreign matter which may be lodged in the wiring. This item will be shipped through the Global Shipping Program and includes international tracking. hmm-2102


Heathkit HM SWR VHF Power Meter | eBay

This amount is subject to change until you make payment. Any international shipping and import charges are paid in part to Pitney Bowes Inc. A cross pointer meter which reads forward power and reflected power at hwathkit same time and also indicates SWR is much easier to use. Capacitors C1 and C2, diode D1and voltage divider resistor R1 through the calibrate jumper complete a voltmeter circuit for the wattmeter calibration.

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VHF Watt Meter HM-2102

Either procedure will give accurate results over the full range specified for your Wattmeter. Subject to credit approval. The shorting wire will be removed later. If the transmitter output tuning adjustments will not accommodate this impedance range, the transmitter will be difficult to load until the load is properly matched to the line.

The effectiveness of our consultation service depends on the information you furnish. Seal the carton with reinforced gummed tape, tie it with a strong cord, and mark it “Fragile” on at least two sides.

Read the “Kit Heatgkit Guide” for complete information on unpacking, parts identification, tools, wiring, soldering and step-by-step assembly procedures.

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