Fig 1: Heathkit HM HF RF Power Meter. The HM Meter for VHF is SImilar. Part #. Began Ended Frequency MHz. Power Watts. Notes. HM line of Heathkit SWR bridges and, later, power meters. The Heathkit HM SWR Bridge Meter: HM for VHF. . issue of RF, the newsletter of the. The Relay Modification Kit [PN ] is available from Heath Parts . March 2, HM Bulletin No: VHF Watt Meter HM

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With a pair of long-nose pliers pull the wires out of the outer insulation.

Capacitors C1 and Bulletih, diode D1and voltage divider resistor R1 through the calibrate jumper complete a voltmeter circuit for the wattmeter calibration.

Get the item you ordered or get your money back. Other offers may also be available. Do not include any wooden cabinets or color television picture tubes, as these are easily damaged in shipment.

These losses become worse as time and moisture affect the cable. Estimated on or before Wed.

Refer to Pictorial 9 for the following steps. Learn More – opens in a new window or tab Any international shipping is paid in part to Pitney Bowes Inc.


Heathkit Service Bulletins – HG/HL/HM/HN/HO (Complete)

Now determine the additional loss caused by the SWR from Figure 5 as follows: Turn on the transmitter and set it to the CW mode in the 6 or 2-meter band. This information is also valuable for antenna adjustments or to determine the frequency range of the antenna. When these losses occur, the RF power is bullettin into heat in the cable instead of being radiated from the antenna.

Insert the other end hearhkit hole K on the circuit board and solder it to the foil. Push the switch in and note the meter reading. It will not work on transmission lines that are used as tuned feeders, since tuned feeders normally have a high SWR.

Transmission Line Impedance 50 ohms nominal. Detail 7B Refer to Detail 7B and place a ferrite bead over the bare end of the black wire.

Learn More – opens in a new window or tab. Interest will be charged to your account from ym-2102 purchase date if the balance is not paid in full within 6 months.

VHF Watt Meter HM-2102

And we’ll pay shipping charges to get those parts to you — anywhere in the world. See all condition definitions – opens in a new window or tab Locate the circuit board and position it lettered side up as shown in Pictorial 1. Install the green wire and bead combination at F S New to Ham Radio?


Tune the transmitter on the 2- or 6- meter band. This reading should be at or near zero. Make sure the meter top bullein parallel with the top of the panel. Connect the black wire to the negative unmarked meter lug S Save one of the excess lead lengths for use in later steps.

Heathkit Service Bulletins – HG/HL/HM/HN/HO (Complete)

Read more about the condition. Some of the circuit board holes and one capacitor will not be used.

Improper load on wattmeter. Zero the meter with the knob, then push the knob back in – without changing its rotation at all. Refer to Pictorial 7 for the following steps. Watch list is full. Ship heath,it prepaid express. Turn the SWR Sens control shaft fully counterclockwise.

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