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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This will reduce hesthkit possibility of delay. Use a 6 solder lug at AA in place of a 6 lockwasher. Delivery time is estimated using our proprietary method which is based on the buyer’s proximity to the item location, the shipping service selected, the seller’s shipping history, and other factors.
The power losses in these cases are occurring in the cable, but the SWR hm-210 reading will not indicate that anything is wrong. Estimated on or before Wed. A cross pointer meter which reads forward power and reflected power at the same time and also indicates SWR is much easier to use. Email to friends Share on Facebook – opens in a new window or tab Share on Twitter – opens in a new window or tab Share on Pinterest – opens in a new window or tab Add to watch list.
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VHF Watt Meter HM-2102
Look up this Heathkot in the “Parts List. C1 through C14 are shown actual size. 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.
Cut off the excess lead on the component side. Parts that are damaged through carelessness or misuse ublletins the kit builder will not be replaced without cost, and will not be considered in warranty. By looking at this same level on the left-hand side of the chart, you can read the dB loss per feet of the cable at that frequency.
SWR reading while transmitter is off. The item you’ve selected was not added to your cart. Solder heatgkit four lugs to the foil. Multiply the total loss by the cable length in feet Then divide by Back to home page. No additional import charges at delivery! These resistance and reactance values change when the transmission line length or frequency is changed. Therefore, many troubles hm-210 be eliminated by reheating all to make sure that they are soldered as described in the Builders Guide.
Reverse power readings are determined, in the same manner, by the circuit consisting of diode 02, capacitor C8, and resistor R5. This is done by finding your operating frequency on the bottom line of the chart, and moving up to find the type of cable used.
Improper load on wattmeter.
Learn More – opens in a new window or tab Any international shipping is paid in part to Pitney Bowes Inc. However, the accuracy of bulltins external wattmeter will determine how accurate your Wattmeter will be. Seller information sleake Delivery times may vary, especially during peak periods.
Solder all leads to the foil and cut off the excess lead lengths. For warranty parts replacement, supply a copy of the invoice or sales slip. This item will ship to United Statesbut the seller has not specified shipping options. In this case, place the four heqthkit screws in a small envelope and tape them to the bottom of the cabinet.
Then, push the end of the black wire through hole H until the ferrite bead is down against the component side of the circuit board. Disconnect the transmission line and hm-21002 the remote chassis face down on your work surface.
Please enter a number less than or equal to 1. Merely place the FUNCTION switch in either the or watt position; then read the corresponding scale on the meter scale to obtain the power output of the transmitter. Kits that have been modified, soldered with paste flux or acid core solder, cannot be hm-1202 for repair.
Disregard the Power Meter readings at this time.
Heathkit HM SWR Meter
Transmission Line Impedance 50 ohms nominal. The item may have some signs of cosmetic wear, but is fully operational and functions as intended. Position the center pin dip toward the other mounting hole.