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High
Frequency Transmitter Testing Phase
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The HF transmitter had acquired quite a bit of grime but no corrosion was present. |
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Lucky penny found "heads up" in the bottom of the set. |
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Test jig for filament current on the 803. |
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4 and 1/2 amps at 10 volts. |
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PA tuning section. Note that the coil when rotated also drive the variable. |
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Complete schematic GO-9 |
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Side view. Meter shown is an RF Amp Meter. |
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Left side of the transmitter, note the power supply connections on the bottom and the antenna connection at the top. |
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Power resistors mounted in clips. |
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Initial testing. |
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Temporary power connections. Better than those clip on leads. Terminals are designed to make contact with spring type connections show below. |
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Spring connections on the power supply chassis. This board mates with the transmitter power strip. |
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T power connections were made using copper strips bend around the connector. The strips were held with with 6-32 screws and standard crimp terminals. |
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An excellent load for testing. |
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A ground binding post was fabricated by using a 1 inch 8-32 bolt and a knurled nut. This assembly replaced the flat head bolt on one of the latches. |
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Temporary antenna connector for coax. |
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A
better antenna connector as suggest by Mike KC4TOS , using Rajah type
High Voltage connectors to connect RG-58 coax. Do a "Google"
for connector sources. Or check EPay. Cable at the bottom is for the receiver.
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The Rajah connectors look just like the connectors shown on the page from the manual. |
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Target control settings are printed on the inside of the VFO cover to aid in initial tuning. |
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My setup during a "CX" contest. |
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The CX contest operation was an excellent test for my prototype power supply boards. |
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Overall a neat looking transmitter. A little on the heavy side. Lots of knobs and meters. Takes about 3 hours to tune up. |
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Return to GO-9 Index | |||||
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