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Old 5th May 2008, 08:27 PM   #1
davorin is offline davorin  Croatia
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Smile 1,25kW tube amplifier/modulator

Here is some photos of 1,25kW tube audio amplifier/modulator (2,5kW AM-broadcast transmitter with same tubes) in class B1.
First photo shaw audio output pear of tubes.
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Old 5th May 2008, 08:32 PM   #2
davorin is offline davorin  Croatia
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Audio and HF output tubes.
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File Type: jpg audio and hf output tubes.jpg (35.4 KB, 512 views)
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Old 5th May 2008, 08:33 PM   #3
davorin is offline davorin  Croatia
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Driver unit.
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Old 5th May 2008, 08:35 PM   #4
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Neat! What are the driver tubes?
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Old 5th May 2008, 08:35 PM   #5
nhuwar is offline nhuwar  United States
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What are those 4-400a's They look like it.
And t hey were used in tons of transmitters.


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Old 5th May 2008, 08:35 PM   #6
davorin is offline davorin  Croatia
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Audio output/modulation transformer.
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File Type: jpg audio-modulation transformer.jpg (39.7 KB, 494 views)
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Old 5th May 2008, 08:37 PM   #7
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HV power suply.
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Old 5th May 2008, 08:38 PM   #8
nhuwar is offline nhuwar  United States
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What's with the Jacob's ladders in there. Never seen that before usually have sphere's there for overload gaps.



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Old 5th May 2008, 08:38 PM   #9
davorin is offline davorin  Croatia
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Spark-gap on audio transformer.
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File Type: jpg spark gaps on audio output transformer.jpg (46.5 KB, 397 views)
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Old 5th May 2008, 08:40 PM   #10
davorin is offline davorin  Croatia
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Complete 2,5kW AM-broadcast medium vave transmitter (about 2 meter high).
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