[Milsurplus] TCK-4

[Bruce Gentry]

On 2/9/17 2:14 PM, w8au at sssnet.com wrote:
> At 10:20 AM 2/9/2017, Rob Flory wrote:
>
> On the other hand, the High voltage supplies of the buffer and amp 
> stages are regulated only by PS swinging chokes.  This allows for some 
> dynamic
> voltage swings during keying that give the TCK it's "commanding" 
> sound, a slight form of very momentary AM modulation on the leading 
> edge.  This gives
> them a "signature" that can't be provided by our solid state 13.8 V 
> regulated transceivers.

       An organist refers to that kind of accent as chiff, it compels 
the ear of the listener and improves clarity and articulation in a large 
room. I can see how it could make copying the signal easier in a noisy 
environment or at long distance when fading is serious.
>
>> Most shipboard transmitter motor-generator sets have a series coil in 
>> addition to the shunt coil,which boosts the voltage under load to 
>> counteract the IR drop.  On the TBK transmitters at USS 
>> Massachusetts the voltage does not budge one iota from key up to key 
>> down.  You can't do that with a rectifier supply without a regulator.

       This is all very familiar to me. The series field makes it a 
compound generator, and if everything is right, the regulation is very 
good. Do the transmitters have any sort of shunt resistor across the 
series field, or taps in the series winding to adjust the amount of 
series field effect?


         Bruce Gentry KA2IVY
>
>
>
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