[ARC5] TCS 50-Ohm Matching Configurations.

[Brian Clarke]

Hello Bob,

What you describe is Power Transmission and Distribution, not Maximum Power as per the Jacobi theorem. Agreed.
So, you want the output impedance of the TCS to look like, say, 0.5 Ohm. Putting a capacitor in series is only part of the story.

73 de Brian, VK2GCE.

On Friday, 11 May 2018 11:22 PM, Bob said:

Hi

Like most tube radios, the TCS matches the output tube to an antenna load. It only has
an “output impedance” in a vague sort of way. You don’t want to “match” the load and 
burn up half the power in the transmitter’s 50 ohm source. You want to deliver as much
power to the load ( and burn up as little in the transmitter) as possible. 

The only real way to work out what the matching circuit will do is to take a look at what
it was designed for. They ran them into electrically short wire antennas. Whatever a short
wire (whip or horizontal) presents as a load, that was the target. You can match them with
a capacitor because that is what the “intended” load looked like ….

Bob