[Milsurplus] A TCS Transmitter Wiring Mystery

[B. Smith]

The TCS "Typical Dial Readings" chart is a very valuable aid when tuning 
SHORT antennas, even to the experienced operator. As you well know with 
your amateur experience matching  a single antenna on different bands- - 
- when you have tuned or matched  your   "antenna system" for maximum 
current (conjugate match)  there are sometimes  two or sometimes three 
settings that will produce a good output but it helps to be in the ball 
park for the correct setting, This "correct setting" gives maximum  
output, best  efficiency, less heating of matching components   as well 
as provide maximum harmonic retention.

BTW the TCS does not have any capability to spot or monitor the transmit 
crystal. I will post a "spot" mod on my web page in the near future.

Yes, it did require a FCC license.

73

Breck k4che
First Class Radio Telephone



On 5/1/2013 9:40 AM, Ray Fantini wrote:
> Did anyone tune the TCS by the chart in the first place? Maybe you used the chart for starting settings and then tuned the transmitter for max antenna current but if you just used the charts and ignored the antenna current meter and the plate current meter why did they install them in the first place?
> The question I would have is was the radio set up by a technician on the crystals that were installed with the readings written down on the front cards and the crews of the boats were  told to set the radio up according to the chart that way or were users of the radio instructed on how to tune the transmitter? Or perhaps back at the dock a tech set the radio on one channel and everyone was told just use that set up channel and don't touch the radio?
> I know it antidotal at best but both of the great grandsons of the TCS the Sunair GSB-800 and the Harris URC-94 have huge stickers on top of the radios that have the operating instructions written for idiots but they do tell you how to change the frequency and tune the antenna.
> In the old days of HF AM marine radio all the transceivers they had for small boats had no provision for any transmitter adjustments for the user, the loading coils and everything was installed in the radio with no user access. My understanding then was that you had to have at least a second class license to set up or tune one of those old HF AM transceivers.
>
> Ray F
>
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