World War II Navy Radio
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NOTE - This is a re-creation of Rob Flory's original site which crashed some time ago - unfortunately some photos are still missing but most of the text is here - if you can help with any replacement photos, please send e-mail to Rob or to Nick K4NYW

Click here for Nick's 1950's-60's Navy Radio Pages -

The TCS was used in many different applications.  I have seen a picture of it in a tent in a forward operating area, and heard of its use in vehicles from jeeps (MZ radio jeep) to cruisers.  Bill Henneberry reported that the TRENTON CL-11 had some, and Norm Gertz reported that the APPALACHIAN AGC-1 had 30 to 40 TCS sets in the Troop Radio Room, used during the ship to shore phase of a landing.  An AGC was an amphibious assault control ship.
My TCS set is more beat-up than a lot of my equipment, and I have installed it in my car as a mobile, using the 12V dynamotor supply and a 10-foot whip antenna.  On 3.8Mc AM I have only been able to work 6 miles, but more experimentation is necessary.   I am trying to simulate the performance of the MZ radio jeep, which had a 15-foot vertical. 
 On 7 and 10Mc CW, I have worked stations out to around 1000miles while in motion. 
While in the Master Oscillator  mode, the TCS is subject to a fair amount of "road modulation", frequency instability due to vibration of the set.  It is not really noticeable in AM mode, but quite obvious on a rough road in CW mode.  I am experimenting with crystal control of the transmitter to see if that improves the stability. 
I have found that although crystals in the 1.5 to 3Mc range are specified for the TCS, FT-243 crystals on 3.5 Mc can be used to give operation on the 80m and 40m amateur bands.
The downside of using crystal control is that the oscillator starts slowly, limiting keying speed.  Since this is mentioned in the manual I am attributing it to design and not to poor performance of my particular unit.  Maybe the oscillator performs better with crystals in the specified range.

Click here to hear TCS on 10Mc

The above recording was made on an RBC receiver listening to my TCS running on dynamotor power supply in my car on 10.125Mc.  I can hear that I need to record it again with more gain.  You can hear the chirp on the signal, but I think quantization noise masks the note somewhat, making evaluating the transmitter note difficult.