Kenwood TS-480 manual Standalone control panel, Focus on basic performance, 200W challenge

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Standalone control panel

For mobile operations, a separate control panel is ideal, but what if the transceiver is also to be used as a base station? This was the problem we faced. With a large desktop rig, it is no easy matter to shift things around to find the best position, so perhaps it would be a good idea to have a separate control panel that could be moved easily. Also, a desktop unit has various kinds of cables connected to it. What with the heat the main unit produces and the noise of the fan, etc., and considering that it does not have to be on the desk in front of you, it would surely be better to separate the control panel and place the main unit elsewhere.

With the appearance of computers in today’s shacks, it is certainly desirable to tidy up the desktop as much as possible. We felt that we could contribute to this evolutionary process. By opting for a completely separate panel, we could ensure that it would be large enough to offer sufficient operating ease, since its dimensions would not be dictated by those of the compact main unit. This was how we arrived at the idea of a standalone control panel that is slightly larger than the main unit.

Focus on basic performance

The appeal of HF lies in DX’ing those places near and far. For this reason, we put a priority on operating ease and basic performance. At this point the project team had already excluded any idea of incorporating the V/UHF bands. Our approach was this: “Rather than spending development money on the V/UHF bands, let’s spend money on HF performance.” “If someone needs the V/UHF bands, then they can buy another product that is tailored for these bands.” This meant we had confidence that our product would offer more than enough punch to perform well even on grueling DX’peditions.

The 200W challenge

As explained, our initial starting point was a desire to create a transceiver like no other. But we would not have succeeded in meeting this objective with just a standalone control panel and an emphasis on basic performance. We needed something more if we were to make the product truly special and stand out from the crowd.

The answer was to be found in the realization that DX operations depend on basic performance and power. Real “power” in a transceiver is something that many people look for. So a radical proposal was made: “Rather than making the output 100 watts, let’s go all out for 200 watts!” But in fact the only transceivers on the market with 200W output were the expensive high-end models. What we were developing was a compact transceiver.

We seemed to have run up against a wall: Did this mean that in terms of size and cost we would inevitably end up creating a high-end transceiver? After long discussions, we made a straightforward decision to challenge the status quo: If conventional wisdom dictated that a 200W output was only available from a high-end transceiver, then we would change that dynamic.

At this point we could not see how this could be possible, but we stuck to our conviction that a 200W transceiver did not have to be expensive. We were determined to provide the customer with a 200W transceiver at a reasonable price. As a result of our single-mindedness, we were eventually able to achieve our goal, creating a product of about the same size as the TS-50 and, of course, it had heavy-duty specs.

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Contents Page TS-480HX TS-480SAT Determination to create a unique transceiver Design ObjectivesBack to basics The appeal of HF lies in DX’ing Focus on basic performance Standalone control panel200W challenge Adding appeal to fixed station operations Overview of the TS-480 SeriesTS-480 concept began with development of the TS-570? Development Objectives for the TS-480 SeriesAchieving 200W output in a compact transceiver Focusing on HF Circuitry TX circuits 200W final sectionTX IMD output 200W SPS separate power sources TS-480HX only SPS schematic diagram100W final section Failsafe device some TS-480HX versions onlyAntenna tuner TS-480SAT 200W final section FM modulation block diagram FM circuitRX circuitry Front end RX 1st mixerRX dynamic range RX sensitivity Jumpers for joy Circuitry after the roofing filter Comparison of optional CW filters 500HzOption installation unit Auxiliary Features Features useful for 50MHz operationsFeatures useful for mobile operations Full compatibility with digital modes data modesNew 5MHz band DSP circuit Features of the Built-in DSPIdeal for mobile operations DNL Noise reduction Demonstrates how ignition noise is reduced by the DNLNR OFF Beat cancel BC OFFRX DSP filters Switching Width During CW operations RX equalizer & TX equalizer CW auto tuneTips TS-480 menusDSP Useful if you want to go on to tune FSK APO Functions that can be assigned to PF keys Assigned Use Split Making menus easier to use Menu switching Quick menuStructural Features Internal structure of the main unitCooling diagram CoolingUpper side Temperature rise around final transistors Page Design concept Constant recording function New Option Voice Guide & Storage Unit VGS-1Message recording/playback function Reset Configuration mode for TX output, etcMenu settings Split mode Voice GuideOther features VFO mode, direct frequency entryMemory channel Variable Voice Guide speedKNS added Main functionsButton layout & basic operation Changing memory and registered details CW keyingCompatibility with KNS Kenwood Network Command System Reading and writing filesSetting up KNS on the Arcp side Accidental continuous TXPage Using a broadband router Checking LAN settings New Option ARHP-10 Amateur Radio Host Program FreewareAdjust PC volume User setupPage Troubleshooting Network & Operations Problem SolutionCannot get KNS to work Sound Problem Solution Connect a microphone to the computer and bring up TS-480 In-Depth Manual