Kenwood TS-480 manual Design Objectives, Determination to create a unique transceiver

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Design Objectives

Determination to create a unique transceiver

The concept of a compact HF transceiver first saw the light of day with Kenwood’s TS-50. From then on, such equipment has become an essential part of the Amateur Radio world. Equipment has now evolved with the appearance of multi-band models.

In developing this new HF transceiver, Kenwood has boldly chosen not to follow this path, because we wanted to develop a transceiver unlike any other available. If we had developed a product along the same lines as the others currently in the market, the customers would not have found it a very attractive buy and few would choose it. This is why we wanted to develop a unique and attractive Kenwood product, something that would effectively serve to create a new market.

It was with these thoughts that we embarked on our new project and began to mull over the details. It was not to be an easy task. After all, every engineer involved in development wants to create something special and innovative. We had to find a way to put it into practice.

Back to basics: “The appeal of HF lies in DX’ing.”

The search for “a completely new kind of transceiver” sounds like it might turn out to be a wild goose chase, and in truth it is in the nature of things that such ideas rarely amount to much. But as part of our brainstorming, we went back to basics. What first emerged as a key concept was this: “The appeal of HF lies in DX’ing.” This is simple to say, but maybe more difficult to realize. From here the discussion moved ahead rapidly once it was decided to develop a compact HF transceiver.

According to conventional wisdom, a compact HF transceiver is by definition a mobile transceiver, and a fixed, base station is physically large. But we refused to stick to these stereotypes as we fleshed out the concept for a compact HF transceiver designed to make DX’ing really enjoyable.

Even if it were to be a mobile unit, as an HF transceiver we wanted to ensure it would offer the operating ease and basic performance needed to enjoy DX’ing.

Consequently, it should also be able to serve as a fixed station.

The typical shack today has been equipped with a computer and there is not a great deal of room available for a large transceiver. This PC-transceiver combination would become even more common.

Operating both as a mobile and as a fixed station, this new model would target customers dissatisfied with the compact transceivers currently on the market.

This was the concept that we started with.

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Contents Page TS-480HX TS-480SAT Design Objectives Determination to create a unique transceiverBack to basics The appeal of HF lies in DX’ing Standalone control panel Focus on basic performance200W challenge Overview of the TS-480 Series Adding appeal to fixed station operationsDevelopment Objectives for the TS-480 Series TS-480 concept began with development of the TS-570?Achieving 200W output in a compact transceiver Focusing on HF TX circuits 200W final section CircuitryTX IMD output 200W SPS schematic diagram SPS separate power sources TS-480HX onlyFailsafe device some TS-480HX versions only 100W final sectionAntenna tuner TS-480SAT 200W final section FM circuit FM modulation block diagramRX 1st mixer RX circuitry Front endRX dynamic range RX sensitivity Jumpers for joy Comparison of optional CW filters 500Hz Circuitry after the roofing filterOption installation unit Full compatibility with digital modes data modes Auxiliary FeaturesFeatures useful for 50MHz operations Features useful for mobile operationsNew 5MHz band Features of the Built-in DSP DSP circuitIdeal for mobile operations DNL Demonstrates how ignition noise is reduced by the DNL Noise reductionNR OFF BC OFF Beat cancelRX DSP filters Switching Width During CW operations CW auto tune RX equalizer & TX equalizerTS-480 menus TipsDSP Useful if you want to go on to tune FSK APO Functions that can be assigned to PF keys Assigned Use Split Quick menu Making menus easier to use Menu switchingInternal structure of the main unit Structural FeaturesCooling Cooling diagramUpper side Temperature rise around final transistors Page Design concept New Option Voice Guide & Storage Unit VGS-1 Constant recording functionMessage recording/playback function Voice Guide ResetConfiguration mode for TX output, etc Menu settings Split modeVariable Voice Guide speed Other featuresVFO mode, direct frequency entry Memory channelMain functions KNS addedButton layout & basic operation CW keying Changing memory and registered detailsReading and writing files Compatibility with KNS Kenwood Network Command SystemAccidental continuous TX Setting up KNS on the Arcp sidePage Using a broadband router New Option ARHP-10 Amateur Radio Host Program Freeware Checking LAN settingsUser setup Adjust PC volumePage Network & Operations Problem Solution TroubleshootingCannot get KNS to work Sound Problem Solution Connect a microphone to the computer and bring up TS-480 In-Depth Manual