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Pioneer TX-9800

AM/FM Stereo Tuner (1979-81)

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Pioneer TX-9800

Description

The TX-9800 RF amplifier 2-stage front end incorporates a 5-gang variable capacitor and three dual gate MOS FETS.

A capacitance controlled double tuned circuit is inserted between the RF amplifier stages.

Those features produce impressive characteristics such as an IHF sensitivity of 8.8dBf, a spurious response of over 110dB and an image interference ratio of over 120dB.

Specifications

Type: Mono/Stereo Tuner

Tuning Bands: FM, MW

Tuning Scale: Analogue

Sensitivity: 1.5uV (FM), 300uV (MW)

Signal to Noise Ratio: 80dB (FM), 55dB (MW)

Distortion: 0.2% (FM)

Selectivity: 85dB (FM), 50dB (MW)

Frequency response: 20Hz to 15kHz (FM)

Output: 650mV (FM), 200mV (MW)

Semiconductors: 11 x IC, 11 x FET, 30 x transistors, 48 x diodes

Dimensions: 453 x 155 x 390mm

Weight: 9.3kg

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Reviews

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rating
Reviewed Jan 16th, 2020 by

Part of a four-way tie for the best Analog Tuner that Pioneer ever produced. The F-26 and 28 are very rare and very eccentric designs. They're FM only and their specs are quite good. But...in the end, their RF and audio performance are not a slam dunk in terms of better performance. In some ways, the 28 is very quirky with respect to being able to de-center tune a station for better audio's sake. (The more crowded the airwaves get, the more likely it is you might have to employ that aspect of a tuner's abilities, and few Digital Tuners can do it.) Contrary to what you've heard, the F-90/99x/9 are not World Beater Tuners in terms of RF ability OR Audio performance. They're quite good and stupid good for the money they bring on auction sites. But the F-93, F-91 TX-9800 and 9500 II Tuners represent the near apex of their AM/FM Tuner aspirations. If you see one at a reasonable price, I'd recommend getting it. Save the 90/99x/9 for your garage system.

 

Comments

re: TX-9800

Beware of tuners with dented corners on the facia few tuners can survive this kind of fall or knock without major misalignment count the tiny station indicators located on the edge of the glass there should be 4 if there are less this is a sign the glass was broken during the drop/ knock and has been replaced. The fact that some indicators are missing means the person replacing the glass was not familiar with Pioneer tuners as if they had been they would know about the indicators and take steps to prevent their loss. Note also service manuals for this model such as available on this excellent site are incomplete with the known revisions on alignment missing so any alignment is best left to former Pioneer engineers who still have the original service manuals and revision bulletins. Oh and on a final note beware of mildew this is caused by the ingression of dampness if the metal covers are covered in it then the same will be inside this will kill a tuner dead. The TX9800 because of its lack of protection is more susceptible to this than the other 9500's. If you see it on the outside avoid it. If it has had the pannels resprayed ask questions look inside it is almost impossible to hide this kind of damage.
Look for genuine ones they are about and in the long run will save you money.

Pioneer T-X 9800 Tuner

FM useable sensitivity: mono 8.8dBf (1.5uV) is as close to theoretical limits as possible: a great tuner.

re: Pioneer T-X 9800 Tuner

hello
Iam planing to get one , Pioneer TX 9800 Tuner does it have 5 gang?...
need some of your input please.
Thanks
MANU

DUBAI

re: Pioneer T-X 9800 Tuner

Yes it does main problem with this tuner is dust and dampness can kill the tuning circuits and cleaning can be difficult. Realigning is a major job in itself and is not a job for a diy man. The best Pioneer tuner you should aim at is the TX9500 mk2 this has the build quality of the older range while being far more advanced.
The 9800 buld quality was not as good and the lack of a protection shield for the 5 gang tuning condenser was a major blunder. To make matters worse Pioneer used a casing with hugh grills which was meant for the SA9800 amplifier result hugh ingression of dust and dampness the earlier 9500 series had small grills because that is all that is needed and dust shields for the sensitive components. Good luck finding one which does not need realigning. Points which give it away are not tuning correctly difficulty getting a lock sounds better off tune. Hope that helps.

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