hifi engine

Manual Library / Pioneer

Pioneer TX-9800

AM/FM Stereo Tuner (1979-81)

add a review add a review

Pioneer TX-9800


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.


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


instruction/owners manual   English - Herbman1975

HG schematic   English - KlausM

S S/G schematic   English - KlausM

Related Catalogues

Hi-Fi Stereo

Stereo Components

If you have any problems opening files please read the download FAQ. All files are provided under strict licence and reproduction without prior permission or for financial gain is strictly prohibited.

If you have additional documentation please consider donating a copy to our free archive.


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

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


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.

This website is not affiliated with or sponsored by Pioneer. To purchase TX-9800 spares or accessories, please contact the company via their website or visit an authorised retailer.