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Akai GX-230D

GX Head Stereo Tape Deck (1976-77)

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Akai GX-230D


The new Akai AC servo motor employed in the GX-230D for direct capstan drive is equipped with 114 gears on bot the rotor and stator sides and a detector coil and magnet are built in on the stator side for a completely new pulse detection system.

With this system, pulse detection is made only once every 114 pulses instead of at each pulse for greatly increased pulse output.

Other advantages of this system over the usual DC servo motor with magnetic braking system include simplified construction, absence of heat generation, and substantially decreased ripple as a result of the mechanical eccentricity of the motor.

One each, GX forward/reverse playback and combination record/erase head guarantees long lasting performance, wider dynamic range and excellent signal to noise ratio.

Model GX-230 is also available and incorporates the same outstanding features as the GX-230D, but is equipped with a speaker jack for playback.


Track system: auto reverse, 4-track, 2-channel, stereo/monaural system

Heads: 2 x playback, 1 x record/erase

Motor: 2 x reel, 1 x capstan

Reel size: up to 7 inch reel

Tape speeds: 3 34  7 12 ips

Wow and flutter: 0.07% (7 12 ips)

Frequency response: 30Hz to 23kHz (7 12 ips)

Signal to Noise Ratio: 60dB

Total harmonic distortion: 1%

Input: 70mV (line), 0.3mV (mic)

Output: 0.775V (line)

Output power: 7 watts

Semiconductors: 41 x transistors, 28 x diodes

Dimensions: 440 x 395 x 205mm

Weight: 15.2kg


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re: GX-230D

Although the tape recorder use to work perfectly all of a sudden the impedance roller completely blocked.
I checked and found that a plastic particle was inside the roller's flywheel. the only way to remove it was to take out the roller block, but a screw under the head block has to be undone. I lifted the head block and after the roller block and remove the particle. I put everything back and the machine worked again, but while playing backwards the tape I notice that the left channel now lower. I also noticed that there was a washer U type that I forgot when it goes. Any help on it?

re: GX-230D

I recently found and purchased this tape recorder and i am really impressed of it's sound quality. The absence of any rubber belts plus it's GX heads it gives an advantage that this machine can last for a long time more. However there is a problem on fast forward/rewind the tape. The eddy current motors seems to struggle and sometimes are unable to complete the operation. Any idea how to overcome this problem???? Any assistance is welcomed. Thank you...

re: GX-230D

Hi Stelios,

after so many years the capacitors around the reel motors have lost their capacity or have even a leakage problem. Thats why I would propose to change C1 and C2 (0,47µF/250V) as well as C3 with a value of 4µF/200V @50Hz (Europe) or 3µF/200V @60Hz (e.g. US). C3 is a double capacitor = 2 x 4µF (or 2 x 3µF). You can of course use a higher voltage which gives you say some margin and/or use
2 separate caps.

I have restored a lot of these machines - and I exchange C1 and C2 without any testing - it's a weak point as well as the transistors 2SC458 - very often a source of misfunction - and including also the capacitors of the rec- and playback amplifier (after so many years they have lost capacity. (whereas the AKAI heads are normally still ok).

kind regards

re: GX-230D

Hi Gerd

Excuse my ignorance.....

The original MP - C2 capacitor popped on my deck last week. I replaced C1 and C2 with electrolytic 0.47uf 250v caps (though I could not determine polarity - were they the wrong type to use?). The new C2 blew again within seconds of trying to use play.

(Update: I see now that I should not have used electrolytic polarised caps as they are for DC not AC).

What type/make/polarity of capacitor are you using as replacement? Do you think the fact the new one blew indicates another problem or was it just because I used a polarised electrolytic replacement?).



re: GX-230D

hello community,

I am fiddling with my grandpa's old Akai GX-230D. I know nothing about this machine other than some quick research online. I have the tape all threaded thru and it's moving along fine. The problem is the sound. I read through the owners' manual and couldn't come to a conclusion if external speakers are necessary to hear the sound or if they aren't needed. Since this is the 230D model there is no specific speaker jack. So I'm assuming I would need to connect it to the "Output" right and left jacks. Any help would be greatly appreciated.

re: GX-230D

Yes, D mean deck - no power amplifier ! You must connect that to the stereo amplifier through output jacks. Otherwise headphones are OK too.

This website is not affiliated with or sponsored by Akai. To purchase GX-230D spares or accessories, please contact the company via their website or visit an authorised retailer.