(Which I will change soon, too.)Īt the Dolby-regulation stage, even the line-side filtering of the transistor‘s base/zener cathode like at the PB/REC-regulator vanished. It would have needed only one more resistor and some different values and configuration to lower noise some 20-30db. At the regulator, the noisy zener is put direct between GND and base of the transistor without any decoupling, impedance change or filtering. The rectifier-loading-cap-stage produces additional switching peaks half the cycle in the AKAI-configuration.
Sorry, but this reg is noisier than any standard Lm317/337 with only input-output-caps, it only outclasses a 317 by its high 200Hz-ripple. (Of course, I am able to measure GND correctly close to regulation). Start with the 5-part-per-voltage-regulation for the PB/REC-preamp.
Akai tapedeck gx 95 free#
Now to the PS: Be free to take a look on the V-regulation of this AKAI or measure it for your own, as I did. I’m still amused about all these people keeping almost 30 years old, dry caps while restoring all the rest with high effort. The AKAI GX75 MK2 power supply is still a bad joke The power supply board needs to be replaced for a more adequate one (separate, regulated supply rails for all DC, new tordorial transformer). So recapping with Panasonic FM/FC and Nichicon Muse BP is a MUST DO.Ģ. After more than 27 years, I trust these little yellow AKAI branded caps as far as my dustbin is close to my desk. So this has real potential IMHO.įor me, there are two things more to do in addition to all the great changes, all of you mentioned: *bigthumbup*ġ. But these regulators cost a fortune in a tapedeck designed to cost some 1000$ (correct me with the 1992 price).Īnd indeed, the unserviced Mk2 is worlds apart in sound from a fully serviced, recapped and recalibrated Mk1. Something you never have with a Lm317/337 regulator, you see in so many British good-old-days high-end devices. But you still see some ripple on the regulated supply rails +/-9V DC for Dolby or PB/Rec amp on the 10mV oscilloscope screen. Unregulated, you have a double-saw with some 0,45Vpp on 20V DC. The Mk2s supply -although more simple- is technically much better, but still not at a level, I have seen at any real or potential „high-end“-device. All main transport commands can be issued remotely with a wired remote control.Sorry, I recently bought an MK 2 and you‘re right. Connection to other audio components for plaback can be achieved by a RCA cable and recording from a source by a RCA cable. For undisturbed listening a jack connector for a pair of stereo headphones is supplied. To make live recordings this deck has 2 microphone inputs to connect microphones with a jack connector. The switchable MPX filter of the GX-F95 filters out the pilot signal, and assuring proper Dolby processing of FM stereo programs. The 19kHz multiplex pilot slgnal present in FM stereo broadcasts can cause false triggering of the noise reduction system.
The Dolby-B system reduces tape hiss on tapes recorded on the GX-F95 by as much as 10 dB at the highest frequencies. To ensure the best response from the wide variety of tapes available adjustment of, bias, equalization and sensitivity, to optimum levels can be performed prior to recording. Full-logic transport controls used on the GX-F95 let it respond to the slightest finger contact for fast and effortless transport function selection. Level meters used on the GX-F95 are generic digital peak reading meters. Tape eject is operated mechanically and the cassette needs to be placed with the side to be played facing forward in the cassette well. Typical front loading cassette deck with the cassette compartiment located on the left side of the deck. The main features of the Akai GX-F95 are: 3 heads and off-tape monitoring, digital linear tape counter with 4 digits, automatic tape type selection and capable of handling normal, chrome and metal tapes, single capstan transport. This Akai GX-F95 is a stereo cassette deck with Dolby B noise reduction, it was first sold by Akai in 1981 with a recommended retail price of USD $795.
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