AIWA HS-P77 / HS-P70

AIWA  HS-P77 / HS-P70

AIWA CassetteBoy HS-P77  Japanese Red Version
(from 1985 the successor of the successful and famous HS-P7 /HS-P07 /HS-P02MkII)

Have It Both Ways! 

Quality Extras and Auto Reverse in a Super 
(    (   (  (  ( (((   Slim Design   ))) )  )  )  )   )

Want a player that’s light & compact, or one with extra features? 

AIWA’s HS-P77 lets you have it both ways. You get 3-way auto reverse and the superb fidelity of Dolby B, all in a slim and light player that weighs just 260 grams— including batteries! Just 25.3mm thin, the HS-P77 sets the standard in ultra-slim auto reverse players. Auto Reverse Convenience Just 80mm by 110mm, the HS-P77 slips easily into all but the smallest pockets. Once it’s in, you won’t have to pull it out every time the tape finishes thanks to 3-way auto reverse. The reverse mode switch enables continuous or one-cycle auto-reverse operation, while manual reverse at any time requires just a single touch.

Compact pocketability or extra features?

Now there’s no need to choose because AIWA's HS-P77 gives you both. You get the extended playback of 3-mode auto reverse, the superb fidelity of Dolby B noise reduction, and the convenience of cue & review—all in a slim and light player. Weighing just 260 grams with batteries, and measuring only 80 x 110 x 25.3mm, the HS-P77 sets a new standard in ultra-thin cassette players. It's the ideal pocket music companion you’re sure to take with you wherever you go.

Aiwa's smallest auto-reverse player
Just 80 mm wide and 110 mm high, it slips easily into all but the smallest pockets. Slim enough to slip into most any pocket, the HS-P77 weighs only 260 grams with batteries. And thanks to auto-reverse convenience, you’ll never have to turn the tape over at the end of each side, because the HS-P77 does it for you—automatically. During play, a single touch reverses tape direction and plays the other side. 

Snippet from: Aiwa Personal Stereo Catalog 1985

The HS-P77 is the result of AlWA’s long and serious dedication to quality miniaturization.
With such compact convenience, it's your own personal companion for music enjoyment—no matter which direction you're going!

AIWA HS-P77 Green version with the Original Earphones: the plastic on the front panel designed for a better grip. Even though Aiwa designed it to tuck it in a shirt pocket, the plastic grip is really the opposite message - to hold it while you enjoying it!

Dolby noise reduction and more for improved fidelity

Dolby B is the most widely-used system for improving playback fidelity.
Now you can enjoy better quality sound because the HS-P77 has Dolby B noise reduction to provide low-hiss playback of Dolby-encoded tapes. For extended frequency response from high-performance Metal and CrO2 tapes, the HS-P77 has a Normal/Metal (CrO2) tape selector which allows the proper playback equalization for all types of tape. Finally, AlWA’s low-noise coreless DC servo motor and quality drive system contribute to the quiet and stable tape drive for minimal wow and flutter.

AIWA HS-P77: This model have a plastic Stop button different from the others because it also uses as the Cassette Eject

Anti-rolling mechanism for extra stability

Whether you’re jogging, bicycling or dancing, tape playback won’t be disturbed by annoying wow caused by changes in position: The special anti-rolling mechanism employs a pair of large flywheels to absorb changes before they can affect tape run.

PLUS:

•Cue & review
•Metal (CrO2)/Normal tape type selector
•Auto stop in Play mode; silent off in FF and Rew modes
•Convenient reverse mode selector plus manual reverse switch
•Extended battery life—up to 8 hours with two UM-4 (AAA) alkaline batteries
•High-performance lightweight headphones
•AC operation with AlWA’s optional AC-620 AC adaptor
•Supplied with belt hanger, carrying case, and shoulder strap
•High-fidelity headphones, carrying case and belt hanger supplied
•HS-P77 - 7 Colors: Silver, Black, Red, Pink, Green, Blue & White
•HS-P70 - 3 Colors: Silver, Red, Black

Snippet from: AIWA AUDIO & VIDEO Japanese Catalog June 1986

AIWA HS-P77 Green Version with it's Protective Carrying Case

HS-P77 SPECIFICATIONS:

TYPE: Ultra-compact auto reverse stereo cassette player
POWER SOURCE:  
DC: 3V, battery size "AAA", R-03 or UM-4 x 2.
AC: through AC adaptor AC-620.
FREQUENCY RESPONSE: 40 ~ 16,000Hz (Metal tape)
MOTOR: Coreless DC servo motor
DIMENSIONS: 80(W) x 110(H) x 25.3(D)mm (3-13/16" x 4-3/8" x 15/16")
WEIGHT: 245g (8.7 ozs) without batteries
ACCESSORIES: Stereo Headphones, Carrying case, Belt hanger, and Shoulder strap.

Right: "POCKET SIZE STEREO" - HS-P70 Boxed. Left: AIWA June 1986 - HS-P70. 

AIWA HS-P77 - Super Permalloy Head (PH)

Technical info:


<CASSETTE PLAYER SECTION>
Track type: 4 tracks, 2 channels
Tape speed: 4.8 cm/s.(1 7/8 ips)
Signal to noise ratio: 50± 4dB (DC/AC) PB (Unweighted)
Frequency response: 40~12,500Hz (NORMAL)
40~16,000Hz (METAL)
Output power: 20 mW + 20 mW (EIAJ/DC)
Noise level: less than 8 mV / 
Less than 9 mV (DC/AC VOL. MAX)
Distortion: Less than 2.5% (PB)
Motor: Coreless motor
Head: Super permalloy head (PH)
Automatic stop system: Mechanical auto, FF/REW motor
Automatic stop time: less than 2 s.
Wow & flutter: 0.3% (WRMS)
Pinch roller pressure: 170 ± 10g (1.67± 0.09N)
Take-up torque 25g-cm (2.45mN • m)
FF/Rewind torque 90± g-cm (8.82± 2mN .m)
Rewind/FF time: 130± 20 s. (C-60)

Output: Headphone jack (3.5 Ø)


<HEADPHONE SECTION> 
Type:  Dynamic type
Impedance:   29 ohms
Frequency response:   50~20,000 Hz
Sensitivity:   107 dB/mW
Maximum input:   100 mW

More to come...............