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Yard Sale treasure :) Pioneer SA-3000 & TX-3000

post #1 of 6
Thread Starter 
So I was looking to replace my 2.1 cambridge soundworks PC speakers with something nicer. I thought about purchasing a second Denon DT-588BA set from a friend ( he bought it at the same time I did for $250 from biglots it was a denon reciever with a 5.1 set of decent boston acoustics speakers) and using that, but honestly I don;t know that I would need 5.1 surround in my bedroom lmao. Yeah it would be nice, but not needed.

The main things I do on this system is (in order most to least) listen to music, play PC games, watch movies and TV.

Well This past saturday while yard saling with the fiance I came across a Pioneer SA-3000 stereo amp and TX-3000 tuner with $10 on the set. For $10 it was too much of a curiocity to not pick up. As it was I know a coupel other people that might have been interested in it so I could even resell it if I wanted to.

I took it home and first hooked it up to a set of JBL 2500 bookshelf speakers and played som FLAC audio out of my PC

the PC has a Realtek ALC892, and says the following:
Onboard PC audio gets better! MSI is the first to implement the most high-end HD Audio codecs available. Don't be fooled by other inferior audio solutions onboard (sometimes you can't even find the driver!) Only MSI offers the Loss-less 24-bit/192KHz HD Audio function with an incredible 109 SNR dB value to provide the most clear & vivid HD audio quality and support 7.1 channels surround sound playback with a 2-channel independent stereo output (multiple streaming) through the front panel 3.5 inch phone jack.

Playing the audio out I really enjoyed the sound, but desired more bass as the speakers I was using really didnt deliver. So I grabbed a set of Technics speakers (don;t have the model # handy I can post it later) I got a long time ago and hooked them up, and quickly found out how sub par those speakers were. Up to a volume level of 4 everything sounded pretty good but past that the speakers quickly developed distortion. Granted though the volume level of 4 was pretty damned loud.

To me however the JBLs seemed to produce some really good high tones and decent mid range, but the lack of bass kinda puts me off a little. The Technics worked good but are too large to put where I would like to put them.

I am also on an extremely limited budget so trying to see what I can do to either impliment a Sub in to the equasion and use the JBLs or find a better speaker set that would fit on top of a desk than the technics I have.

I already found schematics for the SA-3000, and plan on replacing the balance POT since it is a little flakey, possibly do a little cleanup on the set as well, but I think this set could workout well.

I am by no means an audiophile, but I kinda like the look and feel of the set, and they seem to sound pretty good to me. So I am wondering if I should proceed down this path or go a diffrent route. Just looking for advice and opinions

here are the specs on the AMP:

Amplifier SA-3000
Tuner TX-3000
Turntable PL-3000
Cassette Deck CT-3000
Audio Rack B-3000

Something so right in size and sound
The following pages are going to take you through a whole new world of stereo hi-fi components. The new world of the Mini Hi-fi System. You'll find the same fine performance that Pioneer's regular-size components are noted for but you won't find the large cabinetry and big dimensions. You'll find instead a hi-fi system that's been reduced in size but human-engineered for the human hand. You'll also see a uniformity in style that is a joy to find in systems of any size. You won't be able to hear it, but you'll be able to get an indication of the quality of the sound by scrutinizing the specifications. After you've given our system a test listen, we assure you that your ears will confirm what your eyes have already read. The Mini Hi-fi System. Something so right in size and sound-sold only by Pioneer.
The Pioneer SA-3000 Stereo Integrated Amplifier. The big little power source.
For an amp of this size to produce 40 watts of power per channel, you know that some truly advanced technology had to be applied. You're right. Though the size has been greatly reduced we've been able to achieve a very low distortion figure of only 0.02 %. The circuitry itself has been newly developed for the push-pull drive in the Class "A" driver stage of the power amp to greatly reduce distortion in the high frequencies and to improve overall transient characteristics.
Three Independent Power Source Circuits. Sound quality reaches new heights. The internal layout of the chassis has been incredibly simplified and hence is all the more faithful to amp fundamentals. Left and right sections are completely separated for improved quality. Three independent power circuits; 2 toroidal transformers as well as special circuitry for low-level signals greatly improve performance, reduce distortion, eliminate crosstalk while achieving a high level of separation.
Substantially Wide DynamicRange and High Phono S/N Ratio. To keep up with today's recording techniques. A phono S/N ratio of 86dB has been realized by using 3-stage DC circuitry with our new low-noise transistors in the first stage of the equalizer amp. Which all means that the SA-3000 is a good enough amplifier to handle and reproduce even the latest directdisc recordings with wide dynamic ranges.

POWER AMPLIFIER SECTION
Continuous Power Output is 40 watts per channel min. at 8 ohms from 20 hertz to 20,000 hertz with no more than 0.02% total harmonic distortion,
or 40 watts per channel at 4 ohms from 20 hertz to 20,000 hertz with no more than 0.02% total harmonic distortion
Total Harmonic Distortion20 to 20,000Hz, 8 ohms from AUX)
Intermodulation Distortion: (50 Hz:7 kHz = 4:1,8 ohms from AUX)
No more than 0.005 % (Continuous rated power output)
No more than 0.004% (20 watts per channel power output)
Output.: Speaker: A, B
Damping Factor:30 (20 to 20,000Hz, 8 ohms)
PREAMPLIFIER SECTION
Input Sensitivity/Impedance:
PHONO: 2.5 mV/50 Kohms, TUNER, AUX, TAPE PLAY: 150 mV/50 Kohms
PHONO Overload Level: (1kHzT.H.D. 0.01 %) 230 mV
Output Level: TAPE REC: 150 mV
Frequency Response.
PHONO: 20 to 20000 Hz ± 3 dB
TUNER, AUX, TAPE PLAY:
10 to 100.000 Hz + 0 dB, - 3 dB
Hum and Noise: (Short-circuited A network)
PHONO: 86 dB (MM) TUNER, AUX, TAPE PLAY: 100 dB
Tone Control: Bass: ± 10 dB (100 Hz), Treble: ± 10 dB (10 kHz)
Loudness Contour: (Volume Control set at- 40 dB position) + 6 dB (100 Hz),+ 3 dB (10 kHz)
Semiconductors: Transistors: 30, Diodes: 22
MISCELLANEOUS
Power Requirements: 220/240 V (switchable) 50-60 Hz
Power Consumption: 330 watts (max.)
Dimensions: 380 (W) x 83 (H) x 295 (D) mm
Weight : 7.6 kg
post #2 of 6
Quote:
Originally Posted by nintari View Post


Well This past saturday while yard saling with the fiance I came across a Pioneer SA-3000 stereo amp and TX-3000 tuner with $10 on the set. For $10 it was too much of a curiocity to not pick up. As it was I know a coupel other people that might have been interested in it so I could even resell it if I wanted to.

I am also on an extremely limited budget so trying to see what I can do to either impliment a Sub in to the equasion and use the JBLs or find a better speaker set that would fit on top of a desk than the technics I have.

For the money you have an unbeatable deal. This sounds like mid-80s mid fi to me. It can sound very good.

Your biggest exposure is dried out electolytics which can be quickly detected on the bench by measuring the low frequency response of the components. If that is hard for you do to, al least do a vidual inspection for leaking or bulged capacitors.
post #3 of 6
Thread Starter 
1979-1980

I'm by no means an electronics expert but I do have rather good soldering skills and access to quite a bit of equipment and knowledgeable people I like to learn this type of stuff, but sadly the industry is going diffrent routes so I can't justify a lot of education through work lol. (I work at a TV Station as the systems administrator, and years and years ago studied basic electronics and audio visual information repair in the Army, but the army training was over 15 years ago and I never ended up using it, I moved toward computers but always wanted to go back and learn it. But in the TV industry things are moving away from repair it, to smaller breakable stuff you pitch and buy new, or from dedicated electronics hardware to perform some functions to a computer with software to do what you want.... but I digress)

I brought the schematics up on the Amp to show one of the guys here (one of the *ahem* older engineers lol, not that I'm that much younger than him) and he said within a second well this is designed around a push pull circuit and that has a lot of disadvantages and wen t on to explain why lol

He is the type whose dream it has always been to design and build a couple tube AMPs and run three amps for each speaker one for high, mid and low frequencies.



as of right now the only physical things I see is the balance POT needs replaced, I don't see any buldging caps or the like. I do want to take it apart and get all the dust out and use some contact cleaner on some areas.

One thing is for sure it sure looks good with my brushed aluminum HTPC enclosure!! If only I had three more AMPs like this I could do analog out from my system board to each amp for surround
post #4 of 6
Quote:
Originally Posted by nintari View Post

1979-1980


I brought the schematics up on the Amp to show one of the guys here (one of the *ahem* older engineers lol, not that I'm that much younger than him) and he said within a second well this is designed around a push pull circuit and that has a lot of disadvantages and wen t on to explain why lol

Push-pull operation does have a number of features that audio cultists might not like. First off there is that awful inherent cancellation of even order nonlinear distrotion, and then there are all the effciency benefits.

Quote:


He is the type whose dream it has always been to design and build a couple tube AMPs and run three amps for each speaker one for high, mid and low frequencies.

I have no problems with electronic crossovers, but I had enough time sweating out the problems of tubed amps back in the days when they were all we had. I owned a Dyna ST-70 and a number of lesser amps back in the day, and they were all PITAs.
post #5 of 6
Thread Starter 
so let's say I end up using this for music and games on the PC, and use the JBL speakers (to save desk space) I have but desire more bass...

I assume my best bet is to find a sub that accepts the left and right speaker inputs and then out from the sub to the JBL speakers correct?
post #6 of 6
For $10 you made out like a bandit. The Series 3000 components aren't very common, and of interest to Pioneer collectors. The TX-3000 tuner is fairly basic (used their low-end tuner circuit, still a good solid performer) but the SA-3000 amplifier is a gem. Very solid circuit design, and a toroidal power transformer plus a standard E-core tranny for the preamp circuits. PM me if you need a schematic, I have a scan kicking around the hard drive someplace. I have the amp, tuner, and matching tape deck, found it on CL locally for $75. Makes a lovely kitchen stereo!

Todd in Cheesecurdistan
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