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Concept receivers - documentation posted.

Wanted: Concept 12.0D Owner's Manual

I am looking for the schematics for the Concept 12.0D. Schematics were normally part of the Owner's Manual on Concepts. Does anyone have the schematics and/or the Owner's Manual on print or as scan for the 12.0D? Email as per signature. Thanks.
 
Concept 12.0D. Concept CE-M. Schematics.

Thanks to contributions from Mike George, Pacific Stereo bench tech "back in the day", we have added these scans to the database:
  • 12.0D Schematics (regrettably, not complete)
  • CE-M Crossover schematic.
When PS went out of business some time in the mid-80's (the exact year escapes me at the moment), Mike and a buddy tech acquired essentially all the tech documentation left in the business, whether on paper or microfilm.

More Concept information will be forthcoming thanks to Mike - so as they say, "watch this space"!

Thanks, Mike!:thmbsp:
 
16.5, 7.5D, 11.0, 6.5, 5.5, 4,5, 2.0 schematics now available!

Thanks to additional contributions from Mike George, we have added these schematic scans to the database:
  • 16.5 schematic (different copy from the current scan currently in the database - there seem to be different variations of this model, as has been verified by SoCal Sam. :scratch2:
  • 11.0 schematic.
  • 7.5D schematic.
  • 6.5 schematic.
  • 5.5 schematic.
  • 4.5 schematic.
  • 2.0 schematic.

With only a few minor gaps remaining in the database, we now have covered just about every Concept receiver (and beyond) with schematics: This is an absolutely stunning achievement for this rare marquee, and an important component in safeguarding the continued survival of this much-loved equipment for the many Concept owners here at AK and beyond.

Thanks a million to Mike for stepping up and completing the difficult task of converting microfiches and other odd-ball analog format material to digital so we can offer the information for online distribution for all to enjoy and benefit from.:thmbsp:

Thanks, Mike!:thmbsp:
 
Hi, Njord Noatun, thanx very much for your efforts. :thmbsp: I just aquired a beautiful Concept 5.5 receiver today, & REALLY like it (using EPI 100Ws). The only flaws in this one are a couple tiny nicks at the top edge of the faceplate (above the logo), and a tiny dogear in the rosewood veneer, in the back corner, hardly noticeable. :smoke: Since the 6.5 is rated @ 65wpc, I assume the 5.5 might be 55wpc? I'm totally new to Concepts, so obviously that's just a wild guess. :scratch2:
 
spaceman said:
I'm totally new to Concepts, so obviously that's just a wild guess. :scratch2:
Click to expand...
That is correct - 55wpc. It was the 1st generation (around 1976) TOTL Concept receiver (2nd gen 16.5, 3rd gen 12.0D).

Because it was TOTL, I would say it is definitely one of the Top 3 Concept receivers in terms of desireability, and likely as well built and as good sounding as any vintage 55 watt receiver out there.

Congratulation - please share your listening experience as you get more settled with it. :thmbsp:
 
Sweet, nothing like stumbling on a TOTL receiver to make your day. :banana: I guess my pure dumb luck makes up for my lack of smarts, lol. :D Impressions so far are, it's VERY well built, and the 1st thing I noticed when I opened it to clean & check it over, was the notice on the transformer. I should have written it down, but it was to the effect that each unit was bench-tested to assure the quality was up to spec. :thmbsp: The only thing I DON'T like, is the detented volume pot, it makes it hard to set the right level, but I can learn to live with it. What I love about it, is the tone controls, essentially bass, mid-bass, mid-treble, & treble, on 2 dual-pots (?)which let's you set them exactly how you like the sound. About 9:00 on the volume fills my small listening are pretty well, but I'll have to wait till tomorrow to really blow out the carbon. :music: So far, I'm loving it, it's very realistic, but I don't really know how to describe the soundstage & such accurately.
 
spaceman said:
The only thing I DON'T like, is the detented volume pot, it makes it hard to set the right level, but I can learn to live with it
Click to expand...
Does the 5.5 have the variable loudness like many of the other higher end Concepts? If so, you can use the combination of the volume and variable loudness buttons to achieve just about any volume level spot on. If not, I guess you have to live with it.

What speakers does your Concept drive?

Looking forward to further listening impressions.
 
No variable loudness, just a "normal" loudness button. BTW, I didn't realize the push-buttons were lit on these before I got this one, which is a major bonus, too cool for words. :smoke: All the lights work except one, whatever is similar to the stereo light, to the right of it. My speakers are EPI 100Ws, but they have the 8" AlNiCo woofers from a pair of ESS Tempests in them. I also have a stock pair of woofers in EPI M100s, and I've A/Bed them on my Sansui 7000, & very much prefer the ESSs. :yes: When I went to check if I had a variable loudness, "Those Shoes" by the Eagles was just starting, and it helped me find better words to describe the sound. When percussion is being played, you don't just hear cymbals, you know for sure when it's a crash, ride, or hi-hat being played, because it's accurately reproducing the sound, like it's supposed to. And you never get confused with the bass drum & bass guitar, lol, they're totally different instruments, and make totally different sounds. I might have to look at that volume pot closer, I remember removing the little "BB" from one, on a cheapie receiver some time back, when I was a little less experienced. ;)
 
I am glad you like it, Spaceman! My 16.5 can hold its own against anything in its class that I own (including, but not limited to, a G-9000 and an SX-1250), and so have the smaller Concepts I have had the privilege to listen to.

I can't remember exactly what that "missing" bulb might be for: Most Concepts have no other light than the stereo light, but some of the older models (likely also incl. the 5.5) have a little cutout window with a plate behind it above the tuning scale. It is not supposed to be lit, and I have not figured what it is for - and that's not for the lack of trying!

Somebody here described how to remove the steps from the volume control, but if it was mine, I would leave it alone. However, the volume control steps are really large on mine - at 10 o'clock it is pretty much impossible to be in the same room as it, leaving only a few precious steps between silent and too loud: Of course, with the 16.5 variable loudness one can compensate for the excessive steps
 
Sorry to take so long, NN, but the s/n is 104794. I pulled the faceplate to clean everything good, including the pots & switches, and the pots are nothing like the one I modded awhile back. These ones have a small plastic gear that's visible from the openings, & I decided that was something NOT to tamper with. ;)
 
I can't remember exactly what that "missing" bulb might be for: Most Concepts have no other light than the stereo light, but some of the older models (likely also incl. the 5.5) have a little cutout window with a plate behind it above the tuning scale. It is not supposed to be lit, and I have not figured what it is for - and that's not for the lack of trying!
Click to expand...

It is a Protection light. The 3.5 OM explains it.
 
torrus said:
Thanks NN for maintaining this database.
Click to expand...
You're welcome, Torrus.

Now, please don't tell me that that Charger in your avatar is yours - that will make me might jealous, and remind me about the day when I stupidly sold mine.:tears: ('69, yellow, black vinyl top, 383 ci, factory AC, factory sport wheels).
 
Njord, I 'borrowed' the image - reminded me of my '70 R/T (dark green/ white top, 440-4V) which I bought in '78 and eventually sold ('97)...I was recently contacted by the person who bought it in '04 and is restoring it - so it will be on the street again.
Cheers to Mopar memories!
 
torrus said:
Njord, I 'borrowed' the image - reminded me of my '70 R/T (dark green/white top, 440-4V)
Click to expand...
Excellent - a 4-barrel Magnum, right? Glad to hear it is brought back to its former glory.

Here is a photo of a very similar one to mine (borrowed photo) - pretty much identical, except I had the white-letter sidewalls (as opposed to the Redlines in the photo).

attachment.php

Gosh, I regret I having sold that car!:no:
 
16.5 manual, schematic in hi-res.

Thanks to scans and donations by Fcarpcarp, the following documents have been added to the Concept Manual Scan database:

  • [*]Concept 16.5 Owner's Manual w/schematic
    [*]Concept 16.5 Schematic
Both documents have been scanned to ultra-high specifications - 1100 dpi for the schematic and 600 dpi for the text. The front cover is done in full color. This is by far the highest-spec scan I have ever seen for any vintage stereo component: The schematic is completely sharp and with no loss to resolution even at 800% magnification or higher.

The old, now inferior, 16.5 documents have been retired to make room for the new and improved versions.

Thank you, Fcarpcarp!
:thmbsp:

Best regards,
 
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