tsmith1315 said:
I haven't tested mine but it would seem ppi wouldn't waste the $ installing the jack if the other components weren't also in the circuit. Its just paralleled on the +15/-15v preamp power circuits, right? What I'm wondering is who actually made the sink and end plates, wouldn't it have been more profitable for ppi to leave the din visible to implement their other products?
Yeah, it would only make sense to route the PCB and install the jack if it were operable.
Certainly they were looking ahead in hopes to supply other companies with these same boards AND complementary signal processors.
On a second look, I think those last two Motorola TO220's nearest the DIN jack are the regulators. They just aren't separated from the switching transistors like thay are on the 2075. I don't recall any of the Arizona amps in this era that didn't use 3-terminal regulators for op amp and outboard supply.
The ppiramid (I like that!) seems to have provisions for two rectifier sizes, with the smaller ones installed.
There appears to be significantly more electrolytica in the signal path of the ppiramid, too.
So where are the rectifiers in the 2075AM?
And what's with the 8 small transistors and the long neat row of resistors between the 2075AM's power supply and output plug?
I guess I'll have to bust open my 2075M and have a look.
Certainly they were looking ahead in hopes to supply other companies with these same boards AND complementary signal processors.
On a second look, I think those last two Motorola TO220's nearest the DIN jack are the regulators. They just aren't separated from the switching transistors like thay are on the 2075. I don't recall any of the Arizona amps in this era that didn't use 3-terminal regulators for op amp and outboard supply.
The ppiramid (I like that!) seems to have provisions for two rectifier sizes, with the smaller ones installed.
There appears to be significantly more electrolytica in the signal path of the ppiramid, too.
So where are the rectifiers in the 2075AM?
And what's with the 8 small transistors and the long neat row of resistors between the 2075AM's power supply and output plug?
I guess I'll have to bust open my 2075M and have a look.
If they have the din jack they'll also have the regulators that go with it. Some have the rectifiers soldered to the top of the board and some are soldered to the bottom. Crutchfield seemed to be all over the place as far as the din jack is concerned. The cr2x30 has the jack but no hole for it, the cr2x50 doesn't have the jack or the regulators and the cr2x75 has the jack and the endpanel is drilled out. The cr2x50 uses the same board as the 2x75 but is short a couple power supply transistors.
cr2x30
cr2x50
cr2x75
Pyramid pbsp2075 with rectifiers on bottom of board
cr2x30
An externally hosted image should be here but it was not working when we last tested it.
cr2x50
An externally hosted image should be here but it was not working when we last tested it.
cr2x75
An externally hosted image should be here but it was not working when we last tested it.
Pyramid pbsp2075 with rectifiers on bottom of board
An externally hosted image should be here but it was not working when we last tested it.
My sansui they left the DIN blank. The crutchfield 4ch does not have it on the board at all, the board says 4000 but is similar to the 4200 ppi except it has less PS transistors and PS is a little different. I wish an angel would tell me what plug fits in those.
Is this the guy you like to buy amps from? Old broken MTX black gold 250390269092
Is this the guy you like to buy amps from? Old broken MTX black gold 250390269092
They did the same thing with this 6000: 250393381104
There are way less PS transistors than a comparable PPI.
There are way less PS transistors than a comparable PPI.
Hi
I bought a sansui sm-x500 amp on a auction service because of it's unique radiator fins to house some diy electronics. Actually I didn't have any piece of equipment in mind at the time, and was searching for sansui products in general but the fins just made me buy this amp. I guess I'm not going to hack it up since it has sanken trans and elna caps 😀. One elna is shot and that seems to be it. Don't know if it works but shure does look like it should.
It's pretty rare to come by vintage may I call it car audio electronics in eastern europe so a price tag of 9$ seems to be reasonable on this market.
here are some pics http://s75.photobucket.com/albums/i286/amnesboy/sansui/
Could anyone shed some light on the parameters of this amp? Is it worth repairing and keeping intact?
Cheers to all. I love this thread and the sony xes picture some ten pages earlier. There is something about oldschool amps that makes them light years ahead of todays wierd looking plastic taiwanese crap.
I bought a sansui sm-x500 amp on a auction service because of it's unique radiator fins to house some diy electronics. Actually I didn't have any piece of equipment in mind at the time, and was searching for sansui products in general but the fins just made me buy this amp. I guess I'm not going to hack it up since it has sanken trans and elna caps 😀. One elna is shot and that seems to be it. Don't know if it works but shure does look like it should.
It's pretty rare to come by vintage may I call it car audio electronics in eastern europe so a price tag of 9$ seems to be reasonable on this market.
here are some pics http://s75.photobucket.com/albums/i286/amnesboy/sansui/
Could anyone shed some light on the parameters of this amp? Is it worth repairing and keeping intact?
Cheers to all. I love this thread and the sony xes picture some ten pages earlier. There is something about oldschool amps that makes them light years ahead of todays wierd looking plastic taiwanese crap.
Another STK amp, look up the datasheet for the STK IC and it should tell you about it, measure the rail voltage they are giving it often lower so they can handle 4 ohms. They seem to work well IMO, some blaupunkt and ADS used them though often the low distortion models if that matters.Amnes said:
Anyone see this 300306909448 Alpine 3545 he has a pair. Funny how a 0 bidder is at the top right now. 9 hr left at 170+ship each.
Amnes said:
SM-X500
60W/CH @ 4ohms with 10% THD
50W @ 4 ohms with 1% THD
MSRP $240 up until 1988, but actual selling price was more like $179.
In my experience with Sansui car products from the mid-80's, they performed like average mid-80's Korean equipment.
Their move to PPI-built amps in~1989 was a wise one.
If you have a DIY project that would do nicely in that case, and perhaps with the power supply, don't feel bad about taking it apart.
jol50 said:
Yeah, I gazed longingly at them more than once while repeatedly saying, "You do not need it, you do NOT need it.
Looks like they went for an appropriate sum.
Yeah he got his money out of those alpines, those prices still floor me but I guess they are nice amps. They looked clean.
The blaupunkt STK amps I have work fine, though they seem a little weak on bass in full range response. Thing is they worked wonders on IB subs, that is why I hang on to them. They will run some low power IB subs better than many other amps I tried in that power range. They are 2x60/80rms. I suppose I could run the pair on newer DVC subs IB for more power, if I ever run them again.
Issue I always ran into is amps under 2x60 were only good for tweeters, back in the old 12v ratings. Well unless you didn't need it that loud of course. I have an old alpine 2x40 I've run the electrons right out of for years at a time. It is easy to run right at the limit unlike some other amps.
The blaupunkt STK amps I have work fine, though they seem a little weak on bass in full range response. Thing is they worked wonders on IB subs, that is why I hang on to them. They will run some low power IB subs better than many other amps I tried in that power range. They are 2x60/80rms. I suppose I could run the pair on newer DVC subs IB for more power, if I ever run them again.
Issue I always ran into is amps under 2x60 were only good for tweeters, back in the old 12v ratings. Well unless you didn't need it that loud of course. I have an old alpine 2x40 I've run the electrons right out of for years at a time. It is easy to run right at the limit unlike some other amps.
I bought a ppi pro mos 12 the other day , anybody know the specs?
I can't even find anything when I search the web.
I can't even find anything when I search the web.
12.5 watts rms per channel into four ohms stereo
25 watts rms per channel into two ohms stereo
50 watts rms per channel into one ohm stereo
100 watts rms bridged into one channel at two ohms mono
These ratings are at 12v, its a good bit higher at 14 when the vehicle is running
25 watts rms per channel into two ohms stereo
50 watts rms per channel into one ohm stereo
100 watts rms bridged into one channel at two ohms mono
These ratings are at 12v, its a good bit higher at 14 when the vehicle is running
I just read this cadence was Zed made, was it? If so guess I missed this one. 280356041699 I have another cadence and its a mess inside, about the worst quality I've ever seen.