Modification
Hello Jean Paul,
Thanks.
That's quite a modification!
Loose everything except the powertrafo, outputtrafos and tubes.....correct ?
Could all be put in a very small housing, hardwired and looks quite incomplicated.
You have any idea of the soundquality compared to the original amp? (not mentioned in the articles ?)
Probably best to find an ag9016 in a not so good condition to get the major parts (which should not be a problem - I see them advertised everywhere at the moment). I feel mine is a bit too good to mess up.
Re: partslist
Could you please give me the value of R9 (very hard to read)
Jean Paul, although this mod is a bit bigger than I expected, I probably will get the parts and build me this little amp (looks easy enough for a newbie...)
Any additional info is always welcome........
Hello Jean Paul,
Thanks.
That's quite a modification!
Loose everything except the powertrafo, outputtrafos and tubes.....correct ? Could all be put in a very small housing, hardwired and looks quite incomplicated.
You have any idea of the soundquality compared to the original amp? (not mentioned in the articles ?)
Probably best to find an ag9016 in a not so good condition to get the major parts (which should not be a problem - I see them advertised everywhere at the moment). I feel mine is a bit too good to mess up.
Re: partslist
Could you please give me the value of R9 (very hard to read)
Jean Paul, although this mod is a bit bigger than I expected, I probably will get the parts and build me this little amp (looks easy enough for a newbie...)
Any additional info is always welcome........
On the contrary, when you modify it it'll be a lot better than it was before. This was the second time the author revised the AG9016. Especially the output stage was changed. You can follow this schematic blindly. It'll fit perfectly in the original case. If you have a piece of aluminum sheet cutted you can cover the holes of the potentiometers for tone control and it'll look good then too. You can also cut a piece of aluminum and mount it instead of the original PCB. Tube sockets can be mounted on this chassis then and the whole thing can be hardwired. You won't regret it.
The author warned for "lifting" the filament voltage with respect to ground. He did that in the first revision because it should be better technically. Unfortunately the EL95's live short when you lift the voltage. He advised to share the input tubes between left and right channel and to lift the filament voltage of the upper tube. You probably need an extra separate 6.3 V supply to do that. He also got rid of the feedback resistor after several listening and measuring tests. He gave the following results and hoped one could keep dry eyes after seeing them
He explicitly pointed out that the measurements did not correlate to the listening experience with this amp. The 170 Hz -3 dB point was not heard when driving real world loudspeakers.A = 30 dB
max. Uo on 8 Ohm = about 4 V eff ( about 2 W )
-3 dB point HF = 50 kHz
-3 dB point LF = 170 Hz
Ro = about 4 Ohm
THD at 0.5 W = 2.5 %
R9 is 1k as Frank pointed out. I scanned the drawings a few times with different resolutions but I couldn't get them any better.
Regards,
Jean-Paul
Hi,
Jean Paul,
I am already gathering the major parts (ie get a second ag9016....). Will probably make a new housing for the amp though- wood and aluminium, to match my modified/tweaked thorens tt.
Frank,
Please feel free to chip in.
Quod est demomstrandum.......
Can this be lifted to even higher level using the same basic parts ? Looking forward to 3 beta.
Alea jacta est..........
For 'speakkies': i am thinking of making my own high(er) efficiency speakers (back-or frontloaded horns, single driver, Buschhorn MK2, Voightpipe, open baffle, line array ?) <My first idea was to go for the Buschhorn MK2 with Fostex 103 or 108. Any thoughts or experience with those ? (better alternatives ?)
Greetz
Peng
Jean Paul,
I am already gathering the major parts (ie get a second ag9016....). Will probably make a new housing for the amp though- wood and aluminium, to match my modified/tweaked thorens tt.
Frank,
Please feel free to chip in.
Quod est demomstrandum.......
Can this be lifted to even higher level using the same basic parts ? Looking forward to 3 beta.
Alea jacta est..........
For 'speakkies': i am thinking of making my own high(er) efficiency speakers (back-or frontloaded horns, single driver, Buschhorn MK2, Voightpipe, open baffle, line array ?) <My first idea was to go for the Buschhorn MK2 with Fostex 103 or 108. Any thoughts or experience with those ? (better alternatives ?)
Greetz
Peng
Philips AG 9016
Recently I purchased a Philips AG 9016 in almost mint condition.
I was lucky to find in the local store 2 IEF connectors, so no change at the input side.
Although it plays very well, I disconnected the loudness, C4 an C 34 which made it much brighter!
I wonder if I could disconnect C13 and C43 without causing any problems. It seems that it might make it more "open" brighter.
I would be greatfull if anyone could help me.
Thanks,
Emiel
Recently I purchased a Philips AG 9016 in almost mint condition.
I was lucky to find in the local store 2 IEF connectors, so no change at the input side.
Although it plays very well, I disconnected the loudness, C4 an C 34 which made it much brighter!
I wonder if I could disconnect C13 and C43 without causing any problems. It seems that it might make it more "open" brighter.
I would be greatfull if anyone could help me.
Thanks,
Emiel
I bought AG-9016 last week, when I listen it with ordinary cd player, oh my god, I really surprised with this little AMP!!! One question, I want to drive matching speakers with this AMP. but couldn't find the matched one,
I tryed old Philips 4ohm speakers (I dont know the model but they are in plastic box with stands,2 way and writes at the left corner Hi-Fidelity),vocals good, tweeting good,bass so so and when I inreased the volume, Vocals starts to sound like shaking !!! Not distortion, the sound of vocal shaking, I don't know why !!!
I also try 8 ohm 90's Sony Midi Music system's speakers,3 way I think, very nice bass, poor Treble, poor vocals !!!
And I even knew that it would be big spakers for this AMP but I drive cs-585 pioneer 60W but ofcourse it is poor !!!
So could you pls advice me the good speakers which matches with this AMP. ??? or to make any easy DIY speakers !!! I thought that to use 8 OHM speakers better to use than 4 OHM speakers with this AMP. bcs of low output 2 W, am I right ?
Thanks Thanks Thanks !!!
I tryed old Philips 4ohm speakers (I dont know the model but they are in plastic box with stands,2 way and writes at the left corner Hi-Fidelity),vocals good, tweeting good,bass so so and when I inreased the volume, Vocals starts to sound like shaking !!! Not distortion, the sound of vocal shaking, I don't know why !!!
I also try 8 ohm 90's Sony Midi Music system's speakers,3 way I think, very nice bass, poor Treble, poor vocals !!!
And I even knew that it would be big spakers for this AMP but I drive cs-585 pioneer 60W but ofcourse it is poor !!!
So could you pls advice me the good speakers which matches with this AMP. ??? or to make any easy DIY speakers !!! I thought that to use 8 OHM speakers better to use than 4 OHM speakers with this AMP. bcs of low output 2 W, am I right ?
Thanks Thanks Thanks !!!
In case anyone is interested - there is a Phillips service manual on sale an EBAY - (photocopy)
Philips Electronics Amp Service Manual AG9016 AG 9016 - eBay (item 230405792947 end time Jan-28-10 10:54:18 PST)
Philips Electronics Amp Service Manual AG9016 AG 9016 - eBay (item 230405792947 end time Jan-28-10 10:54:18 PST)
Last edited:
Hi,
There are basically two ways to connect this amp to a set of speakers: either through the electrolytic coupling cap or through the output xformer.
That is, if it's the one I have in mind with the EL86 output valves.
In both cases it should be much more at ease with high impedance LSs than with low impedance ones.
IIRC the original matching Philips speaker were rated at 60 Ohm nominal impedance. As I said, from memory so check the facts.
Cheers,
There are basically two ways to connect this amp to a set of speakers: either through the electrolytic coupling cap or through the output xformer.
That is, if it's the one I have in mind with the EL86 output valves.
In both cases it should be much more at ease with high impedance LSs than with low impedance ones.
IIRC the original matching Philips speaker were rated at 60 Ohm nominal impedance. As I said, from memory so check the facts.
Cheers,
I've got a 9014: it uses 4xEL86 in direct coupled PP for about 15wpc, no OP transformer at all. It needs the Philips 800-ohm voice coil speakers to work, but WOW! it does sound incredible.
The 9015 and 9018 were very similar but included an output trafo to accommodate 'normal' speakers. (The 9018 has a beautiful wood case.)
The 9015 and 9018 were very similar but included an output trafo to accommodate 'normal' speakers. (The 9018 has a beautiful wood case.)
I made a new back panel for my Philips AG_9016 with new RCA inputs for tape,radio and turntable inputs and add up new binding posts for speaker outs !!!
And today I plan to Soldering the cables from orjinal cables to my new connectors !!! The problem is, I am not %100 sure abt these outputs which is left+ / right+ and left- / right - !!! I am sending you a photo about the back panel and make drawing at inputs, can you help me about the correct connections ???
As you can see, at this strange connector at PHONO stage, I found that input 1-3-5 are ground but which is for left ground-right ground and stereo ? I found that NO.2 is LEFT+ and NO:4 for Right+ !!!
And this tape connector, I already input my CD player, no:1 LEFT +, NO:2 Right + and NO:3 Ground and use this Ground for both LEFT and RIGHT - channels !!! Did I make correct ?
Here is the photo :
Yfrog - philipsag9016achter800
http://img30.imageshack.us/img30/7656/philipsag9016achter800.jpg
I will be so happy if you can help me, thank you very much
Cenk
And today I plan to Soldering the cables from orjinal cables to my new connectors !!! The problem is, I am not %100 sure abt these outputs which is left+ / right+ and left- / right - !!! I am sending you a photo about the back panel and make drawing at inputs, can you help me about the correct connections ???
As you can see, at this strange connector at PHONO stage, I found that input 1-3-5 are ground but which is for left ground-right ground and stereo ? I found that NO.2 is LEFT+ and NO:4 for Right+ !!!
And this tape connector, I already input my CD player, no:1 LEFT +, NO:2 Right + and NO:3 Ground and use this Ground for both LEFT and RIGHT - channels !!! Did I make correct ?
Here is the photo :
Yfrog - philipsag9016achter800
http://img30.imageshack.us/img30/7656/philipsag9016achter800.jpg
I will be so happy if you can help me, thank you very much
Cenk
Instead of trying to figure out the old connectors, i propose the following:
Remove all old connectors together with the resistors on the tape connector.
The mono/stereo switch can also go.
This leaves you with just the shielded wires to the input connector.
Remove also the shielded cable for tape-out. You probably do not need it.
Now you have 6 shielded wires left.
Connect the speakers and touch the center of the input wires with your fingers to identify which one is for each position of input selector and left/right.
Be careful with your soldering iron when you re-connect the wires. The insulation is easily melted.
A nice little amp if you have suitable speakers.
Svein
Remove all old connectors together with the resistors on the tape connector.
The mono/stereo switch can also go.
This leaves you with just the shielded wires to the input connector.
Remove also the shielded cable for tape-out. You probably do not need it.
Now you have 6 shielded wires left.
Connect the speakers and touch the center of the input wires with your fingers to identify which one is for each position of input selector and left/right.
Be careful with your soldering iron when you re-connect the wires. The insulation is easily melted.
A nice little amp if you have suitable speakers.
Svein
Thanks for your help Svein, do you have any recommendation about the suitable speakers with this amp. ??? It is the another problem also for me !!!
Yes I saw it, but I am not prof. at electronics and shematics !!! By the way, my goal is to use this amp. as original I just want to change the old stuff connectors to actual ones !!!
Anyway I already noted your shematic and part list to make it new AMP. by my self, I think it is better to make new i/o modified this AMP. bcs it is already classic and couple of years later they will be too much valuable !!!
I would not recommend the modified schematic published by audio&techniek in post #19/20.
Pentode operation without any feedback is usually not a good idea.
As for speakers, some vintage from Philips and others are often 4 ohm and relatively high efficiency. They are also usually closed box without any ambition for the deepest bass which should suit this little baby.
Svein
Pentode operation without any feedback is usually not a good idea.
As for speakers, some vintage from Philips and others are often 4 ohm and relatively high efficiency. They are also usually closed box without any ambition for the deepest bass which should suit this little baby.
Svein
Output transformers saturating
Hello,
just made some experiments with my Ag9016: I've been able to correct the tone controls behaviour with some mods.
Unfortunately, it's rather been a waste of time because the hard limit of this amp is in the OPT's: no more than half a watt output at 100 Hz without severe distortion. The only way out seems to find 2 good OPT's that can fit inside instead of the original ...
Have you noticed the same fault ?
Hello,
just made some experiments with my Ag9016: I've been able to correct the tone controls behaviour with some mods.
Unfortunately, it's rather been a waste of time because the hard limit of this amp is in the OPT's: no more than half a watt output at 100 Hz without severe distortion. The only way out seems to find 2 good OPT's that can fit inside instead of the original ...
Have you noticed the same fault ?
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