Another AG9016 "addict"

[Cees66]

Another AG9016 "addict"

Hi,

first of all my copliments on this forum, especially the links on tube related articles, often on entry-level, are very very helpfull.

As a brief introduction, I just finished (re)building my first EL84 SE amplifier (Kontakt KT7). Although I bought the amp in "working" order it needed some new capacitors and a by-pass of the input section in order to get a reasonable sound.

After a while I decided to fully strip the amp, and rebuild it from scratch with new (and preferably better) parts, and although I had minor knowledge on tube electronics, I managed to get it up and running again.

I am actually working on a site were the rebuilding process will be described in full with detailed pics, and as soon as it is finished I will drop a link as I feel that this could be interesting for other applicant Kontakt/Bocama/Lafayette rebuilders.

Now only recently I bought a philips AG9016 amp which is the next project I want to dig in to. I have read the topics on this forum on this amp, i.e. 40 yrs old philips AG9016 flea-power ?,
and there seems to be somesort of "improved" schematic were most of the C's and R's are removed?

There was actually an article in a magazine called A&T (!?!) how to "pimp" this specific amp, but somehow I cannot find it anywhere on the net.

To make a long story short, all (schematic) information, additional tweaks etc., are more then welcome !

Thanks in advance

Cees66

 

[Svein_B]

There are a couple of threads on this sweet little amp:
40 yrs old philips ag9016 se flea-power ?
The diagram for the complete rebuild as published in AUDIO&TECHNIEK does not look very sound to me. EL95 pentode with no feedback

A more recent tread:
Need Help. Anyone with Philips AG 9016??
where I described a couple of smaller mods, without destroying the original design.

SveinB.

 

[Cees66]

Hi Svein,

thanks for your feedback, the tweaks that you had suggested
in previous threads are already on my "to do" list.

I was just curious how the schematic with mimimal C's and R's
would look, and if it was worth giving it a try, so if it is still available somewhere I would certainly like to have a look at it.

How do you feel about skipping the tonal part, by bypassing
the bass and treble pots, it seems like a passive circuit, so
bypassing it would give the same tonal characteristics as with
both controls set to full I believe..

Regards
Cees66

 

[audiokit.nl]

Hello, look at my site to see the part about skipping the tonal part.
www.audiokit.nl and go to modifications. The amp sounds very clear, also when done on the original printboard. If you want I can send pictures of the mod. on the printboard.

regards,
Benny

 

[workonwomen]

Hi "audiokit.nl", can I find somehow your work? Wish to learn about Ag9016 what works. Plan is to skip loudness, tone control (so one half of ecc83 also skiped which fixes phase, in default it should be -180 if I read well). But in focus also the C13, C14 to restore flattness, while not causing vobling at high frequencies (negative feedback may turn positive on high freq due to phase shift if transformer) Oh and of course cathode electrolythes replaced to new/bigger + also the power caps adding a coil.