Good God, I remember referring this thread when fixing my friend's AI500
not much to fix 'n tweak though, change the selector to alps, several lytics to cerafine black, 0.22uF green ero input cap to light blue ones.
How does your mod now sounds advr? also what is your recommendation for the 2 220/400V big caps?
thanks
TeguhPS
not much to fix 'n tweak though, change the selector to alps, several lytics to cerafine black, 0.22uF green ero input cap to light blue ones.
How does your mod now sounds advr? also what is your recommendation for the 2 220/400V big caps?
thanks
TeguhPS
hi,
A month later and my Ai is very different as well....
many caps are now Jensen paper in oil.
How does your mod now sounds advr? also what is your recommendation for the 2 220/400V big caps?
which one do you mean?
There is nothing left (only the trafo's) from the original anymore. earth scheme is totally different , all in a star to one point with thick cable. All hardwired.
It's sounds superb. There is much more control, depth, 3D, baas, sweet high. No disturbtion at al. No rumble and noise at 10 cm from my tweeter.
I like it. There is stiil much to do but I like it.
Ad.
A month later and my Ai is very different as well....
many caps are now Jensen paper in oil.
How does your mod now sounds advr? also what is your recommendation for the 2 220/400V big caps?
which one do you mean?
There is nothing left (only the trafo's) from the original anymore. earth scheme is totally different , all in a star to one point with thick cable. All hardwired.
It's sounds superb. There is much more control, depth, 3D, baas, sweet high. No disturbtion at al. No rumble and noise at 10 cm from my tweeter.
I like it. There is stiil much to do but I like it.
Ad.
Attachments
they where changed also with 330uF 450V Nippons also the rectifier changed to real diode network
also changed the one Resistor to 4 pieces parallel .
much work.
Attachments
hi,
The dusty things where in place from 1987... I have an early AI 500 MKII Ed de Jong told me that once.
Of course the AI sounds different now then a couple of years ago...
But then not quite different.
The scheme is still the same but now I have a better earth scheme, all to 1 point. All capacitors are new with somewhat greater value and more voltage headroom. The components have better specs and all is hardwired.
It gives much more control, the easyness of the music (sorry for my english), depth, 3d. Music comes more alive.
Of course I tuned the sound a bit for my own taste and the acoustics of my listening room. But I already did that whith tuberolling
But the 8 W (triode) gives now so much more power and less, less distortion at higher sound levels. Also now noise at the Esotec tweeters and only a minimum hum at the woofers. That are the benefit of a good earth sheme!
Even Sjostakovitch, Bartok, Mahler, everything is in place and stays in place how hard it goes... But Pat Metheny is also playing smoothly in y room... I can almost touch him.
So, yes the sound is somewhat different but not much more then with tuberolling.
Now I am searching for a scheme of a DIY Border Patrol. Do you know where to find that?
Regards,
Ad.
The dusty things where in place from 1987... I have an early AI 500 MKII Ed de Jong told me that once.
Of course the AI sounds different now then a couple of years ago...
But then not quite different.
The scheme is still the same but now I have a better earth scheme, all to 1 point. All capacitors are new with somewhat greater value and more voltage headroom. The components have better specs and all is hardwired.
It gives much more control, the easyness of the music (sorry for my english), depth, 3d. Music comes more alive.
Of course I tuned the sound a bit for my own taste and the acoustics of my listening room. But I already did that whith tuberolling
But the 8 W (triode) gives now so much more power and less, less distortion at higher sound levels. Also now noise at the Esotec tweeters and only a minimum hum at the woofers. That are the benefit of a good earth sheme!
Even Sjostakovitch, Bartok, Mahler, everything is in place and stays in place how hard it goes...
But Pat Metheny is also playing smoothly in y room... I can almost touch him.So, yes the sound is somewhat different but not much more then with tuberolling.
Now I am searching for a scheme of a DIY Border Patrol. Do you know where to find that?
Regards,
Ad.
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recommendations
Hi,
I have an Audio Innovations SE 500 and it appears that the controls on the front panel are on the way out.
Each of the selectors and the balance control require careful tapping to ensure i get both channels of audio, the volume control crackles when adjusted.
Can anyone recommend suitable replacement parts for these items and a good supplier for them?
Thanks!
dicki
Hi,
I have an Audio Innovations SE 500 and it appears that the controls on the front panel are on the way out.
Each of the selectors and the balance control require careful tapping to ensure i get both channels of audio, the volume control crackles when adjusted.
Can anyone recommend suitable replacement parts for these items and a good supplier for them?
Thanks!
dicki
Well, I have been looking for the same. Unfortunately the 47k logarithmic pot used in the 500 does not seem to be available. There's a 50k log in Alps, I saw one on eBay called Blue Velvet for £11.50 plus £7 shipping from Germany.
But... I am sure there are many fakes out there, and that's my main concern. My plan is to replace the caps first, because the pot in mine isn't crackling. I will probably bypass the balance pot too, it's not really necessary. Mine's always set dead centre...
But... I am sure there are many fakes out there, and that's my main concern. My plan is to replace the caps first, because the pot in mine isn't crackling. I will probably bypass the balance pot too, it's not really necessary. Mine's always set dead centre...
Go for a tocos 50k from Hi Fi Collective instead. Way better than an Alps blue for only another 10 quid.
.
amplifier valve kits, HIFI pre-amplifiers, speaker kits,AMP Parts, upgrade components
50K Tocos Cosmos RV24 Stereo Potentiometer COS-S50K £25.20 0.050 44
.
amplifier valve kits, HIFI pre-amplifiers, speaker kits,AMP Parts, upgrade components
50K Tocos Cosmos RV24 Stereo Potentiometer COS-S50K £25.20 0.050 44
Sorry for resurrecting this ancient thread. I want an AI S500.
Early vintage have 3-tap output transformers (4-8-16), later have only 2 taps (4-8). Posters state preference for the former, but no one referred to AB test. Has anyone AB tested S500 3-tap vs. 2-tap, both in similar operating condition? The one I sold was 3-tap.
Europe has more S500 for sale than in the US. Schematic seems to indicate mains transformer taps for both 115V and 230V mains: https://drtube.com/schematics/ai/ai500-89-4.gif Do all S500 transformers have taps for both 115V and 230V?
Thanks!
JR
Early vintage have 3-tap output transformers (4-8-16), later have only 2 taps (4-8). Posters state preference for the former, but no one referred to AB test. Has anyone AB tested S500 3-tap vs. 2-tap, both in similar operating condition? The one I sold was 3-tap.
Europe has more S500 for sale than in the US. Schematic seems to indicate mains transformer taps for both 115V and 230V mains: https://drtube.com/schematics/ai/ai500-89-4.gif Do all S500 transformers have taps for both 115V and 230V?
Thanks!
JR
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