Hi jacco,
To be perfectly honest with you, I didn't even notice the reset switch! I was looking at the signal path - taking it all in as it were.
Now, the reset switch is bizarre! Completely bonkers. Not something normally seen on audio equipment. One per channel, or was it a double pole switch? Nice big red cover that you pull up before you can access the switch?
Wow.
-Chris
To be perfectly honest with you, I didn't even notice the reset switch! I was looking at the signal path - taking it all in as it were.
Now, the reset switch is bizarre! Completely bonkers. Not something normally seen on audio equipment. One per channel, or was it a double pole switch? Nice big red cover that you pull up before you can access the switch?
Wow.
-Chris
It's the other way round, the reset button was added to later production items.
(at the back of the amps, even the current production M608/M1108 models)
I see. Paul Kemble includes it on his schematic here for the M408 which must date the feature back quite some time ago. I have no idea of the sequence of their models or how long they stay in production though.
There's a polite assessment
of the protection circuit (and some other interesting and useful stuff) from Andrea Ciuffoli in this link, about repairing a monobloc version: Albarry
Last edited:
2 words : IKEA, Lekman.
(the designer and curent owner of Albarry, Neil Burnett, must have a thing for Ferrari and large power supplies. Check out images of the AP11/AP2/AP4 preamp, 150VA minimum toroid transformer, 15Vdc series regulator IC's)
Attachments
Last edited:
Btw, the M1008 has an ILP 73018 toroidal, which is 300VA and 35Vac, not 33.
The number 7 stands for 300VA, 18 for 35Vac (once ILP gets in your head, it's there forever)
300VA for a bipolar output stage with four TO218 devices of 125W Pd each (Vce of 100V at ~50Vdc rails), pushing a reset button may become a career.
(Mr Burnett mustn't think highly of mains fuses either, it's always 3.15A, regardless of output power level, power or preamp model)
Last edited:
The British and their thing for secret codes, and such.
Kind of charming, in a way.
The ILP standard range went from 15VA to 625VA, numbered from 0-9.
Same deal for the secondary voltages, but turns rather irrational halfway.
(as to be expected, why on earth they find the Frogs odd is beyond me)
Since the late '70s, ILP was the toroidal brand sold by next to every electronics supply store here (and there were many).
Only took a couple of different transformers for projects to memorise the transformer coding system.
Models with 110/120Vac primaries had a 6.3A mains fuse.
From a DIY perspective, perhaps the Albarry amp isn't the worst I've seen but now, here is some real flat-earth audio electronica by Nene Valley Audio.
Note the glued assembly - even the TO218 outputs and the
case are glued: http://www.diyaudio.com/forums/solid-state/212450-beefing-up-nva-ap10p-amp.htmlTo be fair, the case nowadays at least, has CE compliance labelling but if the double insulation is to the same standard as previous,
I would be very concerned if I used it: NVA Amplifier | eBay
At NVA, we use painted wooden side panels for it's superior non-magnetic properties.
Indeed, that's why the rest of the amp case is made of aluminum.
At NVA, we're not fond of metal fasteners, we even use adhesive to stick electrolytics together (AP50 3d ed.)
Long live Brittania, Brittania glues the waves.
Indeed, that's why the rest of the amp case is made of aluminum.
At NVA, we're not fond of metal fasteners, we even use adhesive to stick electrolytics together (AP50 3d ed.)
Long live Brittania, Brittania glues the waves.
Last edited:
From the NVA web site:
"bonded together with structural adhesives to avoid the magnetic contamination of steel screws" (highlite is mine).
As a microbiologist, I love it
Cheers,
Jacques
DNM Design - Home page nicely made, but equally bonkers. But I have a soft spot for Dennis.
Croft seem to have given up with their bonkers hand soldered OTL amps now and are almost sane these days.
Croft seem to have given up with their bonkers hand soldered OTL amps now and are almost sane these days.
Hi jacco,
That's one scary, scary amplifier.
Hi Bill,
Those DNM products are way out there. Have you checked out the pricing? Their premise is looney.
-Chris
Perfect! How about the unshielded input lead that runs parallel with a secondary wire to the bridge rect? Are they cancelling some hum from the circuit by chance?
That's one scary, scary amplifier.
Hi Bill,
Those DNM products are way out there. Have you checked out the pricing? Their premise is looney.
-Chris
Last edited:
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.