The Oberheim OB-XA, a synth from the 80's, uses the connectors on the photos to connect voice cards to the main board. I want to replace them all and am trying to source them but I don't even know their name. thanks in advance for any help!
ps. sorry for the crappy mobile pics, but I think...
greetings Audioguru! Hi Ante! Glad u remember me!
Our console's PSUs were finally relieved from their pain with some great BHC filter caps and a neat job refurbishing almost everything. A big fan (a home-use one) cools them down especially on these hot summer days that they need it so much...
you're kidding me! Is it such a complicated device this power conditioner thing? No one of you electricity experts ever built or planned to build one from scratch? Apart from being very interested in building one for my needs, I am also so curious to find out why conditioners (AVR whatever they...
Hello folks! Anyone ever got involved in a DIY Power Conditioner? Capable to handle at least 1000VA. Please share thoughts and/or schematics.
Does anyone know if this cheap APC Line-R 1200VA Power Conditioner is any worth at all? I find it strange to be so low in price (about 50euros here)...
Happy new year to everyone!
Haven't tried any special diodes yet. I want to ask two very newbie things that I am curious about:
1) My PSU uses two 4700uF smoothing caps (in parallel so total capacitance is 4700x2). I am going to replace them because they are very old. But as the opportunity...
hmmm bloki, do you know if the LT1083 or LM338 will oscillate when caps have low ESR?
Ante, have you ever used all these diode types in linear regulation circuits so as to make a fair comparison?
Best regards, Nid
Hi Ante, you are right. Even though I have currently no known problems I think I am trying to accomplish the most efficient, clean energy (RF free) power supply I can make for my mixing desk. Nevertheless I've read that Hexfreds give a significant performance gain in the overall sound such as...
...by the way, is "Schottky" and "Shotkey" the same thing? What about FRED and Hexfred? Is there any difference in performance between using discrete diodes and bridges?
Hi dear friends!
I've recently discovered the existence of Shotkey and Hexfred diodes which are said to be the best type used for rectification in audio PSUs. Can someone enlighten me on this as well as diodes in general? (fast,soft recovery etc)
Thanx a lot!
Nid
Hi! In the rail were caps get hot I measured 21.7VDC and 0.04VAC from the rectifiers' output whereas in other rails (where caps don't get hot) the AC voltage was max 0.02VAC. These 40millivolts can't be the cause for heat in the caps, can they? Caps are within specs. Old caps were also getting...
hope someone checks this question out:
Is it natural for a polarised aluminum electrolytic capacitor to get hot? What can the reasons for that be? I am not talking about small ones (let's say at least 4700uF @ 16V).
Thanx!
thanx Ante. Is this stuff nice for cleaning reel-to-reel tape recorders' heads too?
MP, what 0 ? If you mean the 0 at my rough drawing then this is the resistance at pins 2-3 at gang-1 and 1-2 at gang-2 ONLY when the pot is at the fixed center position. If I rotate it then the resistance rises...
Hmmm, if you mean acoustic levels I think about 2db max. My speakers were never out of phase, I mean for several years...hey I am a damned sound engineer.
lol...not everyone is an audio guru.
OK. Here I have in front of me 2 spray cans. Both Philips. One is the blue "DEGREASER CLEANER", the...