Recent content by mrdave45

Have a look inside the Sony and onkyo. Are there isolation transformers for the spdif? I don't think all spdif outputs are galvanically isolated. They probably should be. If not that's probably half the problem. Check out lampizators old site. Theres a whole ton of info on cd transports and the...

Hey all, not been here in ages. Been really missing all the tweaking etc but you all know how life is! It strikes me that in the same way the alpha 5 sounds fairly pants out the box but mods quite well, presumably sounds cards on pc's could be subjected to similar treatment. However i see...

Ok, What i have is various sources. Both balanced and non balanced. I have an active sub i need to drive and am about to have a pair of active monitors. I am currently using an alpha 10 amp but the pre whilst well specified is a bit naff. I also have a real nice G&W headphone amp which...

pmsl. well hopefully ill have time over the next couple of days to have a probe and get it working. I can hear its rather monotonic voice whining "fix me fix me", but not very loud cos its signal has dropped to the level of the noise floor (should i say noise shelve!) D.

but if it stayed in tune it wouldnt be any fun.

its a powertran transcendent 2000. I believe originaly built form a kit. Theres quite a lot it can do. sadly only single oscilator plus noise and lfo but has s&h etc. The vco is working but the signal is lost shortly after that. The power supply is reading a very respectable +- 11.9v on the...

As there are a lot of audio buffs here. Presumably some like myself are also musicians. Any body had experiennce tweaking analogue synthesizers? I have just taken hold of some ancients thing that im going to fix, but was wondering if any one had any ideas on tweaking filters etc Hopefully...

Im trying to tweak a negative 5v supply. I used a zener (probably a 3v7) to tie the output to 5 v. Anyway, in order to keep my dacs negative supplys to 10v difference i want to lower(raise?) the -5v which is currently -5.14 to -4.74 to match the -14.74 measured on my super reg. Anyway to do...

Well, i had some mks2s in stock, only 4x 1uf but stuck those in and immediately clearer. Hopefully a week or 2 theyll be sounding fab.

quote- "Wima MKS4s and Evox MMKs work much better for me - no such problems at all." Been having problems sourcing some caps. RS are out of stock and charge a fortune for postage and farnell want me to spend over 20 quid, but i do have mks4 1uF (quite a few actually). My question is, as...

i think michell engineering do one. Keep your eye on ebay, plus, origin live do loads of stuff for the rega arms.

THis may have already been suggested, but what about a PFM group project along these lines. Collectively we have a ridiculous amount of know how. We've had people experiment with different dac's, configurations. Transports, caps, clocks power suplies. Tubes etc. Maybe we could work out a kit...

yeah, im not sure about trying to correct the signal either. However martins balancing act sounds like it could be pretty special. Yep, the valves (when i get them) will be 6c45pi. Its the diyaudiocraft kit i have. Anyone know what happened to them cos there site is no more. From your last...

sadly, its not doing that. That sound like a real good idea tho. how would one go about (a) splitting the digital signal, and (b) making it complementary. Presumbaly theres lots of formatting data etc that needs to be kept intact. etc

Hey, i havnt built it yet, but its a dual 1541 non os board (PRE BUILT) op amp IV (pre built) and a tube buffer board (need to source components for this). The dacs are running in parallel. Any ides why this might be better? D.