High-End Regulated Buffered Inverted GC

Status
Not open for further replies.
Jump to Latest
#682
NealG said:
This listening experience is at total odds to what I hear when using a regulated PSU. I don't understand it.
Click to expand...

I must warn that if badly implemented the buffer can only get things worse.
Layout is very important.

Sorry, off-topic:
Neal, do you have any way of contacting Leo before lunch time?
Tell him to read his mail.:bawling:
Thanks.:angel:
 
#685
Nuuk said:
I can see that there should be a set of diodes for the positive regulator and one for the negative regulators. But why can't you run two postive regulators off one set of diodes and two negative regulators off the other set? [/B]
Click to expand...
Hi,
this is possible, but be sure that set of diodes connected to +V reg on one amp is also connected on +V reg on second.
Regards
Milan
 
#686
carlosfm said:
Nuuk, let's see if we find out what's happening with your regs...
You have 8 diodes (2 bridges) and 2 pairs of regs, right?
That is, the two pairs of regs share the same diodes, right?

Now look at the schematic.
You join the output of one reg with the ground of the other one to make the ground, right?
What happens if on the other board you pick the other two lines to do this?:hot:
Click to expand...

Nuuk, read this post again, as I have this feeling...
 
#687
A big prize to Carlos and Milan!

I double checked my wiring and I had connected the postive reg on one module with the negative reg on the other 😱 😱 😱

I now realize how I did this. Originally I planned to make a symetrical layout but then found that I got shorter wiring for the regs and buffers if I had them the same way round for each channel. When I re-routed the wires for the regulator modules, one set was a little short and I changed them over to fit

So the modules are OK and no wonder I couldn't find anything wrong with them. When I replaced the blown cap(s) and tested the module out of the amp, I only had that module connected.

I hope that my experience will serve to prevent others using two regulator modules with one transformer/rectifier unit making the same mistake.

Thanks again for everybody's help! :grouphug:

I now have both modules putting out the correct voltages so time to connect up the attenuator and buffers! I don't doubt all this will be worthwhile! 😉

PS I am now thinking that it may be a good idea to use orange and grey insulation for the PSU wiring on a second channel instead of red and black. This should prevent similar mistakes. :att'n:
 
#693
While listening today in my house, I noticed that the sound improved since I tried it last time and mids were indeed somewhat softer and maybe even more pleasing than my Patek, but bass was definitely worse and resolution was lacking.
Click to expand...


Seems strange to me, but I had the same experience with bass when I tried this a few months ago. Im quite motivated to try this layout again and use the buffer. I suspect I was imagining the lack of bass as logic would dicate bass should be better as do many people here:scratch:
 
#694
If you have the courage to dismantle that again , change 120 for 100 and 2.4k for 2.2k.
Click to expand...

Well, if I can get away from this thread 😉 I am tempted to just go with what I have and not tempt fate with any more changes at present. Although I am dropping more voltage than I would like to, as Pedja pointed out, with two sets of regulators to share the load, this shouldn't be mucj of a problem.

And now I MUST return to the soldering iron! :smash:
 
#698
Nuuk said:
Yes Carlos - go ahead and try these LT1083 regs! 😉

At over 11 UKP each :bawling: , I will want to hear your opinion before spending my own money 😀
Click to expand...
--------------------------------------------------------------------
This is an outrageous price. The 1083s are not that good anyway, rather noisy.

There are much better new LT regs. Lokk at their site and you can alson order. Beware of the $25 postage though.
 
Status
Not open for further replies.
Top Bottom