Malefoda said:
Wow, super upgradeable!! Those caps look rubbish, but... There's clearly loads of room for bigger ones, and ditto the transformer. If you could find a larger tx and physicaly larger (possibly same uF rating but better) caps (such as BHC Aerovox etc. - search the forum) then you could improve the bass (and the rest) somewhat. Some kind of service manual would help you identify which other caps could be upgraded to good effect. You could have some fun here and produce something more worthy of partnering your cd player.
Simon
Hi Andrew
Do I have to search for this or will you be kind and explain?
Does this mean to connect via an inductor or resistor?
There is definately a loop here. I'd like both pieces of kit to have a connection to safety earth as it seems to sound better.
You could have a point, but I took Brent's advice on wiring the earths in this way ie. using two stars, which will be joined by a low resistance jumper.
I did initially only use the CDP star but (as said in subsequent posts) the sound greatly improved when I added a star ground in the power supply and connected it to safety earth (both chnges done in one step).
I have considered what I have done, but don't take me as arrogant, I realise there's room for improvment as the player has a high level of noise now.
Simon
ps please see edit above
AndrewT said:
Do I have to search for this or will you be kind and explain?
Does this mean to connect via an inductor or resistor?There is definately a loop here. I'd like both pieces of kit to have a connection to safety earth as it seems to sound better.
You could have a point, but I took Brent's advice on wiring the earths in this way ie. using two stars, which will be joined by a low resistance jumper.
I did initially only use the CDP star but (as said in subsequent posts) the sound greatly improved when I added a star ground in the power supply and connected it to safety earth (both chnges done in one step).
I have considered what I have done, but don't take me as arrogant, I realise there's room for improvment as the player has a high level of noise now.
Simon
ps please see edit above
My mains is dancing... not too much right now!
http://dl-3.free.fr/52616e646f6d4956a2eaf2723a735cc6f4ce53df2934d10a4a4aba77c2cec7b1/DSCN1723.AVI
Will have a look to amp upgrade...
http://dl-3.free.fr/52616e646f6d4956a2eaf2723a735cc6f4ce53df2934d10a4a4aba77c2cec7b1/DSCN1723.AVI
Will have a look to amp upgrade...
We're starting to go quite off-topic but I wonder whether Matthieu might be better off building a cheap but effective chipamp to try before he starts to get too involved with the Arcam? For the cost of a new transformer, fancy caps, etc for the Arcam he could probably build a very nice Gainclone or Class D amp to try out.
Matthieu, perhaps you should start a new thread on this subject?
Greg
Matthieu, perhaps you should start a new thread on this subject?
Greg
Agreed, a new thread for modding the Arcam, or building a chip amp etc. I personally can recommend the LM3886 chip. It let me put my £900 Roksan Caspian in a 2nd TV system, which is a shame because it does look pretty. They can be built good and cheap and they're easy to work on (compared to a cd player).
Simon
Simon
Hi Simon,
the disconnecting network to connect audio ground to safety earth can consist of some or all of the following all connected in parallel.
Power diode connected in inverse parallel.
Power resistor.
High frequency capacitor.
Thermistor.
I have never used a thermistor but I believe Nelson Pass recommends it.
The audio ground should be isolated from the chassis and safety earth. This requires the use of insulated RCA sockets. The only connection from audio ground to safety earth should be through the disconnecting network.
None of the foregoing stops you continuing to use your star ground as the main audio ground. Since that sounds best, keep it.
the disconnecting network to connect audio ground to safety earth can consist of some or all of the following all connected in parallel.
Power diode connected in inverse parallel.
Power resistor.
High frequency capacitor.
Thermistor.
I have never used a thermistor but I believe Nelson Pass recommends it.
The audio ground should be isolated from the chassis and safety earth. This requires the use of insulated RCA sockets. The only connection from audio ground to safety earth should be through the disconnecting network.
None of the foregoing stops you continuing to use your star ground as the main audio ground. Since that sounds best, keep it.
Malefoda said:
HI.
My contribution to this off-topic...
I do not think your Quads are to blame for lack of bass. I use these and the bass is there and tight. (Of course, due to the type/size of speaker, very deep bass is not present.)
If you want to try a chip amp, the T-Amp (with a good PSU) is a very good start point.
Andy
rowemeister said:
OMG, you have no shame!
rowemeister said:
With built-in toffee !!
Ditto the 'carefully' bit - most scopes have their 0v input bolted to mains earth...
Anyway, looking at the mains makes for depression - see bottom pic here:
http://www.acoustica.org.uk/other/mains_noise.html
- and the fixes usually proposed don't work:
http://www.acoustica.org.uk/other/filter.html
