Help With Capacitor Values

[tazzo]

Hello all

I'm thinking of modding one of the two items available from ebay;

Vacuum Tube PreAmplifier Update Version Brand New XiangSheng Improved 728A

OR

Music Angel Marantz 7 Modified Hi-End Valve Tube Pre-Amplifier 6Z4 6N2 6N1

The problem is that I do not know the capacitor values for any of these items (uf) and (VDAC)

I have emailed the sellers but have not recieved any response yet.

If anyone on here could help, it would be great.

Thanks

 

[artosalo]

I'm thinking of modding one of the two items available from ebay;

Modifying (improving) or just changing some of the capacitors ?

 

[tazzo]

Well, changing the caps and tubes to better ones.

 

[artosalo]

Are present components bad ? How have you observed that ?
And how do you evaluate that new componets are better than existing ones ?

 

[tazzo]

Well they are cheap chinese pre-amps, so I assume the omponents cannot be that great. I am looking to replace the caps with Elna Cerifine/Silmic II which I have used in previous modifications and that I like the sound of.

I'm not looking for a discussion on the matter, just the capacitor values of the above preamps if anyone can supply me with them.

Thanks

 

[artosalo]

Just open the amplifier cover and look what has been printed on the capacitors.

 

[tazzo]

Trying to find out the values before I buy the item(s) so that I know what will fit. The Elna's mentioned above only go up to 100V.

I got the values of the XiangSheng from the seller, so one down...

 

[DF96]

In most circuit positions a cheap capacitor will work as well as an expensive one. In some circuit positions a cheap one may be better. In Chinese amps the main problems can be with transformers and valves, and general safety issues - and sometimes a daft circuit.

 

[SY]

Hello all

I'm thinking of modding one of the two items available from ebay;



Music Angel Marantz 7 Modified Hi-End Valve Tube Pre-Amplifier 6Z4 6N2 6N1

If they're dishonest enough to be willing to steal someone's trademark, how can you have any confidence that they won't also steal from you?

 

[JMFahey]

Well the

y are cheap chinese pre-amps, so I assume the omponents cannot be that great.

1) maybe you are assuming too much.

2) supposing you were right, "improving" 2% of parts will still leave you with remaining 98% cr*p (by your own definition) .... a perfect waste of money.

3) if you want good, buy good from the beginning, and pay what it's worth.