The *NOT BORING!* Hi-Fi faff chat and sales

[tintin40]

http://www.scribd.com/doc/27113994/Marantz-PM350-Amp-service-manual

Looks very straightforward. Knock yourself out

I'd blow it up.

 

[apache]

Here you go chap. Done a bit more...

1) Headphone amp + power supplies removed
2) Power feed to servo controller cleaned up with passive filters
3*) Dedicated and balanced left / right +/-15v power supplies for analogue output stages designed / built - more headroom, lower noise design than original 12v supply
4) DAC clock layout rejigged to reduce trace inductance and probably reduce clock jitter and noise. XTAL case bonded to ground and glued to board with hot glue
5 & 6) Passive filtering for digital DAC supply (will replace this 5v supply with it's own dedicated supply next)

* This board sits where the output buffer was before it, and all mute circuits were removed. No pops or cracks, ultra quiet.

Output is DC coupled as the supplies are matched so there is no DC offset at the O/P's of the op-amps.

 

[tintin40]

WoW Looks excellent work. Shame i don't live near you. I'd bring amp & Sony cd player.

I bet you could have fixed my Nakimich deck?

 

[apache]

Anything can be fixed - it's just a matter of cost.

What Sony have you got? A lot of more recent stuff is very integrated and all surface mount, which doesn't really offer the scope for meddling

 

[tintin40]

Anything can be fixed - it's just a matter of cost.

What Sony have you got? A lot of more recent stuff is very integrated and all surface mount, which doesn't really offer the scope for meddling

A Sony CDP-590
I'm busy collecting Sony Walkman. Have 3 now and just won a 4th a mint 94 anniversary in London so no postage.

 

[RobMac]

I'm busy collecting Sony Walkman. Have 3 now and just won a 4th a mint 94 anniversary in London so no postage.

Tintin do you know what a WM-36 is? :shock:

 

[tintin40]

Tintin do you know what a WM-36 is? :shock:

I had one BITD

Love Walkman

 

[tintin40]

Just got this 14th birthday version of the Walkman. Goes well with my Black walkman

 

[legrandefromage]

I'll see your walkmans and raise you:

 

[tintin40]

very nice the DD2 Soon will have a couple more Walkmans to show.