capacitor question?

[the_doc735]

capacitor question?

Can I swap a: 3.9 uf, 250v MKP (MONACOR)

For a: 5.6 uf, 1000v MKP (Mcap)

cheers!


...can't seem to post in 'technical' for some reason?

[Ali Tait]

What is it going in and what does it do?

[the_doc735]

What is it going in and what does it do?

it's going in a Cary 100t DAC, on an output board

Cheers!

[Ali Tait]

Yes should be fine.

[the_doc735]

Yes should be fine.

many thanks!

[the_doc735]

capacitor question?

Can I swap a: 3.9 uf, 250v MKP (MONACOR)

P1070254.jpg

For a: 5.6 uf, 450v (Mcap)

http://www.hificollective.co.uk/comp...p_evo_oil.html

cheers!

[JimC]

Better............................

http://www.ebay.co.uk/itm/Mundorf-MC...cAAOxydgZTJXt7

[the_doc735]

there £90 each!

[Light Dependant Resistor]

Hi Paul

As the Cary is a valve output stage, there are a few cautions changing capacitors
this is because there is lots of DC voltage typically 300v on typically the anode of the valve

You should turn the DAC off for at least 12 hours, by unplugging it, to allow voltage to dissipate and be very good at
soldering and electronics, as what you are embarking upon is not a beginners project. If you have experience
then follow safety precautions with high voltage emphasis.

You would also be invalidating your warranty

At the very least IMO write to Cary asking for their advice. If they are plugging into
what audiophiles want - they may well consider the alternative capacitor in their production.

The net effect will be to load the valve and earlier circuitry slightly differently- which may or
may not be within the valves specifications. It may for instance add small distortion
that the other capacitor did not exhibit, arising from extra current being required.
From my understanding a change to the cathode side may also become evident

Overall you can be pretty sure Cary has measured every facet to extract both the best audio
and the longest reliability. But possibly you may reap a benefit they have not discovered which
my understanding will be in the ESR rating of the capacitor being much higher.

A great read on most audio topics is here with great detail on valve stages: http://education.lenardaudio.com/

Hope this helps.

Cheers / Chris

[the_doc735]

Hi Paul

As the Cary is a valve output stage, there are a few cautions changing capacitors
this is because there is lots of DC voltage typically 300v on typically the anode of the valve

You should turn the DAC off for at least 12 hours, by unplugging it, to allow voltage to dissipate and be very good at
soldering and electronics, as what you are embarking upon is not a beginners project. If you have experience
then follow safety precautions with high voltage emphasis.

You would also be invalidating your warranty

At the very least IMO write to Cary asking for their advice. If they are plugging into
what audiophiles want - they may well consider the alternative capacitor in their production.

The net effect will be to load the valve and earlier circuitry slightly differently- which may or
may not be within the valves specifications. It may for instance add small distortion
that the other capacitor did not exhibit, arising from extra current being required.
From my understanding a change to the cathode side may also become evident

Overall you can be pretty sure Cary has measured every facet to extract both the best audio
and the longest reliability. But possibly you may reap a benefit they have not discovered which
my understanding will be in the ESR rating of the capacitor being much higher.

A great read on most audio topics is here with great detail on valve stages: http://education.lenardaudio.com/

Hope this helps.

Cheers / Chris

Thank you for your help, much appreciated!

Output capacitors will be upgraded to Oil capacitors (with larger uF as suggested by Cary themselves - better bass).

I have been soldering for about 44 years with 'parrot fashion' guidance, in computers, amps, TV's etc.

I was going to ask about polarity, there are no + - signs on the caps?

Also, how to discharge any voltage/current in the DAC, BEFORE doing anything!!

This DAC has had several output caps in its history, Panasonic, Modwright, Monacor, Dynamicap, etc. as well as several makes of valve!! LOL.