Caiman passive output mod revealed

[MartinT]

That'll work fine, Tony. Most polys and films don't have polarity to worry about.

[HighFidelityGuy]

If you want to try MMK's then you can get them HERE in the value that Martin recommended. They come in a pack of ten.

[LittleTone]

Thanks a lot,

Have ordered some.

Would you please tell me what 0.22uf would be in nanofarods ?

Local TV repair shop gave me two of these. Can you recognise them and are they worth trying.

Tony

[Reid Malenfant]

.Would you please tell me what 0.22uf would be in nanofarods ?

220 nanofarads or 220nf

The pic you have there is of a 2.2uf or microfarad capacitor, which would be the same as 2200nf.

[LittleTone]

Thanks for helping out the novice; learning all the time but still need a bit of reassurance.
So to bypass a 2.2uf Cap; I should try a 22nf ?
Regarding the cap in the pic; I've been trying to identify it on the net and find any spec about it. Is it a film cap. Is it likely to be better than a modern lytic.

Do you think it's safe to try. I don't want to any damage to the DAC or Amp.


Tony

[Reid Malenfant]

Sorry Tony i haven't been keeping up with what you are planning to do. Looks like you have either a polyester or polypropylene capacitor there, yes, as you point out it's a film capacitor

If you are planning on doing the passive output mod on the caiman then yes they'll be fine & sound much better than 99.9% of electrolytics

Frankly i don't think you need to bypass it, if you were going to though i'd suggest a really high quality capacitor like a polystyrene or silvered mica. You are more likely to find polystyrene at 22nf or 2n2 (2.2nf) though.

[MartinT]

Local TV repair shop gave me two of these. Can you recognise them and are they worth trying.

Tony, since they are 2.2uF in value I suggest you try them on their own - they look like good polys. Unless you have a preamp with a low impedance input, you should be ok for bass and they might sound good, you never know.

[LittleTone]

At the moment I,m running the passive mod with 10uf Nichicon FG,s. These were the best I could find quickly at Maplins. In an article I read today the new Rega DAC is using Nichicon FG bypassed with MMK,s. I thought if it's good enough for the Rega I'd try the same.
I also ordered some Nichicon Muse ES which an article suggested they worked well with Sonicap 0.22uf bypass. Hence that enquiry.
The caps in the pic were given to me by my local TV repair man. I just wasn't sure about them. Although they look unused I feel they probably quite old and was concerned about damaging Amp/DAC

Thanks to all that have helped me out
Tony

PS amp is 47Kohm. DAC is Standard 7520

[MartinT]

It's very unlikely that that type of cap would go leaky and cause damage. 2.2uF into 47k would be fine.

[Reid Malenfant]

It's very unlikely that that type of cap would go leaky and cause damage. 2.2uF into 47k would be fine.

Seconded, there is nothing to leak as no electrolyte

You may get a bit of phase shift in the extreme lower bass, but you'll still get a full 20Hz - 20KHz response.