[sdiy] OBXa cards uses either 15uf -or- 22uf caps ?!

[Tom Wiltshire]

I agree with Gordon. Here's why:

Assume that the circuits we're looking at have an input impedance of 100K. For a 15uF DC blocker, that gives a roll-off frequency of 0.11Hz. For a 22uF, it's 0.07Hz.

So no, you won't hear a difference. Even if the input impedance were an order of magnitude worse than our assumption, it still wouldn't matter.

 
On 30 Mar 2016, at 12:11, Gordonjcp <gordonjcp at gjcp.net> wrote:

> On Wed, Mar 30, 2016 at 10:57:04AM +0000, Gil W. wrote:
>> I see,
>> 
>> So basically the 22uf cards should have a little bit more of low end ?
>> 
> 
> 22μF is a "normal" size and 15μF is a "funny" size.  Although the E6 series goes 10, 15, 22, 33, 47, 68 it seems that multiples of 10, 22 and 47 are way way more common than the others.
> 
> I doubt you'd ever hear a difference in a practical circuit.
> 
>> I see 6 of them are 22uf while only 2 are 15uf. Should I just recap the 15uf to an "all 22uf" to match the other 6 ?
> 
> If it works, leave it alone.
> 
>> Or could it be that the rest components on the 15uf cards are different than the ones of the 22uf ?
>> 
>> I want to go for a full recap, they all look very old...
> 
> If it works, leave it alone.
> 
> -- 
> Gordonjcp MM0YEQ
> 
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