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Antonio J. wrote:

Regarding the C2 thing, He said that I misunderstood his proposal, what he says is using five double 200uF+200uF cans (400 uF each cap), which are rated for 500V (not 200 as I misunderstood) to get the 2000uF needed for C2, but having lower ESR and ESL than using a single 2000uF/450 or 500V cap. I'll do whatever you advice, using smaller caps paralleled to get a certain value has some advantages compared to using a single one, but this might have other advantages that you'll probably know better. He says the cost of a single big cap is higher than using his solution, but again he'll do what I (you) say. The same goes for C10, he would use three 200+200 (400uF/500V) to get the 1200uF/450V needed.

Sure, if the 500V rated then he can do whatever he wants.  What is important for sound in this chain is do not have C1 larger then 100uF.  The amount of C2 I feel still be too little with 400uF but he can measure the ripples and add the values accordingly if it necessary and if the noise will be the issues. 

Antonio J. wrote:

I think we'd need some supplier to find the VR1 trimmer and some of the other resistors. As I said, he can use some low inductance ones instead of the Vishays to keep the budget low, but he can't find all the values, being the most difficult the trimmer.

Di not over abuse yourself with the VR1, it is also not really critical, put a chap trimmer in there. You always after you make the amsl will be able to replace it.

Antonio J. wrote:

Regarding the delay timer, he says that using the Magnecraft pre-built timer is overkill at 120 USD and he can design and build an equally suitable circuit for way less money. I suppose he's skilled to do that.

Sure, if he wishes to design and to build the 12A/220V time delay circuit with heavy-duty dual silver sealed contacts, with led indication (very comfortable to use those LEDs externally), unlimited time adjustability, play and play applicability, protection circuit, with no sonic influence (tested!!!)… and addition all of it for $35 then certainly let him do it.

http://www.goodsoundclub.com/pdf/Delay.pdf

BTW, if you wish to turn it on manually then you would not need any delays… It I were you then I would do it without delay to test that that I like how the amp sounds….

The Cat

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