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Hi all,
Let me explain you my problem, and sorry for my bad english gramma.
I live in Spain and I own the Joule Electra VZN-100 OTL monoblock amplifiers. However they are originally 110/120V units that I feed directly from a dedicated power line outlet through a 220-110V autoformer. It is a 2000W autoformer, a Seven Star (TC-2000M model).
My incoming power fluctuates fastly in few minutes several volts up and down, so I cannot keep the Joules in his ideal working voltage values both for the same amps and for the bias setting of each power tube.
As a result, and looking for a power conditioner or voltage regulator that could fix this problem, I have got interested in the PS audio power plant premier. I really need to know if that product would be really the perfect solution to my problem. But, here is the question : Does it would be better to use a 220/240V unit BEFORE the 220-110V autoformer or a 110/120V unit to use AFTER the 220-110V autoformer and then plug there my Joule amps?. I really don't know but I think in the first case I could have more problems since the PPP can only feed until 1500W in requirement power, and the VZN-100 amps are 800W (400W each one) but in this case there is te 2000W autoformer in the middle so I think the PPP could not be enough. Let me know if I'm correct in this assumption.
I have seen that the older units like the P600 or the P1000 could be feeded with 220V input and provide a 110V output voltage. That would be really the ideal solution for my case since I could even forget about the 220-110V autoformer I'm using right now. It's a pity the PPP does not allows to do it.
Thanks in advance for your advice and help.
Pep
Why not talk to Jud about converting your Joules from 110V to 210V for EU voltages?
The fact that the auto former CAN handle 2000 watts doesn't really matter. It all depends on what it is actually doing, which is probably not that high at all.
I would suggest after the auto former is best. This is because the PPP can then make up for the problems of the auto former like a distorted waveform.
Thanks for your answer, Paul.So you are suggesting me to use a 120V PPP unit after the autoformer. I understand the reason you explain me to proceed in that way, there is no doubt that sonically it should be the best solution.
However I have been informed that using the 220 volt version before the autoformer puts less stress on the power conditioner because the current runs double if you cut the voltage in half. Let me know if this is correct.The main question here is that I have the doubt of if a single PSaudio PPP would be enough to feed without any demanding current limitation to my Joules VZN-100 OTL's, and not noticing the dynamic losses and other sonic problems many people talks about when using the PPP to feed some hungry amplifiers. I have not known by now of any other person using this combo, I only know of one person who uses VZN-160 OTL's and he is using two PPP to feed them (one for each monoblock). And these amps are 500W of power requirement each monoblock, since my VZN-100's are 400W each. So I wonder if I would also need two.
Please, let me know what you think about this.
Pep
Edits: 05/19/09
So, indeed, the current is half when the voltage is double but this means the power is the same - so no, it is not easier on anything. better after the transformer and one PPP is not enough - you would need two.
Thanks Paul,
Then, since I'm only using a single variac to feed both monoblocks, I guess I should speak with Jud Barber to get another one, and have a variac for each monoblock, and each variac plugged to his own PPP. I guess to have two PPP's feeding a single variac is not possible.
I wonder if I should also take a look at the ExactPower EP-15A option, that some people say it's a better option for hungry current amps.
Pep
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