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Roll Call: Who's building, built, or thinking of building a beta22? - Page 69

post #1021 of 2937
6/18/09 at 1:53pm
Anyone able to provide the full height of the shielded/encapsulated SumR tranny?
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post #1022 of 2937
6/18/09 at 2:17pm
Hi amb,

it suddenly occurred to me when I arrived at work today that the inputs might be reversed as the boards were constructed slightly differently regarding the input mounts, one above board and one below and in my foggy late night work session it never crossed my mind that hooking the connector in the same orientation on both boards would result in reversal on one. Amazing what obvious stuff a tired mind misses.

I won't be able to test until tonight when I get home but I think that is indeed the problem. If so I'll be ecstatic.

In answer to your questions, the hiss is volume dependent, if the volume is all the way up you can faintly hear the signal coming through almost like crosstalk. Swapping inputs made no difference as I was still plugging the thing in the wrong way (plug mates to socket one way) so again, me being an idiot and missing the blatantly obvious. I'll let you know


Quote:
Originally Posted by amb View Post
Try reversing the left and right cable hookups from your source. Does the problem stay on the same side or does it switch sides too? If the latter than the source or cable is the problem. If it stays on the same side, then inspect your wiring very carefully to make sure it's all correct.

Is the hiss affected by the volume control? Does it hiss when the volume is turned full-off?
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post #1023 of 2937
6/18/09 at 2:18pm
Quote:
Originally Posted by zare View Post
That is true, but by also depends if you are using 50Hz equipment on 60Hz line or the other way. 60Hz transformer on 50Hz line will make 17-20% V increase. In some cases that can make transformer cores saturated in the no load scenario. Well, I'll check the papers that came with the transformers and get that clarified.
Awesome

For the benefit of others watching this, my dilemma is that I am in Canada now so would ideally have a transformer for 115V at 60Hz. But I will want to take my gear back to Australia with me in a couple of years time, so will want these transformers to also run at 230V 50Hz.

It is my understanding that 2 x 115V primaries designed to run at 50Hz is the best semi-universal solution, without the transformer getting really huge and having a stupid number of taps on the primary. But for an investment like this, I want to get it right!
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post #1024 of 2937
6/18/09 at 10:20pm
Quote:
Originally Posted by Beefy View Post
Awesome

For the benefit of others watching this, my dilemma is that I am in Canada now so would ideally have a transformer for 115V at 60Hz. But I will want to take my gear back to Australia with me in a couple of years time, so will want these transformers to also run at 230V 50Hz.

It is my understanding that 2 x 115V primaries designed to run at 50Hz is the best semi-universal solution, without the transformer getting really huge and having a stupid number of taps on the primary. But for an investment like this, I want to get it right!
I don't know how much it would cost or if it's available, but can you get a single transformer that has multiple sets of wires coming out? ie you connect it to the boards for 115v here and switch it to 250v when you get down under.

I'm still not an electronics expert by any means, so maybe you can't do that with a transformer. From what I recall studying how they worked, it seems like you should be able to do it.
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post #1025 of 2937
6/18/09 at 10:35pm
Quote:
Originally Posted by Hayduke View Post
I don't know how much it would cost or if it's available, but can you get a single transformer that has multiple sets of wires coming out? ie you connect it to the boards for 115v here and switch it to 250v when you get down under.
Well yes, that is what the 2 x 115 primaries gives you. Connect them in parallel when you are on 115V supply, and in series when you are on 230V supply. This is pretty standard,

But frequency complicates things, and I don't completely understand it yet.
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post #1026 of 2937
6/18/09 at 11:57pm
Ok, finally we have a working Beta 22!!!

Thanks to everyone for their time, patience, generosity and knowledge, without all the help I received I would never have this working, and working gloriously I might add. Holy crap this is good.

Thank you all.
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post #1027 of 2937
6/19/09 at 12:00am
Quote:
Originally Posted by smeggy View Post
Ok, finally we have a working Beta 22!!!

Thanks to everyone for their time, patience, generosity and knowledge, without all the help I received I would never have this working, and working gloriously I might add. Holy crap this is good.

Thank you all.
Yay, Smeggy!
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post #1028 of 2937
6/19/09 at 12:09am
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post #1029 of 2937
6/19/09 at 12:14am
Congratulations Smeggy, you give hope that hopefully one day I'll build myself one of these beasts!

Pics, pics, pics!!!!!!!!!!!!!!
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post #1030 of 2937
6/19/09 at 12:15am
Gotta post pics buddy!
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post #1031 of 2937
6/19/09 at 12:17am
Quote:
Originally Posted by smeggy View Post
Ok, finally we have a working Beta 22!!!

Thanks to everyone for their time, patience, generosity and knowledge, without all the help I received I would never have this working, and working gloriously I might add. Holy crap this is good.

Thank you all.
Well done mate!
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post #1032 of 2937
6/19/09 at 12:22am
WTG Smeggy!
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post #1033 of 2937
6/19/09 at 12:26am
I still remember the first time I heard my beta 22. Such a revelation. Hoping I get the same kind of reaction when my balanced version is done!
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post #1034 of 2937
6/19/09 at 12:28am
smeggy,
congrats, you needed and deserved this after the problems you've had. well deserved.
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post #1035 of 2937
6/19/09 at 1:01am
awesome smeggy good job, and now you can rock those custom fostex with it

PLEASE post pics
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Head-Fi.org › Forums › Misc.-Category Forums › DIY (Do-It-Yourself) Discussions › Roll Call: Who's building, built, or thinking of building a beta22?