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Old 29th October 2008, 03:45 PM   #31
wheezer is offline wheezer  United States
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We know what it's for, thanks.
The question was if the schematic exists?
Do you have it?
Tx,
Mitch
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Old 29th October 2008, 07:25 PM   #32
sreten is online now sreten  United Kingdom
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Quote:
Originally posted by wheezer

We know what it's for, thanks.
The question was if the schematic exists?
Do you have it?
Tx,
Mitch
Hmmm........

Some sarcasm ?

You want a schematic for a series capacitor
with switchable parallel resistors on the output ?

You cannot work out the wiring or the values ?

/sreten.
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Old 29th October 2008, 07:47 PM   #33
wheezer is offline wheezer  United States
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Indeed.
You didn't answer the guys question and
added to what we already know.
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Old 29th October 2008, 08:40 PM   #34
sreten is online now sreten  United Kingdom
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Quote:
Originally posted by wheezer

Indeed.
You didn't answer the guys question
and added to what we already know.
Well I'll let you work the bit you do not already know, it is simple.

/sreten.
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Old 29th October 2008, 10:07 PM   #35
wheezer is offline wheezer  United States
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You got it... and sorry for the misunderstanding.
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Old 15th November 2008, 12:31 AM   #36
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Agreed: The concept for a 1st order crossover is as simple as it gets. What Vandersteen is doing here with the parallel resistors to adjust the impedance to maintain the proper crossover frequency is also clear.

However, wheezer's pictures shows a bunch of capacitors (2 infinicaps and a few wimas?) with the biasing battery.

Call me a dummy, but how does the the biasing battery connect to the capacitors?
Why have the extra wimas? Is it to provide a greater capacitance range? If so why not use all infinicaps?
Is the battey just biasing the infinicaps or all the caps?
How would one go about calculating the proper biasing voltage?

Let me apologize right off the bat for my inexperience. I am interested in this 1st order crossover, but my electronic/audio skills are basic as best.

Thanks in advance,
fteixeira
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Old 23rd December 2008, 12:31 PM   #37
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Default Possible schematic found

After some searching, I found this link. A schematic is given which looks very much like the circuit in the M5-HP. Look at the circuit shown in item 5.

See http://www.thlaudio.com/wondrInfinCapmnl.htm

wheezer: can you confirm that this is the circuit used? Hopefully, you can pull the PCB out and trace the circuit. Obviously, there are the addition dip switches to set the cross-over frequency.

Happy holidays and a prosperous New Year!
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Old 23rd December 2008, 03:31 PM   #38
wheezer is offline wheezer  United States
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Sorry :-(
It's not the HP5 Vandy x-over.
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Old 30th May 2011, 12:31 AM   #39
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wheezer, did you ever get an answer here? Or replace the caps with better ones?

I have the 5As now but without the inline filters*. If you prefer to keep the inline filters instead of adding a correct-value coupling cap at the input of your poweramps, I suggest you replace all the WIMAs and InfiniCaps with like values of better caps. Probably I'd use MultiCap RTXs ('styrenes) for the WIMAs and SoniCap Platinums for the InfiniCaps.



* I had already replaced the coupling caps in my poweramps to achieve an 85Hz filterpoint, and that works well with the 5As.
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Old 30th May 2011, 02:46 AM   #40
wheezer is offline wheezer  United States
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Howdy Jeffrey,

M5-HP Oh, I gotcha. No, I've not found any info, nor searched any further.
Yea, I've seen the pic's of the 5A's. Beauty's Jeff.
You've strayed from home?

Changing the amp's coupling caps changes the corner frequency of the amp AND at the OPT. This can do the nasty on the OPT.
I schlep my Tek. function gen. to the media room when auditioning an amp or changing front end tubes. I've got the process down pretty good. Using the CD's tone of 100Hz and 1KHz is a PITA.
Every time I think about changing the caps in the M5-HP, I get cold feet. I have no experience w/speaker caps (AC only). Then the real estate issue.
I do love the RTX though. They serve as couplers in my phono stage and RTE in the RIAA. I'm sure someday I'll get around to it.

Regards,
W.
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