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Chip Amps Amplifiers based on integrated circuits

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Old 11th February 2003, 03:40 AM   #661
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Plitron is using plastic, black tape now, on some tranformers.
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Old 11th February 2003, 03:44 AM   #662
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And after a few months (less at elevated temperatures) does the goo start oozing off the tape and muck everything up? Whoever invented that tape (or more specifically, the adhesive on it) should by drawn and quartered...

MR
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Old 11th February 2003, 03:51 AM   #663
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This is just plastic tape, no adhesive. Exactly the same as the clear one they used before, just different color.
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Old 11th February 2003, 03:52 AM   #664
JoeBob is offline JoeBob  Canada
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I've got some black torroids I bought a while ago from them, I wanted them silver or white not that I'm racist or anything, I just liked the old colors ...
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Old 11th February 2003, 04:58 AM   #665
JDeV is offline JDeV  South Africa
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Quote:
Originally posted by Stabist


Well - my experience with samples - I've sent a message with order for 4 LM3875

That's what I've got as a reply today:

"Dear Primoz,

Thank you for the sample request from National Semiconductor.

We regret that we are unable to fulfill the sample request as follow:

Part Number : LM3875T for 4 pieces.
Company Name: Primoz.
Application : Consumer.

Please contact your local distributor to obtain sample:
http://www.national.com/contacts/

Regards,

Regional Administrator"

Hmm

The thing is - all others from our Country - that got same message - couldn't get samples - 'cause local distributor isn't prepare to send them ...

So ... I'll guess I'll have to find another way to get them ...

Hi Stabist
I had exactly same experience here in South Africa, several times, so I had no other choice to order from RS. Their price here is about EUR9.40 for the LM3875. Yesterday I tried again to get 4 of these samples from National and 1Hr. later I got e-mail to say my order was on it's way So try again, maybe you are also lucky
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Old 11th February 2003, 06:45 AM   #666
argo is offline argo  Estonia
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Quote:
Originally posted by Bobken

....
For anyone else who is serious about obtaining the best sound in their system, I would strongly recommend that they substitute something else (like MCBs) for any RCDs in the mains supplies to their equipment, and I don't believe that anyone doing this will regret it!
....

Regards,

What is MCB? Or RCD?
http://www.google.com/search?hl=en&i...=Google+Search


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Old 11th February 2003, 06:58 AM   #667
JDeV is offline JDeV  South Africa
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Quote:
Originally posted by argo



What is MCB? Or RCD?
http://www.google.com/search?hl=en&i...=Google+Search


argo

These are electrical mains safety devices:

MCB
Minature Circuit Breaker. Up to 63A (UK).

RCD
Residual Current Device. Protects the user against short circuit (earth faults) and earth leakage caused by damaged cable or faulty equipment. A RCBO is a combined MCB and RCD, protecting against earth leakage/short circuit and overload. Known as a GFI (Ground Fault Interruptor) in the USA.

How they can improve sound, I don't know.
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Old 11th February 2003, 07:07 AM   #668
Hamish is offline Hamish  Australia
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i'm thinking of building a "monster clone" using the bpa-200 application notes, but i want to try running them all in inverting mode. could i just use a buffer to change the phase on half of them? will this cause any other problems?

i have built two gainclones already, and the inverting option wins hands down, IMO. anybody tried the bpa-200 schematic with the lm-3875?
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Old 11th February 2003, 08:20 AM   #669
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Thumbs up goin' balanced...

try to use a drv-134 from TI.....?
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Old 11th February 2003, 08:28 AM   #670
Hamish is offline Hamish  Australia
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i'm not sure i understand. convert it to balanced first, and then reverse the phase for the positive side? sorry, i haven't had anything to do with balanced circuits, so any help here is appreciated. sounds interesting though.
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