Need an opinion on SPDI/F transformer from C & D TECHNOLOGIES

Vadim · 17th August 2005, 07:11 PM

I am building three SPDI/F outputs in my Sony N975 DVD player. I found this transformer that seems to fit the bill, but I have no direct experience with the company that makes them. The company is C & D TECHNOLOGIES and the transformer part number is DA101M/R. Here is the link

http://www.cd4power.com/data/power/ncl/nmp_da100_4.pdf

How good is this device for SPDI/F application?

Thanks

Jocko Homo · 17th August 2005, 08:54 PM

1.) The link does not work.

2.) Has low leakage inductance, might be ok. Good return loss, but only spec'ed to 3 MHz. Other than that, I would have to have one to know for sure.

3.) No one has them in stock, so it is a moot point.

Try buying some of the ones Digi-key carries.

Jocko

Vadim · 17th August 2005, 10:14 PM

Jocko,

Thanks for the reply. I am sorry about the link, I think this one should work

http://www.cd4power.com/data/power/ncl/nmp_da100_4.pdf

Newark does have stock, here is the link

http://canada.newark.com/NewarkWebCo...KU=39C2812&N=0

I think I will go ahead and get those transformers. THey are a lot cheaper by a factor of nearly 10, then the Newava line at Digi-key.

What do you think of Pomona BNC plugs like this one

http://www.pomonaelectronics.com/pdf...91595_6741.pdf

Thanks, Joko.

Jocko Homo · 18th August 2005, 03:20 AM

You are trying to tell me that they are only $1 at Newark??? Nothing is inexpensive at Newark. They don't even give a price, and I doubt they are that cheap there.

Howcum they don't show up as being in stock anywhere on C&D's site?

Pomona makes decent parts. I get mine from Trompeter.

Jocko

peranders · 18th August 2005, 02:08 PM

1.67 dollar, is that possible?

Vadim · 18th August 2005, 03:45 PM

Quote:

Originally posted by peranders
1.67 dollar, is that possible?

Well gentlemen,

Yes, it is hard to believe, but they are only $1.67! In fact I found prices at Newark to be quite reasonable.

Anyway, since we are on the topic of transformers, - what do I do if I want to connect a 75 Ohm source from RCA jack to a 110 Ohm target on XLR jack? Do I simply get me a 75-110 Ohm transformer? Of yes, then which one? Or, should I built a circuit that will do the same thing with logic gates? I think the voltage level of the SPDI/F from my source is high enough for the 110 Ohm target.

Right now I am simply using a RCA to XLR cable with pins 1 and 3 connected together and hooked to the shield on the XLR side and it works, but I know it is not a right thing to do.

Thanks

Jocko Homo · 18th August 2005, 04:21 PM

$1.67?? Can't be that good for that price.

Get rid of the XLRs. The only thing worse than RCAs. Convert it to 75 ohm balanced.

And, no............do not try a 75:110 transfomer. They are all horrible. Despite what the guys who sell them say.

Jocko

17th August 2005, 07:11 PM	#1
Vadim diyAudio Member Join Date: Jun 2003 Location: Toronto	Need an opinion on SPDI/F transformer from C & D TECHNOLOGIES I am building three SPDI/F outputs in my Sony N975 DVD player. I found this transformer that seems to fit the bill, but I have no direct experience with the company that makes them. The company is C & D TECHNOLOGIES and the transformer part number is DA101M/R. Here is the link http://www.cd4power.com/data/power/ncl/nmp_da100_4.pdf How good is this device for SPDI/F application? Thanks

18th August 2005, 02:08 PM	#5
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	1.67 dollar, is that possible? __________________ /Per-Anders (my first name) or P-A as my friends call me

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17th August 2005, 08:54 PM	#2
Jocko Homo Banned Join Date: Feb 2002 Location: As far from the NOSsers as possible	1.) The link does not work. 2.) Has low leakage inductance, might be ok. Good return loss, but only spec'ed to 3 MHz. Other than that, I would have to have one to know for sure. 3.) No one has them in stock, so it is a moot point. Try buying some of the ones Digi-key carries. Jocko

17th August 2005, 10:14 PM	#3
Vadim diyAudio Member Join Date: Jun 2003 Location: Toronto	Jocko, Thanks for the reply. I am sorry about the link, I think this one should work http://www.cd4power.com/data/power/ncl/nmp_da100_4.pdf Newark does have stock, here is the link http://canada.newark.com/NewarkWebCo...KU=39C2812&N=0 I think I will go ahead and get those transformers. THey are a lot cheaper by a factor of nearly 10, then the Newava line at Digi-key. What do you think of Pomona BNC plugs like this one http://www.pomonaelectronics.com/pdf...91595_6741.pdf Thanks, Joko.

18th August 2005, 03:20 AM	#4
Jocko Homo Banned Join Date: Feb 2002 Location: As far from the NOSsers as possible	You are trying to tell me that they are only $1 at Newark??? Nothing is inexpensive at Newark. They don't even give a price, and I doubt they are that cheap there. Howcum they don't show up as being in stock anywhere on C&D's site? Pomona makes decent parts. I get mine from Trompeter. Jocko

18th August 2005, 04:21 PM	#7
Jocko Homo Banned Join Date: Feb 2002 Location: As far from the NOSsers as possible	$1.67?? Can't be that good for that price. Get rid of the XLRs. The only thing worse than RCAs. Convert it to 75 ohm balanced. And, no............do not try a 75:110 transfomer. They are all horrible. Despite what the guys who sell them say. Jocko

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