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Old 6th June 2012, 10:46 AM   #1
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Default Summing Amp Transformers

Hi all, this is my first post on the forum!

I was wondering if anybody had suggestions for input/output transformers for a summing amp? I'm doing up a SM-Pro Audio summing amp I got 2nd hand, and am willing to change just about any part of it.

I don't mind spending a fair bit on the Output transformers, thinking maybe Carnhill CA-18-VTB1148, but I'd like to keep the input transformer cost down, seeing as I'll need 8 of them! I've heard Edcor transformers are pretty good for the money, and commonly used in mods, wondering if anybody could recommend one?

Thanks in advance!

Scott
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Old 6th June 2012, 12:39 PM   #2
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Sorry, what is a summing amp?
What does it do?
Not familiar with the term...

and, anyhow, what is wrong with the transformers in the unit now?

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Old 6th June 2012, 01:15 PM   #3
gk7 is offline gk7
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Quote:
Originally Posted by bear View Post
Sorry, what is a summing amp?
An example:
Tube Tech / SSA 2B Stereo summing amplifier
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Old 6th June 2012, 01:24 PM   #4
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Default PM8 Summing Amp

That's the type. The one i've got a hold of is a much cheaper version, SM Pro Audio ? PM8 ?

Scott
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Old 8th June 2012, 11:13 PM   #5
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Hi. I am also New to this Board but just ordered a Lawo DV975 summing Card with Haufe transformers. Don't take it too serious what i suggest as i am also new to the DIY hobby, but maybe it helps for your research.
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Old 10th June 2012, 05:19 PM   #6
AndrewT is offline AndrewT  Scotland
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I had a look at the SSA 2B link.
I think they are selling a normal two channel amplifier with a summing/mixer circuit on the input/s.
i.e. an inverting channel with 5 input resistors to link up 5 sources.
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Old 11th June 2012, 02:18 PM   #7
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Default Summing Amp Transformers

Thanks for that reply Holger1975, looks interesting.

Any other suggestions?

Cheers,
Scott
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Old 18th June 2012, 05:00 PM   #8
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Any other suggestions? All suggestions (type, brand, etc.) would be greatly appreciated!
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