Big iron! What are the reasonable permutations for using one of these in an amplifier?
+/-31.2 VAC (+/-39 VDC) for 2, 3, or 4 channels
+/-62.4 VAC (+/-78 VDC) for 2 channels
+31.2 VAC (+39 VDC) for 4/6/8 channels
-31.2 VAC (-39 VDC) for 4/6/8 channels
+62.4 VAC (+78 VDC) for 2/3/4 channels
-62.4 VAC (-78 VDC) for 2/3/4 channels
+/-31.2 VAC (+/-39 VDC) for 2, 3, or 4 channels
+/-62.4 VAC (+/-78 VDC) for 2 channels
+31.2 VAC (+39 VDC) for 4/6/8 channels
-31.2 VAC (-39 VDC) for 4/6/8 channels
+62.4 VAC (+78 VDC) for 2/3/4 channels
-62.4 VAC (-78 VDC) for 2/3/4 channels
Yeah, lots of options!
I found six of these so far. The image in the first post is of a different version of the same transformer. I posted it because it shows the secondary info. There is only the part number on the label of the six I have, but I pulled them myself so I know they are genuine.
I found six of these so far. The image in the first post is of a different version of the same transformer. I posted it because it shows the secondary info. There is only the part number on the label of the six I have, but I pulled them myself so I know they are genuine.
Nice project and some additional information about the Crestron CNAMPX-16x60
https://peterharris.dev/posts/crestron-cnampx-16X60
https://peterharris.dev/posts/crestron-cnampx-16X60
Would likely make a great transformer for a New Stasis front end amplifier. the 8 deep boards specifically in a 5U chassis. Could do dual mono'ish with two separate CRC banks with their individual grounds.
For the tube guys, these would be nice for an Atmasphere style OTL with some creative series/parallel arrangement of the secondaries if you run a separate filament supply!
Yes! By combining the secondaries in various ways there are many ways to use these transformers. I still have a couple more inside another two CNAMPX-16x60s that I have not taken apart yet, so I would really like to find these new homes.
Here is a deal to sweeten the pot a bit: buy more than one at the same time each subsequent unit cost 25% less than the previous one!
So that is:
You are not going to get your hands on over 1kVA of iorn any cheaper than that! Unfortunately the shipping for each remains the same at $17.
Here is a deal to sweeten the pot a bit: buy more than one at the same time each subsequent unit cost 25% less than the previous one!
So that is:
first one: $40
second one $30
third one: $22.50
fourth one: $16.87
fifth one: $12.65
sixth one: $9.50
You are not going to get your hands on over 1kVA of iorn any cheaper than that! Unfortunately the shipping for each remains the same at $17.
Last edited:
I am keeping the amp modules to use as dedicated amplification for active speaker projects or to build into new configurations that need less than 16 channels. In the not too distant future I will be moving overseas where mains are 230VAC and the transformers have only 120VAC primaries. I am trying to rehome them before I have to recycle them. I bought a bunch of Antek 300VA transformers with 32VAC secondaries and dual 115VAC primaries so I can run the amp modules single or in groups as needed, and on 120VAC or 230VAC
5 amps each 16ch, thats a lot of channels! Even if combined in differential setup you end up with 40 channels.
But yes, the single primary isn't convenient nowadays in the times of globalisation.
But yes, the single primary isn't convenient nowadays in the times of globalisation.
Hi Charlie!
These are very tempting for making a dual mono F5 turbo!
Can you give the approximate dimensions? Is any hardware included?
These are very tempting for making a dual mono F5 turbo!
Can you give the approximate dimensions? Is any hardware included?
The transformer dimensions are approximately 6.5" in diameter and 3" tall. Each comes with a thru-bolt and nut for mounting, metal plate, and two flat rubber gaskets about 5" in diameter.
