Scott's Transient Voltage Suppressor

Not a Scott's, but you can purchase the TVS diodes from Digi-Key. They are maybe 50-75 cents or so each. Here is a link to some information on what most folks around here are using: PTC & TVS Commonly Used Items. The Digi-Key part numbers are provided in the linked post.

The later version of the Scott's TVS-4 was fine, but the first versions uses a very small TVS device and also had oddball wiring that really didn't provide the proper protection.

I'd wire your own so you know how they're wired and the capacity of the devices. 

Can anyone either post a schematic or instructions on how to construct my own TVS?

bruce

It's not rocket science Bruce.  Just connect the TVS device across the track feeds from each transformer output, job done.   I recommend the Littlefuse 1.5KE36CA for this task, I buy them in quantity at Digikey from that link.  They're 65 cents in quantity one.

It's really not a device so much as a single component to put between common and hot, like a capacitor.  At over voltage, spikes are given a path to ground thru it, rather than through a board component.

I think we'd need a full description of Scotts TVS-4 to even make a wild stab at what it entails internally.

Does it have a failure detecting light? That would require more tan just a tvs (transient voltage suppressor. Wikipedia has a descriptive page on the. component. ( I can't change pages to link without text loss)

Did you read this thread?  TVS from Scott's.  Lots of information on the unit.  I recommend the individual TVS 1500W parts, IMO better protection.

To add one more thing to GRJ's post about connecting the TVS, the ones linked are bi-directional so it does not matter which way you connect them. Also the ones GRJ linked are the same as the ones in the 'Commonly Used' list. The info in the list probably came from GRJ to begin with.

For AC, the TVS has to be bi-directional if you want it to work!

Yes, that's quite true.   I was just thinking about seeing questions here from time to time about which way they should be connected.

While you are here, I can't get the link to work to the Scott's info. I was going to try a search here shortly. Thought it might be interesting to read. 

I found the Scott's article, but just as a FYI, the link is still not working.

I have found Scott's Odd & Ends to be very expensive for what they give you. You would do better with Digikey or Mouser Electronics even with shipping added in. When I bought my TVS units they were rated at 32 volts AC & bi-directional.

Lee Fritz