Surge suppressor for wired PWS.

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DanS:

Maybe it would be easier (and save time) for you to modify those suppressors you're using now.?.?.
Possibly swap out / add the components and add a ground? Kind of what I did to my UPS mounted phone protector circuit before I built this.  Just a thought Mark.

Mark / Ohio:

That is a thought.  I'm kind of curious as to what protection it has in there now.  If memory serves,  I'm thinking phone line voltage can go up to around 70V for the ringer?

DanS:

Yeah it's up there quite a bit higher than rs-232 (I think 80 to 90 VAC ring voltage) so the tele-protector won't do much down in the 12 volt or lower battery range. If your protector is one of the "economy" models like my UPS one was chances are the two outer lines (black/yellow) will pass through with no protection. It's only the two center ones (red/green) may have a couple of MOV's slapped on and a couple of 10 ohm resistors with them. End result, 2 out of the 4 data lines are almost protected when used as a data line protector. :roll:

wxtech:

Quote from: DanS on April 27, 2010, 07:59:40 AM
--
~~In my (extremely) broken Thai I was trying to explain what I was doing and needed to him when he looked at me and said, "yes we have varistors here, what size do you want?" His English was so good. Shocked me. I've been dealing with this guy for years and never knew we could speak to each other. :roll: Anyway he had everything I needed right there. It is fun, like you say.

--
When I was there, I took a course in Thai.  Then found out that most who dealt with Americans wanted to speak English.  They wanted to learn from us.  But they also wanted to teach me the basics of Thai. 
I just finished reading "The Wild Blue".  It's a book that I read in 1986.  It's good the second time around.  Some about the bases in Thailand and the people there.
I enjoyed Thailand and would return if possible.
I'm going to build your circuit into a telephone network j box from All electronics, 65 cents.  My house ground is just outside and next to the phone line entry.

DanS:

That is something I need to do also and the wife keeps reminding me of it, take some language courses in Thai. It sure would benefit me and the family here. Interesting language.
If you do ever get a chance to return for a visit, it would be nice to meet. I'm sure from what I've seen on here we'd have lot's to gab about. ;)

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