I have the chance to bid on a couple of ECP4500Plus's tomorrow at an auction. I am familiar with the 4500 (have one hanging from the ceiling) but don't know what is different about the Plus version. Anyone know? Thanks.
Prejectorspecs.com list them as the same. Extron's catalog (albeit an older one) doesn't list a 4500 plus...only the 4500. However, it has a 4100 and a 4100P43. It also has a 4101 and a 4101P43. Assuming the P is for "plus" the only thing additional is a 9 pin ttl input. Everything else specs the same.
The sales sheet I have for the 4501plus lists the brightness at 1005 lumes @ 10% white and the 4501 non plus is 725 lumens (10% peak white). As I remeber this was done by a change in the sony tubes that they put into the plus. I can email you a pdf of the sales sheet if you like.
Just for the heck of it I looked it up and other ECP's that have the plus designation resulted in a increased scaning rate. The 2500 scans to 50 KHz, add the plus and it goes to 54 KHz. The 3500 scans to 62 KHz add the plus and it goes to 72 KHz (puts it in the graphics catagory). However the 4500 scans to 90 KHz add the plus and it is still at 90 KHz, so there may be something to the additional lumens output.
I checked out Eric Lang's site (he now also has Electrohome specs) and all the specs are the same except the price. BTW, the tubes are listed as 07MS and the lumens at 725. So what did you get for the extra $1,000 in the list price?
Pretty wierd. I got one 4100 and three 4500+'s. The 4100 has 07MS tubes. No prob (and they look "minty fresh" as Curt would say).
Two of the 4500+'s have 07MS tubes, which I didn't expect.
One of the 4500+'s has 07MTS tubes. The only thing that I can tell that's different from any other ECP I've seen (besides the 07MTS tubes, never seen those) is the yokes. I'll have to take a picture of it and post it. There's a lot more wire wound up into a much larger coil for the convergence yoke. Pretty neat.
This is a *third* type of yoke. It's different than the older SD187-type yokes. It looks like the newer yokes (small gap between deflection and convergence) but the convergence coil is way oversized compared to the others. I'll take a pic this weekend and post it. It's pretty odd looking.
That sounds different than mine. Mine has a much larger "ring" that goes against the back of the CRT...maybe 5" instead of the normal 3-3.5. This does cause the deflection yoke to become wider and flatten out some, but the convergence yoke is the same. I got this yoke on an extra Sd187 tube I bought...but the two yokes are bonded togethter from teh factory indicating that it was an 07 yoke? It doesn't look dranstically different, other than that forward most piece of plastic. I haven't held it side by side even though I told Mike I would and take a pic. I'm insterested to see what your looks like.
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