Hi All,
I went with alsalaser on ebay for my first tube. His ebay ad said it was a 70W tube and power supply. I received the system and measured the output power with a calibrated power meter. The output was 60W. There was also mechanical damage to the power supply, missing components (HV lead and documentation), and generally a bad experience. Alsalaser would not refund any money or accept a return. I finally had to appeal to ebay and got my money back.
After that debacle, I decided not to mess around any more. I didn't have time for that.
I purchased a 60W tube and power supply from Full Spectrum and haven't looked back. Henry's company is just the shnizzle (that's a good thing to our across-the-pond friends)! Good support, excellent equipment, and it works when you turn it on. I measured his 60W tube and it measured 60.2W. I know that I could have kept the original tube and supply from alsalaser, and had the same power. BUT - I don't like being lied to and having extremely poor customer service. Full Spectrum also has their RetinaEngrave board that I purchased too.
Everything works as it is described in their documentation. Just hook it up and it goes.
In my opinion, anyone that wants to build (or buy) a laser engraver/cutter should get their equipment from Henry at Full Spectrum.
Yes, you might spend a little more, but what is the value of equipment you can depend on and a company that will support you?
Disclaimer: Henry didn't talk to me about this, but I have their equipment. YMMV, AFAIK, PhD, DoT, Esq., etc...
HAND & HDBHA (Have A Nice Day & Happy Days Be Here Again)
Tim