Actually, from what I understand there is no power conditioning board. A regular Thunderbolt has two boards. A processing board and a power conditioning board stacked on top of each other. The power condition board is whole bunch more that just a DC-DC converter. These 1/2 Thunderbolts need alot of external conditioning. You cannot just hookup a switching power supply from Lamda or whatever. You need to spend alot of time and money to get these boards powered up with clean, stable power. That's just the power. I don't even want to think about other issues this things might have. A standard Thunderbolt is worth much more than one of these. I wouldn't think of buying one of these unless I was willing to spend a long time (and money) building the power supplies. Remember it's got to be stable as well as clean-- a couple of hijacked computer power adapters ain't gonna cut it.
-Flavio ----- Original Message ----- From: "Jason Rabel" <[EMAIL PROTECTED]> To: "'Discussion of precise time and frequency measurement'" <[email protected]> Sent: Saturday, March 03, 2007 22:28 Subject: Re: [time-nuts] Thunderbolt > TVB bought one of the units off eBay and was going to report in once he > got > a chance to test it out. > > I think we have decided to put the purchase 'on-hold' until the seller > decides to drop the price significantly. > > The biggest issue seems to be the missing DC-DC converter board, which > provides a lot of line filtering and power stability for the rest of the > unit. Without it the asking price is too high considering we are the main > market demand, the unknown condition of the units, and most people seem to > just want one to 'tinker' with. > > I just looked on eBay, and the seller has 20 units with zero purchases. He > is including a DC-DC unit, but it appears to be for powering more than > just > the thunderbolt as the amp ratings are very high and the box is like twice > the size of the thunderbolt (not exactly compact). > > If I'm stepping out of line, please someone speak up and feel free to > smack > me upside the head. > > Jason > > >> Is the group purchase of the thunderbolt GPSDO still in the works? >> >>WA4DFS Ed > > > _______________________________________________ > time-nuts mailing list > [email protected] > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
