Well, the world's favorite search engine has several hits for a TrueTime XL-AK. There is a manual for the XL-AK 600 receiver. The PDF does not include the schematic. A down converter is listed as an option, to be mounted within a foot of the antenna. There is no discussion of the down converter beyond mounting it close to the antenna.
The manual says the unit was designed in 1994 and is capable of acquiring six satellites. If the receiver input is 4 MHz, it requires the down converter at the antenna. This allows use of inexpensive cable in 1994. I'd expect this receiver to be as useless as the TrueTime GOES receiver. Antenna and converter will be hard to find, as they were probably junked separately. I would not expect the receiver to be set up by changing some dip switches. Now, if someone had the RF skills to build a GHz to MHz converter, it might work. Bill Hawkins -----Original Message----- From: Tom Van Baak Sent: Thursday, April 30, 2015 11:51 AM I received this email. Anyone have a good answer? Thanks, /tvb ---------- Someone on ebay advised me to contact your website in hopes that someone in your organization can help me with my TrueTime model AL-AK GPS Receiver. I need to send it to someone so that they can check it to see if it works and can track Satellites. This receiver has the onboard up/down convertor board that changes the receiver input frequency which is set at 4.092 MHz. I don't have the needed down converter at the antenna. I bought this receiver on ebay from someone who told me that he doesn't have the down converter as well and can't figure out how to get it to work at 1575.42 MHz. He also didn't know if this receiver can be setup for a 1575.42 MHz by removing the onboard converter and changing some DIP switches. If one of your members can at least check out the receiver at 4.092 MHz for satellite tracking That would be a big help ... ---------- _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.