Are you talking about the TAPR/JAMSAT TrakBox?
I bought a nice one a couple years ago for about $200 USD shipped from Canada. I found a turbo kit available from someone here on AMSAT to speed up the CPU and installed it. The turbo kit if still available is a bargain, new CPU, Y2K firmware, a faster crystal and another faster chip. Apart from soldering the crystal, there is not much to do but follow instructions.
I also plan to install a back-lighted LCD display to be easy on my eyes.
They work pretty well. The only drawback is the RS232 interface for the KEPS. I am going to try and add an Ethernet to RS232 adapter so I can use a browser to upload the KEPS.
What I like is that it has real time tracking, _doppler __correction _and autonomous operation in one package. I don't think there is anything on the market that has everything these have.
Assuming the lithium battery has not leaked and the kit is well constructed, you should be able to recoup your investment. They are no longer available.
Joe K4SAT
Hi Gang
I'll be selling a Trakbox soon; would be grateful for advice on what price to ask (in UK money). Original price AFAIRC 100-150 UK pounds.
For those who don't know this item, its an az/el rotator controller. Feed it keplers on the RS232 input occasionally and it'll track both rotators at the right time.
73 Richard G3