Paul C. Buff, Inc. Technical Forum

I had a similar experience once. I believe I had a TTL cord on my Canon 7D's hot shoe with a Speedlite on a flash bracket. My TTL cord has a pass-through feature with a hot shoe on top of the part that connects to the camera's hot shoe. I tried to put the Cyber Commander on there and just like you said, my PCB lights (Einsteins) began discharging rapidly and repeatedly - flickering.

If I want to mix the two, I actually put a Phottix Strato radio trigger on the pass-through shoe and put the CST on the Phottix receiver. It's a little complicated but it works. If you have a spare PW receiver you could always hook it up to the CST.

I might be able to come by in the next few days... do I need to call and give you a heads up? I live about 15 minutes away.

Joe

Not typically, but it can help ensure I am not on the phone.

I'm wondering if this is related to problems that I had this weekend. I have the MiniTT1, AC3, and 2 FlexTT5 that I use with a SB800 and SB900. Just this week I bought 2 Einsteins and MC2's so I could use all 4 lights together. I had a variety of problems. I experience the rapid triggering thing once, all by itself. I had black screens on some shots even though the lights fired. This seemed to happen when I would turn on zone off on the AC3. I had lights triggering randomly throughout the day. I'm probably forgetting some stuff, but there seemed to be a lot of bugs. Since I had just bought the e640's and MC2's I thought that they may need a firmware update but I checked later and everything was current. I had updated the other PW items to the latest firmware.

Andy,
Were the slave eyes off on the Einsteins? If not, I can see that causing every problem you describe, particularly if you were around other photographers.

Yep, they were on and I agree that was probably my problem. I tried it again last night and everything seemed to work as it should, except for high speed sync. I thought that r read tha the einstiens would support hss with the new PW system. Is that wrong?

Not HSS, but HyperSync. A big difference. Here is a link to a sticky about the differences:
viewtopic.php?f=8&t=67

There are also several other threads that can be searched for that discuss this feature.

Hypersync is what I meant. So the einstiens support hypersync with the new PW system? When I went above about 1/200 all I got was black screens.