Recent content by mbmsv

I am now pretty sure that Yongnuo is quietly changing the design and that my units in fact do have SCRs in them and not the transistors. There is a confirmation to this in a detailed discussion of these receivers on a Russian language forum here: http://impulsite.flybb.ru/topic170.html. For...

Yours is marked differently compared to mine. If you want I can post a picture. Do you know what the exact part number is? 6V transistors are rare. I don't understand why anyone would put a 6V transistor in such a circuit... If I were to build it I would rather build it inside of RF-602 as to...

I think it is not a transistor actually but rather an SCR. The marking on the part is 97A6 and I believe it's an SCR, which in theory might be able to keep 400V... In that case I believe a similar circuit was used in PT-04M triggers.

Is it anywhere in the spec? I haven't seen this... Also, if I can figure out their output stage I should be able to modify it for higher voltage. Unfortunately it is not easy to extract the board fully to see what's on the other side. It's held in place by ho shoe solder joints. In your mod...

Have just opened up mine. The board seems to be the same as shown in the photos, but some parts are different/missing. E.g. in my unit the resistor in the base of Q2 is 560 Ohm (marking 561), and the zero Ohm resistor in the collector path is not installed. Maybe it is Nikon vs. Canon...

Hmm... I see... Yes, I have measured the voltage myself. It is something like 14.7V.

Hello! This is a very useful thread. I was wondering if the OP or anyone else has the schematics of the whole receiver, or of just the output stage for that matter? What was the original transistor? I am trying to determine why RF-602s have issues with Travelite strobes. I had a shoot in a...