| Electronics > Repair |
| Metcal STSS-001 RFG-30 Disassembly and Measurements |
| << < (4/5) > >> |
| H713:
Out of curiosity, what connector do the cartridges use? I'm intrigued by that DIY wand. |
| Jamieson:
Sorry to necro this thread... but how the heck do you remove the top plastic cover on the power unit? The older (STSS-001) RFG-30 unit does not have any exposed screws on the top cover. I've tried prying it up but it sure feels like it is screwed down in some way. |
| Dan_CA:
Jamieson If I remember correctly there is a thin plastic sheet glued to the top cover which covers the screws. The screws are in the corners so you can cut the sheet there and lift the corners off. Looks like I just removed the whole sheet and it could not be put back on. |
| Jamieson:
There it is. Thanks Dan! |
| Jamieson:
I have two STSS-001/RFG-30 power units. The first one is a dumpster find and looks like the one Dan showed in this thread. It is serial number 4007910. It has quite a few kludges and bodge wires, with the smaller red daughterboard. That to me looks like they were still trying to add on a protection circuit and kludged it up to make it work. On this board I believe the VTX749 on the power supply board is blown; waiting on replacement parts. The other STSS-001/RFG-30 I just got today. I bought it super cheap AS-IS and it not surprisingly it doesn't work. It has serial number 2006685 looks like an earlier model, shown below. Both the RF board and power supply board are much cleaner and show no evidence of being kludged/hacked up. This design seems to be older, and much closer to the design from the Metcal patent 4,626,767 and components have a date code from 1987, so this may be the very first generation Metcal. On the RF board I found a few bloated 10uF caps and the RF power amp FET IRF131 has a gate to drain short, which smoked a 100 ohm resistor connected to it. |
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