UPDATE - RF Generator Mod. for 72-585
Original: http://bleepmicro.livejournal.com/57141.html
Here is an update to this modification.
1. Here you can see the version number of the pcb 'Version 01'. The two diodes on the left are what you are looking for. Btw, they are the only diodes on the pcb.. so, it should be pretty easy to find them. ;-)
2. This is the back side of the pcb, you can can easily see the cathodes of the two diodes are tied together. This is the point we will tap from. The metal chassis is 0volts.
3. A quick measurement will show we are at the right spot. Again, not that we need to do this as there are only two diodes and they both come directly from the transformer. (Vout=Vdc+Vac) Keep in mind this is still fairly unregulated dc voltage at this point.
4. The voltage tap going to the amp board. (unreg+24v to reg+12v)
5. A shot of the power trends voltage regulator I used. Again, it is what I had on hand, you can use a standard 7812 type voltage regulator without issue, it just burns a bit more electrons as heat.
6. The +12 volt regulated power supply schematic for the RF amp.
Disclaimer:
This information and the circuits are provided as is without any express or implied warranties. While every effort has been taken to ensure the accuracy of the information contained in this text, the authors/maintainers/contributors assume no responsibility for errors or omissions, or for damages resulting from the use of the information contained herein.
I disclaim everything. The contents of the articles might be totally inaccurate, inappropriate, or misguided. There is no guarantee as to the suitability of said circuits and information for any purpose whatsoever other than as a self-training aid. I.E. If it blows your equipments, trashes your hard disc, wipes your backup, burns your building down or just plain don't work, IT ISN'T MY FAULT. In the event of judicial ruling to the contrary, any liability shall be limited to the sum charged on you by us for the aforementioned document or nothing, whichever is the lower.
I will not be held responsible for any damages or costs which might occur as a result of my advice or designs. All of my designs are allowed to be used for commercial purposes without my written authorization.
Chemical Safety:
Use of any and all Chemicals is simple “Read the damn Label” and don’t be a Hero or an Idiot.
Use, Recycle, Reuse and Dispose of everything properly.
Here is an update to this modification.
1. Here you can see the version number of the pcb 'Version 01'. The two diodes on the left are what you are looking for. Btw, they are the only diodes on the pcb.. so, it should be pretty easy to find them. ;-)
2. This is the back side of the pcb, you can can easily see the cathodes of the two diodes are tied together. This is the point we will tap from. The metal chassis is 0volts.
3. A quick measurement will show we are at the right spot. Again, not that we need to do this as there are only two diodes and they both come directly from the transformer. (Vout=Vdc+Vac) Keep in mind this is still fairly unregulated dc voltage at this point.
4. The voltage tap going to the amp board. (unreg+24v to reg+12v)
5. A shot of the power trends voltage regulator I used. Again, it is what I had on hand, you can use a standard 7812 type voltage regulator without issue, it just burns a bit more electrons as heat.
6. The +12 volt regulated power supply schematic for the RF amp.
Disclaimer:
This information and the circuits are provided as is without any express or implied warranties. While every effort has been taken to ensure the accuracy of the information contained in this text, the authors/maintainers/contributors assume no responsibility for errors or omissions, or for damages resulting from the use of the information contained herein.
I disclaim everything. The contents of the articles might be totally inaccurate, inappropriate, or misguided. There is no guarantee as to the suitability of said circuits and information for any purpose whatsoever other than as a self-training aid. I.E. If it blows your equipments, trashes your hard disc, wipes your backup, burns your building down or just plain don't work, IT ISN'T MY FAULT. In the event of judicial ruling to the contrary, any liability shall be limited to the sum charged on you by us for the aforementioned document or nothing, whichever is the lower.
I will not be held responsible for any damages or costs which might occur as a result of my advice or designs. All of my designs are allowed to be used for commercial purposes without my written authorization.
Chemical Safety:
Use of any and all Chemicals is simple “Read the damn Label” and don’t be a Hero or an Idiot.
Use, Recycle, Reuse and Dispose of everything properly.