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Modify Astron Power Supply
Hello everyone,
Regarding Astron Power Supplies, repair, retrofit, information and modifications of the supply hardware and replacement Regulator Boards. There are/were a number of different Astron Power Supply Regulator Board versions made and configured. What is placed on the specific board is related to it's capacity and type of operation. Depending on the year of production, the size and the series the boards can and do change a bit. Here's the url for the Repeater Builder web page,which has a lot of good information: http://www.repeater-builder.com/astr...ron-index.html In some of the online yahoo groups I've mentioned some of the short falls of the original Astron Circuit design and how I dealt with them. Since that time I started selling replacment regulator boards with updates and related information. I offer a complete updated Astron Regulator board package, which is the populated board and instruction sheet. The package also contains my notes, information and various circuit diagrams. The price is $45 plus the cost or US Priority Mail (about $4.35) When your original Astron Board becomes problematic... my drop in replacement is an updated clone of the original board with modern improvements. Indeed Astron has included some of the mentioned improvements onto some of their current regulator boards (but not all). I've also addressed the fairly problematic crow-bar circuit layout and part values to make the retrofit regulator board more stable. I've never had one fail... The variable supply is the same type board with part modifications to allow adjustment of the output voltage within a practical range. The ability to convert your specific supply to variable control is probably more dependent on the date of mfgr of your regulator and the version of your board. I have a list of each original Astron Regulator Board part value based on size and the values on my replacement boards. If you've charcoaled a part value I can supply the value information. By Email and telephone I'm happy to help you trouble shoot your supply, regardless of the mfgr. But my time is limited and I might not get back to you right away so please be patient. cheers, skipp skipp025 at yahoo.com www.radiowrench.com : Toby wrote: : I have an Astron RS-20A, 20amp 12v fixed DC supply. I've heard that people : have modified this model to become a variable voltage supply but have not : found any schematics etc for this mod. Can anyone point me in the right : direction? Thanks! |
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