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Ever Ready Sky Baby - Power supplies.
Turnip:
Hi folks,
Have a nice one in, where would like to sort 90v and 1.5v from maybe 4 C cells using an inverter rather than heaps of 9v batteries in series.
Had a look on Ebay but buck converter modules rarely give more than 30v with a 4.5v input, so thinking of a few turns on the buck coil, rectified and added to the output.
Gather set only needs 15m/a at 90v so less than a couple of watts.
Wonder if anyone has had a try ? - Chris.
astracat:
hi turnip
may be this doubled up might do it
https://www.maximintegrated.com/en/app-notes/index.mvp/id/3425
old car used a valve radio but it used a vibrator pack if remember it was quite good
regards
astracat
Turnip:
Hi Cat,
You're going back a bit to the self rectifying vibrator pack or the OZ4 cold cathode rectifier thingy. Fixed some in the late 50's, and they were horrid.
Even worse were car radios using valves with a 12v HT and a Germanium OA or AD -XXX something or other for output.
Feel that radios using the 'Dxxxx' series valves economical and nifty.
Many thanks your for interest, checked download, but I need 15 M/A at 90v - Chris
astracat:
hi turnip
showing our ages ha ha ,brought up on valve stuff and lighting fags on eht anode cap sparks ,remember pl509 where cathode resistor went o/c with lack of width,any way will keep looking for you maybe with a cocroft multiplier on output
good luck
astracat
ps this is a circuit designed for this 90 volt battery converter using 5x1.3 v battery including charger circuit
http://www.dos4ever.com/battery/final.pdf
Turnip:
Thanks 'Cat'
Recall used to light fags from the Ferguson jelly pot LOPT. Only issue was when I tried re-light one after lunch, fag being a bit damp.
Thinking Cockroft/Walton, Chris Cockroft popped by with a mend a few weeks ago. Didn't know him from Adam, but he soon
sorted me about nuclear fission and stuff leaving me more confused than ever.
Have a nice picture of the Cockroft family where Chris is the young lad on the right. Just my age - Chris.
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