[GreenKeys] Building my own power supply

[w9ddd at tapr.org]

An original  power supply for the 19 was to supply the current for punch magnet. 
 I'm thinking the original bell system PS I had was rated at 900 mA. There must have been 
3 or 4 different designs over the years.  There was the one with the nice blue glow tubes,
The simple transformer with a selenium rectifier stack and L C filtering.  Then there were 
The ones that regulated with some weird combination L and C that was called something like 
Ferromagnetic resonance regulation.  (Sola made a line of these just to do a range of 
100-150? AC Input, 117 AC regulated output)

Navy Radio has a document or 2 with schematics of the various types. 

---
----
You said "tomorrow" yesterday.
The above comments or recommendations are SWAG. Use at your own risk.
John, W9DDD

> On Aug 12, 2023, at 11:23 PM, Skip Macaulay <ve6bgt at gmail.com> wrote:
> 
> Why a switching supply and also why a high current rating of 830 milliamps?? Isnt this just for the magnet loop supply? Unless I dont get what your doing the loop supply for my model 19 was only 60 milliamps..   Skip
> 
>> On Sat, Aug 12, 2023, 9:13 PM Windows XD, <antech6586856 at gmail.com> wrote:
>> Also I'm fine with, almost prefer if it were tube operated, although I'm not sure if that would push it beyond my skill level.
>> 
>>> On Sat, Aug 12, 2023 at 11:10 PM Windows XD <antech6586856 at gmail.com> wrote:
>>> Dear Greenkeys community,
>>> 
>>> I'm trying to build my own power supply for my Teletype model 19, it needs 120-130VDC of power @ 830Ma. I'm working on a circuit for it, but I don't exactly know what I am doing because I've never done this before. Would you let me know if I am on the right track to building a switching power supply? 
>>> P.S. I know it needs a snubber circuit somewhere and none of the actual switching circuitry is there, I don't know enough to know what goes where.
>>> 
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> 
> Skip MacAulay
> VE6BGT
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> 
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