[GreenKeys] Loop supply options

[epvgk at limpoc.com]

That looks pretty good, and it's really cheap! Do you know how much power
it can put out? Presumably it manages at least 60 mA. 

eric

On Sat, Sep 07, 2019 at 03:16:26PM -0400, Ralph Mowery wrote:
> 
> You may want to use something like I have played with.  It is a dc to dc
> module. They cost around 5 ot 10 dollars from China.  It takes from about 10
> to 20 volts input and will give you 50 to 300 volts out.  You can do like I
> did and feed it with a wall cube that has about 12 volts to 20 volts output
> at 1 to 2 amps.  That and a resistor of about 2000 ohms at 10 to 20 watts is
> all you need.  You can adjust the voltage to set the current to 60 ma or 20
> ma with a different resistor.
> If you go this route, be careful as it is powered by a 12 v cube the high
> voltage output can be deadly just as any high voltage.
> 
> 
> https://www.ebay.com/itm/DC-DC-10-32V-to-45-390V-High-Voltage-Boost-Converte
> r-Step-up-Booster-Module-Lh/392189368487?hash=item5b504ed8a7:g:rZUAAOSwPWRZX
> F4g
> 
> As others have mentioned be sure to use a resistor with the supply you
> mentioned (or any other one) of around 2000 ohms for a 100 to 150 volt
> supply to set the current to 60 ma, or 20 ma in some cases.
> You can often get by with about 50 volts if it is just one machine and
> local, not over the radio.
> 
> Ralph ku4pt
> 
> 
> 
> 
> -----Original Message-----
> From: greenkeys-bounces at mailman.qth.net
> [mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of Harold Hallikainen
> Sent: Saturday, September 07, 2019 11:32 AM
> To: Jeffrey Angus
> Cc: greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] Loop supply options
> 
> When I finally power up my Teletype, I plan on using this as a loop supply:
> 
> https://www.mouser.com/ProductDetail/International-Power/IHB120-02?qs=MKoP7O
> yr0W4tUbkG3QpCWg%3D%3D
> 
> Harold
> 
> 
> 
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