[GreenKeys] Model 15/19 power supply 120VDC

[Brenda Gentry]

Thanks for mentioning the light show! A friend had a model 19 table that 
had the panel that hid the power supply removed for some reason. Make a 
tape and enjoy the light show all over the room.

    Brenda Gentry, KA2IVY

On 3/3/26 11:08 PM, eric wrote:
> And when it's drawing current, the thyratrons in the REC-30 power 
> supply glow brighter, so it's a really nice light show while you're 
> typing -- https://www.youtube.com/watch?v=fxy2Ifo8Xx0
>
> fwiw i measured mine at 600-700mA at 120vdc with the punch engaged so 
> yeah I'd definitely count on it really needing 1A.
>
> -eric
>
> On 2026-03-03 17:58, E. wrote:
>> Yeah, while the punch sits there, it draws nothing (so as long as the 
>> 14TD isn’t powered on alongside it… usually the two are tied to the 
>> same power source)… but when a punch occurs, the amperage very 
>> quickly and briefly spikes up to around 1A.  Type as fast as 
>> ‘punchingly' possible and you can imagine how many spikes can be had 
>> within a short period of time.
>>
>>
>>> On Mar 3, 2026, at 7:49 PM, Johannes Eggers 
>>> <johannes.eggers at gmail.com> wrote:
>>>
>>> So, with the punch running, does it actually draw 1 Amp ? That'd be 
>>> 120 Watts, which seems a lot.  If the printer solenoid takes 60mA at 
>>> 120V, so 7 Watt, then the 5 punch solenoids would have to draw 3 
>>> times as much, each, to get to 100 Watts.
>>>
>>> That PSU runs about $200 now, double-yikes !
>>>
>>> Thanks for the info.  I'm a little bit wiser now, but I still don't 
>>> understand what I hear about the 60mA loop current: If I put a 2k 
>>> resistor in series with a 120VDC supply, then the current will be AT 
>>> MOST 60mA (if the solenoid shorts out), but if the solenoid is OK, 
>>> then I'll get LESS than 60mA.  I need to find my Model 15 and 
>>> measure the coil resistance.
>>>
>>> I assume when the punch isn't punching, it draws nothing?
>>>
>>> Thanks,
>>>
>>> Johannes
>> ______________________________________________________________
>> GreenKeys mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:GreenKeys at mailman.qth.net
>>
>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool: 
>>>>> https://teletype.net/gksearch
>>>>> 2002-to-present greenkeys archive: 
>>>>> http://mailman.qth.net/pipermail/greenkeys/
>>>>> 1998-to-2001 greenkeys archive: 
>>>>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: 
>>>>> http://comcents.com/tty/greenkeyssearch.html
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to epvgk at limpoc.com
> ______________________________________________________________
> GreenKeys mailing list
> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:GreenKeys at mailman.qth.net
>
>>>> Jordan Spencer Cunningham's GreenKeys Search Tool: 
>>>> https://teletype.net/gksearch
>>>> 2002-to-present greenkeys archive: 
>>>> http://mailman.qth.net/pipermail/greenkeys/
>>>> 1998-to-2001 greenkeys archive: 
>>>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: 
>>>> http://comcents.com/tty/greenkeyssearch.html
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to ka2ivy at verizon.net
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20260303/a580ac8e/attachment.html>