If I recall it had the perforator on the left side of the machine.. It was quite a long time ago but I have pixs of it.. I know for a fact I didnt have more than around 60 ma going through it.. All my machines back then were on a common loop, I could switch them in and out.. The only one seperate was the 28 I still have today and it was seperate cause it was geared for 100 wpm and used a electronic UART circuit to convert it up from the 19 set.. It was a long time ago..

My 28 perforator unit now is only 60 milliamps, same paper but different machine I guess.. I just dont recall using anything more than around 150 volts DC at 60 milliamps.. Always just used a 110 to 110 transformer, simple rectifier and cap and a large resistor for current regulation to 60 ma...

I dont know more than that... Skip

Skip MacAulay
VE6BGT

On Sat, Aug 12, 2023, 10:48 PM Jim Cooper, <jim.w2jc@gmail.com> wrote:

On 12 Aug 2023 at 22:23, Skip Macaulay 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 ... did you have a perforator
on your Model 19? the perf magnet
needs to SLAM the pins thru the paper
tape, and it takes a lot more than 60 mA
to do that !! Have you ever seen the
REC-29 power supply that went under
(inside) the Model 19 table?

w2jc