[GreenKeys] ASCII/RS-232/AFSK Interface for the Model 15 Teletype

[Mike Douglas]

Eugene,

Unfortunately, no, this board can’t easily be configured to work with an external loop supply.

Mike

> On Jun 26, 2022, at 12:06 PM, W2HX <w2hx at w2hx.com> wrote:
> 
> What a great project! I have a question. Could the circuit be modified to only key an existing loop without the need for this board to generate the loop current itself? I would imagine maybe less components needing installation and some jumpers but I was wondering your opinion of that.
> 
> 
> 73 Eugene W2HX
> Subscribe to my Youtube Channel: https://www.youtube.com/c/w2hx-channel/videos
> 
> -----Original Message-----
> From: greenkeys-bounces at mailman.qth.net <greenkeys-bounces at mailman.qth.net> On Behalf Of Mike Douglas via GreenKeys
> Sent: Sunday, June 26, 2022 12:35 PM
> To: GREENKEYS BULLETIN BOARD <greenkeys at mailman.qth.net>
> Subject: [GreenKeys] ASCII/RS-232/AFSK Interface for the Model 15 Teletype
> 
> I recently made a new version of the subject interface board that incorporates the changes I made to the prototype unit that you may have seen in a few videos I posted. I've made a web page to document this new version - see the link below. I still need to write a user manual and finish a small wish-list I've given myself for the firmware.
> 
> https://deramp.com/model15_interface.html
> 
> I have a number of bare PCBs of this new version if anyone wants one - just contact me. I'd still like to work with someone to tweak components and firmware as needed for a holding magnet configuration.
> 
> Mike
> 
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