Does anyone recognise the below Roger K beep board please?
Marking on the back just says PTK3 and (C) 1981, had a google but no luck
Trying to find info to hopefully repair and re-fit, just removed it from my old Tristar 747 that hasn't been powered for many years, the beep board was causing interference to the mic audio so I removed it and put the wiring back to standard.
Regards
Bozzy
Which Roger K Board is this?
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bozzy
- Super Member
- Posts: 126
- Joined: 19 Aug 2016, 21:34
- Location: York
Which Roger K Board is this?
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bozzy
- Super Member
- Posts: 126
- Joined: 19 Aug 2016, 21:34
- Location: York
Re: Which Roger K Board is this?
Just to follow up, I cleaned up the soldering on the back, fitted new wiring, bench tested it and it appeared to work.
Refitted it and it does work now.
What helped was the below link.
http://dl5dbm.darc.de/rp_e.pdf
This is not the exact same design but it is very similar using the same HCF4017 counter chip working as a shift register for the "dash dot dash", but mine has more transistors on it, as I say sorted now but if anyone can recognise my board it would be interesting to learn where it came from.
Regards
Bozzy
Refitted it and it does work now.
What helped was the below link.
http://dl5dbm.darc.de/rp_e.pdf
This is not the exact same design but it is very similar using the same HCF4017 counter chip working as a shift register for the "dash dot dash", but mine has more transistors on it, as I say sorted now but if anyone can recognise my board it would be interesting to learn where it came from.
Regards
Bozzy