31-12-2022, 02:36 PM
Philips wasn't a top brand for scopes then or really ever.
But a lot of 1980s gear used unsealed budget miniature relays rather than sealed kind, no doubt cost-cutting by procurement after design.
Do a search on FT102 relays. The earlier Yaesu FT101ZD is more reliable!
https://www.radiomuseum.org/r/yaesu_ft_102.html (Approx 1982)
https://www.jvgavila.com/ft102_1.htm
Corrosion, not dust, is the issue!
So the relays would be the first thing to check, especially if it was erratic ever.
If replacement types are a different pin-out but correct coil voltage, contacts and contact rating, one idea is to use a header with relay upside down. Either custom stripboard or DIL depending on PCB dimensions.
But a lot of 1980s gear used unsealed budget miniature relays rather than sealed kind, no doubt cost-cutting by procurement after design.
Do a search on FT102 relays. The earlier Yaesu FT101ZD is more reliable!
https://www.radiomuseum.org/r/yaesu_ft_102.html (Approx 1982)
https://www.jvgavila.com/ft102_1.htm
Corrosion, not dust, is the issue!
So the relays would be the first thing to check, especially if it was erratic ever.
If replacement types are a different pin-out but correct coil voltage, contacts and contact rating, one idea is to use a header with relay upside down. Either custom stripboard or DIL depending on PCB dimensions.
