UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Non-working Commodore PET 3016

Mark1960 · 19th Mar 2021, 12:16 am

Just to be safe, don’t try powering on the pet with UB2 removed until you have its replacement fitted. Ttl inputs float high and you could end up with two different devices trying to drive the same bus.

19th Mar 2021, 12:16 am	#1176
Mark1960 Octode Join Date: Mar 2020 Location: Kitchener, Ontario, Canada Posts: 1,294	Re: Non-working Commodore PET 3016 Just to be safe, don’t try powering on the pet with UB2 removed until you have its replacement fitted. Ttl inputs float high and you could end up with two different devices trying to drive the same bus.