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arjoll · 2nd Jan 2020, 8:45 pm

Thanks for the replies.

The modulator is a UM1622 - I can't find too much information on it though. There is talk in one forum about it being used for at US BBC mod, but I'm hoping that's just because it's VHF, not because of any other differences.

I'll also check the voltages as well and make sure they make sense before going any further. Low memory in this is made up of 4116s.

If I have no luck, it'll be a matter of grabbing a working 'scope (I have a flaky dual trace Telequipment of some description here, but it's in the "to do" pile).

2nd Jan 2020, 8:45 pm	#8
arjoll Dekatron Join Date: May 2006 Location: Invercargill, New Zealand Posts: 3,457	Re: Spectrum advice Thanks for the replies. The modulator is a UM1622 - I can't find too much information on it though. There is talk in one forum about it being used for at US BBC mod, but I'm hoping that's just because it's VHF, not because of any other differences. I'll also check the voltages as well and make sure they make sense before going any further. Low memory in this is made up of 4116s. If I have no luck, it'll be a matter of grabbing a working 'scope (I have a flaky dual trace Telequipment of some description here, but it's in the "to do" pile).