30-07-2022, 09:39 PM
Hi.
The Band 1 405 line modulator oscillates perfectly at 45 mhz with a 1ZH37B even down to 18v. A third overtone 54mhz crystal also works.
I think I'll have a go with higher frequencies in a week or two.
Right now I've a 1948 Marconi VT50 taking up all the bench space, a restoration for a friend.
The Band 1 405 line modulator oscillates perfectly at 45 mhz with a 1ZH37B even down to 18v. A third overtone 54mhz crystal also works.
I think I'll have a go with higher frequencies in a week or two.
Right now I've a 1948 Marconi VT50 taking up all the bench space, a restoration for a friend.
