27-07-2020, 09:05 AM
Technically the 7th detector is cunningly wired to give a lower on resistance than a silicon diode, but the turn on will still be 0.6 to 0.63 approximately. So an 1N60 will work better. The Silicon transistors are now cheaper, which is why they do it!
The 1.25V to 1.3V approximate regulator for the receiver HT is a curious feature. I must compare with D1 and D2 open, over a 1.8V to 3.2 supply range (2 x Alkaline cells to end of life). Other than that it's like a silicon version of a germanium pocket set used for 1960s Caroline and Luxembourg
The 1.25V to 1.3V approximate regulator for the receiver HT is a curious feature. I must compare with D1 and D2 open, over a 1.8V to 3.2 supply range (2 x Alkaline cells to end of life). Other than that it's like a silicon version of a germanium pocket set used for 1960s Caroline and Luxembourg
