HP-45, PSU and testing points

[teenix]

(03-03-2019 10:13 PM)albertofenini Wrote:  The transistors are marked F4 094 427 and 0550
The diodes should be 1N4148 except for the zener
we don't know the voltage value for the zener
Capacitors should be replaced with tantalium or with Electrolytics ?
The disc capacitor I think is a ceramic one

Thanks for any advice on this subject !

Jarques Laporte mentions

0550 - 2N3904
other - 2N3704
tantalium or electrolytic, either is fine, but tantalum more compact.

cheers

Tony