Practical Wireless November 1960, Pocket Superhet

Practical Wireless Pocket Superhet 

The PW Pocket Superhet described in the November 1960 issue was a 6 transistor and 1 diode pocket transistor radio designed for medium and long wave reception

Using germanium transistors through out, the OC44 in the front end was really pushing the technology with a

Transition frequency (ft),  8 MHz: 

a Forward current transfer ratio (hFE), min: 100

Maximum collector-emitter voltage (Uce), V= 12

as usual for the time period one slight mistake and the device was ruined and at 28/- each, that's 28 shillings or £1.40 in decimal currency, which would equal £28 each in today's money, so failure of a device would be a financial disaster.

Click here to see how poor the GB £'s value actually is now

Measuring Worth

Semi conductor line up

OC44 RF & Oscillator/mixer

OC45 1^st IF

OC45 2^nd IF

OA81 Demodulator & AGC

OC71 Audio driver

2 x OC72 Push pull Audio O/P

                                                                Power = PP4  9volt battery

                                                             Speaker 2 1/2" Celestion 3 ohm

I regularly use this site for Transistor Data

All Transistors

I am fairly lucky my dad sent off to Practical wireless for the case, seen here

and started buying the parts each week what actually happened is lost in time

but he never made it.

I have been left a mint case and a Circuit diagram supplied by an old friend

who's dad did make his 

                                                                     The Blue Print

I have all the parts to build mine

the Question now is

Shall I