Dynaport, Portadyne 3 band radio c.1966

This looked so sad when I found it all the chrome had rubbed away from the front from years of being handled by the on-off switch and tuning knob. The chrome caps were missing from the control knobs, it didn't work and had been modified from battery to power pack. After doing a little research, it turns out that this is quite a rarity, I guessing it was a bit experimental at the time. Mullard had introduced integrated modules that aloud repairing and making radios a little easier. But like most technology it was soon outdated by the integrated circuit. So not a lot of these types of radios were made, I think Roberts dabbled with the modules for a while. The main two introduced were the audio or amplifier unit (LP 1153) consisting of 4 transistors of Mullard own;  2 x AC127 and 2 x OC81 range and the other was an IF unit with 3 AF (oo-ah) transistors (LP1156). 

Mullard LP 1153 audio module circuit

Circuit for Mullard LP1156 IF Module

(A)  - Band switching/coils (B) - IF module (C) - Audio module

I had faults on unit B all transistors were intermittent working (taping restored for a while) and C had an AC127 short circuit. In fact the only unit made by Dynaport (A) was the only working part, lol although the switches needed cleaning, so perhaps not. 

Mullard audio module

I decided to spray the faded chrome front with gold paint that brightened it up. Then cut some gold card into discs with a 10 pence coin as a template then glued. The modules were released in 1966, so it's assumed the radio was built that year to, but can't be sure.

Mullard IF module inside