Roberts R77 Schematic purchase

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Schematics sent by Email £1.80 (~ $2.20 or €2.10)

Wednesday 24/4/2024 19:10
I am away until Thursday evening 21/12/2023 I cannot send any schematics marked TO SCAN until home, pre-scanned ones will be sent probably in the evening UK time
Roberts R77 (Trader : Radio Trader-1321-1957 P: pdf)
£1.80 (~ $2.20 or €2.10)
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Roberts R77 Specification spec data sheet

These notes are automatically scraped from Google, Bing, Yahoo, Yandex
by an Artificially (not so) Intelligent algorithm
CountryGreat Britain (UK)
ManufacturerRoberts Radio Co.Ltd., East Molesey, Surrey, UK
Model R77 - Roberts Radio Co.Ltd., East
YearBroadcast Receiver
Valves4: DK96 DF96 DAF96 DL96
TechnologySuperhe 2 AF stages
Tuned Circuits6 AM circuits
Wave BandsBroadcast (MW) and Long Wave.
Power TypeDry Batteries 1.5 and 90 Volts
Dimensions9 x 6 x 3.5 inch / 229 x 152 x 89 mm
Net Weight4 lb 8 oz / 2.043 kg
NotesReal leather Binocular style case with shoulder strap.
Under the main body leather the case is heavy card with a steel border riveted on top edge which the chassis is mounted on.
Bottom unzips to replace the battery packs. Radio may be listened to with top zipped closed.
Batteries: HT B126 and LT AD35. Perhaps 75 to 100 hours battery life
(later AD35 in late 1960s may have been shorter life).
Repackaged in 1958 as Roberts R88, probably the last Roberts Valve Portable.
Possibly the R77 is the penultimate portable from Roberts before the transistor Roberts RT1.
Possibly first Roberts portable to use a PCB (Pye was a couple of years earlier).
The speaker grill is very much smaller than the loudspeaker unit...