28-07-2018, 10:04 AM
I have had in my possession for too many years to remember the empty case of a Burndept model 272. A similar Vidor branded version was also made. The sets were made in 1939.
The receiver is a simple three valve TRF. The RF amplifier was a Mullard VP2, the detector another VP2 and the output is a Mullard PM22A.
The receiver has an internal frame aerial and to date that's the only component that has been made for the set. Ed Dinning kindly made and tested the new aerial for me. Excellent Q figures.
A better substitute for the huge VP2 pentodes will be the Mazda VP23, filament consumes only 50mA compared with 180mA for the Mullard VP2 and 135mA for the VP2B.
Even better than an internal frame aerial is a ferrite rod, was such an aerial used in a commercially made TRF radio?.
Geordie McBoyne.
The receiver is a simple three valve TRF. The RF amplifier was a Mullard VP2, the detector another VP2 and the output is a Mullard PM22A.
The receiver has an internal frame aerial and to date that's the only component that has been made for the set. Ed Dinning kindly made and tested the new aerial for me. Excellent Q figures.
A better substitute for the huge VP2 pentodes will be the Mazda VP23, filament consumes only 50mA compared with 180mA for the Mullard VP2 and 135mA for the VP2B.
Even better than an internal frame aerial is a ferrite rod, was such an aerial used in a commercially made TRF radio?.
Geordie McBoyne.
