Columbia Electro-Graphophone Model 300 - UK Vintage Radio Repair and Restoration Discussion Forum

Condenser · 21st Aug 2018, 2:31 am

Hi

Does anyone have any information on this model? it is a good quality mahogany console model with belt-driven turntable, the motor with 3-ball governor and speed adjuster. It has a 2-stage power amplifier with push-pull PX4s and a 3-stage TRF radio with reaction. Looks like 1929-1930. Could post pictures of it if anyone is interested. Appears to date from before the union with HMV. Thanks. David.

Herald1360 · 21st Aug 2018, 4:14 pm

No information other than at that early date, the PX4s would have been the earlier lower power balloon type. You could check the filament current at 4V to see if it is <1A.

21st Aug 2018, 2:31 am	#1
Condenser Diode Join Date: May 2018 Location: Duncan, British Columbia, Canada Posts: 8	Columbia Electro-Graphophone Model 300 Hi Does anyone have any information on this model? it is a good quality mahogany console model with belt-driven turntable, the motor with 3-ball governor and speed adjuster. It has a 2-stage power amplifier with push-pull PX4s and a 3-stage TRF radio with reaction. Looks like 1929-1930. Could post pictures of it if anyone is interested. Appears to date from before the union with HMV. Thanks. David.

21st Aug 2018, 4:14 pm	#2
Herald1360 Dekatron Join Date: Feb 2007 Location: Leominster, Herefordshire, UK. Posts: 16,536	Re: Columbia Electro-Graphophone Model 300 No information other than at that early date, the PX4s would have been the earlier lower power balloon type. You could check the filament current at 4V to see if it is <1A. __________________ ....__________ ....\|____\|\|__\|__\_____ .=.\| _---\__\|__\|_---_\|. .........O..Chris....O