UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Which is the best performing 4 valve+rec. receiver?

Chris Parry · 28th Dec 2011, 4:12 pm

Type EFM1 is strange. It led a short production life, being made only by the Philips companies and Tungsram. It drove its beam deflection electrodes from the screen grid of an integral AGC controlled audio pentode. The dynamic range of the display was slightly lower than a 6U5/6G5, and far below what was achieved only 2 years later by the EM4 which was the precursor to the famous EM34. The EFM1 was made in Germany in re-based form as the EFM11, and in Italy as type WE18. All are nowadays firmly in the "collectors" category. Chris.

28th Dec 2011, 4:12 pm	#7
Chris Parry Retired Dormant Member Join Date: Jun 2011 Location: Waterlooville, Hampshire, UK. Posts: 237	Re: Which is the best performing 4 valve+rec. receiver? Type EFM1 is strange. It led a short production life, being made only by the Philips companies and Tungsram. It drove its beam deflection electrodes from the screen grid of an integral AGC controlled audio pentode. The dynamic range of the display was slightly lower than a 6U5/6G5, and far below what was achieved only 2 years later by the EM4 which was the precursor to the famous EM34. The EFM1 was made in Germany in re-based form as the EFM11, and in Italy as type WE18. All are nowadays firmly in the "collectors" category. Chris.