R-107
R-107 in the REME Museum
The Reception Set R-107 is a British WW-II receiver, covering the HF spectrum from 1.2 to 17.5 MHz in three frequency ranges:
Range 1. 17.5 - 7.0 MHz
Sensitivity is 1 uV in CW and 2 to 6 uV in AM (30% mod at 400 Hz) at S/N ratio of 20 dB.
IF selectivity: 'Narrow': 3 KHz at -6dB, slope of 15dB/kHz
IF frequency: 465 kHz
Audio filter: passband 300 Hz wide at center frequency of ~900 Hz.
The receiver can be operated with AC, 100 to 250 VAC (power consumption is 31 W) or from a 12 VDC battery (built-in vibrator supply) at 3 A. AC/DC switching is in the power supply section inside the receiver, as well as multiple AC voltage taps.
In these pages, I will show the restoration process of my R-107 receiver. This is a 'live page', as I am going to update it regularly as I progress with the restoration. I would like to hear from anybody who has a similar set, as the one I have is needing lots of work. Thanks!.
Range 2. 7.25 - 2.9 MHz
Range 3. 3.0 - 1.2 MHz
'Wide' : 7.5 KHz at -6dB, slope of 12dB/kHz
Reference Function Type V1A RF Amplifier A.R.P.34 (EF39) V1B Mixer A.R.P.34 (EF39) V1C 1st IF Amplifier A.R.P.34 (EF39) V1D 2nd IF Amplifier A.R.P.34 (EF39) V2A VFO A.R.21 (EBC33) V2A' BFO A.R.21 (EBC33) V2B 1st AF Amplifier A.R.21 (EBC33) V2B' 2nd AF Amplifier A.R.21 (EBC33) V3A Rectifier (6X5G)
Reception Set R-107 page INDEX
Any contribution or idea to enhance this page would be welcomed!.