| Airmec Wave Analyzer |
Used to look at 150 MHz Tsikada and Parus Signals |
Loaned by Pye-Phillips |
Unknown |
| Frequency Meter - BC-221 (or similar) |
Stable oscillator to act as BFO and tuning aid when receiving CW transmissions with the Marconi CR-100 |
Lent by Cyril Dobson, a radio amateur living in Kettering (call sign G3ICK), returned when Derek Slater acquired a permanent replacement |
Not known |
| Frequency Meter - BC-221 |
Stable oscillator to act as BFO and tuning aid when receiving CW transmissions with the Marconi CR-100 |
Acquired by Derek Slater to replace the loan item from Cyril Dobson
Use alternated with the CRR-74028
Fell out of use on arrival of Racal RA-217 for 1968 but later pressed into occasional use for tracking multiple HF satellites simultaneously |
Formerly part of the Derek Slater collection - passed to British National Space Centre during 2011 |
| Frequency Meter - CRR-74028 |
Stable oscillator to act as BFO and tuning aid when receiving CW transmissions with the Marconi CR-100 |
Acquired by Derek Slater to replace the loan item from Cyril Dobson
Use alternated with the BC-221
Fell out of use on arrival of Racal RA-217 for 1968 but later pressed into occasional use for tracking multiple HF satellites simultaneously |
Formerly part of the Derek Slater collection - passed to British National Space Centre during 2011 |
| Audio Unit |
Amplifier and loudspeaker |
School property - general science
Used with the Hallicrafters when not needed for teaching |
Unknown |
| VHF Pre-amplifier |
Amplification of VHF frequencies |
Constructed by Derek Slater and mounted in re-used tobacco tin (Old Holborn) |
Formerly part of the Derek Slater collection - disposed of "to a good home" 2009 |
| Output/speaker Interface for RA-217 |
Speaker system for RA-217 and clean output to GNT Undulator |
Specially-built (possibly by Derek Slater) |
Geoff Perry Collection |
| Pre-amplifier 137-150 MHz |
Use with VHF receiver |
Supplied by Dick Flagg |
Derek Slater Collection |
| Panoramascope |
Panoramic Adaptor used with the Hallicrafters S-27B receiver |
Became unrepairable |
Probably loaned by the Clarendon Laboratory, Oxford - later passed to another school together with Hallicrafters receiver |
