| Use | Self-recording L-band equipment for the interception of signals from the Wurzburg radar, recording the wavelength, time and duration of the received signal. |
| RAF designation | ARI 5548 |
| US designation | - |
| Main items | Receiver 1622 Power unit 659 / 556 Indicator 230 Control unit 427 |
| Wavemeter testset TS 251, TS 252 & TS264 | |
| Remarks | Developed by TRE |
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| Use | An automatic receiving device which was designed to provide photographic record of all signals received within a pre-set band. | |
| Blonde Mk I | Blonde Mk II | |
| RAF designation | ARI 5533 | ARI 5593 |
| US designation | ||
| Main items | ||
| Remarks | Developed by TRE, only ground use. | |
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| Use | Mobile ground station for accurate direction finding of enemy Wurzburg radar | |
| RAF designation | ||
| US designation | ||
| Main items | ||
| Remarks | ||
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