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R.A.F. Henlow Signals Museum Exhibits for disposal |
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R.A.F. Henlow Signals Museum Exhibits for disposal |
| Full Listing |
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=0331.jpg "Meter Power (Marconi)") |
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| Meter Field Strength I-95 BM | Meter Frequency Type BC-221-N | Meter Frequency Type BC-221-T | Meter Milliameter for R1084 | Meter Power (Marconi) |
Meter Frequency Type BC-221-T
This ubiquitous American item was used for calibrating wireless equipments. It is a 125kc/s to 20Mc/s heterodyne frequency meter, with an internal crystal calibrator, and individual calibration book for each unit. Basic accuracy is better than 0.034% over its operating temperature range. An HS-30 type headset, or similar, is required for operation. The units were supplied with one spare set of vacuum tubes inside. |
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Meter Frequency Type BC-221-T (Photograph Number 0175) Click on the image to get the full size image. |
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