Equipment information

Codar Radio Company CR 70A Receiver
Manufacturer:
Model:
CR 70A
Date:
Category:
Group:
Description:
Communication Receiver

Information

Your CR70A Receiver is capable of world wide reception under normal atmospheric conditions. It will give excellent results under adverse conditions and good reception can be obtained with simple indoor aerial systems. However, for consistent long distance reception and improved signal/noise ratio, an outdoor aerial is far superior. The actual length for general coverage is not critical but it should be as high as possible and kept clear of buildings etc. Space limitations determine the total length that can be erected, but if possible an aerial about 30 feet long will give excellent results. Avoid making joints in aerial wire unless soldered as eventual corrision will cause crackling and intermittent signals. Insulators should be used at each end. Where space is a limiting factor, vertical aerials are capable of excellent results. The vertical wire can be installed from upper and lower windows, but should be spaced away from the wall with stand-off lengths of wood or plastic. One advantage of vertical aerials is that they are less directional than the horizontal type, although the pick-up pattern can be effected by local buildings. A good earth can improve results on all bands and will assist in reducing local interference. If a seperate earth to a water pipe or metal pipe driven into the ground is not available, the third pin (the largest earth pin) on the mains plug should be used. Short Wave reception varies on the different bands according to the time of day, period of the year and atmospheric conditions. It will be found that reception on one particular band may be excellent in the morning or afternoon and fade out as darkness approaches. At the same time reception on another band will steadily improve. Sunspot activity and electrical storms will also effect reception considerably.

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Service and User Manual
Manual Type:
Service and User Manual
Pages:
8
Size:
4.30 Mbytes (4509689 Bytes)
Language:
english
Revision:
Manual-ID:
Date:
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
2015 06 12
MD5:
02938f32c861a6bd37c885e19cc095e9
Downloads:
772
Service Manual
Manual Type:
Service Manual
Pages:
3
Size:
1.54 Mbytes (1609988 Bytes)
Language:
english
Revision:
Manual-ID:
Date:
Quality:
Scanned document, all readable.
Upload date:
2015 06 12
MD5:
ac71ce302049790b2a71ec6f045aa07e
Downloads:
674

Information

Service Data

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