J0133-3629|OK | 0.7 |0- 10. |Extremely large and diffuse 3C48 |Irreg.| A|0- 5000. |Can be used up to 40GHz for VLA Fornax A |OK | 0.2 |0- 0.05|Generally unsuited for interferometers 3C123 |OK |15. |0- 1000. | J0444-2809|OK | 5. |0-> 50. |Probably useful to longer spacings Pictor A |<4 | 1.2 |0- 30. | 3C138 |Irreg.| A|0- 5000. |Strongly confused below 500lambda at the P band 3C144 |Slow | 1.2 |0- 2. |Too diffuse for use at high frequencies 3C147 |Irreg.| A|0- 5000. | 3C196 |OK | A|0- 1000. | 3C218 |<10 | 1.5 |0- 250. | 3C274 |<4 | 0.7 |0- 10. |Compact structure could be used at high resn. 3C286 |OK | A|0- 5000. | 3C295 |OK | A|0- 2000. |Too weak at high frequencies and resn. 3C348 |OK | 3. |0- 100. | 3C353 |OK | 2. |0- 20. | 3C380 |<1? |30. |0- 5000. |Complicated model required 3C405 |OK | 5. |0- 250. | 3C444 |OK | 5. |0- 20. | 3C461 |Slow | 1. |0- 5. |