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I made the swap today, using a Sanyo 2SC2999-D. Has about the same Hfe range as the original 2SC1730L, but lower noise figure. Have not changed the detector diodes. The 2SC2999E is hard to find.

On the generator, had a couple more dB C/N at 7.8 Mhz, and picked up 1/2 an S meter reading, from 8 to 8.5.

Initial results are more sensitive on AM (CB), picking up noticeably better voice articulation than the TRC 433, after a couple of hour comparison. Very pleased with the AM improvement.

As far as SSB, right now CH 38 is very quiet, just a couple of people talking, no location given.

Update- # Worldwide Radio 0527-the voice of Jamaica, is coming in very clear now. He's also contacting Barbados and Cuba. This is at 16:20 EDT. This guy is coming in over the top of #2966 San Diego.

[QUOTE="KG6YGE, post: 418150, member: 28834"] I made the swap today, using a Sanyo 2SC2999-D. Has about the same Hfe range as the original 2SC1730L, but lower noise figure. Have not changed the detector diodes. The 2SC2999E is hard to find. On the generator, had a couple more dB C/N at 7.8 Mhz, and picked up 1/2 an S meter reading, from 8 to 8.5. Initial results are more sensitive on AM (CB), picking up noticeably better voice articulation than the TRC 433, after a couple of hour comparison. Very pleased with the AM improvement. As far as SSB, right now CH 38 is very quiet, just a couple of people talking, no location given. Update- # Worldwide Radio 0527-the voice of Jamaica, is coming in very clear now. He's also contacting Barbados and Cuba. This is at 16:20 EDT. This guy is coming in over the top of #2966 San Diego. [/QUOTE]

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