You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
The Feb 2025 Radioddity Giveaway Results are In! Click Here to see who won!

Reply to thread

Message

Giboni -
Sorry I didn't get back to you sooner on this. I looked at the specs on the 2N5770, and your calculations are correct. AC current gain is 66.6 @ 27mhz. The problem with this transistor is that it has a spec'd noise figure (NF) of 6db, which is twice as much as the 2SC1730 (NF=3db), so there would be no point using it as it will actually add noise at the receiver front end.

- 399

[QUOTE="unit_399, post: 512901, member: 7311"] Giboni - [FONT=Verdana]Sorry I didn't get back to you sooner on this. I looked at the specs on the 2N5770, and your calculations are correct. AC current gain is 66.6 @ 27mhz. The problem with this transistor is that it has a spec'd noise figure (NF) of 6db, which is twice as much as the 2SC1730 (NF=3db), so there would be no point using it as it will actually add noise at the receiver front end. - 399 [/FONT] [/QUOTE]

Top Bottom