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

Hi Andy,
I've read about some of the things you've discussed here and actually think I've seen it before when I was working with other transistors in parallel. Without installing certain resistors in the gate circuit, one would latch on and burn up. The transistors I'm working with today also have very fast rise and fall times suitable for use into VHF. While I do not have enough internal knowledge of the transistor workings, manufacturers are claiming these parts will transition between a positive coefficient at lower output levels and invert to a negative coefficient at "more practical" power levels. I have definitely seen this on the bench prior to stabilizing the bias tracking, but have no real way of confirming the source.

[QUOTE="Shockwave, post: 724728, member: 10882"] Hi Andy, I've read about some of the things you've discussed here and actually think I've seen it before when I was working with other transistors in parallel. Without installing certain resistors in the gate circuit, one would latch on and burn up. The transistors I'm working with today also have very fast rise and fall times suitable for use into VHF. While I do not have enough internal knowledge of the transistor workings, manufacturers are claiming these parts will transition between a positive coefficient at lower output levels and invert to a negative coefficient at "more practical" power levels. I have definitely seen this on the bench prior to stabilizing the bias tracking, but have no real way of confirming the source. [/QUOTE]

Top Bottom