What changes do i need to make when swapping out Toshiba 2sc2879 for HG's?

[jtrouter]

Hello All.
Myself and a friend are wanting to build a couple of 4 transistor mobile amplifiers based on a old designs that have
been floating around the web for many years. However the plans uses Toshibas 2sc2879's but we are going to use HG's.
Can anyone tell me what changes do we need to make in using the HG's? We think or have heard its just the input and output
capacitance that needs to change, however any help would be appreciated
Thank you.

 

[Shadetree Mechanic]

I think it's just input and output tune. One thing that really helps to keep them stable, is to double up on the negative feedback resistors. I had a lot of fun with my X Force when I replaced the dei with HG.

Check it out:

X-Force 600HD Smoked

Hey guys, I need some advice. I have been running my X-Force 600HD with my Stryker 955 for about a year now. The other day I was talking on it on side band and noticed the output power disappeared. I unkeyed real quick and went over to the amp shelf and smelled an electrical smell. I unplugged...

www.worldwidedx.com

 

[Johnny Waggoner]

HG's need more wire. Check BBi on Youtube I bet he's got a video. I would try and figure out the numbers and look for Clad capacitors. I use them because if I use a matched pair of Transistors why not use good matching caps. Dont go by the old Texas Star schematics, there a Basic theory.

 

[Johnny Waggoner]

This is a very good informational video for a beginner.

 

[Johnny Waggoner]

 

[jtrouter]

This is a very good informational video for a beginner.

Yes indeed Sharky does amazing videos and very good information. I have seen all of his but thank you as they are a great source of info for anyone who comes across this post.