Audio Amp and Filters

This audio amp is going to be the death of me. I am on like the 4th iteration of this board and still its not working right. Each time, something that worked now does not and this time it was the preamp. Everything else is working great, the SSB AF filter works perfectly, the AF amp works perfectly, i still have to build the CW filter and test it, but that I think should be ok. So i bypassed the preamp and things are great. Not sure i actually need the extra gain.

So now i have all the individual bits of the receiver working to the point where I can join them all together and see if I actually have a working receiver. If i get time tonight, that is exactly what I will be doing. Its getting close now to actually making noise.

 

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Power Amp Project, An Update

I got the heat spreader bar drilled, machined and tapped this time without breaking anything. Now i just have to order a dummyload and swr/power meter to be able to test it, as it should be all together today. I have the missing caps and inductors here to complete the job.

 

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IF Amp Board

I have built and tested the IF amp board for my receiver project. Its all system goes. The amps themselves are termination insensitive amps “TIA” by Wes Hayward. No reinventing the wheel when these things work so well. Though the 2nd IF amp might eventually become a Hycas so there is some AGC happening there.

 

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