Bias design, amplifier design, filtering etc.

[AudioShockwav]

ExitThirteen
Look at this.
Don't remember what page it is but there is one on RF transistor amp in there.
73
Jeff

 

[Jay Mojave]

Hello Jeff: Ok thanks for the info here I printed out the bias sites for reading. I have a circuit I made a few years ago using a voltage regulator a Zener diode and another voltage regulator,... I think. It regulated right at the 1 volt level at 3 amps.

I was impressed with the guys 3 bias circuit in the past postings. Came across a 8 pill that needs bias for SSB, probably will use 4 bias circuits for that while watching a scope and spectrum analyzer. Another project great....

Jay in the Great Mojave Desert

 

[9C1Driver]

Sure wish PEAKABOO was still building. Wish I still had my Joker, it was two 2879's with regulated AB bias.

 

[RParz]

Sure wish PEAKABOO was still building. Wish I still had my Joker, it was two 2879's with regulated AB bias.

Is that the Joker amp from back in the day? I was trying to find my Joker amp recently, and it looks a lot like yours. The diamond plate and the heatsink sandwiched with the n on top. It's a base unit with 2290's and some nice filtering. I think I bought it off this site, of Moleculo -- had to be early 2000's. It's been sitting in a box on the shelf for years.....Is there a demand for these things?

 

[Shadetree Mechanic]

Bias bump

 

[FredTx63]

Bumping some oldies but goodies there Shadetree.

 

[lonestarbandit]

Is that the Joker amp from back in the day? I was trying to find my Joker amp recently, and it looks a lot like yours. The diamond plate and the heatsink sandwiched with the n on top. It's a base unit with 2290's and some nice filtering. I think I bought it off this site, of Moleculo -- had to be early 2000's. It's been sitting in a box on the shelf for years.....Is there a demand for these things?

I had a joker once. Long skinny 6x I think it was diamond plate ... I saw it listed in some Dallas cb shop on FB a while back but they sold it again before I had a chance to inquire and see if it was my old one.

 

[AudioShockwav]

A good reference page.

Transistor PA Bias Circuits

www.ifwtech.co.uk

73
Jeff