Who makes this amp?

[T23]

Who makes this amp and what class is it , I am assuming its a C class by the way its setup. It uses 2 MRF450's. Any other info on this would be great. Modifications ect...


T23

 

[eagle1911]

Definitely appears to be class C because the bases of the transistors are grounded through that little VK200 choke attached to the input transformer. Not sure on a manu myself though..

 

[TonyV225]

That kind of reminds me of the old PRIDE 150 but I dont remember the PRIDE being class C

 

[T23]

Ok anyone have any idea how I would replace the keying circuit with only one relay? I am thinking of putting the guts in a new cabnet. I don't need the pre-amp.




T23

 

[eagle1911]

I'd think you could just pull that whole relay board out of there and replace it with a simple keying circuit of your own.

You could use the keying portion of this schematic pretty much verbatim:

http://cbtricks.com/Amp/txstar/skeleton100/graphics/ts_skeleton100_sch.pdf

 

[mackmobile43]

Ok anyone have any idea how I would replace the keying circuit with only one relay? I am thinking of putting the guts in a new cabnet. I don't need the pre-amp.




T23

The second relay is most likely for a preamp stage in that amp, got a pic of the face? ie switches.

 

[T23]

Yes Mack I know that the second relay is for the preamp. I have a keying circuit in mind. But was just wondering how to wire it to the board. I was going to use the keying circuit diagram of a Texas star skeleton 100 but apparently someone already made mention of it...


T23

 

[mackmobile43]

Yes but in my attempt to identify the amp thought it would help to see the front and did not consider that you would not understand it had a preamp circuit but it appears you have everything on that board to complete your circuit and it appears to even have a ssb delay circuit there also.

 

[liquidh8]

I have an old amp like that, has a G100 written on the front, not sure of the brand, but the guts look the same. I would love to make it class AB. Anyone know of a mrf450 am that is AB biased?