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At 90 watts the 1446 is producing quite a bit of IMD.

Hello all. Does anyone know where to get transmit and receive crystals for these old beauties? I need them for channel 28 and maybe channel 35. What are the trans / receive frequencies for these crystals? Also does anyone know of a way to lower the carrier on these old radios?? Thanks in...

If you want good recieve and good transmit get a older grany or 148, do a variable deadkey and nothing to major. If recieve is not an issue get a older 29 do a variable deadkey, same deal. 10 watts avg or bird will peak at about 25 or so watts.

About 65 amps with a nominal radio as a driver.

How would you direct feed a quad without issues? Would it not require some sort of balun for it to radiate correctly?

It looks to me like the wire went where you drew the arrow and also a 2 resistors in parallel from there to ground. They look like 68 ohms 2 watt.

I was referring to the green cap on the board

Nope, when I repair these I have to use ohm meter to "ring" out what does what. Depending on what you use the amplifier for I would just do as described above or add a variable power to it using a 2 watt 100 ohm potentiometer and some 2 watt 100 ohm resistors. These amplifiers have a decent...

Your amp is exactly the same as this amp http://www.worldwidedx.com/amplifiers/46767-cobra-xl-450-a.html

I have not a seen a bomade in a while but from what I remember they have been a round a while. I also remember that those guys had amps from small to massive (not just a price list saying they built them) I remember seeing them a lot at the keydowns in the 90's. Worked on a few in the late...

Sold

Yeah give me a shout sometime. I took a break but I stayed at it on a personal level. It is hard to do it with passion when you are under the gun. I still lurked around and somewhat stayed in the loop. Over the years my test equipment list kept growing and growing which of course makes building...

Again, thanks. Sure makes it easier

I was just reading that thinking, WTH. i do not remember sending him that. It is cool though for sure, thanks WR0220:thumbup::thumbup::thumbup::thumbup:

2 watt 10 ohms? From base to emitter? That is one time I "believe" overkill is not needed. In my experience the only time a 1/2 watt smokes or gets hot is when the transistor goes south. I also use 100 ohm in the feedback circuit but in amplifiers that are more prone to oscillation I use a value...

Yep, I have seen many 2 watt resistors that have been over heated when used in a negative feed back circuit.

1/2 watt resistors? In my experience 1/2 watt resistors do not last long in an amplifiers when used for negative feedback. Maybe in a perfect world but that is never the case in a CB scenario.

:thumbup1:

I have that one. I am just going to sit down and slowly decipher it so I can easily see what is what when I start to trace it all down.

My schematics are blurry. Kind of hard to decipher what is what in my version.