pill swap in a Stryker 440HP question.

[King Mudduck]

I talked to a driver today that was talking on a very loud but clear Stryker that some one had modified with a 2290 instead of the factory pill. He told me that he was seeing close to 90 watts from it. Can this be done and if so is there more to the modification that just changing pills?

I know that you can do the 1446 swap ( least i have been told you can) but i wondered if i would see any increase in power in doing so. The reason I'm thinking of trying this is so i can see more than the 45 pep watts that the radio does now.

I know i could see more if i clipped it but i don't remove the limiter in any of my radios any more because i hate the way they sound clipped!

 

[Toll_Free]

Don't do this...

reason 1:

The radios' final stage is "high level" modulated, unlike the connex radios, and other radios where the PA stage is tied directly to 13.8 volts. The result is greater linearity, howver, the 2290 would be way too much load on the modulator section, and cause failure..... often.

Umm. I have yet to find a Connex chassis that wasn't high level modulated.

High level modulation refers to modulation taking place on (at least) the final stage, and better, the driver as well. It has nothing to do with the method of applying delta V or delta I to the stage.

Low level modulation refers to modulating either the output of the balanced modulator, or the pre-driver / driver stage, and running the PA at A / AB linear operation. Cleaner output (unfiltered), at the expense of lower output for a given input power are the things related to low level audio.

reason 2:

The modulator section is specifically designed to high level modulate the transistors specified, with enough AF power, any more load, and 100% modulation capbility cannot be reached.

What are you guys using in that radio for a TX? Transformer modulation?

You should be seeing an EASY 55+ watts out of the radio. Make sure that the AMC is all the way up (we designed it this way knowing they would turn them all the way up) and make sure no one has played with the transmit bandpass filters, and all should be well.

--Toll_Free

 

[paws264]

What ever happened to this modification?

Didn't this mod use a 2290 and put out 90 watts?

.

 

[Shadetree Mechanic]

I have a 440 with the single pill. The mod with the toshiba looks interesting.