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Thread: Astro Spectra Plus Mid power to high power

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    Default Astro Spectra Plus Mid power to high power

    I have a mid power r-split AS+. I would like to have a high power, I know I can move the vcon to a high power drawer however r-split high power drawers seem hard to come by. If I were to get a q or s split drawer can I move the contents of the mid power drawer over and make it a high power unit?

    Obviously tuning is a must if it is feasible. Anything else I am missing?


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    The PA will still be in the wrong band. IIRC the BSM/DSM details a specific PA module for each band split which makes me believe you'll either be doing a bunch of modification to the existing PA or finding another.

    However - you can use a PA from an analog Spectra of the same split... they are identical.

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    The RF board is the only non-band specific component on UHF... the preselector, VCO, and PA, as previously mentioned, are tied to band segments. Only the PA can be band-switched with component replacement.
    "The Girl Scouts found several hungry REACT members at the finish line..."

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    If all you need is ham band stuff, Q split astros will tune up to 440. Business band, you're out of luck, but the mod to get Q to tune up is relatively straightforward. I haven't done it myself but there are several articles online about the process with reported good results. It's very similar to tuning down an R split that isn't locking on 440.

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    Thanks everyone. Sounds a bit more involved than I was hoping it would be.

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    The best suggestion was get a 450 analog hi-power chassis, and replace everything in it with the AS+ guts. The only thing of the old analog radio you want to retain is the RF frontend, and the RF PA. Everything else swaps in, and you're done in 10 minutes, the only tool you'll need is a T15 driver. Easy-Peasy.

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    Quote Originally Posted by Alpha View Post
    The best suggestion was get a 450 analog hi-power chassis, and replace everything in it with the AS+ guts. The only thing of the old analog radio you want to retain is the RF frontend, and the RF PA. Everything else swaps in, and you're done in 10 minutes, the only tool you'll need is a T15 driver. Easy-Peasy.
    Perfect! That sounds much more palatable.

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    Quote Originally Posted by Alpha View Post
    The only thing of the old analog radio you want to retain is the RF frontend, and the RF PA.
    ...and the VCO.
    "The Girl Scouts found several hungry REACT members at the finish line..."

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