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any mods available 4 cobra 135xlr channel & power
- Thread starter radioreddz
- Start date
Only problem with "power mods" for a base station is the need to chuck the internal power supply and hook it up to an external DC supply.
Making the final larger won't make the power supply larger. Power has to come from somewhere.
A higher-capacity switchmode supply might fit in place of the original, but making it fit could become a headache.
The same money spent on an amplifier delivers a much better bang for the buck.
Much better.
73
Making the final larger won't make the power supply larger. Power has to come from somewhere.
A higher-capacity switchmode supply might fit in place of the original, but making it fit could become a headache.
The same money spent on an amplifier delivers a much better bang for the buck.
Much better.
73
The 132xlr and 135xlr are not 858 radios they are 5080 pll and yes I'm well aware of expo kits used them many times but want to do it it with simple pin manipulation if I can has anyone done mosfet conversion on one of this type yet?
Haven't put channels into a 5080 radio in a long time. Best I remember, you had to change two pins to go up 32 channels. And lower channels were a problem of some sort.
Not the most channel-friendly chip ever sold.
MOSFET conversion will definitely start with a power supply twice the size of the one built in. Even if you don't get much more RF power, a MOSFET will still consume twice as much DC power.
But not from the factory-stock supply. It's just barely up to the demands of the stock radio. No additional capacity there to call on.
73
Not the most channel-friendly chip ever sold.
MOSFET conversion will definitely start with a power supply twice the size of the one built in. Even if you don't get much more RF power, a MOSFET will still consume twice as much DC power.
But not from the factory-stock supply. It's just barely up to the demands of the stock radio. No additional capacity there to call on.
73
Just checked the Secret CB archive.
http://www.cbtricks.com/pub/secret_cb/vol_10/graphics/secret_cb_vol_10_pg43_44.pdf
As always, expect at least one typo. Usually more than one.
73
http://www.cbtricks.com/pub/secret_cb/vol_10/graphics/secret_cb_vol_10_pg43_44.pdf
As always, expect at least one typo. Usually more than one.
73
Wow, you are right! I made the mistake of thinking it was a 858 chassis. Was thinking 138. My mistake!
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@ ButtFuzz:Please advise me to what is a good replacement mic for my SR-497HPC... Answer: 497 is "wired like Cobra", so many choices available. That radio does not need a power mic, so purchase a stock "coffin style" mic with a decent cord, like the ones that Astatic uses. The Superstar DM-507 is my go-to. https://www.ebay.com/itm/3050474478...adANq91JSiEEnz8EGqPJRBloTgEyaVsBoCtoMQAvD_BwE $12.99 + .99 cent shipping.