Galaxy 225

[RunAway15]

Decent little amp for the money, that said your radio is pretty strong for that amp. Your dead key input is ok but your peak wattage from the radio is probably too strong. You might add a fan to the heat sink on the amp to help keep it cool. Here are what those finals will cost if/when you smoke em.

https://www.rfparts.com/rftransistors/transistor-sd/sd1446.html

Pricey..

 

[RunAway15]

You may well be over-driving it if it getting real hot.

I have the same box, but have not run it in awhile. Cannot remember what it did exactly. I think it uses a 75w device @12.5vdc. So two should do 150 to 175w output @13.8vdc with 10w/PEP input - using a 50 ohm dummy load to measure the output..

After some rearranging stuff and swapping to a shorter jumper cable my numbers reflect more of what you said. Probably had some fluff watts going on. 13.8 is about what I run too..

 

[9C1Driver]

Pricey..

Changing a ju


Yup, they have gone way up since they are no longer made. When the supply is gone then prices will really skyrocket.

Also changing a jumper like that should not change anything for the most part, you might have a mis match between the amp and radio. Changing a jumper does not solve the problem. I am currently running a Silver Streak 175 in the mobile. Same 1446 finals. I run 90% SSB and with only 8-10 watts of drive from a Magnum Delta Force that amp will hit 150-160 easy watts. If I drive it with 16-18 watts it will do more power but the amp gets warm fast because it's being overdriven.

 

[RunAway15]

Changing a ju


Yup, they have gone way up since they are no longer made. When the supply is gone then prices will really skyrocket.

Also changing a jumper like that should not change anything for the most part, you might have a mis match between the amp and radio. Changing a jumper does not solve the problem. I am currently running a Silver Streak 175 in the mobile. Same 1446 finals. I run 90% SSB and with only 8-10 watts of drive from a Magnum Delta Force that amp will hit 150-160 easy watts. If I drive it with 16-18 watts it will do more power but the amp gets warm fast because it's being overdriven.

Yeah, not that the length changed anything, but I think my SWR was suffering a little so I changed it out with the shorter one.