MAGNUM 257 MODS PAGE

All of the info here was submitted by various individuals and I thank them for their help and input.

vr 16 am power
vr 4 modulation
vr 9 ssb alc
vr 14 fm power
vr 8 rf meter


The stock mic  if you take the cover off of it, you will see only 1 vr adjustment inside the microphone, this is actually a power mic, and turning it one way or the other will increase or decrease your modulation just like a power mic......

Just a side note, their are 2 different styles of this radio, pre 2000 models and post 2000 models..
the channel conversion is different but extremely easy to figure out......

If you buy the ultimate modifications bible vol #11 you will find a swing kit installation in this
book..... These are one of the plans that can be bought for 20 dollars, but are included in
this book..... Book is also known as the UMB#11......

Super Mod Modification for Mag 257 (Louder Audio, more Swing)

Please note - I had excellent results on a Magnum 257 with only doing the diode resistor modification on the back of the board...I have not done the RF/Mic gain control part of the modification listed below and do not know if it is necessary.

PiPicture of Back of board diode and resistor