You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.

Reply to thread

Message

Do you have any way to make a measurement inside the radio?

Starting point is to make sure the modulator circuit is feeding full voltage to the driver and final transistors. Adding a second final doubles the load on the modulator transistor. Might be okay, might not.

The metal tab on final or driver transistor should have at least 12 Volts DC on it under the conditions: USB or LSB, mike gain at zero, mike keyed.

73

[QUOTE="nomadradio, post: 766914, member: 22"] Do you have any way to make a measurement inside the radio? Starting point is to make sure the modulator circuit is feeding full voltage to the driver and final transistors. Adding a second final doubles the load on the modulator transistor. Might be okay, might not. The metal tab on final or driver transistor should have at least 12 Volts DC on it under the conditions: USB or LSB, mike gain at zero, mike keyed. 73 [/QUOTE]

Top Bottom