Hooking up yaesu ft-101e to heathkit sb-200

[Strikesmith]

Greetings Gentlemen!
As title says ,What do I need to look out for,avoid etc in hooking these two together?

Regards,
Strikesmith

 

[nomadradio]

The FT101 is pretty much the size radio the SB200 was meant to work with.

Just don't try to run the amplifier from 120 Volts if you can avoid it. Unless your 120-Volt outlet is within 10 feet or so from the breaker box there will be a voltage drop on the outlet when the RF output is at its max. When this happens, the voltage lighting up the filaments will also drop. If it drops enough, the temperature of the filament in the tube will fall. Running the amplifier with the temperature of those filaments too low will wear them out prematurely. Screws up the chemistry of the filament's tungsten alloy. It will cause them to drop power and become "soft" as they say. Yes, you'll hear someone say that you "starved the amplifier for high voltage".

Not the reason behind the risk. Odds are you can peer into the amplifier from the top or sides and see the yellow-white color of the hot filaments. The color of a piece of hot metal reveals its temperature. If you see the color of the light from those filaments fade and "redden" slightly when you modulate the radio, it's time to either switch it to 240 Volts or arrange a stouter 120-Volt connection. The shorter the run of wire from the breaker box to the outlet the better. And it should be wired with number 12 wire, the fattest size legal to use on a 120-Volt outlet.

And don't hammer the amplifier with a big AM carrier much over 120 to 150 Watts.

73

 

[Strikesmith]

Thank You very much!Is there gonna be a problem keying the amp with the Yaesu?
Regards.
Strikesmith

 

[Strikesmith]

The FT101 is pretty much the size radio the SB200 was meant to work with.

Just don't try to run the amplifier from 120 Volts if you can avoid it. Unless your 120-Volt outlet is within 10 feet or so from the breaker box there will be a voltage drop on the outlet when the RF output is at its max. When this happens, the voltage lighting up the filaments will also drop. If it drops enough, the temperature of the filament in the tube will fall. Running the amplifier with the temperature of those filaments too low will wear them out prematurely. Screws up the chemistry of the filament's tungsten alloy. It will cause them to drop power and become "soft" as they say. Yes, you'll hear someone say that you "starved the amplifier for high voltage".

Not the reason behind the risk. Odds are you can peer into the amplifier from the top or sides and see the yellow-white color of the hot filaments. The color of a piece of hot metal reveals its temperature. If you see the color of the light from those filaments fade and "redden" slightly when you modulate the radio, it's time to either switch it to 240 Volts or arrange a stouter 120-Volt connection. The shorter the run of wire from the breaker box to the outlet the better. And it should be wired with number 12 wire, the fattest size legal to use on a 120-Volt outlet.

And don't hammer the amplifier with a big AM carrier much over 120 to 150 Watts.

73

Is there gonna be a problem keying the amp with the Yaesu!Thanks in advance!
Regards,
Strikesmith

 

[The20poundhammer]

Should be no problem at all my FT 101ZD keys my Alpha 78 just fine. Nomad did a great job with that combo for me.

 

[nomadradio]

You'll need to pull out the round plug marked "accessory", or maybe "ACC" on the radio's rear panel. A wire goes into pin number 9 on the plug and gets soldered. The other end of the wire goes to the screw terminal on the rear of the linear, marked "RY".

This will close the FL2100's relay when the mike is keyed.

73