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FULL _MEDIC,

Replacing the finals in your radio is not going to make one hill of beans of difference to any receiving radio. not to mention that you need to modify the circuit to be able to get the power out of those 497's. they are not just a drop in replacement.
also, are you sure the 497's you got aren't fakes? 99% of the 497's available and 100% of the 497's available on ebay are fakes.
could you post a picture of the ones you got so that we can confirm whether or not you got the real deal?

here's the straight scoop when it comes to increasing your power output.
you have to increase your power by a factor of 4 in order to increase your signal by 1 S unit in someone's receiver.
that means that if you deadkey 10 watts now, and hit someone with an S-5, you will have to deadkey 40 watts to hit them with an S-6. this holds true regardless of how much power you are talking about.

the diode you referred to is being used to vary the bias on the driver or final depending on the temperature. it is not a varactor diode. A varactor diode varies it's capacitance based on different voltages coming into it. the NTE610 that was recommended to you is a varactor diode and is not the right part to put in the bias diode spot.

LC

<blockquote data-quote="loosecannon" data-source="post: 646267" data-attributes="member: 1368">FULL _MEDIC,Replacing the finals in your radio is not going to make one hill of beans of difference to any receiving radio.&nbsp; not to mention that you need to modify the circuit to be able to get the power out of those 497&#039;s.&nbsp; they are not just a drop in replacement.also, are you sure the 497&#039;s you got aren&#039;t fakes?&nbsp; 99% of the 497&#039;s available and 100% of the 497&#039;s available on ebay are fakes.could you post a picture of the ones you got so that we can confirm whether or not you got the real deal?here&#039;s the straight scoop when it comes to increasing your power output.you have to increase your power by a factor of 4 in order to increase your signal by 1 S unit in someone&#039;s receiver.that means that if you deadkey 10 watts now, and hit someone with an S-5, you will have to deadkey 40 watts to hit them with an S-6.&nbsp; this holds true regardless of how much power you are talking about.the diode you referred to is being used to vary the bias on the driver or final depending on the temperature.&nbsp; it is not a varactor diode.&nbsp; A varactor diode varies it&#039;s capacitance based on different voltages coming into it.&nbsp; the NTE610 that was recommended to you is a varactor diode and is not the right part to put in the bias diode spot.LC</blockquote>

[QUOTE="loosecannon, post: 646267, member: 1368"] FULL _MEDIC, Replacing the finals in your radio is not going to make one hill of beans of difference to any receiving radio. not to mention that you need to modify the circuit to be able to get the power out of those 497's. they are not just a drop in replacement. also, are you sure the 497's you got aren't fakes? 99% of the 497's available and 100% of the 497's available on ebay are fakes. could you post a picture of the ones you got so that we can confirm whether or not you got the real deal? here's the straight scoop when it comes to increasing your power output. you have to increase your power by a factor of 4 in order to increase your signal by 1 S unit in someone's receiver. that means that if you deadkey 10 watts now, and hit someone with an S-5, you will have to deadkey 40 watts to hit them with an S-6. this holds true regardless of how much power you are talking about. the diode you referred to is being used to vary the bias on the driver or final depending on the temperature. it is not a varactor diode. A varactor diode varies it's capacitance based on different voltages coming into it. the NTE610 that was recommended to you is a varactor diode and is not the right part to put in the bias diode spot. LC [/QUOTE]

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