Hello All,
This radio is from the late 60s. I need to replace a power resistor but there's no value on it but there is a part number. It is "17C40259A04-P". There is another number 66-42 below that. It looks like a wire wound fusible resistor. It seems as if 100 ohms works ok. What is the correct value?

Thanks,

Dave

Hello Again,
This radio is in SAMs AR-43. I don't have that volume. So please help if you can.

Thanks,

Dave
:Hello All,
: This radio is from the late 60s. I need to replace a power resistor but there's no value on it but there is a part number. It is "17C40259A04-P". There is another number 66-42 below that. It looks like a wire wound fusible resistor. It seems as if 100 ohms works ok. What is the correct value?
:
:Thanks,
:
:Dave

Hi Dave,
I finally got a chance to pull my AR-43 out of storage. That is a special PTC resistor (Positive Temperature Coefficient). The resistance stated is 175 ohms, but it doesn't say if that is the rating at room temperature or after the radio has been playing.

Correct voltages on the output transistors are measured with 12.6 volts supplying the radio, no signal applied. Base is 12.2 volts, Emitter is 12.3 volts, and the collector is 0.1 volt.

Meade

:Hello Again,
: This radio is in SAMs AR-43. I don't have that volume. So please help if you can.
:
:Thanks,
:
:Dave
::Hello All,
:: This radio is from the late 60s. I need to replace a power resistor but there's no value on it but there is a part number. It is "17C40259A04-P". There is another number 66-42 below that. It looks like a wire wound fusible resistor. It seems as if 100 ohms works ok. What is the correct value?
::
::Thanks,
::
::Dave

:Hi Dave,
:I finally got a chance to pull my AR-43 out of storage. That is a special PTC resistor (Positive Temperature Coefficient). The resistance stated is 175 ohms, but it doesn't say if that is the rating at room temperature or after the radio has been playing.
:
:Correct voltages on the output transistors are measured with 12.6 volts supplying the radio, no signal applied. Base is 12.2 volts, Emitter is 12.3 volts, and the collector is 0.1 volt.
:
:Meade
:
:
:
:
::Hello Again,
:: This radio is in SAMs AR-43. I don't have that volume. So please help if you can.
::
::Thanks,
::
::Dave
:::Hello All,
::: This radio is from the late 60s. I need to replace a power resistor but there's no value on it but there is a part number. It is "17C40259A04-P". There is another number 66-42 below that. It looks like a wire wound fusible resistor. It seems as if 100 ohms works ok. What is the correct value?
:::
:::Thanks,
:::
:::Dave

Mag,
Thanks for getting back to me. I called an electronics distributor who only had a 150 ohm PTC thermistor. I hope that the 150 ohm thermistor works as well because I don't think I'm going to find the correct one. I ordered it. I'll let you know how it works.

Thanks,

Dave
::Hi Dave,
::I finally got a chance to pull my AR-43 out of storage. That is a special PTC resistor (Positive Temperature Coefficient). The resistance stated is 175 ohms, but it doesn't say if that is the rating at room temperature or after the radio has been playing.
::
::Correct voltages on the output transistors are measured with 12.6 volts supplying the radio, no signal applied. Base is 12.2 volts, Emitter is 12.3 volts, and the collector is 0.1 volt.
::
::Meade
::
::
::
::
:::Hello Again,
::: This radio is in SAMs AR-43. I don't have that volume. So please help if you can.
:::
:::Thanks,
:::
:::Dave
::::Hello All,
:::: This radio is from the late 60s. I need to replace a power resistor but there's no value on it but there is a part number. It is "17C40259A04-P". There is another number 66-42 below that. It looks like a wire wound fusible resistor. It seems as if 100 ohms works ok. What is the correct value?
::::
::::Thanks,
::::
::::Dave