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If you aren't seeing any bias current at TP1/2 or TP3/4 (final and driver); then it might be time to start check voltages.

Here is a link to the TRC-458, with has the voltage chart in it and is practically the same radio as the 139XLR:

http://www.worldwidedx.com/threads/realistic-navaho-trc-458-service-manual.162368/

[QUOTE="Robb, post: 583706, member: 8446"] If you aren't seeing any bias current at TP1/2 or TP3/4 (final and driver); then it might be time to start check voltages. Here is a link to the TRC-458, with has the voltage chart in it and is practically the same radio as the 139XLR: [URL]http://www.worldwidedx.com/threads/realistic-navaho-trc-458-service-manual.162368/[/URL] [/QUOTE]

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