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UPDATE: Problem solved !!

I opened up my 139XLR and removed R113. When I measured its value I found it to be 68.1 ohms. I replaced it with the 150 Ohm R113 that I removed from an 858SSb parts board, and now C101 is cool as a cucumber.

Evidentally this was a running production change that Uniden made, but never issued a service bulletin because the hot cap didn't affect operation of the radio.
The 139XLR was the first 858 chassis on the market, and Sams #126 showed the original 858SSb circuit and 68 ohm R113. Subsequent Sams for later 858s all show the 150 ohm part.

Thanks to Guitar_199 for noticing the R113 discrepancy and to BC Coyote for pointing me in the right direction to begin with.
AND . . . definitely thanks to everyone else for their insight and suggestions. This was a really weird problem, but once again WWDX forum members figured it out. You guys are the best !!

- J.J. 399

<blockquote data-quote="unit_399" data-source="post: 844665" data-attributes="member: 7311">UPDATE: Problem solved !!I opened up my 139XLR and removed R113. When I measured its value I found it to be 68.1 ohms. I replaced it with the 150 Ohm R113 that I removed from an 858SSb parts board, and now C101 is cool as a cucumber.&nbsp;Evidentally this was a running production change that Uniden made, but never issued a service bulletin because the hot cap didn&#039;t affect operation of the radio.The 139XLR was the first 858 chassis on the market, and Sams #126 showed the original 858SSb circuit and 68 ohm R113. Subsequent Sams for later 858s all show the 150 ohm part. Thanks to Guitar_199 for noticing the R113 discrepancy and to BC Coyote for pointing me in the right direction to begin with.AND . . . definitely thanks to everyone else for their insight and suggestions. This was a really weird problem, but once again WWDX forum members figured it out. You guys are the best !!- J.J. 399</blockquote>

[QUOTE="unit_399, post: 844665, member: 7311"] [U][B]UPDATE: Problem solved !![/B][/U] I opened up my 139XLR and removed R113. When I measured its value I found it to be 68.1 ohms. I replaced it with the 150 Ohm R113 that I removed from an 858SSb parts board, and now C101 is cool as a cucumber. Evidentally this was a running production change that Uniden made, but never issued a service bulletin because the hot cap didn't affect operation of the radio. The 139XLR was the first 858 chassis on the market, and Sams #126 showed the original 858SSb circuit and 68 ohm R113. Subsequent Sams for later 858s all show the 150 ohm part. Thanks to Guitar_199 for noticing the R113 discrepancy and to BC Coyote for pointing me in the right direction to begin with. AND . . . definitely thanks to everyone else for their insight and suggestions. This was a really weird problem, but once again WWDX forum members figured it out. You guys are the best !! - J.J. 399 [/QUOTE]

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