Posts: 9
Threads: 2
Joined: Jun 2024
City: Lake Jackson
State, Province, Country: Texas
Restoring this unit, and finally found the Code 123 documentation. Question: C4 temp comp. Fixed trimmer is 13 picofarad, as the change indicates. Is this a tubular mica of some sort, and do I really need to replace it? Same question for C6, 47 pF on the 50C5 tube.
For these types of radios, I always replace all wax caps and resistors.
This is my first post on this group. THANKS MUCH
Mark
Posts: 16,533
Threads: 573
Joined: Oct 2011
City: Jackson
State, Province, Country: NJ
You do not replace ceramic or mica caps, unless you have some reason to believe they are bad.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
Posts: 9
Threads: 2
Joined: Jun 2024
City: Lake Jackson
State, Province, Country: Texas
Thanks much! I suppose, because of the stated values in pF, that they are mica?
Mark
Posts: 16,533
Threads: 573
Joined: Oct 2011
City: Jackson
State, Province, Country: NJ
If tubular (an empty small cylinder) - they are likely ceramic. A photo would help.
Mica caps are typically rectangular, while ceramic can be anything, disc, rectangular and tubular.
(strictly speaking, mica are ceramic caps, but usually they stand apart)
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
