I have a XFORCE 40012 base that was built for me in July 2015 with PP100's and regulated power supplies, I had to have it re-pilled the first time after about 3 years and used a matched set of 4 of the HG 2SC2879's after it burned a couple of the 1/4 watt resistors, also replaced the discolored 2 watt resistor across the input combiner. It had never seen more than 38-40 watts pep so just figured it was those junk PP100's... long story shortened a bit. It was re-pilled again about a year later under same circumstances. Now am preparing to do it one more time once again after about another year, this time I may have been to blame hitting it with 100-125 pep from my Stonewall as it toasted the 2 watt resistor across the input combiner this time, I found the body of that resistor was actually touching the ferrite core for the combiner and scorched it a bit as well as melted the wire wraps so it looks like I will be wrapping a new ferrite core and the power transformers on the input side.
Does anybody happen to know whether I should be using Type 43 or Type 61 ferrite core for that input combiner?
Another question I have is... Am I missing something here? during all this studying of the situation I noticed that the output combiner has no resistor across it like most of the pic's/videos I have seen, could this be part of my issues?
The attached pic was from 2018 before it was re-pilled the first time.
