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David Simpson · 30th Jun 2019, 11:42 am

Thankfully, the three parallel 807's in my CR Nimbus behave themselves on 80m, and in valve testers. However, I recall when VCM testing their siblings - the VT136's - that without a ferrite beaded extension valve holder, the VT136 burst into parasitic oscillation towards the top of the slope. My diddy wee Watson Super Hunter hand-held freq. counter revealed a prominent parasite in the 50MHz region.

Regards, David

30th Jun 2019, 11:42 am	#16
David Simpson Nonode Join Date: Mar 2008 Location: Aberdeen, UK. Posts: 2,858	Re: Ex marine AM radio equipment. Thankfully, the three parallel 807's in my CR Nimbus behave themselves on 80m, and in valve testers. However, I recall when VCM testing their siblings - the VT136's - that without a ferrite beaded extension valve holder, the VT136 burst into parasitic oscillation towards the top of the slope. My diddy wee Watson Super Hunter hand-held freq. counter revealed a prominent parasite in the 50MHz region. Regards, David