I have been contacted by an engineer in Argentina that is working on a MK5.5. I have a .pdf manual but it doesn't appear to have any information on the BernieBuilt filter that he used in later units (including the ECO iirc). The early low powered MK series appeared to have the normal coaxial filters but later had Bernie's internal flame thrower.
Anybody have documentation on the internal filter. IE, parts list, tuning info, etc?
FM does it with frequency!
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