Replace the FET that is in the helical casting. on the RF Pre-selector board. It is a 2N4416, Radioshack carries the MPF-102 as a readily available substitution. I'd use a J-310 if you have one.
See: http://www.repeater-builder.com/ge/lbi-library/lbi-4991g.pdf On Fri, Jun 19, 2009 at 11:27 AM, Adam Feuer<feu...@optonline.net> wrote: > Hello All > > I've had a MastrII low band receiver (29.540) on the air for close to 10 > years now with no issues. It's been very sensitive and breaks squelch at > around .17uv. > > Recently, after a lightening storm, the receiver went deaf. I went to > the site thinking that the antenna might have got struck by lightening > but it turns out that the receiver now breaks squelch and around 8uv. > (or whatever is in between the 5 and 10uv setting on my IFR1200S) The > antenna checks out fine. > > Having only tuned these receivers up and never having to trouble shoot a > failure, I'm wondering if anyone knows of a "smoking gun" when it comes > to a MastrII receiver failure like this. I'm going to dig out the book > and see what I can find but any help or guidance would be greatly > appreciated. > > Thanks in advance! > > Adam N2ACF > > > ------------------------------------ > > > > Yahoo! Groups Links > > > >
