Buy a couple of spares and keep them in the manual at the site.
On Sat, Jun 20, 2009 at 1:48 PM, Adam Feuer<[email protected]> wrote: > Wow! Thanks for the tip. I changed out that FET and the sensitivity is > back to normal. I went to Radio Shack and used an MPF-102. > > Now the question: Do I put it back at the site with the Radio Shack > device? (I'm not sure who makes their transistors) Or do I order > something better? > > Thanks again! > > Adam N2ACF > > > DCFluX wrote: >> 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<[email protected]> 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 >>> >>> >>> >>> >>> >> >> >> ------------------------------------ >> >> >> >> Yahoo! Groups Links >> >> >> >> >> > > > > ------------------------------------ > > > > Yahoo! Groups Links > > > >
