Skip: Thanks for the antique stove tip. I had searched mica insulator and just found transistor insulators. Mica sheets arrived Friday, and I got the TX fired up today. The amp appears to be very comfortable in the area of 200-250 Watt output. I got it up to 300W at one point but it didn't seem to like that as well. We always ran it at about 200W before when it was in operation.
Now I just need to schedule some help to load it in the pickup and then take the 60 mile drive to the repeater site. John Lock kf0m at arrl.net > -----Original Message----- > From: Repeater-Builder@yahoogroups.com > [mailto:[EMAIL PROTECTED] Behalf Of skipp025 > Sent: Monday, February 25, 2008 11:08 AM > To: Repeater-Builder@yahoogroups.com > Subject: [Repeater-Builder] Re: Motorola TLD6612A amp repair > > > Hi John, > > > "kf0m" <[EMAIL PROTECTED]> wrote: > > I am working on repair of a TLD6612A 2 meter repeater amp > > that runs a pair of 8560AS tubes. > > Should be quite the smokin' signal when you have the amplifeir > in line. > > > It worked fine for a number of years and then suffered > > what appeared to be lightning damage. > > > > The insulator between the plate line and the plate tuning > > disc was arced through among other damage. It is a rectangular > > piece of clear material that looks like mica. > > If it is a clearish but dark material it probably is mica. If > it's the thicker white insulating material it might be beryllium > oxide, which has danger warnings about breathing any dust from > the material when drilling or cutting into it. > > > I tried adding some Teflon tape to cover up the puncture. > > Nope, ain't gonna work. > > > When I fired up the amp today, It arced through again during > > the tune up process. Anyone have suggestions for a replacement > > or have one in their junk box? > > > > John Lock > > kf0m at arrl.net > > Google mica sheet and or look at companies like McMaster Carr. You > can often find small sheets and parts at woodstove and appliance > repair places/stores. > > www.antiquestoves.com is one place I found some mica sheeting > available on line. > > And of course I searched "mica sheet" on Ebay and hit 10 or so > supply sources right off the starting line. > > cheers, > s. > > > > > > > > > > Yahoo! Groups Links > > > >
