Did you do any parts transplanting on the boards? Sometimes reflowing the solder around the finals will float out some black swarf, lift it out with a q-tip until it is clean - retest. Spurs when the power is turned down around mid-range indicate a failing output transistor, take a crayon or lipstick and make a mark on the finals and run the pa deck into a dummy load till you see the color changing with a flashlight, there will be one part not heating the same and this one has either a bad cap or a failing base-emitter junction, sometimes you can reflow the solder joints and make these come back if the radio was really wet (in a car wreck and the case twisted open while pa deck was hot allowing water to chill the parts to quickly), try the reflowing method first before condemning any parts.
Adi Linden wrote: > > Hi, > > I am tuning a Mitrek T53 VHF radio for the 2 meter band. I am using a > proper service manual. I can adjust R911 to whatever power level between > 0 Watt and 80 Watt and the transmitter output is clean. However, when I > adjust R909 I see spurs at about 1 MHz above and below as well as 1.5 MHz > above and below the carrier frequency. Any idea why that would be? My goal > is to have a final power output of about 35 Watt out of this radio. > > Adi > -- > Adi Linden | va3adi | [EMAIL PROTECTED] | http://adis.ca > +-----------------------------------------------------------------+ > IRLP Node 2590 in Sioux Lookout, Ontario > > > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ -- 73...Clark Beckman N8PZD Pursuant to U.S. Code, title 47, Chapter 5, Subchapter II, �227, "Any and all nonsolicited commercial E-mail sent to this address is subject to a download and archival fee of $500.00 U.S.". E-mailing denotes acceptance of these terms. Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
