Hunter, et.al.: I have a T-4XC that would produce output power for a period of time and then, suddenly, no output. If the rig was turned off and allowed to cool down, then turnd on, the output power would again appear. Several minutes later, same thing... no output power.
In my case, CR19 in the cathode circuit of the driver, V4 (the ubiquitous 12BY7), was intermittent. With the transmitter turned off (and back to room temperature), a DMM in the "diode" function was used to measure the forward conduction of the diode. The diode seemed alright. Then, applying heat from a soldering iron to one lead of the diode would produce an open. After the diode cooled, it would measure alright again. Upon removing the diode, I noticed there was a crack in the case. Since I didn't have the B5G5 diode used by Drake, I substituted a 1N4005 (1A/600V). I don't think the exact part is too critical so any silicon diode with sufficient current carrying capability (100 mA or more) and reverse breakdown voltage rating (300 Vdc or more) should work. Comments Garrey? Bob K9JU
_______________________________________________ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
