Fred Kimble wrote:
Hi gang: I just bought a TR-4 and AC-4 Power Supply and it was almost DOA. It blew a fuse in the p/s and I put another in and same. I looked in the p/s for all the obvious stuff but nothing. Any ideas? I really am depressed on this I can't afford to spend about $200.00 for repair..Thanks Fred AI5I
Fred -
There is a good article on troubleshooting the AC-4 power supply at
<http://www89405.temp.w1.com/DrakeArticles/TechTips/PowerSupplyTroubleshooting.htm>
If you determine that the supply is OK, then you can start in on the transmitter. There aren't too many faults in the TR-4 that can blow the power supply fuse. Two most likely are a short on the HV (650V DC) supply line or the filament supply line, often at the connector.
73, Garey - K4OAH Atlanta
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