Re: [Drakelist] Drake TR7 Mystery Diode CR1?

2011-12-13 Thread Joe Pyles
The diode is on the back of the af gain rf gain on off switch pot. 73, Joe KC9LAD At 12:05 AM 12/13/2011, you wrote: On Mon, 12 Dec 2011 23:43:16 -0500 (EST), scpmil...@aol.com wrote: My Service Manual shows a diode CR1 across the + 12 volt line (I guess this is reverse polarity protection)

[Drakelist] Drake TR7 Mystery Diode CR1?

2011-12-12 Thread Scpmiller
I recently acquired a very nice TR7 and found it completely dead. I checked the usual suspects (PIN diodes in the TR switch) but nothing amiss there. More poking around and it looks like the power supply line may be shorted. My Service Manual shows a diode CR1 across the + 12 volt line

Re: [Drakelist] Drake TR7 Mystery Diode CR1?

2011-12-12 Thread Jim Shorney
On Mon, 12 Dec 2011 23:43:16 -0500 (EST), scpmil...@aol.com wrote: My Service Manual shows a diode CR1 across the + 12 volt line (I guess this is reverse polarity protection) but save for the block diagram in the manual I cannot find another reference to this diode and wonder where in the