That's interesting Jim. I don't think I've ever tested orange drops for leakage now that you mention it. In the repair business we replace the defective component and if the symptom disappears we ship it. Time and money seem to get in the way of full scientific research. When I build (home brew) with old components I do check for leakage either with the VTVM on "X 1M" or for couplets I check the grid pin of the next stage and make sure it shows zero volts when the tube is pulled. When you make these checks for leakage do you do it at the rated voltage or do you check to see if it is a purely linear leakage function at lower voltages? How about power factor do you check for internal series losses?
John WA5BXO -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim candela Sent: Thursday, November 20, 2003 6:40 AM To: amradio@mailman.qth.net Subject: RE: [AMRadio] Re: GB> WOW !! NOS Black Beauties, I can hardly wait John, As it turned out that company went out of business 5 years later, and I went down with the ship. During the clean-up phase (sell what you can, toss in the dumpster the rest, or take home) I got the container of those .47uf 400 volt Black Cat's (only have 4 left). It is interesting that these all test excellent on my Eico RC bridge for leakage whereas several Orange drops that I have (.1 uf 600 vdc, used) show several microamps of leakage at rated voltage. I just bought some new type 715 Orange drops (same value), and I will test them to see if they too show leakage. Regards, Jim -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of John Coleman Sent: Wednesday, November 19, 2003 9:42 AM To: amradio@mailman.qth.net Subject: RE: [AMRadio] Re: GB> WOW !! NOS Black Beauties, I can hardly wait Jim, that story is so ridiculous that it has to be true. But I won't to know who (in a pinch) has ever rolled there on wax paper, plastic, Mylar, whatever, capacitor. I'm not talking about a gimmick wire twist. I'm talking about .001uf or more. I'm talking about laying out the tin foil and plastic or paper insulator sheets and rolling them up on a stick, taping it up, crimping some wires to the foils or screwing them down to standoffs. Lets hear it folks, tell the truth. John, WA5BXO -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim Candela Sent: Wednesday, November 19, 2003 8:04 AM To: amradio@mailman.qth.net Subject: Re: [AMRadio] Re: GB> WOW !! NOS Black Beauties, I can hardly wait My boss then looked for something to plug the hole, and after a number of unsucessful tries, tried a .47uf 400v Black cat capacitor, and with a small hammer, drove it into the pvc pipe end to plug the leak. I was told to never touch it! Now my friends, that is an excellent application for the famous Black cat capacitor! This is a true story. Regards, Jim _______________________________________________ AMRadio mailing list AMRadio@mailman.qth.net http://mailman.qth.net/mailman/listinfo/amradio _______________________________________________ AMRadio mailing list AMRadio@mailman.qth.net http://mailman.qth.net/mailman/listinfo/amradio
