The only thing I can see is it may be an RF current issue, Both capacitors together may create a current carrying issue which is why Drake used a wire braid jumper from the common point and the chassis ground lug. I know today they would be taken directly to the ground lug, but who knows what they were thinking 30 years ago.
Ron / WB4HFN -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Garey Barrell Sent: Friday, February 04, 2011 3:36 PM To: drakelist Subject: Re: [Drakelist] L-75 question Evan - OK, I see them. I can't figure out what they were thinking. There doesn't appear to be any reason for that, unless the new capacitor leads weren't long enough to reach the ground lug. Anyway, that's my guess and I'm sticking to it! :-) 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line and TR-4/C Service Supplement CDs <www.k4oah.com> K9sqg wrote: > Garey, > > These are C34 and C36. They are 700 pf disc ceramic. > > 73, > > Evan > > > > -----Original Message----- > From: Garey Barrell <[email protected]> > To: K9sqg <[email protected]> > Sent: Fri, Feb 4, 2011 12:47 pm > Subject: Re: [Drakelist] L-75 question > > Evan - > > What are the two caps you are referring to? > > 73, Garey - K4OAH > Glen Allen, VA > > Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line > and TR-4/C Service Supplement CDs > <www.k4oah.com <http://www.k4oah.com>> > > K9sqg wrote: > > > > > > > > Fellow enthusiasts, > > > > Have a question about S2C in the L-75 linear, it is the wafer switch > > controlled by the lever on the front panel for use on 160 and 80 > > meters. The two switchable load capacitors are located from some > > terminals with one end of each cap going to a "common" terminal on the > > switch, and then a lead from there to ground. However, that "common" > > terminal is not connected electrically to any part of the circuit. > > Was just curious as to why the ground side of each cap is connected > > to an unused terminal when in fact there is a ground lug very close to > > that switch that could be used for the ground termination. I'm going > > to be replacing those caps and plan on using the ground lug rather > > than that electrically isolated switch terminal. But then, am I > > missing something here? I'm sure Drake had a reason for doing what > > they did, but I can't figure out what it is. At one time I thought > > that maybe it would be a simplified manufacturing process to mount the > > caps to the switch before installation but then that didn't make > sense > since a wire/braid had to be run from that terminal to the > ground lug > anyway. Your thoughts? > > > > 73, > > > > Evan, K9SQG > > > _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
